CN216851735U - Power supply circuit - Google Patents
Power supply circuit Download PDFInfo
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- CN216851735U CN216851735U CN202123219661.8U CN202123219661U CN216851735U CN 216851735 U CN216851735 U CN 216851735U CN 202123219661 U CN202123219661 U CN 202123219661U CN 216851735 U CN216851735 U CN 216851735U
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Abstract
A power circuit comprises a control module, a voltage detection module, a voltage on-off module and a power module; the control module is respectively connected with the voltage detection module and the voltage on-off module, the power supply module is respectively connected with the control module, the voltage detection module and the voltage on-off module and supplies power, the voltage detection module comprises a chip U1, a capacitor C7, a resistor R13 and a resistor R14, and the power supply module outputs +5V working voltage and +3.3V working voltage; the pin 8 of the chip U1 is connected with the first end of the capacitor C7, the first end of the resistor R13 and the first end of the resistor R14, and the pin 13 of the chip U1 is connected with +3.3V working voltage; the second end of the capacitor C7 and the second end of the resistor R14 are both grounded, and the second end of the resistor R13 is connected with +5V working voltage. The utility model discloses can be used for detecting the voltage output of power input voltage and control.
Description
Technical Field
The utility model belongs to the technical field of the circuit, concretely relates to power supply circuit.
Background
Along with the increasing of the social living standard, various infant electrical appliances appear on the market, and the safety problem of the infant electrical appliances is also increasingly emphasized, wherein, when the infant electrical appliances input power supply is used by mistake or the voltage fails, the situation of voltage mismatching or voltage instability is caused, the probability of circuit board damage is greatly increased, the use safety of the infant electrical appliances is influenced, and certain limitation exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a power supply circuit, it can be used for detecting the voltage output of power input voltage and control.
In order to achieve the above object, the embodiment of the present invention provides a technical solution:
a power circuit comprises a control module, a voltage detection module, a voltage on-off module and a power module;
the control module is respectively connected with the voltage detection module and the voltage on-off module, and the power supply module is respectively connected with the control module, the voltage detection module and the voltage on-off module and supplies power.
As a further improvement of the above technical solution, the voltage detection module includes a chip U1, a capacitor C7, a resistor R13, and a resistor R14, and the power supply module outputs +5V working voltage and +3.3V working voltage;
a pin 8 of the chip U1 is connected with a first end of a capacitor C7, a first end of a resistor R13 and a first end of a resistor R14, and a pin 13 of the chip U1 is connected with +3.3V working voltage;
the second end of the capacitor C7 and the second end of the resistor R14 are both grounded, and the second end of the resistor R13 is connected with +5V working voltage;
the control module comprises a chip U2 and a resistor R15;
the pin 18 of the chip U2 is connected with the first end of the resistor R15, the pin 9 of the chip U1 is connected with the second end of the resistor R15, the pin 4 of the chip U2 is connected with the voltage on-off module, and the pin 9 of the chip U2 is connected with +3.3V working voltage.
As a further improvement of the above technical solution, the control module includes a transistor Q1, a resistor R1, and a capacitor C2;
the 4 pins of the chip U2 are connected with a first end of a resistor R1 and a first end of a capacitor C2;
the second end of the capacitor C2 is grounded;
the second end of the resistor R1 and the emitter of the triode Q1 are connected with +3.3V working voltage;
the pin 5 of the chip U2 is connected with the base electrode of the triode Q1, and the collector electrode of the triode Q1 is connected with the voltage on-off module.
As a further improvement of the above technical solution, the voltage switching module includes a triode Q2, a resistor R22, a MOS transistor Q3, a resistor R23, an electrolytic capacitor EC3, a resistor R11, and a capacitor C16;
the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the emitter electrode of the triode Q2 is grounded, and the collector electrode of the triode Q2 is connected with the first end of the resistor R22;
the grid electrode of the MOS tube Q3 is connected with the second end of the resistor R22 and the first end of the resistor R23, the source electrode of the MOS tube Q3 and the second end of the resistor R23 are connected with +5V working voltage, and the drain electrode of the MOS tube Q3 is connected with the positive electrode end of the electrolytic capacitor EC3 and the first end of the resistor R11;
the negative electrode of the electrolytic capacitor EC3 is grounded;
the second end of the resistor R11 is connected with the first end of the capacitor C16, and the second end of the resistor R11 outputs 4.8V working voltage;
the second terminal of the capacitor C16 is connected to ground.
As a further improvement of the above technical solution, the power supply module includes a 5V sub-power supply module;
the 5V sub-power supply module comprises a socket CN1, a diode D1, an electrolytic capacitor EC2 and a socket CN 4;
the cathode of the diode D1 is connected with the pin 3 of the socket CN1 and the anode of the electrolytic capacitor EC2, and the cathode of the diode D1 outputs +5V working voltage;
the pin 2 of the socket CN1 and the negative terminal of the electrolytic capacitor EC2 are both grounded.
As a further improvement of the above technical solution, the power supply module includes a 3.3V sub-power supply module;
the 3.3V sub-power supply module comprises a three-terminal voltage stabilizing chip U5, an electrolytic capacitor EC1 and a capacitor C14;
the input end of the three-terminal voltage-stabilizing chip U5 is connected with +5V working voltage, the output end of the three-terminal voltage-stabilizing chip U5 is respectively connected with the first end of the electrolytic capacitor EC1 and the first end of the capacitor C14, the output end of the three-terminal voltage-stabilizing chip U5 outputs +3.3V working voltage, and the grounding end of the three-terminal voltage-stabilizing chip U5, the second end of the electrolytic capacitor EC1 and the second end of the capacitor C14 are all grounded.
The beneficial effects of the utility model are that: the utility model discloses power supply circuit includes control module, voltage detection module, voltage break-make module and power module, and it can be used for detecting the voltage output of power input voltage and control.
Drawings
Fig. 1 is a circuit diagram of a control module and a voltage detection module according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of the voltage on-off module according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of a 5V sub-power supply module according to an embodiment of the present invention.
Fig. 4 is a circuit diagram of a 3.3V sub-power supply module according to an embodiment of the present invention.
Fig. 5 is a circuit diagram of an execution module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
Referring to fig. 1-5, the power circuit comprises a control module, a voltage detection module, a voltage on-off module and a power module, wherein the voltage on-off module is connected with an execution module;
the control module is respectively connected with the voltage detection module and the voltage on-off module, and the power supply module is respectively connected with the control module, the voltage detection module and the voltage on-off module and supplies power.
The voltage detection module is used for detecting whether the voltage supplied by the power supply module meets the requirement or not and transmitting a corresponding signal to the control module, and the control module receives the corresponding signal and drives the voltage on-off module to operate, so that the voltage on-off module supplies power to the execution module or cuts off the power of the execution module, and the circuit of the execution module is prevented from being damaged.
Further, referring to fig. 1, the voltage detection module includes a chip U1, a capacitor C7, a resistor R13, and a resistor R14, and the power supply module outputs a +5V operating voltage and a +3.3V operating voltage, in this embodiment, the model of the chip U1 is 7612-16 sop.
A pin 8 of the chip U1 is connected with a first end of a capacitor C7, a first end of a resistor R13 and a first end of a resistor R14, and a pin 13 of the chip U1 is connected with +3.3V working voltage;
the second end of electric capacity C7, the second end of resistance R14 all ground connection, and electric capacity C7 is the paster electric capacity, plays the effect of filtering to the signal of 8 feet of access chip U1, avoids the interference to the detection, and the second end access +5V operating voltage of resistance R13, and resistance R13 and resistance R14 are accurate resistance, and the application of accurate resistance enables the measuring result more accurate.
The control module includes a chip U2 and a resistor R15, and in this embodiment, the model of the chip U2 is MM32F 003.
A pin 18 of the chip U2 is connected with a first end of the resistor R15, a pin 9 of the chip U1 is connected with a second end of the resistor R15, a pin 4 of the chip U2 is connected with the voltage on-off module, and a pin 9 of the chip U2 is connected with +3.3V working voltage;
the 8 pins of the chip U1 receive corresponding voltage signals and obtain corresponding voltage values through a digital-to-analog conversion circuit inside the chip U1, the chip U1 is used for detecting whether the voltage meets requirements or not, corresponding signals are output to the 18 pins of the chip U2 through the 9 pins of the chip U1 and the resistor R15, and then the control module transmits signals to the voltage on-off module through the 4 pins of the chip U2 to drive the voltage on-off module to operate.
Further, referring to fig. 1, the control module includes a transistor Q1, a resistor R1, and a capacitor C2, in this embodiment, the transistor Q1 is of type 2133.
The 4 pins of the chip U2 are connected with the first end of the resistor R1 and the first end of the capacitor C2;
the second end of the capacitor C2 is grounded;
the second end of the resistor R1 and the emitter of the triode Q1 are connected with +3.3V working voltage;
the pin 5 of the chip U2 is connected with the base of the triode Q1, and the collector of the triode Q1 is connected with the voltage on-off module.
When pin 5 of the chip U2 outputs a low level to the base of the transistor Q1, the transistor Q1 is turned on.
When pin 5 of the chip U2 outputs a high level to the base of the transistor Q1, the transistor Q1 is turned off.
Referring to fig. 2, the voltage switching module includes a transistor Q2, a resistor R22, a MOS transistor Q3, a resistor R23, an electrolytic capacitor EC3, a resistor R11, and a capacitor C16, in this embodiment, the transistor Q2 is model number LMUN2232LT1G, and the MOS transistor Q3 is model number SI 2301.
The base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the emitter electrode of the triode Q2 is grounded, the collector electrode of the triode Q2 is connected with the first end of the resistor R22, and the triode Q2 is used for increasing the driving capability of the chip U2 to drive the MOS tube Q3;
the grid of the MOS tube Q3 is connected with the second end of the resistor R22 and the first end of the resistor R23, the source of the MOS tube Q3 and the second end of the resistor R23 are connected with +5V working voltage, the resistor R22 is a current-limiting resistor, the resistor R23 is a pull-up resistor, the grid voltage of the MOS tube Q3 is clamped in a high-voltage state, the MOS tube Q3 is prevented from being triggered mistakenly, and the drain of the MOS tube Q3 is connected with the positive electrode end of the electrolytic capacitor EC3 and the first end of the resistor R11;
the negative electrode of the electrolytic capacitor EC3 is grounded, and the electrolytic capacitor EC3 enables the output to be more stable.
The second end of the resistor R11 is connected with the first end of the capacitor C16, and the second end of the resistor R11 outputs 4.8V working voltage;
the second terminal of the capacitor C16 is connected to ground.
Referring to fig. 5, the execution module includes a chip U6, in this embodiment, the model of the chip U6 is AC6925B4, and pin 18 of the chip U6 is connected to a 4.8V operating voltage.
When the voltage of the pin 18 of the chip U2, which receives the pin 9 of the chip U1, does not meet the requirement, and the pin 5 of the chip U2 outputs a low level to the base of the triode Q1, the triode Q1 is turned on, the triode Q2 is turned off, the MOS transistor Q3 is turned off, the second end of the resistor R11 does not output 4.8V working voltage any more, the power supply to the chip U6 is stopped, and the damage of an execution module is avoided.
When the pin 18 of the chip U2 receives the voltage of the pin 9 of the chip U1 and meets the requirement, and the pin 5 of the chip U2 outputs a high level to the base electrode of the triode Q1, the triode Q1 is cut off, the triode Q2 is switched on, the MOS transistor Q3 is switched on, and the second end of the resistor R11 outputs 4.8V working voltage and supplies power to the chip U6.
Further, referring to fig. 3, the power supply module includes a 5V sub power supply module;
the 5V sub-power supply module comprises a socket CN1, a diode D1, an electrolytic capacitor EC2 and a socket CN4, wherein the diode D1 is used for protecting the reverse connection of the battery, the electrolytic capacitor EC2 is used for preventing burrs from being generated on output, and the socket CN1 is used for externally connecting a load circuit.
the cathode of the diode D1 is connected with the pin 3 of the socket CN1 and the anode of the electrolytic capacitor EC2, the cathode of the diode D1 outputs +5V working voltage, and when the external battery is used incorrectly or the voltage of the external battery fails, namely the working voltage output by the cathode of the diode D1 is not +5V, the voltage detection module can detect that the voltage does not meet the requirement.
The 2 pin of the socket CN1 and the negative terminal of the electrolytic capacitor EC2 are both grounded.
Further, referring to fig. 4, the power supply module includes a 3.3V sub power supply module;
the 3.3V sub-power supply module includes a three-terminal regulator chip U5, an electrolytic capacitor EC1, and a capacitor C14, and in this embodiment, the model of the three-terminal regulator chip U5 is 7533.
The input end of the three-terminal voltage-stabilizing chip U5 is connected with +5V working voltage, the output end of the three-terminal voltage-stabilizing chip U5 is respectively connected with the first end of the electrolytic capacitor EC1 and the first end of the capacitor C14, the output end of the three-terminal voltage-stabilizing chip U5 outputs +3.3V working voltage, and the grounding end of the three-terminal voltage-stabilizing chip U5, the second end of the electrolytic capacitor EC1 and the second end of the capacitor C14 are all grounded.
The foregoing is a preferred embodiment of the present invention showing and describing the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but rather that various changes and modifications may be made without departing from the spirit and scope of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (5)
1. A power circuit is characterized by comprising a control module, a voltage detection module, a voltage on-off module and a power module;
the control module is respectively connected with the voltage detection module and the voltage on-off module, and the power supply module is respectively connected with the control module, the voltage detection module and the voltage on-off module and supplies power;
the voltage detection module comprises a chip U1, a capacitor C7, a resistor R13 and a resistor R14, and the power supply module outputs +5V working voltage and +3.3V working voltage;
the pin 8 of the chip U1 is connected with the first end of the capacitor C7, the first end of the resistor R13 and the first end of the resistor R14, and the pin 13 of the chip U1 is connected with +3.3V working voltage;
the second end of the capacitor C7 and the second end of the resistor R14 are both grounded, and the second end of the resistor R13 is connected with +5V working voltage;
the control module comprises a chip U2 and a resistor R15;
the pin 18 of the chip U2 is connected with the first end of the resistor R15, the pin 9 of the chip U1 is connected with the second end of the resistor R15, the pin 4 of the chip U2 is connected with the voltage on-off module, and the pin 9 of the chip U2 is connected with +3.3V working voltage.
2. The power supply circuit of claim 1, wherein the control module comprises a transistor Q1, a resistor R1, and a capacitor C2;
the 4 pins of the chip U2 are connected with a first end of a resistor R1 and a first end of a capacitor C2;
the second end of the capacitor C2 is grounded;
the second end of the resistor R1 and the emitter of the triode Q1 are connected with +3.3V working voltage;
and a pin 5 of the chip U2 is connected with the base electrode of the triode Q1, and the collector electrode of the triode Q1 is connected with the voltage on-off module.
3. The power supply circuit according to claim 2, wherein the voltage switching module comprises a transistor Q2, a resistor R22, a MOS transistor Q3, a resistor R23, an electrolytic capacitor EC3, a resistor R11 and a capacitor C16;
the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the emitter electrode of the triode Q2 is grounded, and the collector electrode of the triode Q2 is connected with the first end of the resistor R22;
the grid electrode of the MOS tube Q3 is connected with the second end of the resistor R22 and the first end of the resistor R23, the source electrode of the MOS tube Q3 and the second end of the resistor R23 are connected with +5V working voltage, and the drain electrode of the MOS tube Q3 is connected with the positive electrode end of the electrolytic capacitor EC3 and the first end of the resistor R11;
the negative electrode of the electrolytic capacitor EC3 is grounded;
the second end of the resistor R11 is connected with the first end of the capacitor C16, and the second end of the resistor R11 outputs 4.8V working voltage;
the second terminal of the capacitor C16 is connected to ground.
4. The power supply circuit of claim 3, wherein the power supply module comprises a 5V sub-supply module;
the 5V sub-power supply module comprises a socket CN1, a diode D1, an electrolytic capacitor EC2 and a socket CN 4;
pin 1 of the socket CN4 is connected with the positive terminal of the diode D1, and pin 2 of the socket CN4 is connected with pin 1 of the socket CN 1;
the cathode of the diode D1 is connected with the pin 3 of the socket CN1 and the anode of the electrolytic capacitor EC2, and the cathode of the diode D1 outputs +5V working voltage;
the pin 2 of the socket CN1 and the negative terminal of the electrolytic capacitor EC2 are both grounded.
5. The power supply circuit of claim 4, wherein the power supply module comprises a 3.3V sub-supply module;
the 3.3V sub-power supply module comprises a three-terminal voltage stabilizing chip U5, an electrolytic capacitor EC1 and a capacitor C14;
the input end of the three-terminal voltage-stabilizing chip U5 is connected with +5V working voltage, the output end of the three-terminal voltage-stabilizing chip U5 is respectively connected with the first end of the electrolytic capacitor EC1 and the first end of the capacitor C14, the output end of the three-terminal voltage-stabilizing chip U5 outputs +3.3V working voltage, and the grounding end of the three-terminal voltage-stabilizing chip U5, the second end of the electrolytic capacitor EC1 and the second end of the capacitor C14 are all grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123219661.8U CN216851735U (en) | 2021-12-18 | 2021-12-18 | Power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123219661.8U CN216851735U (en) | 2021-12-18 | 2021-12-18 | Power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216851735U true CN216851735U (en) | 2022-06-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123219661.8U Active CN216851735U (en) | 2021-12-18 | 2021-12-18 | Power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216851735U (en) |
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2021
- 2021-12-18 CN CN202123219661.8U patent/CN216851735U/en active Active
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