CN113805507A - Low-power consumption electronic switch device and equipment control system - Google Patents

Low-power consumption electronic switch device and equipment control system Download PDF

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Publication number
CN113805507A
CN113805507A CN202111014193.2A CN202111014193A CN113805507A CN 113805507 A CN113805507 A CN 113805507A CN 202111014193 A CN202111014193 A CN 202111014193A CN 113805507 A CN113805507 A CN 113805507A
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China
Prior art keywords
resistor
capacitor
wake
electrically connected
triode
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CN202111014193.2A
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Chinese (zh)
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覃德迎
徐涛
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Shenzhen Fenda Intelligent Technology Co ltd
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Shenzhen Fenda Intelligent Technology Co ltd
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Priority to CN202111014193.2A priority Critical patent/CN113805507A/en
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423—Input/output
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/21—Pc I-O input output
    • G05B2219/21119—Circuit for signal adaption, voltage level shift, filter noise

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electronic Switches (AREA)

Abstract

The invention discloses a low-power consumption electronic switch device, which comprises an electronic switch circuit, a clock wake-up circuit, an external wake-up circuit and a key wake-up circuit, wherein the electronic switch circuit is connected with the clock wake-up circuit; clock wake-up circuit, outside wake-up circuit, button wake-up circuit respectively with electronic switch circuit electric connection, be used for controlling electronic switch circuit's break-make, thereby the break-make of control power and equipment and the break-make of the master control MCU of power and equipment, thereby make the switching of equipment between standby state and normal operating condition, lead to master control MCU life weak point, product development cycle length, master control MCU is absorbed into the halted condition scheduling problem easily when having solved current switching through master control MCU control system low-power consumption. The invention also provides a low-power consumption equipment control system.

Description

Low-power consumption electronic switch device and equipment control system
Technical Field
The present invention relates to electronic switches, and more particularly, to a low power electronic switch device and a low power device control system.
Background
For most low-power electronic devices at present, the low power consumption of the system is generally achieved by waking up the MCU in a deep sleep mode or a hiccup mode. That is, when the MCU receives an interrupt signal from the outside, the MCU is restarted and enters a normal operating state, otherwise the MCU is always in a sleep mode or a low power mode, etc. However, the working mechanism has the following defects:
(1) generally, a corresponding software program is arranged in the MCU, and the software controls the switching of the working mode of the MCU; when the software program is developed, the control logic is complex, a long debugging period is needed, and the product cannot enter the market quickly;
(2) in the actual using process, after the MCU works for a long time, once the MCU enters a low power consumption mode, the MCU is difficult to wake up, even the MCU is in a halt state, and the using experience of a user is influenced;
(3) in the above mode, the MCU is actually in a working state all the time because the MCU is required to receive the interrupt signal, which relatively shortens the service life of the MCU;
(4) for devices with higher power consumption requirements, a special chip is also required to be selected as the MCU, and the supply chain selection has limitations for manufacturers.
Disclosure of Invention
In order to overcome the defects of the prior art, an object of the present invention is to provide a low power consumption electronic switch device, which can solve the problems of long product debugging period, easy crash of the MCU, short service life of the MCU, etc. during low power consumption control of the system in the prior art.
The second purpose of the present invention is to provide a low power consumption device control system, which can solve the problems of long product debugging period, easy crash of the MCU, short MCU service life, etc. in the low power consumption control of the system in the prior art.
One of the purposes of the invention is realized by adopting the following technical scheme:
a low-power consumption electronic switch device comprises an electronic switch circuit, a clock wake-up circuit, an external wake-up circuit and a key wake-up circuit; the first input end of the electronic switch circuit is electrically connected with an external power supply, the first output end outputs a device power supply, and the second output end outputs a master control MCU power supply; the clock wake-up circuit, the external wake-up circuit and the key wake-up circuit are respectively electrically connected with the electronic switch circuit and are used for controlling the on-off of the electronic switch circuit so as to control the on-off of the power supply and the equipment and the on-off of the power supply and the main control MCU of the equipment;
the clock wake-up circuit is electrically connected with the electronic switch circuit and is used for controlling the electronic switch circuit to be switched on when countdown in the system is finished; the external wake-up circuit is electrically connected with the electronic switch circuit and is used for receiving an external interrupt signal and controlling the electronic switch circuit to be switched on according to the external interrupt signal; the key awakening circuit is electrically connected with the electronic switch circuit and used for controlling the electronic switch circuit to be switched on when the key is pressed down.
Further, the electronic switch circuit comprises a diode D3, a diode D4, a diode D5, a diode D6, a switch tube Q4, a transistor Q5, a transistor Q6, a transistor Q7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R24 and a resistor R25;
the anode of the diode D3 is electrically connected with the output end of the external wake-up circuit and is used for accessing a second wake-up signal; the anode of the diode D4 is electrically connected with the output end of the clock wake-up circuit and is used for accessing a first wake-up signal; the cathode of the diode D3 and the cathode of the diode D4 are electrically connected with the anodes of the diode D5 and the diode D6; one ends of the resistor R24 and the capacitor C13 are grounded, and the other ends of the resistor R24 and the capacitor C13 are connected between the anodes of the diode D5 and the diode D6 and the cathodes of the diode D3 and the diode D4; the anodes of the diode D5 and the diode D6 are electrically connected with the output end of the external key wake-up circuit and are used for accessing a third wake-up signal;
the cathode of the diode D5 is electrically connected with the base of the triode Q6 through the resistor R20, the emitter of the triode Q6 is grounded, and the collector of the triode Q6 is electrically connected with the source of the switch tube Q4 through the resistor R19; one end of the resistor R21 is grounded, and the other end is connected between the resistor R20 and the base electrode of the triode Q6;
the cathode of the diode D6 is electrically connected with the base of the triode Q7 through the resistor R23, the emitter of the triode Q7 is grounded, and the collector of the triode Q7 is electrically connected with the drain of the switch tube Q4 through the resistor R17; one end of the resistor R25 is grounded, and the other end is connected between the resistor R23 and the base electrode of the triode Q7;
one ends of the resistor R22 and the capacitor C12 are grounded, and the other ends of the resistor R22 and the capacitor C12 are connected between the base electrodes of the triode Q7 and the triode Q5; the base electrode of the triode Q5 is connected between the resistor R17 and the collector electrode of the triode Q7, the emitter electrode is grounded, and the collector electrode is electrically connected with the drain electrode of the switching tube Q4 through the resistor R18;
one ends of the capacitor C10 and the capacitor C11 are grounded, and the other ends of the capacitor C10 and the capacitor C11 are electrically connected with the drain electrode of the switching tube Q4;
one end of the capacitor C8 is grounded, and the other end is electrically connected with the grid of the switch tube Q4; one end of each of the capacitor C9 and the resistor R16 is connected between the resistor R19 and the source electrode of the switching tube Q4, and the other end of each of the capacitor C9 and the resistor R16 is electrically connected with the gate electrode of the switching tube Q4;
the grid electrode of the switching tube Q4 is electrically connected with a power supply VABT, and the drain electrode of the switching tube Q4 supplies power to a power supply VCC _ SYS of the equipment output equipment;
when the first wake-up signal is at a high level or the second wake-up signal is at a high level, a signal VSYS _ EN output by the diode D3 or the diode D4 is at a high level, the triode Q6 is conducted with the triode Q7, the switch tube Q4 is conducted, the device is connected to a device power supply VCC _ SYS and enters a normal working state; when the third wake-up signal is at a high level, the transistor Q6 is connected to the transistor Q7, the switch transistor Q4 is connected, and the device is connected to the device power supply VCC _ SYS and enters a normal operating state.
Further, the switching tube Q4 is a field effect transistor, and its model is SI2305 CDS.
Further, the external wake-up circuit comprises a capacitor C7, a resistor R12, a resistor R13, a resistor R14, a resistor R15 and a triode Q3; the base electrode of the triode Q3 is connected with an external interrupt signal through a resistor R13, and the emitter electrode is connected with a power supply VBAT; the collector of the triode Q3 is electrically connected with the anode of the diode D3 of the electronic switch circuit and is used for inputting a second wake-up signal to the electronic switch circuit;
the collector electrode of the triode Q3 is also electrically connected with the main control MCU through a resistor R14 and is used for inputting a fourth control signal to the main control MCU;
one ends of the capacitor C7 and the resistor R15 are grounded, and the other ends of the capacitor C7 and the resistor R15 are electrically connected with the resistor R14;
one end of the resistor R12 is connected between the resistor R13 and the base electrode of the triode Q3, and the other end of the resistor R12 is electrically connected with the emitting electrode of the triode Q3;
when the external interrupt signal is at a high level, the triode Q3 is cut off, and a second wake-up signal output by the output end of the external wake-up circuit is at a low level; at this time, the output signal VSYS _ EN of the diode D3 of the electronic switch circuit is at a low level, the triode Q6 and the triode Q7 are cut off, and the switch tube Q4 is turned off;
when the external interrupt signal is at a low level, the triode Q3 is turned on, and a second wake-up signal output by the output end of the external wake-up circuit is at a high level; at this time, the output signal VSYS _ EN of the diode D3 of the electronic switch circuit is at a high level, the transistor Q6 and the transistor Q7 are turned on, and the switch Q4 is turned on.
Further, the clock wake-up circuit comprises a clock chip U1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C8, a resistor R2, a resistor R3, a resistor R5, a resistor R8, a resistor R10, a resistor R11, a triode Q2 and a spare button battery BT 1; a port 3 of the clock chip U1 is connected to a power supply VBAT, the port 3 is grounded through a capacitor C3 and a capacitor C4, a port 4 is suspended, a port 5 is grounded through a capacitor C5, the port 5 is grounded through a standby button battery BT1, a port 6 is grounded, a port 2 is suspended, a port 8 is electrically connected with a main control MCU of the equipment through a resistor R2, a port 1 is electrically connected with the main control MCU of the equipment through a resistor R3, and a port 7 is electrically connected with a base of a triode Q2 through a resistor R8;
an emitter of the triode Q2 is connected with a power supply VBAT; one end of the resistor R5 is connected between a power supply VBAT and an emitter of the triode Q2, and the other end of the resistor R8 is connected between a base of the triode Q2; the collector of the triode Q2 is electrically connected with a diode D4 of the electronic switch circuit and is used for inputting a first wake-up signal to the electronic switch circuit;
the collector of the triode Q2 is electrically connected with the main control MCU through a resistor R10 and is used for accessing a first control signal; one end of the resistor R11 is grounded, and the other end is electrically connected with the resistor R10; one end of the capacitor C8 is grounded, and the other end is electrically connected with the resistor R10;
when the clock chip U1 detects that the countdown is finished, the port 7 of the clock chip U1 outputs a high level, the triode Q2 is conducted, and a first wake-up signal output by the output end of the clock wake-up circuit is at the high level; at this time, the signal VSYS _ EN output from the negative electrode of the diode D4 of the electronic switch circuit is at a high level, the transistor Q6 and the transistor Q7 are turned on, and the switch Q4 is turned on.
Further, the key wake-up circuit comprises a resistor R1, a resistor R4, a resistor R6, a resistor R7, a resistor R9, a triode Q1, a diode D1, a diode D2, a key SW1, a capacitor C1, a capacitor C2 and a diode ESD 1; the collector of the triode Q1 is connected to a power supply VCC _ MCU collector of the main control MCU through a resistor R1 and electrically connected with the main control MCU, and is used for outputting a second control signal to the main control MCU; the emitter of the triode Q1 is grounded, and the base is electrically connected with the anode of the diode D1 through the resistor R6;
the cathode of the diode D1 outputs a third wake-up signal;
the anode of the diode D2 is electrically connected with the main control MCU and is used for accessing a third control signal; the cathode of the diode D2 outputs a third wake-up signal;
one end of the resistor R9 is grounded, and the other end is electrically connected with the anode of the diode D2; one end of the resistor R7 is grounded, and the other end is connected between the resistor R6 and the base electrode of the triode Q1;
the port 3 of the key SW1 is grounded, the port 4 is grounded, the port 2 is connected to the power module, and the port 1 is electrically connected with the anode of the diode D1;
one end of the capacitor C1 is grounded, and the other end is electrically connected with the port 2 of the key SW 1; one end of the capacitor C2 is grounded, and the other end is electrically connected with the port 1 of the key SW 1; one end of the diode ESD1 is grounded, and the other end is electrically connected with the port 1 of the key SW 1;
when the key SW1 is not pressed, the third wake-up signal output by the output end of the key wake-up circuit is at a low level, the triode Q6 and the triode Q7 in the electronic switch circuit are both cut off, the switch tube Q4 is cut off, and the device is powered off and enters a standby state;
when the key SW1 is pressed, a third wake-up signal output by the output end of the key wake-up circuit is at a high level, the triode Q6 and the triode Q7 of the electronic switch circuit are switched on, the switch tube Q4 is switched on, and the equipment is connected to the equipment power supply VCC _ SYS and enters a normal working state.
Furthermore, the device also comprises a voltage reduction circuit; the input end of the voltage reduction circuit is electrically connected with the power supply through the electronic switch circuit, and the output end of the voltage reduction circuit is electrically connected with the master control MCU, so that when the electronic switch circuit is switched on, the equipment power supply is converted into the master control MCU power supply.
Further, the voltage reduction circuit comprises a chip U2, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, a resistor R26, a resistor R27, a resistor R28 and an inductor L1;
a port 4 of the chip U2 is connected with a device power supply VCC _ SYS, a port 2 is grounded, a port 1 is connected with a third wake-up signal VSYS _ EN through a resistor R26, the port 1 is grounded through a capacitor C19, and a port 5 is grounded through a resistor R28; a port 3 of the chip U2 outputs a main control MCU power supply VCC _ MCU through an inductor L1;
one ends of the capacitor C16 and the capacitor C18 are grounded, and the other ends of the capacitor C16 and the capacitor C18 are electrically connected with the port 4 of the chip U2;
one end of the capacitor C14 is electrically connected with the port 3 of the chip U3 through the inductor L1, and the other end is grounded through the resistor R28;
one end of the resistor R27 is electrically connected with the port 3 of the chip U3 through the inductor L1, and the other end is grounded through the resistor R28;
one ends of the capacitor C15 and the capacitor C17 are grounded, and the other ends of the capacitor C15 and the capacitor C17 are electrically connected with the port 3 of the chip U3 through the inductor L1;
when the third wake-up signal is at a high level, the port 1 of the chip U2 is at a high level, the chip U2 converts the device power supply VCC _ SYS into a main control MCU power supply VCC _ MCU, and the main control MCU switches on the power supply and enters a normal working state;
when the third wake-up signal is at a low level, the chip U2 does not operate, and the master control MCU does not operate when the power is turned off.
Further, when the device is in a standby state, the key SW1 is pressed, and the second control signal obtained by the main control MCU is at a high level, the main control MCU and the device enter a normal operating state, and the third control signal is set to a high level by the main control MCU; then when the key SW1 is released, the main control MCU and the equipment are still in a normal working state;
when the device and the master control MCU are both in a working state, the key SW1 is pressed down, and the master control MCU receives the second control signal and sets the third control signal to be a low level, then after the key SW1 is released, the triode Q1 is cut off, the third wake-up signal is a low level, the switching tube Q4 of the electronic switching circuit is cut off, the device is powered off, and the device enters a standby state; meanwhile, the voltage reduction circuit does not work, and the master control MCU is powered off and does not work. The second purpose of the invention is realized by adopting the following technical scheme:
a low-power consumption equipment control system comprises system equipment, a main control MCU of the system equipment, a system power supply and a low-power consumption electronic switch device adopted as one of the purposes of the invention; the input end of the low-power consumption electronic switch device is electrically connected with a system power supply, the first output end of the low-power consumption electronic switch device is electrically connected with system equipment, and the second output end of the low-power consumption electronic switch device is electrically connected with a master control MCU; and the low-power-consumption electronic switch device is used for controlling the on-off of the system power supply and the system equipment and the system power supply and the master control MCU so as to realize the switching between the standby state and the normal working state of the system equipment and the master control MCU.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the electronic switch circuit is arranged between the power supply and the equipment and between the power supply and the main control MCU of the equipment, and the on-off of the power supply and the equipment and the on-off of the main control MCU of the power supply and the equipment are controlled through the electronic switch circuit, so that the standby state and the normal working state of the equipment and the main control MCU are switched; when the system is in a standby state, because the power supply current in the whole system is only the current in the electronic switch circuit, the current is very small, and the power consumption of the system is greatly reduced; meanwhile, in a standby state, because the main control MCU of the equipment is completely in a power-off state, the main control MCU does not need to work all the time, the service life of the main control MCU of the equipment is prolonged, and the problem that the main control MCU of the equipment is difficult to awaken due to the fact that the main control MCU of the equipment enters a low power consumption state or a sleep state is solved. Meanwhile, the invention is realized by adopting a pure hardware circuit, has simple circuit structure and short product debugging period, and can ensure that the product can quickly enter the market. The invention also provides a plurality of awakening modes, so that the system enters a normal working state from a standby state, the operation of a user is convenient, and different application requirements are met.
Drawings
FIG. 1 is a schematic diagram of the connection of a low power consumption electronic switch, a system power supply, a device and a main control MCU provided by the present invention;
FIG. 2 is a circuit schematic of the electronic switching circuit of FIG. 1;
FIG. 3 is a circuit diagram of the clock wake-up circuit of FIG. 1;
FIG. 4 is a circuit diagram of the external wake-up circuit of FIG. 1;
FIG. 5 is a circuit diagram of the key wake-up circuit of FIG. 1;
fig. 6 is a circuit diagram of the voltage step-down circuit in fig. 1.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
According to the invention, the electronic switch device is arranged between the equipment and the system power supply to control the on-off of the equipment and the power supply, so that the equipment is switched between a standby state and a normal working state. That is, when the electronic switching device is turned on, the power source is turned on with the equipment, so that the power source is supplied to the equipment, and the equipment enters a normal working state; when the electronic switching device is switched off, the apparatus is powered off and enters a standby state.
Preferably, the present invention provides a preferred embodiment, a low power electronic switching device, as shown in fig. 1 to 6, comprising an electronic switching circuit, a clock wake-up circuit, an external wake-up circuit and a key wake-up circuit.
The input end of the electronic switch circuit is electrically connected with the power supply, the first output end outputs the power supply of the equipment, and the second output end outputs the power supply of the main control MCU. The power supply here refers to a power supply device external to the electronic switching device. Similarly, the following devices are also external to the electronic switching device.
And the equipment power supply is a power supply of the equipment. That is, the first output terminal of the electronic switch circuit is electrically connected to the device, and is used for providing the power supply of the device to the device when the electronic switch circuit is switched on, so as to ensure that the device enters a normal working state.
Similarly, the master MCU power supply is the power supply of the master MCU of the device. That is, the second output terminal of the electronic switch circuit is electrically connected with the main control MCU of the device, and is used for providing the power supply of the device to the main control MCU of the device when the electronic switch circuit is turned on, so as to ensure that the main control MCU of the device enters a normal working state.
Obviously, as can be seen from the above, when the device enters the standby state, the main control MCU is in the power-off state, and the device is also in the power-off state, and at this time, the power supply current of the whole system is only the low-power electronic switching device, which can greatly reduce the power consumption of the system; meanwhile, the master control MCU does not need to work all the time, and the service life of the master control MCU is prolonged. In addition, when the device enters a standby state, the main control MCU is in a complete power-off state, so that the device cannot enter a low power consumption state or a sleep state. Therefore, when the equipment enters a normal working state, the main control MCU is directly electrified and restarted, and the equipment cannot enter a dead halt state. The system in this embodiment refers to the entire system including the electronic switching device, the equipment, and the power supply.
Meanwhile, in terms of product design, the standby power consumption of the main control MCU does not need to be debugged and optimized, so that the research and development period of the product is shortened, and the product can quickly enter the market.
Further, the embodiment provides three wake-up modes to wake up the system from the standby state to the normal operating state, which is specifically as follows:
a clock wake-up mode: by setting the countdown time, when the low-power electronic switching device detects that the countdown is finished, the device is connected with the power supply, and the system enters a normal working state. Specifically, the output end of the clock wake-up circuit is electrically connected with the electronic switch circuit and used for sending a first wake-up signal to the electronic switch circuit so as to control the on-off of the electronic switch circuit and further realize the power-on control of the equipment. Such as: when the clock wake-up circuit detects that the countdown is finished, the electronic switch circuit is controlled to be switched on, and the equipment is powered on to enter a normal working mode.
External interrupt wake-up mode: when an external interrupt signal is received, the equipment is connected with a power supply, and the equipment enters a normal working state. Specifically, the output end of the external wake-up circuit is electrically connected with the electronic switch circuit and is used for inputting a second wake-up signal to the electronic switch circuit so as to control the on-off of the electronic switch circuit and further control the on-off of the power supply of the equipment.
The key wake-up mode is as follows: the key is used for controlling the connection of the equipment and the power supply, and the system enters a normal working state. Specifically, the key wake-up circuit is electrically connected with the electronic switch circuit and used for inputting a third wake-up signal to the electronic switch circuit so as to control the on-off of the electronic switch circuit and further control the on-off of the power supply of the equipment.
The three wake-up modes provided in this embodiment are all independently operated and do not affect each other. For example, when the countdown does not reach the set time, if an external interrupt signal is received or a key is pressed, the system can be awakened. Similarly, when the external interrupt signal is not received or the key is not pressed, the system wakes up to enter the normal working state when the countdown is finished. That is, when the system is in a standby state and the system meets the wake-up condition of any one of the three wake-up modes, the system can enter a normal working state.
Specifically, as shown in fig. 2, the electronic switch circuit includes a diode D3, a diode D4, a diode D5, a diode D6, a switch Q4, a transistor Q5, a transistor Q6, a transistor Q7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R24, and a resistor R25.
The anode of the diode D3 is electrically connected to the output terminal of the external WAKE-UP circuit, and is used for receiving the second WAKE-UP signal WAKE _ UP _ VSYS _ EN.
The anode of the diode D4 is electrically connected to the output terminal of the clock wake-up circuit, and is used for accessing the first wake-up signal RTC _ VSYS _ EN.
The cathode of the diode D3 and the cathode of the diode D4 are electrically connected to the anodes of the diode D5 and the diode D6. One ends of the resistor R24 and the capacitor C13 are grounded, and the other ends of the resistor R24 and the capacitor C13 are connected between the anodes of the diode D5 and the diode D6 and the cathodes of the diode D3 and the diode D4.
The cathode of the diode D5 is electrically connected with the base of the triode Q6 through the resistor R20, the emitter of the triode Q6 is grounded, and the collector of the triode Q6 is electrically connected with the source of the switch tube Q4 through the resistor R19; one end of the resistor R21 is grounded, and the other end is connected between the resistor R20 and the base of the triode Q6.
The cathode of the diode D6 is electrically connected with the base of the triode Q7 through the resistor R23, the emitter of the triode Q7 is grounded, and the collector of the triode Q7 is electrically connected with the drain of the switch tube Q4 through the resistor R17; one end of the resistor R25 is grounded, and the other end is connected between the resistor R23 and the base of the triode Q7.
One ends of the resistor R22 and the capacitor C12 are grounded, and the other ends are connected between the base electrodes of the triode Q7 and the triode Q5. The base of the triode Q5 is connected between the resistor R17 and the collector of the triode Q7, the emitter is grounded, and the collector is electrically connected with the drain of the switching tube Q4 through the resistor R18.
One end of each of the capacitor C10 and the capacitor C11 is grounded, and the other end is electrically connected to the drain of the switching tube Q4.
One end of the capacitor C8 is grounded, and the other end is electrically connected to the gate of the switch Q4. One end of each of the capacitor C9 and the resistor R16 is connected between the resistor R19 and the source of the switching tube Q4, and the other end is electrically connected to the gate of the switching tube Q4.
The gate of the switching tube Q4 is electrically connected to the power supply VABT, and the drain thereof supplies power VCC _ SYS to the device output device.
When the first wake-up signal RTC _ VSYS _ EN is at a high level, the diode D4 is conducted, the negative electrode output signal VSYS _ EN of the diode D4 is at a high level, the triode Q6 and the triode Q7 are both conducted, the switch tube Q4 is conducted, the equipment is connected to the power supply VCC _ SYS of the equipment, and the equipment enters a normal working state.
Similarly, when the second WAKE-UP signal WAKE _ UP _ VSYS _ EN is at a high level, the diode D3 is turned on, the negative output signal VSYS _ EN of the diode D3 is at a high level, the triode Q6 and the triode Q7 are both turned on, the triode Q4 is turned on, the device is connected to the device power supply VCC _ SYS, and the device enters a normal working state.
Because the diode D3 and the diode D4 are connected in parallel, no matter whether the wake-up signal accessed by the anode of the diode D3 is at a high level or the wake-up signal accessed by the anode of the diode D4 is at a high level, the signal VSYS _ EN is at a high level, the triode Q6 and the triode Q7 are both turned on, the switch tube Q4 is turned on, the device is connected to the device power supply VCC _ SYS, and the device enters a normal working state. That is, the clock wake-up mode and the external wake-up mode cannot be influenced mutually, and the low-power electronic switching device can enter the equipment from the standby state to the normal working state when meeting any condition.
More specifically, the diode D3 and the diode D4 are both of the same type and are each BAT 54C. The diode D5 and the diode D6 are both of the same type and are BAT 54A. The types of the triode Q5, the triode Q6 and the triode Q7 are S8050.
More specifically, the switching tube Q4 of the present embodiment is a field effect transistor, with the model SI2305CDS, the maximum current of which is-4.3A, and the maximum withstand voltage of which is-8V, which satisfies the current maximum battery voltage of 4.35V on the market. The invention adopts the switch tube to realize the on-off of the equipment and the power supply, thereby realizing the mode switching of the system, having simple control logic and shorter production period and being beneficial to the product to quickly enter the market.
In addition, when the system is in a standby state, because the electronic switch circuit is disconnected with the power supply module, the current supplied to the equipment of the system is almost zero, and at the moment, the standby current of the whole system only controls the current of the electronic switch circuit, and the current is very small, so that the power consumption of the system is greatly reduced.
Preferably, the power source in this embodiment may be a lithium battery.
Further, as shown in fig. 3, the clock wake-up circuit includes a clock chip U1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C8, a resistor R2, a resistor R3, a resistor R5, a resistor R8, a resistor R10, a resistor R11, a transistor Q2, and a spare button battery BT 1.
The port 3 of the clock chip U1 is connected to a power supply VBAT, the port 3 is connected to a ground through a capacitor C3, the capacitor C4 is grounded and filtered, the port 4 is suspended, the port 5 is grounded through a capacitor C5, the port 5 is grounded through a BT1, the port 6 is grounded, the port 2 is suspended, the port 8 is connected to a main control MCU power supply VCC _ MCU through a resistor R2, the port 1 is connected to the main control MCU power supply VCC _ MCU through a resistor R3, and the port 7 is electrically connected to the base of the triode Q2 through a resistor R8.
The emitter of transistor Q2 is coupled to a power supply VBAT. One end of the resistor R5 is connected between the power supply VBAT and the emitter of the triode Q2, and the other end is connected between the resistor R8 and the base of the triode Q2.
The collector of the transistor Q2 is electrically connected to the anode of the diode D4 of the electronic switching circuit.
The collector of the triode Q2 is electrically connected to the main control MCU through a resistor R10, and is used for inputting a first control signal MCU _ RTC _ DET to the main control MCU. The main control MCU detects whether the current system power supply is switched on or off through the clock wake-up circuit through the first control signal MCU _ RTC _ DET.
One end of the resistor R11 is grounded, and the other end is electrically connected with the resistor R10. One end of the capacitor C8 is grounded, and the other end is electrically connected to the resistor R10. The resistor R10 and the resistor R11 function as voltage division.
When the clock chip U1 detects that the countdown is finished, a signal RTC _ INT output by a port 7 of the clock chip U1 is at a high level, the triode Q2 is conducted, and a first wake-up signal RTC _ VSYS _ EN output by the output end of the clock wake-up circuit is at a high level; at this time, a signal VSYS _ EN output by the cathode of the diode D4 of the electronic switch circuit is at a high level, the triode Q6 and the triode Q7 are both switched on, the switch tube Q4 is switched on, and the device is connected to the device power supply VCC _ SYS and enters a normal working state.
In addition, the master MCU also sends an I2C signal to the port 8 and the port 1 of the chip U1 through the resistor R2 and the resistor R3 to set the operation mode of the chip U1, such as the countdown time. When the countdown of the chip U1 is over, the chip U1 outputs a high through the port 7, so that the transistor Q2 is turned on and outputs a high RTC _ VSYS _ EN. In addition, the embodiment is also provided with a spare button battery BT1 to supply power to the chip U1, so that the chip U1 can still be in a normal working state when an external power supply is unavailable.
Specifically, in the present embodiment, a clock chip U1 is adopted as a real-time clock chip, which is SD3078, has a power consumption of 0.8 μ a, and typically has a VBAT of 3.0V, a Ta of 25 ℃, a working voltage of 2.7V to 5.5V, a working temperature of-40 ℃ to +85 ℃, a minimum timing of 244us, and a maximum timing of 31 years; meanwhile, a more accurate millisecond-level timing value can be obtained through calculation; a crystal oscillator and a resonant capacitor are arranged in the chip, and a high-precision timing function in a wide temperature range is realized by a high-precision compensation method, wherein the precision at 25 ℃ is less than +/-3.8 ppm; the voltage detection circuit has a one-time or charging backup battery input pin VBAT, a 3.3V voltage-stabilizing charging circuit in the backup battery input pin VBAT can selectively carry out automatic charging and built-in battery voltage detection functions on an external rechargeable battery, can read the current battery voltage value (three-bit effective number), set a high-low battery alarm voltage value and output interruption from an INT pin; standard I2C bus interface mode, top speed 400 KHz.
Specifically, the spare button cell BT1 is model CR 2032. The model of the triode Q2 is S8550.
More specifically, as shown in fig. 4, the external wake-up circuit includes a capacitor C7, a resistor R12, a resistor R13, a resistor R14, a resistor R15, and a triode Q3.
The base of the triode Q3 is connected to an external interrupt signal WAKE _ UP through a resistor R13, the emitter is connected to the power module, and the collector outputs a second WAKE-UP signal WAKE _ UP _ VSYS _ EN. The external interrupt signal WAKE _ UP in this embodiment may be an interrupt signal sent by any external device.
The collector of the triode Q3 is also electrically connected to the main control MCU through a resistor R14, and is configured to output a fourth control signal WAKE _ UP _ DET to the main control MCU. The main control MCU may detect whether the current turning-on or turning-off of the system power is caused by an external interrupt according to the fourth control signal WAKE _ UP _ DET. One end of the capacitor C7 and one end of the resistor R15 are both grounded, and the other end of the capacitor C7 and the other end of the resistor R15 are both electrically connected with the resistor R14.
One end of the resistor R12 is connected between the resistor R13 and the base of the triode Q3, and the other end is electrically connected with the emitter of the triode Q3.
The external wake-up circuit is connected with a power supply VBAT to ensure the normal work of the external wake-up circuit.
And the external WAKE-UP circuit controls the on and off of the triode Q3 by receiving the external interrupt signal WAKE _ UP, and further controls the transmission of a second WAKE-UP signal WAKE _ UP _ VSYS _ EN to the electronic switch circuit, and further controls the on and off of a switch tube Q4 in the electronic switch circuit.
Specifically, when the external interrupt signal WAKE _ UP is at a high level, the transistor Q3 is turned off, the transistor R15 is grounded, and the second WAKE signal WAKE _ UP _ VSYS _ EN output by the output terminal of the external WAKE-UP circuit is at a low level. That is, the signal VSYS _ EN output from the negative electrode of the diode D3 of the electronic switch circuit is at a low level, the transistor Q6 and the transistor Q7 are turned off, the transistor Q4 is turned off, the power VBAT is not connected to the device, and the system is in a standby state. Meanwhile, the main control MCU module obtains that the fourth control signal WAKE _ UP _ DET is at a low level to know that the external WAKE-UP circuit is not activated.
Conversely, when the external interrupt signal WAKE _ UP is at a low level, the transistor Q3 is turned on, and the second WAKE-UP signal WAKE _ UP _ VSYS _ EN output by the output terminal of the external WAKE-UP circuit is at a high level; at this time, the output signal VSYS _ EN of the diode D3 of the electronic switch circuit is at a high level, the transistor Q6 and the transistor Q7 are turned on, the switch Q4 is turned on, the power VBAT is turned on with the device to supply power to the device, and the device enters a normal operating state. At this time, the main control MCU obtains that the fourth control signal WAKE _ UP _ DET is at a high level, and then the external WAKE-UP circuit is considered to be started, and the power of the device is controlled by the external WAKE-UP circuit.
In addition, when the electronic switch circuit is disconnected, the power supply cannot provide the device power supply VCC _ SYS to the device through the low-power electronic switch device, and similarly, the device cannot provide the main control MCU power supply VCC _ MCU to the main control MCU through the low-power electronic switch device, and the main control MCU is disconnected and does not work at this time.
Specifically, the transistor Q3 has a model number S8550.
Further, as shown in fig. 5, the key wake-up circuit includes a resistor R1, a resistor R4, a resistor R6, a resistor R7, a resistor R9, a transistor Q1, a diode D1, a diode D2, a key SW1, a capacitor C1, a capacitor C2, and a diode ESD 1.
And the collector of the triode Q1 is connected to the power supply VCC _ MCU of the main control MCU through a resistor R1, and the collector is electrically connected with the main control MCU and used for inputting a second control signal MCU _ PWR _ KEY to the main control MCU. The emitter of the transistor Q1 is grounded, and the base is electrically connected to the anode of the diode D1 through the resistor R6.
The cathode of the diode D1 outputs a third wake-up signal VSYS _ EN.
The anode of the diode D2 is electrically connected to the main control MCU and is used for accessing a third control signal MCU _ PWR _ HOLD; the cathode of the diode D1 outputs a third wake-up signal VSYS _ EN.
The cathodes of the diode D1 and the diode D2 and the anodes of the diode D5 and the diode D6 of the electronic switch circuit are further used for inputting a third wake-up signal to the diode D5 and the diode D6 of the electronic switch circuit to control the on and off of the triode Q6 and the triode Q7, and further control the on and off of the switch Q4.
The diode D1 is connected in parallel with the diode D2 to form an or gate circuit. That is, the third wake-up signal VSYS _ EN is high when only one of the two control signals is high. The diode D1 is of the same type as the diode D2 and is BAT 54C.
One end of the resistor R9 is grounded, and the other end is electrically connected with the anode of the diode D2. One end of the resistor R7 is grounded, and the other end is connected between the resistor R6 and the base of the triode Q1.
The switch SW1 has a ground port 3, a ground port 4, a power module connected to the port 2, and a diode D1 connected to the port 1.
One end of the capacitor C1 is grounded, and the other end is electrically connected to the port 2 of the button SW 1. One end of the capacitor C2 is grounded, and the other end is electrically connected to port 1 of the button SW 1. One end of the diode ESD1 is grounded, and the other end is electrically connected to the port 1 of the key SW 1.
When the key SW1 is not pressed, since the R7 is grounded, the third wake-up signal VSYS _ EN output by the output terminal of the switch key circuit is at a low level, the triode Q6 and the triode Q7 in the electronic switch circuit are both turned off, the switch tube Q4 is turned off, the power supply is disconnected from the device, and the device enters a standby state.
When the key SW1 is pressed, the power VBAT is transmitted to the diode D1 through the key SW1, and the third wake-up signal VSYS _ EN output by the cathode of the diode D12 is at a high level; at this time, the transistor Q6 and the transistor Q7 of the electronic switching circuit are turned on, the switching tube Q4 is turned on, the power supply is turned on, and the device enters a normal operating state.
In addition, in order to ensure that the power of the device is cut off after the KEY SW1 is pressed and released, in this embodiment, when the KEY SW1 is pressed, the main control MCU detects that the first control signal MCU _ PWR _ KEY is at a high level, and the output third wake-up signal VSYS _ EN is at a high level; at this time, configuring a second control signal MCU _ PWR _ HOLD to be a high level through a main control MCU; thus, after the key SW1 is released, through an or gate circuit formed by the diode D1 and the diode D2, when the second control signal MCU _ PWR _ HOLD is at a high level, the third wake-up signal VSYS _ EN at the output terminal of the switch key control circuit is still at a high level, and the main control MCU and the device are still in a power-on state and still in a normal working state; that is, the level state of the MCU _ PWR _ KEY of the first control signal does not affect the third wake-up signal VSYS _ EN, and thus, the power on/off KEY may also be used as other function KEYs. For example, when the power on/off KEY is set to be a volume adjustment KEY, when the KEY SW1 is pressed, the main control MCU may obtain the pressed state of the SW1 according to the level state of the first control signal MCU _ PWR _ KEY, which may be used for volume adjustment.
That is, after the KEY SW1 is pressed, the main control MCU may configure the second control signal MCU _ PWR _ HOLD through the first control signal MCU _ PWR _ KEY, so that after the KEY SW1 is released, the diode D2 makes the signal VSYS _ EN output by the KEY wake-up circuit continuously be at a high level, and at this time, the switch tube Q4 of the electronic switch KEY is still turned on, and the device is still in a power supply state. At this time, the key SW1 may be used for other functions.
Similarly, when the device and the main control MCU are in working states, when the KEY SW1 is pressed, and the main control MCU obtains the first control signal MCU _ PWR _ KEY as high level, the second control signal MCU _ PWR _ HOLD is set as low level; thus, after the key SW1 is released, the input terminal of the diode D2 is low due to the second control signal MCU _ PWR _ HOLD being low, and the input terminal of the diode D1 is low due to the key SW1 being released; that is, the positive electrode of the diode D1 and the positive electrode of the diode D2 are both at a low level, the third wake-up signal VSYS _ EN output by the external key circuit is at a low level, the switch tube Q4 of the electronic switch circuit is turned off, and the device is in a power-off state.
Specifically, the model of the transistor Q1 is S8050. Diode ED1 is model ESD 5451N.
Further, the low-power consumption electronic switching device also comprises a voltage reduction circuit. The input end of the voltage reduction circuit is electrically connected with the power supply through the electronic switch circuit and is used for being connected with a power supply VCC _ SYS of the equipment. The output end of the voltage reduction circuit is electrically connected with the master control MCU and used for providing a power supply VCC _ MCU for the master control MCU. Namely, the voltage reduction circuit is used for converting the equipment power supply VCC _ SYS into a master control MCU power supply VCC _ MCU used by the master control MCU.
More specifically, as shown in fig. 6, the voltage reduction circuit includes a chip U2, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, a resistor R26, a resistor R27, a resistor R28, and an inductor L1.
A port 4 of the chip U2 is connected with a device power supply VCC _ SYS, a port 2 is grounded, a port 1 is connected with a third wake-up signal VSYS _ EN through a resistor R26, the port 1 is grounded through a capacitor C19, and a port 5 is grounded through a resistor R28; a port 3 of the chip U2 outputs a main control MCU power supply VCC _ MCU through an inductor L1;
one ends of the capacitor C16 and the capacitor C18 are grounded, and the other ends of the capacitor C16 and the capacitor C18 are electrically connected with the port 4 of the chip U2;
one end of the capacitor C14 is electrically connected with the port 3 of the chip U3 through the inductor L1, and the other end is grounded through the resistor R28;
one end of the resistor R27 is electrically connected with the port 3 of the chip U3 through the inductor L1, and the other end is grounded through the resistor R28;
one ends of the capacitor C15 and the capacitor C17 are grounded, and the other ends of the capacitor C15 and the capacitor C17 are electrically connected with the port 3 of the chip U3 through the inductor L1, so that a filtering effect is achieved.
More specifically, the model of the chip U2 is SY8088 AAC.
When the third wake-up signal VSYS _ EN is at a high level, a port 1 of the chip U2 is at a high level, the chip U2 converts the device power supply VCC _ SYS into a main control MCU power supply VCC _ MCU, and the main control MCU is powered on and enters a normal operating mode; on the contrary, when the third wake-up signal VSYS _ EN is at a low level, the port 1 of the chip U2 is at a low level, the chip U2 does not work, and the master control MCU is powered off and does not work. According to the invention, the electronic switch circuit consisting of the field effect transistor and the peripheral circuit is arranged between the equipment and the power supply, and the corresponding wake-up circuit is arranged to control the on and off of the field effect transistor so as to realize the on and off of the equipment and the power supply, thereby realizing the switching between the standby state and the normal working state of the equipment. Namely: when the field effect tube is switched off, the equipment is not switched on with a power supply, the equipment is in a standby state, the current for the equipment is almost 0 at the moment, namely, the standby current of the whole equipment only controls the current of the field effect tube, the current is only 2 uA-5 uA, and the current is very small, so that the whole system is in a low power consumption state; meanwhile, the master control MCU is also in a complete power-off state, so that the master control MCU does not need to be in a working state for a long time, and the service life of the master control MCU can be prolonged. When the device needs to be awakened, the field effect transistor can be controlled to be connected through the awakening circuit, so that the power supply is connected with the device and provides power for the device, meanwhile, the voltage reduction circuit starts to work and provides power for the main control MCU, the device enters a normal working state at the moment, and the main control MCU also enters a normal working state. The invention realizes the system standby and awakening by adopting a pure circuit mode, increases the reliability of the system, simultaneously, does not need to adjust and optimize the standby power consumption of the main control MCU for product design, shortens the research and development period and enables the product to rapidly enter the market.
The invention can not only avoid the problem that the service life of the main control MCU is shortened when the main control MCU is always in a working state, but also avoid the problem that the main control MCU enters a halt state after entering a low power consumption state after working for a long time. Meanwhile, the invention does not need to change the control logic of the master control MCU, so that a special master control MCU does not need to be selected, and the selection of a supply chain is more diversified for manufacturers.
More specifically, when the power is the lithium battery, the main control MCU is electrically connected with the power and used for detecting the electric quantity of the battery and monitoring the real-time electric quantity of the power when the peripheral is in a normal working state so as to take corresponding measures in the following.
Based on the low-power-consumption electronic switching device provided by the invention, the invention also provides a low-power-consumption equipment control system, which comprises the low-power-consumption electronic switching device, a system power supply, system equipment and a main control MCU of the system equipment. The input end of the low-power consumption electronic switch is electrically connected with the system power supply, the first output end of the low-power consumption electronic switch is electrically connected with the system equipment, and the second output end of the low-power consumption electronic switch is electrically connected with the main control MCU.
On-off control of system equipment and a system power supply and on-off control of a master control MCU and the system power supply are realized through a low-power-consumption electronic switch device, and switching of the system from a standby state to a normal working state is realized; meanwhile, when the system is in a standby state, because the system equipment and the master control MCU are powered off, the power supply current of the whole system is only the power supply current in the low-power-consumption electronic switching device, the power supply current is small, and the overall power consumption of the system is greatly reduced.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (10)

1. A low-power consumption electronic switch device is characterized by comprising an electronic switch circuit, a clock wake-up circuit, an external wake-up circuit and a key wake-up circuit; the first input end of the electronic switch circuit is electrically connected with an external power supply, the first output end outputs a device power supply, and the second output end outputs a master control MCU power supply; the clock wake-up circuit, the external wake-up circuit and the key wake-up circuit are respectively electrically connected with the electronic switch circuit and are used for controlling the on-off of the electronic switch circuit so as to control the on-off of the power supply and the equipment and the on-off of the power supply and the main control MCU of the equipment;
the clock wake-up circuit is electrically connected with the electronic switch circuit and is used for controlling the electronic switch circuit to be switched on when countdown in the system is finished; the external wake-up circuit is electrically connected with the electronic switch circuit and is used for receiving an external interrupt signal and controlling the electronic switch circuit to be switched on according to the external interrupt signal; the key awakening circuit is electrically connected with the electronic switch circuit and used for controlling the electronic switch circuit to be switched on when the key is pressed down.
2. The low power electronic switching device according to claim 1, wherein the electronic switching circuit includes a diode D3, a diode D4, a diode D5, a diode D6, a switching transistor Q4, a transistor Q5, a transistor Q6, a transistor Q7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R24, and a resistor R25;
the anode of the diode D3 is electrically connected with the output end of the external wake-up circuit and is used for accessing a second wake-up signal; the anode of the diode D4 is electrically connected with the output end of the clock wake-up circuit and is used for accessing a first wake-up signal; the cathode of the diode D3 and the cathode of the diode D4 are electrically connected with the anodes of the diode D5 and the diode D6; one ends of the resistor R24 and the capacitor C13 are grounded, and the other ends of the resistor R24 and the capacitor C13 are connected between the anodes of the diode D5 and the diode D6 and the cathodes of the diode D3 and the diode D4; the anodes of the diode D5 and the diode D6 are electrically connected with the output end of the external key wake-up circuit and are used for accessing a third wake-up signal;
the cathode of the diode D5 is electrically connected with the base of the triode Q6 through the resistor R20, the emitter of the triode Q6 is grounded, and the collector of the triode Q6 is electrically connected with the source of the switch tube Q4 through the resistor R19; one end of the resistor R21 is grounded, and the other end is connected between the resistor R20 and the base electrode of the triode Q6;
the cathode of the diode D6 is electrically connected with the base of the triode Q7 through the resistor R23, the emitter of the triode Q7 is grounded, and the collector of the triode Q7 is electrically connected with the drain of the switch tube Q4 through the resistor R17; one end of the resistor R25 is grounded, and the other end is connected between the resistor R23 and the base electrode of the triode Q7;
one ends of the resistor R22 and the capacitor C12 are grounded, and the other ends of the resistor R22 and the capacitor C12 are connected between the base electrodes of the triode Q7 and the triode Q5; the base electrode of the triode Q5 is connected between the resistor R17 and the collector electrode of the triode Q7, the emitter electrode is grounded, and the collector electrode is electrically connected with the drain electrode of the switching tube Q4 through the resistor R18;
one ends of the capacitor C10 and the capacitor C11 are grounded, and the other ends of the capacitor C10 and the capacitor C11 are electrically connected with the drain electrode of the switching tube Q4;
one end of the capacitor C8 is grounded, and the other end is electrically connected with the grid of the switch tube Q4; one end of each of the capacitor C9 and the resistor R16 is connected between the resistor R19 and the source electrode of the switching tube Q4, and the other end of each of the capacitor C9 and the resistor R16 is electrically connected with the gate electrode of the switching tube Q4;
the grid electrode of the switching tube Q4 is electrically connected with a power supply VABT, and the drain electrode of the switching tube Q4 supplies power to a power supply VCC _ SYS of the equipment output equipment;
when the first wake-up signal is at a high level or the second wake-up signal is at a high level, a signal VSYS _ EN output by the diode D3 or the diode D4 is at a high level, the triode Q6 is conducted with the triode Q7, the switch tube Q4 is conducted, the device is connected to a device power supply VCC _ SYS and enters a normal working state; when the third wake-up signal is at a high level, the transistor Q6 is connected to the transistor Q7, the switch transistor Q4 is connected, and the device is connected to the device power supply VCC _ SYS and enters a normal operating state.
3. The low power electronic switching device of claim 2, wherein the switching transistor Q4 is a field effect transistor having a type SI2305 CDS.
4. The low power electronic switching device of claim 2, wherein the external wake-up circuit comprises a capacitor C7, a resistor R12, a resistor R13, a resistor R14, a resistor R15, and a triode Q3; the base electrode of the triode Q3 is connected with an external interrupt signal through a resistor R13, and the emitter electrode is connected with a power supply VBAT; the collector of the triode Q3 is electrically connected with the anode of the diode D3 of the electronic switch circuit and is used for inputting a second wake-up signal to the electronic switch circuit;
the collector electrode of the triode Q3 is also electrically connected with the main control MCU through a resistor R14 and is used for inputting a fourth control signal to the main control MCU;
one ends of the capacitor C7 and the resistor R15 are grounded, and the other ends of the capacitor C7 and the resistor R15 are electrically connected with the resistor R14;
one end of the resistor R12 is connected between the resistor R13 and the base electrode of the triode Q3, and the other end of the resistor R12 is electrically connected with the emitting electrode of the triode Q3;
when the external interrupt signal is at a high level, the triode Q3 is cut off, and a second wake-up signal output by the output end of the external wake-up circuit is at a low level; at this time, the output signal VSYS _ EN of the diode D3 of the electronic switch circuit is at a low level, the triode Q6 and the triode Q7 are cut off, and the switch tube Q4 is turned off;
when the external interrupt signal is at a low level, the triode Q3 is turned on, and a second wake-up signal output by the output end of the external wake-up circuit is at a high level; at this time, the output signal VSYS _ EN of the diode D3 of the electronic switch circuit is at a high level, the transistor Q6 and the transistor Q7 are turned on, and the switch Q4 is turned on.
5. The low-power electronic switching device according to claim 2, wherein the clock wake-up circuit comprises a clock chip U1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C8, a resistor R2, a resistor R3, a resistor R5, a resistor R8, a resistor R10, a resistor R11, a transistor Q2 and a spare button battery BT 1; a port 3 of the clock chip U1 is connected to a power supply VBAT, the port 3 is grounded through a capacitor C3 and a capacitor C4, a port 4 is suspended, a port 5 is grounded through a capacitor C5, the port 5 is grounded through a standby button battery BT1, a port 6 is grounded, a port 2 is suspended, a port 8 is electrically connected with a main control MCU of the equipment through a resistor R2, a port 1 is electrically connected with the main control MCU of the equipment through a resistor R3, and a port 7 is electrically connected with a base of a triode Q2 through a resistor R8;
an emitter of the triode Q2 is connected with a power supply VBAT; one end of the resistor R5 is connected between a power supply VBAT and an emitter of the triode Q2, and the other end of the resistor R8 is connected between a base of the triode Q2; the collector of the triode Q2 is electrically connected with a diode D4 of the electronic switch circuit and is used for inputting a first wake-up signal to the electronic switch circuit;
the collector of the triode Q2 is electrically connected with the main control MCU through a resistor R10 and is used for accessing a first control signal; one end of the resistor R11 is grounded, and the other end is electrically connected with the resistor R10; one end of the capacitor C8 is grounded, and the other end is electrically connected with the resistor R10;
when the clock chip U1 detects that the countdown is finished, the port 7 of the clock chip U1 outputs a high level, the triode Q2 is conducted, and a first wake-up signal output by the output end of the clock wake-up circuit is at the high level; at this time, the signal VSYS _ EN output from the negative electrode of the diode D4 of the electronic switch circuit is at a high level, the transistor Q6 and the transistor Q7 are turned on, and the switch Q4 is turned on.
6. The low power consumption electronic switching device according to claim 2, wherein the key wake-up circuit comprises a resistor R1, a resistor R4, a resistor R6, a resistor R7, a resistor R9, a transistor Q1, a diode D1, a diode D2, a key SW1, a capacitor C1, a capacitor C2 and a diode ESD 1; the collector of the triode Q1 is connected to a power supply VCC _ MCU collector of the main control MCU through a resistor R1 and electrically connected with the main control MCU, and is used for outputting a second control signal to the main control MCU; the emitter of the triode Q1 is grounded, and the base is electrically connected with the anode of the diode D1 through the resistor R6;
the cathode of the diode D1 outputs a third wake-up signal;
the anode of the diode D2 is electrically connected with the main control MCU and is used for accessing a third control signal; the cathode of the diode D2 outputs a third wake-up signal;
one end of the resistor R9 is grounded, and the other end is electrically connected with the anode of the diode D2; one end of the resistor R7 is grounded, and the other end is connected between the resistor R6 and the base electrode of the triode Q1;
the port 3 of the key SW1 is grounded, the port 4 is grounded, the port 2 is connected to the power module, and the port 1 is electrically connected with the anode of the diode D1;
one end of the capacitor C1 is grounded, and the other end is electrically connected with the port 2 of the key SW 1; one end of the capacitor C2 is grounded, and the other end is electrically connected with the port 1 of the key SW 1; one end of the diode ESD1 is grounded, and the other end is electrically connected with the port 1 of the key SW 1;
when the key SW1 is not pressed, the third wake-up signal output by the output end of the key wake-up circuit is at a low level, the triode Q6 and the triode Q7 in the electronic switch circuit are both cut off, the switch tube Q4 is cut off, and the device is powered off and enters a standby state;
when the key SW1 is pressed, a third wake-up signal output by the output end of the key wake-up circuit is at a high level, the triode Q6 and the triode Q7 of the electronic switch circuit are switched on, the switch tube Q4 is switched on, and the equipment is connected to the equipment power supply VCC _ SYS and enters a normal working state.
7. The low power electronic switching device of claim 6, further comprising a voltage step-down circuit; the input end of the voltage reduction circuit is electrically connected with the power supply through the electronic switch circuit, and the output end of the voltage reduction circuit is electrically connected with the master control MCU, so that when the electronic switch circuit is switched on, the equipment power supply is converted into the master control MCU power supply.
8. The low power electronic switching device according to claim 7, wherein the voltage reduction circuit comprises a chip U2, a capacitor C14, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C19, a resistor R26, a resistor R27, a resistor R28 and an inductor L1;
a port 4 of the chip U2 is connected with a device power supply VCC _ SYS, a port 2 is grounded, a port 1 is connected with a third wake-up signal VSYS _ EN through a resistor R26, the port 1 is grounded through a capacitor C19, and a port 5 is grounded through a resistor R28; a port 3 of the chip U2 outputs a main control MCU power supply VCC _ MCU through an inductor L1;
one ends of the capacitor C16 and the capacitor C18 are grounded, and the other ends of the capacitor C16 and the capacitor C18 are electrically connected with the port 4 of the chip U2;
one end of the capacitor C14 is electrically connected with the port 3 of the chip U3 through the inductor L1, and the other end is grounded through the resistor R28;
one end of the resistor R27 is electrically connected with the port 3 of the chip U3 through the inductor L1, and the other end is grounded through the resistor R28;
one ends of the capacitor C15 and the capacitor C17 are grounded, and the other ends of the capacitor C15 and the capacitor C17 are electrically connected with the port 3 of the chip U3 through the inductor L1;
when the third wake-up signal is at a high level, the port 1 of the chip U2 is at a high level, the chip U2 converts the device power supply VCC _ SYS into a main control MCU power supply VCC _ MCU, and the main control MCU switches on the power supply and enters a normal working state;
when the third wake-up signal is at a low level, the chip U2 does not operate, and the master control MCU does not operate when the power is turned off.
9. The low power consumption electronic switch device of claim 6, wherein when the device is in a standby state and the key SW1 is pressed, the main control MCU and the device enter a normal operating state when the second control signal obtained by the main control MCU is at a high level, and the third control signal is set to a high level by the main control MCU; then when the key SW1 is released, the main control MCU and the equipment are still in a normal working state;
when the device and the master control MCU are both in a working state, the key SW1 is pressed down, and the master control MCU receives the second control signal and sets the third control signal to be a low level, then after the key SW1 is released, the triode Q1 is cut off, the third wake-up signal is a low level, the switching tube Q4 of the electronic switching circuit is cut off, the device is powered off, and the device enters a standby state; meanwhile, the voltage reduction circuit does not work, and the master control MCU is powered off and does not work.
10. A low power consumption device control system comprising a system device, a master MCU of the system device, a system power supply and a low power consumption electronic switching device according to any of claims 1 to 9; the input end of the low-power consumption electronic switch device is electrically connected with a system power supply, the first output end of the low-power consumption electronic switch device is electrically connected with system equipment, and the second output end of the low-power consumption electronic switch device is electrically connected with a master control MCU; and the low-power-consumption electronic switch device is used for controlling the on-off of the system power supply and the system equipment and the system power supply and the master control MCU so as to realize the switching between the standby state and the normal working state of the system equipment and the master control MCU.
CN202111014193.2A 2021-08-31 2021-08-31 Low-power consumption electronic switch device and equipment control system Pending CN113805507A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114356065A (en) * 2021-12-29 2022-04-15 浙江华锐捷技术有限公司 System and method for controlling power-on of main control module
CN116028391A (en) * 2022-07-15 2023-04-28 荣耀终端有限公司 Electronic device, peripheral device, and single-wire communication system
CN117411162A (en) * 2023-12-14 2024-01-16 天津云圣智能科技有限责任公司 Unmanned aerial vehicle battery low-power consumption control device and system
CN117458833A (en) * 2023-12-26 2024-01-26 无锡梵克罗电气设计有限公司 Battery-powered frequency converter low-power-consumption startup awakening circuit and frequency converter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114356065A (en) * 2021-12-29 2022-04-15 浙江华锐捷技术有限公司 System and method for controlling power-on of main control module
CN116028391A (en) * 2022-07-15 2023-04-28 荣耀终端有限公司 Electronic device, peripheral device, and single-wire communication system
CN116028391B (en) * 2022-07-15 2024-03-22 荣耀终端有限公司 Electronic device, peripheral device, and single-wire communication system
CN117411162A (en) * 2023-12-14 2024-01-16 天津云圣智能科技有限责任公司 Unmanned aerial vehicle battery low-power consumption control device and system
CN117411162B (en) * 2023-12-14 2024-03-08 天津云圣智能科技有限责任公司 Unmanned aerial vehicle battery low-power consumption control device and system
CN117458833A (en) * 2023-12-26 2024-01-26 无锡梵克罗电气设计有限公司 Battery-powered frequency converter low-power-consumption startup awakening circuit and frequency converter
CN117458833B (en) * 2023-12-26 2024-04-19 无锡梵克罗电气设计有限公司 Battery-powered frequency converter low-power-consumption startup awakening circuit and frequency converter

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