CN210007686U - power supply control circuit and emergency portable terminal thereof - Google Patents
power supply control circuit and emergency portable terminal thereof Download PDFInfo
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- CN210007686U CN210007686U CN201921105446.5U CN201921105446U CN210007686U CN 210007686 U CN210007686 U CN 210007686U CN 201921105446 U CN201921105446 U CN 201921105446U CN 210007686 U CN210007686 U CN 210007686U
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Abstract
The application provides power supply control circuits, which comprise a control switch, a key detection module, a water falling detection module and a main control module, wherein the control switch is connected between a power supply input end and a rear end circuit and used for controlling the connection and disconnection between the power supply input end and the rear end circuit, the key detection module is connected with a control end of the control switch and comprises a power supply key and is used for generating a key signal triggered by the power supply key, the water falling detection module is connected with the control end of the control switch and comprises a water falling trigger end and is used for generating a water falling signal triggered by the water falling trigger end, and the main control module is connected with the key detection module, the water falling detection module and the control switch and is used for controlling the control switch to be turned on or off according to the detection conditions of the key detection module and the water falling detection module.
Description
Technical Field
The application relates to the field of emergency portable terminals, in particular to power supply control circuits and an emergency portable terminal thereof.
Background
When people go out in special environments, such as in the field or at sea, people are rare in the environment, and the situation that people cannot be rescued in time is easy to happen if an emergency occurs.
Therefore, in this case, people travel with the emergency portable terminal having the satellite positioning and emergency communication functions to ensure that the transmission of the distress signal can be completed in extreme cases, the emergency portable terminal may be further provided with an automatic alarm function for drowning in cases.
The existing automatic alarm function of falling into water needs an independent control circuit of falling into water, but because the automatic alarm function of falling into water is independent of a power supply control circuit, the main control module is required to monitor the automatic alarm function of falling into water, so that the automatic alarm function of falling into water not only occupies processing resources of the main control module, but also has a complex circuit design, and the manufacturing cost of products is increased.
SUMMERY OF THE UTILITY MODEL
The application provides kinds of power supply control circuits and an emergency portable terminal thereof, which can reduce the manufacturing cost of products.
The embodiment of the application discloses kinds of power control circuit, the circuit includes:
the control switch is connected between a power supply input end and the back-end circuit and used for controlling the on-off between the power supply input end and the back-end circuit;
the key detection module is connected with the control end of the control switch and comprises a power supply key, and the key detection module is used for generating a key signal triggered by the power supply key;
the water falling detection module is connected with the control end of the control switch and comprises a water falling trigger end, and the water falling detection module is used for generating a water falling signal triggered by the water falling trigger end; and
and the main control module is connected with the key detection module, the water falling detection module and the control switch and is used for controlling the control switch to be turned on or turned off according to the detection conditions of the key detection module and the water falling detection module.
Optionally, the control switch includes an th MOS transistor and a second MOS transistor, wherein:
the th MOS tube is connected between the power supply input end and the back-end circuit;
the second MOS tube is connected between the gate of the th MOS tube and a reference ground, and the gate of the second MOS tube is connected with the power supply control end of the main control module.
Optionally, a pull-down resistor is disposed between the gate of the second MOS transistor and the reference ground.
Optionally, an LDO chip and a filtering module for voltage regulation are further connected in series between the back-end circuit and the th MOS transistor.
Optionally, the key detection module includes:
th detection diode with positive pole connected with control end of the control switch and negative pole connected with reference ground by the power source key, th detection diode with positive pole connected with key detection end of the main control module.
The drowning detection module includes:
and the anode of the second detection diode is also connected with the water falling detection end of the main control module and the anode of the detection diode.
Optionally, an input power supply is arranged between the anode of the th detection diode and the anode of the second detection diode;
a resistor is connected in series between the input power source and the anode of the th detection diode, and the drowning detection end is connected between the th resistor and the anode of the th detection diode;
and a second resistor is connected in series between the input power supply and the anode of the second detection diode, and the key detection end is connected between the second resistor and the anode of the second detection diode.
Optionally, the th detection diode and the second detection diode are both cascode diodes;
the th sense diode includes a th anode and a second anode, the second sense diode includes a third anode and a fourth anode, wherein:
the th positive electrode is connected with the drowning detection end;
the second positive electrode is connected with the third positive electrode and is connected with the control end of the control switch;
the fourth positive electrode is connected with the key detection end and the th positive electrode;
an input power supply is also connected between the th positive electrode and the fourth positive electrode.
The embodiment of the application also discloses kinds of emergent portable terminals, include:
a housing;
the power supply, the power supply control circuit and the rear end circuit are arranged in the shell;
a water drop contact disposed on the side of the housing ;
wherein the power control circuit comprises:
the control switch is connected between a power supply input end and the back-end circuit and used for controlling the on-off between the power supply input end and the back-end circuit;
the key detection module is connected with the control end of the control switch and comprises a power supply key, and the key detection module is used for generating a key signal triggered by the power supply key;
the water falling detection module is connected with the control end of the control switch and comprises a water falling trigger end, and the water falling detection module is used for generating a water falling signal triggered by the water falling trigger end; and
the main control module is connected with the key detection module, the water falling detection module and the control switch and is used for controlling the control switch to be turned on or turned off according to the detection conditions of the key detection module and the water falling detection module;
the power supply is connected with the back end circuit through the power supply control circuit;
the positive pole of the water falling contact is connected with the water falling triggering end of the water falling detection module, and the negative pole of the water falling contact is connected with the reference ground of the water falling detection module.
Optionally, the control switch includes an th MOS transistor and a second MOS transistor, wherein:
the th MOS tube is connected between the power supply input end and the back-end circuit;
the second MOS tube is connected between the gate of the th MOS tube and a reference ground, and the gate of the second MOS tube is connected with the power supply control end of the main control module.
Optionally, the key detection module includes:
th detection diode with positive pole connected with control end of the control switch and negative pole connected with reference ground by the power source key, th detection diode with positive pole connected with key detection end of the main control module.
The drowning detection module includes:
and the anode of the second detection diode is also connected with the water falling detection end of the main control module and the anode of the detection diode.
As can be seen from the above, in the power control circuit and the emergency portable terminal thereof in the embodiment of the present application, the drowning detection module and the key detection module are integrated in the power control circuit , and the distinction of the trigger signals generated by the two modules is realized through the main control module, and it is not necessary to independently design the circuit related to the drowning detection function, so that the circuit layout is simpler, and the manufacturing cost of the product is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a power control circuit according to an embodiment of the present disclosure.
Fig. 2 is another schematic diagram of the power control circuit according to the embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of an emergency portable terminal according to an embodiment of the present application.
Detailed Description
The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, will make the advantages and features of the present application more readily appreciated by those skilled in the art, and thus will more clearly define the scope of the invention.
Referring to fig. 1-2, structures of a power control circuit according to an embodiment of the present disclosure are shown.
As shown in fig. 1, the power control circuit includes a control switch 1, a key detection module 2, a water-falling detection module 3, and a main control module 4.
The control switch 1 is connected between the power input end V-BAT and the back-end circuit 5 and is used for controlling the on-off between the power input end V-BAT and the back-end circuit 5.
The back-end circuit 5 may include control circuits, such as a communication circuit, a display circuit, etc., and the specific circuit type is not limited.
Specifically, the control switch 1 may be controlled by a switch MOS transistor, a source and a drain of the switch MOS transistor are connected between the power input terminal V-BAT and the back-end circuit 5, and a gate of the switch MOS transistor is used as a control terminal to control conduction between the source and the drain to realize control of power input.
In embodiments, referring to fig. 2, the control switch 1 includes a MOS transistor Q1 and a second MOS transistor Q2, wherein:
the th MOS tube Q1 is connected between the power supply input end V-BAT and the back-end circuit 5, the second MOS tube Q2 is connected between the gate of the th MOS tube Q1 and the reference ground, and the gate of the second MOS tube Q2 is connected with the power supply control end PWR-CTRL of the main control module 4.
Specifically, the source of the th MOS transistor Q1 is connected to the power input end V-BAT, the drain is connected to the back-end circuit 5, the source of the second MOS transistor Q2 is connected to the ground reference, and the drain is connected to the gate of the th MOS transistor Q1. the main control module 4 can control the on/off of the second MOS transistor Q2 through the power control end PWR-CTRL.
For example, when the second MOS transistor Q2 is turned on, the gate of the MOS transistor Q1 can be driven by the second MOS transistor Q2 to turn on the MOS transistor Q1, and when the second MOS transistor Q2 is turned off, the MOS transistor Q1 is also kept in an off state without any other driving.
A pull-down resistor R5. can be arranged between the gate of the second MOS transistor and the reference ground, and an LDO chip U1 and a filter module for voltage stabilization are also connected in series between the back-end circuit 5 and the MOS transistor Q1.
In practical implementation, when the power key SW1 is pressed, the MOS transistor Q1 may be controlled to be turned on, and at this time, the main control module 4 determines that the power key SW1 needs to perform a start-up operation after being pressed, and may output a driving voltage through the power control terminal PWR-CTRL to maintain the second MOS transistor Q2 in an on state, and at this time, even after the power key SW1 leaves, the second MOS transistor Q2 may control the MOS transistor Q1 to be continuously turned on, and on the contrary, if the power key SW1 is pressed again, the main control module 4 determines that the key needs to perform a close operation after being pressed, the driving voltage may be cancelled through the power control terminal PWR-CTRL to turn off the second MOS transistor Q2, and further turn off the second MOS transistor Q2, so that the combination of the second MOS transistor Q2 and the main control module 4 may perform an on/off control of the MOS transistor Q1.
The key detection module 2 is connected to the control end of the control switch 1, and includes a power key SW1, and the key detection module 2 is configured to generate a key signal triggered by the power key SW 1.
When the power key SW1 is pressed, the key switch is turned on to generate signal triggering, and the main control module 4 can be used to detect the triggering of the key signal.
in some embodiments, triggering of the key signal may be accomplished by connecting the power key SW1 to a sense diode such that when the power key SW1 is turned on, a key signal is generated by sensing a change in the voltage of the sense diode the power key SW1 may also be connected in parallel to capacitor C11 to filter key jitter.
Specifically, the key detection module 2 comprises an th detection diode D1, the anode of which is connected with the control end of the control switch 1, and the cathode of which is connected with the ground through a power key SW1, the anode of the th detection diode D1 is also connected with a key detection end PWR-DETECT of the main control module 4, and the key detection end PWR-DETECT of the main control module 4 judges whether the power key SW1 is pressed or not by detecting the voltage change of the anode of the th detection diode D1.
The water falling detection module 3 is connected with the control end of the control switch 1 and comprises a water falling trigger end DETECT, and the water falling detection module 3 is used for generating a water falling signal triggered by the water falling trigger end DETECT.
The water drop trigger terminal DETECT can be connected with an external water drop contact. Specifically, the water falling trigger terminal DETECT is connected to the positive electrode of the water falling contact, and is connected to the negative electrode of the water falling contact in reference, so that when the water falling contact is conducted by the conductive water, a corresponding water falling signal can be generated.
In , the drain trigger terminal DETECT may be connected to a detection diode, so that when the drain trigger terminal DETECT is turned on, the drain signal is triggered by detecting the voltage change of the detection diode to generate the drain signal.
Specifically, the WATER drop detection module 3 includes a second detection diode D2, the anode of which is connected to the control terminal of the control switch 1, the cathode of which is connected to the WATER drop trigger terminal DETECT, and the capacitor C45 of is connected to the ground, the anode of the second detection diode D2 is also connected to the WATER drop detection terminal WATER-DETECT of the main control module 4, the anode of the detection diode D1, and the gate of the MOS transistor Q1, the WATER drop detection terminal WATER-DETECT of the main control module 4 determines whether the power SW1 is pressed or not by detecting the voltage change of the anode of the detection diode D1.
It can be understood that the key detection terminal PWR-DETECT and the WATER detection terminal WATER-DETECT of the main control module 4 can both determine whether there is a trigger by the existing voltage determination method. For example, the main control module 4 sets the low level of the key detection terminal PWR-DETECT to be the trigger level, and the high level is not triggered, so that the main control module 4 triggers the start operation after the power key SW1 is pressed when detecting that the key detection terminal PWR-DETECT is the low level.
In embodiments, referring to fig. 2, an input power supply VDDS may be provided between the anode of the th sense diode D1 and the anode of the second sense diode D2;
a -th resistor R3 is connected in series between the input power VDDS and the anode of the -th detection diode D1, the WATER falling detection terminal WATER-DETECT is connected between the -th resistor R3 and the anode of the -th detection diode D1, a second resistor R42 is connected in series between the input power VDDS and the anode of the second detection diode D2, and the key detection terminal PWR-DETECT is connected between the second resistor R42 and the anode of the second detection diode D2.
The circuit design uses the th resistor R3 and the second resistor R42 as the pull-up resistors of the th detection diode D1 and the second detection diode D2, respectively, to ensure that the voltage values detected by the WATER falling detection terminal WATER-DETECT and the key detection terminal PWR-DETECT are high when the key is not pressed and the voltage values detected by the key when the WATER falling trigger terminal DETECT is turned on by WATER are low.
And the main control module 4 is connected with the key detection module 2, the water falling detection module 3 and the control switch 1, and is used for controlling the control switch 1 to be turned on or turned off according to the detection conditions of the key detection module 2 and the water falling detection module 3.
The main control module 4 DETECTs the voltage states of the detection diodes related to the key detection module 2 and the water drop detection module 3, so that the on/off of the control switch 1 is simultaneously controlled by the th detection diode D1 and the second detection diode D2, that is, by the water drop trigger terminal DETECT and the power key SW1, as long as of the detection diodes are turned on, the on/off state of the control switch 1 is triggered, and the type of the trigger control switch 1 being turned on can be determined by the main control module 4, so that further controls the on/off state of the power supply, or starts the water drop emergency help function.
Specifically, referring to fig. 2, the th detection diode D1 and the second detection diode D2 are both cascode diodes, the th detection diode D1 includes a th anode D3-1 and a second anode D3-2, the second detection diode D2 includes a third anode D1-1 and a fourth anode D1-2, wherein the th anode D3-1 is connected to the drowning detection terminal WATER-DETECT, the second anode D3-2 is connected to the third anode D1-1 and to the control terminal of the control switch 1, the fourth anode D1-2 is connected to the key detection terminal PWR-DETECT and to the third anode D3-1, the th anode D3-1 and the fourth anode D1-2 are further connected to an input power source s, wherein the second anode D3-2 and the third anode D1-2 are connected to the main control terminal PWR-vddr-30-2 of the third anode control module.
The second positive electrode D3-2 and the third positive electrode D1-1 participate in the direct control of the control terminal of the control switch 1, and the positive electrode D3-1 and the fourth positive electrode D1-2 participate in the function of acquiring the trigger signal by the main control module 4 through the detection of the voltage thereof.
For example, when the power key SW1 is pressed, the key detection terminal PWR-DETECT is switched from high voltage to low voltage, and the WATER detection terminal WATER-DETECT maintains a high voltage state, the main control module 4 can determine that the key signal is triggered by pressing the power key SW1 according to the above change, and at this time, can execute a power-on or power-off program corresponding to the power key SW 1; otherwise, when the WATER-falling trigger terminal DETECT is turned on and triggered, the WATER-falling detection terminal WATER-DETECT is switched from a high voltage to a low voltage, and the key detection terminal PWR-DETECT maintains a high voltage state, the main control module 4 can determine that the key signal is triggered by the WATER-falling trigger terminal DETECT according to the change, and can execute the emergency help-seeking program after the WATER falls.
The falling-into-water detection module and the key detection module are integrated at the same time, and the control switch of the power supply is controlled by the main control module at the same time, so that the power supply control circuit can realize the control of the power supply switch and the falling-into-water triggering function at the same time. In addition, the power supply control circuit does not need to independently design circuits related to the drowning detection function, so that the circuit layout is simpler, and the manufacturing cost of the product is reduced.
Referring to fig. 3, a structure of an emergency portable terminal according to an embodiment of the present application is shown.
As shown in fig. 3, the emergency portable terminal 100 includes a housing 10, a power supply 20 provided in the housing, a power supply control circuit 30, a back-end circuit 40, and a water drop contact 50 provided on the side of the housing .
It will be appreciated that the water drop contact 50 of the emergency portable terminal may be located on the top, back or other location of the housing 10 in addition to the bottom location of the housing 10 as shown in fig. 2.
The emergency portable terminal 100 may be an emergency portable terminal 100 with an alarm function, such as a mobile phone, a positioning device, etc., and the specific carrier form is not limited, in embodiments, the emergency portable terminal 100 may include a main control module, a memory electrically connected to the main control module, and corresponding functional components, such as a display screen, a sensor, a speaker, a wireless communication module, a satellite communication module, and functional components of the positioning module, where the main control module, the memory, and the functional components are all located in the housing 10.
Specifically, the power control circuit 30 includes a control switch, a key detection module, a water falling detection module, and a main control module.
The control switch is connected between the power input end and the back-end circuit 40, and is used for controlling on/off between the power input end and the back-end circuit 40. And the key detection module is connected with the control end of the control switch and comprises a power supply key, and the key detection module is used for generating a key signal triggered by the power supply key. And the water falling detection module is connected with the control end of the control switch and comprises a water falling trigger end, and the water falling detection module is used for generating a water falling signal triggered by the water falling trigger end. And the main control module is connected with the key detection module, the water falling detection module and the control switch and is used for controlling the control switch to be turned on or turned off according to the detection conditions of the key detection module and the water falling detection module.
The power supply 20 is connected to the back-end circuit 40 via the power control circuit 30;
the positive electrode of the water falling contact 50 is connected with the water falling trigger end of the water falling detection module, and the negative electrode of the water falling contact 50 is connected with the reference ground of the water falling detection module.
Specifically, the power control circuit 30 may refer to any implementation manners of the power control circuit described in fig. 1-2, and details of this application are not repeated herein.
As can be seen from the above, in the emergency portable terminal in the embodiment of the present application, the drowning detection module and the key detection module are integrated in the power control circuit , and the distinction of the trigger signals generated by the two modules is realized through the main control module, and it is not necessary to independently design the circuit related to the drowning detection function, so that the circuit layout is simpler, and the manufacturing cost of the product is reduced.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.
Claims (10)
1, A power supply control circuit, comprising:
the control switch is connected between a power supply input end and the back-end circuit and used for controlling the on-off between the power supply input end and the back-end circuit;
the key detection module is connected with the control end of the control switch and comprises a power supply key, and the key detection module is used for generating a key signal triggered by the power supply key;
the water falling detection module is connected with the control end of the control switch and comprises a water falling trigger end, and the water falling detection module is used for generating a water falling signal triggered by the water falling trigger end; and
and the main control module is connected with the key detection module, the water falling detection module and the control switch and is used for controlling the control switch to be turned on or turned off according to the detection conditions of the key detection module and the water falling detection module.
2. The power control circuit of claim 1, wherein the control switch comprises an th MOS transistor and a second MOS transistor, wherein:
the th MOS tube is connected between the power supply input end and the back-end circuit;
the second MOS tube is connected between the gate of the th MOS tube and a reference ground, and the gate of the second MOS tube is connected with the power supply control end of the main control module.
3. The power control circuit of claim 2, wherein a pull-down resistor is disposed between the gate of the second MOS transistor and the reference ground.
4. The power control circuit of claim 2, wherein an LDO chip for voltage regulation and a filter module are connected in series between the back-end circuit and the th MOS transistor.
5. The power control circuit of claim 1, wherein:
the button detection module includes:
the anode of the detection diode is connected with the control end of the control switch, and the cathode of the detection diode is connected with the reference ground through the power supply key joint;
the drowning detection module includes:
and the anode of the second detection diode is also connected with the water falling detection end of the main control module and the anode of the detection diode.
6. The power control circuit of claim 5, wherein an input power is provided between the anode of the th sense diode and the anode of the second sense diode;
a resistor is connected in series between the input power source and the anode of the th detection diode, and the drowning detection end is connected between the th resistor and the anode of the th detection diode;
and a second resistor is connected in series between the input power supply and the anode of the second detection diode, and the key detection end is connected between the second resistor and the anode of the second detection diode.
7. The power control circuit as claimed in claim 5 or 6, wherein said th sense diode and said second sense diode are both cascode diodes;
the th sense diode includes a th anode and a second anode, the second sense diode includes a third anode and a fourth anode, wherein:
the th positive electrode is connected with the drowning detection end;
the second positive electrode is connected with the third positive electrode and is connected with the control end of the control switch;
the fourth positive electrode is connected with the key detection end and the th positive electrode;
an input power supply is also connected between the th positive electrode and the fourth positive electrode.
An emergency portable terminal of the kind , comprising:
a housing;
the power supply, the power supply control circuit and the rear end circuit are arranged in the shell;
a water drop contact disposed on the side of the housing ;
wherein the power control circuit comprises:
the control switch is connected between a power supply input end and the back-end circuit and used for controlling the on-off between the power supply input end and the back-end circuit;
the key detection module is connected with the control end of the control switch and comprises a power supply key, and the key detection module is used for generating a key signal triggered by the power supply key;
the water falling detection module is connected with the control end of the control switch and comprises a water falling trigger end, and the water falling detection module is used for generating a water falling signal triggered by the water falling trigger end; and
the main control module is connected with the key detection module, the water falling detection module and the control switch and is used for controlling the control switch to be turned on or turned off according to the detection conditions of the key detection module and the water falling detection module;
the power supply is connected with the back end circuit through the power supply control circuit;
the positive pole of the water falling contact is connected with the water falling triggering end of the water falling detection module, and the negative pole of the water falling contact is connected with the reference ground of the water falling detection module.
9. The emergency portable terminal according to claim 8, wherein the control switch comprises an th MOS transistor and a second MOS transistor, wherein:
the th MOS tube is connected between the power supply input end and the back-end circuit;
the second MOS tube is connected between the gate of the th MOS tube and a reference ground, and the gate of the second MOS tube is connected with the power supply control end of the main control module.
10. An emergency portable terminal according to claim 8, wherein:
the button detection module includes:
the anode of the detection diode is connected with the control end of the control switch, and the cathode of the detection diode is connected with the reference ground through the power supply key joint;
the drowning detection module includes:
and the anode of the second detection diode is also connected with the water falling detection end of the main control module and the anode of the detection diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921105446.5U CN210007686U (en) | 2019-07-16 | 2019-07-16 | power supply control circuit and emergency portable terminal thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921105446.5U CN210007686U (en) | 2019-07-16 | 2019-07-16 | power supply control circuit and emergency portable terminal thereof |
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| CN210007686U true CN210007686U (en) | 2020-01-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821504A (en) * | 2021-02-01 | 2021-05-18 | 深圳市南霸科技有限公司 | Emergency starting power supply |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821504A (en) * | 2021-02-01 | 2021-05-18 | 深圳市南霸科技有限公司 | Emergency starting power supply |
| CN112821504B (en) * | 2021-02-01 | 2021-09-14 | 深圳市南霸科技有限公司 | Emergency starting power supply |
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