CN212992000U - Battery power supply control circuit - Google Patents
Battery power supply control circuit Download PDFInfo
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- CN212992000U CN212992000U CN202021570219.2U CN202021570219U CN212992000U CN 212992000 U CN212992000 U CN 212992000U CN 202021570219 U CN202021570219 U CN 202021570219U CN 212992000 U CN212992000 U CN 212992000U
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Abstract
The utility model discloses a battery power supply control circuit mainly gives the switch of MCU in the electronic equipment and other device power supplies that need the power supply through the MOS pipe as group battery or power adapter, then switches on and breaks off through the combination control MOS pipe that adopts button and triode to realize electronic equipment's circular telegram and outage state. The utility model discloses can make electronic equipment realize the low current standby under battery powered's the condition, effectively increase electronic equipment's stand-by time, simultaneously, the utility model discloses a low-cost electron device, manufacturing cost that can greatly reduced electronic equipment.
Description
Technical Field
The utility model relates to a control circuit, in particular to battery powered control circuit.
Background
With the development of science and technology, portable electronic products are more and more. As consumers, the most concerned are the use time and standby time of portable electronic products. This problem is also always confusing for design engineers who try to choose a power management chip with a smaller quiescent current or a single chip with a smaller current in sleep mode in order to achieve longer use time and standby time, but this increases the production cost of the product.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a low-cost battery power supply control circuit aiming at the defects of the prior art.
The technical scheme is as follows: the invention provides a battery power supply control circuit, wherein one end of a first capacitor C1 is respectively connected with one end of a first resistor R1 and a source electrode of an MOS transistor Q1, the other end of the first capacitor C1 is respectively connected with the other end of the first resistor R1, a grid electrode of an MOS transistor Q1 and one end of a second resistor R2, and a drain electrode of the MOS transistor Q1 is an output end; the other end of the second resistor R2 is respectively connected with the anode of the first diode D1 and the collector of the triode Q2, the cathode of the first diode D1 is respectively connected with the cathode of the second diode D2, one end of the key SW1 and one end of the third C3 capacitor, and the other end of the key SW1 and the other end of the third C3 capacitor are grounded; the base electrode of the triode Q2 is respectively connected with one end of a fifth resistor R5, one end of a sixth resistor R6 and one end of a second capacitor C2, the other end of the second capacitor C2 and the other end of the sixth resistor R6 are grounded with the emitter electrode of the triode Q2, the other end of the fifth resistor R5 is connected with the cathode of a fourth diode D4, and the anode of the fourth diode D4 is connected with a first I/O pin of the single chip microcomputer; the anode of the second diode D2 is connected with one end of the third resistor R3 and the second I/O pin of the single chip microcomputer respectively, and the other end of the third resistor R3 is connected with the power supply pin of the single chip microcomputer.
Further, the device also comprises a third diode D3 and a fourth resistor R4, and the cathode of the third diode D3 is connected with one end of the fifth resistor R5 through the fourth resistor R4. Therefore, when the power adapter is adopted to supply power and charge the battery, the charging state and the electric quantity of the battery can be displayed because the MCU is always in the working state, and the use is more convenient.
Further, the model of the first diode D1, the second diode D2 and the fourth diode D4 is 1N 4148.
Further, the model of the third diode D3 is 1N 4148. The diode with the type can ensure the effect and reduce the production cost of the circuit at the same time.
The working principle is as follows: the utility model discloses in give the switch of the device power supply of MCU and other needs supplies power in the electronic equipment as group battery or power adapter through the MOS pipe, then through the switch on and off of the combination control MOS pipe that adopts button and triode to realize electronic equipment's circular telegram and off-state.
Has the advantages that: the utility model discloses can make electronic equipment realize the low current standby under battery powered's the condition, effectively increase electronic equipment's stand-by time, simultaneously, the utility model discloses a low-cost electron device, manufacturing cost that can greatly reduced electronic equipment.
Drawings
FIG. 1 is a schematic circuit diagram of embodiment 1;
fig. 2 is a circuit diagram of embodiment 2.
Detailed Description
Reference will now be made in detail to the accompanying drawings.
Example 1:
as shown in fig. 1, embodiment 1 discloses a battery power supply control circuit, wherein one end of a first capacitor C1 is connected to one end of a first resistor R1 and the source of a MOS transistor Q1, the other end of the first capacitor C1 is connected to the first resistor R1, the gate of the MOS transistor Q1, and one end of a second resistor R2, and the drain of the MOS transistor Q1 is connected to the input terminal of a dc converter and other devices requiring power supply; the other end of the second resistor R2 is respectively connected with the anode of the first diode D1 and the collector of the triode Q2, the cathode of the first diode D1 is respectively connected with the cathode of the second diode D2, one end of the key SW1 and one end of the third C3 capacitor, and the other end of the key SW1 and the other end of the third C3 capacitor are grounded; the base electrode of the triode Q2 is respectively connected with one end of a fifth resistor R5, one end of a sixth resistor R6 and one end of a second capacitor C2, the other end of the second capacitor C2 and the other end of the sixth resistor R6 are both grounded with the emitter electrode of the triode Q2, the other end of the fifth resistor R5 is respectively connected with one end of a fourth resistor R4 and the cathode of a fourth diode D4, the anode of the fourth diode D4 is connected with a first I/O pin of a single chip microcomputer (MCU for short in the following description), the other end of the fourth resistor R4 is connected with the cathode of a third diode D3, and the anode of the third diode D3 is connected with a battery management chip; the anode of the second diode D2 is connected to one end of the third resistor R3 and the second I/O pin of the single chip microcomputer, the other end of the third resistor R3 is connected to the output end of the dc converter, and the output end of the dc converter is connected to the power pin of the single chip microcomputer. The battery management chip is connected with a third I/O pin of the single chip microcomputer.
The battery management chip can adopt models of SY6932, BQ24610 and the like. The first diode D1, the second diode D2, the third diode D3 and the fourth diode D4 are all diodes of type 1N 4148. MOS transistor Q1 can be of SSFN3903, AO4459, CSD25402Q3A, APM2301 and the like, and triode Q2 can be of MMBT3904, C1815 and the like.
With the electronic device using the battery power supply control circuit provided in embodiment 1, when only the battery is powered and the MCU is in the power-off state, the Key SW1 is pressed, and both the node Key and the node Key _ DET are in the low level state, and at this time, the MOS transistor Q1 is turned on. The battery pack supplies power to other devices in the electronic equipment through the MOS transistor Q1, meanwhile, input voltage is provided for a direct current Converter (hereinafter referred to as DC/DC Converter), then the DC/DC Converter provides power voltage for the MCU, the MCU starts up and starts to normally operate, and the MCU sets the first pin to be at a high level, namely, the Standby node is at a high level. Because the Standby node is at high level, the triode Q2 is conducted; at this moment, the Key button SW1 is released, the node Key _ DET recovers the high level, the transistor Q2 is turned on, so the MOS transistor Q1 is still turned on, the battery can still supply power to other devices in the electronic device through the MOS transistor Q1, and simultaneously provides input voltage for the DC/DC Converter, and then the DC/DC Converter can continue to provide power voltage for the MCU, the MCU keeps normal operation, and the electronic device continues to keep the power-on state. When the MCU is in a power-on state, a Key SW1 is pressed, the node Key and the node Key _ DET are both changed into a low level state, and when the MCU is in the power-on state and the Key _ DET is detected to be in the low level, the MCU sets the first pin to be in the low level, namely, the Standby node is in the low level; because the Standby node is at low level, the triode Q2 is not conducted; when the Key SW1 is released, the Key is at high level, the MOS transistor Q1 is not conducted, the battery can not provide power supply voltage for the MCU and other devices, the MCU is powered off, and the electronic equipment is in a closed state.
The MCU is connected to the power adapter in a power-on/power-off state, the power adapter is respectively connected with the anode of the third diode and the battery management chip, namely, the power adapter enters a battery charging state, meanwhile, the triode Q2 is in a conducting state, the MOS tube Q1 is also in a conducting state, the power adapter charges the battery through the battery management chip, meanwhile, the power adapter provides input voltage for the DC/DC Converter through the MOS tube Q1, then the DC/DC Converter provides power voltage for the MCU, the MCU can normally operate, and the power adapter also supplies power for other devices in the electronic equipment through the MOS tube Q1; at this time, the MCU detects the state of charge of the battery through the Bat _ Status node to illuminate the LED to indicate the state of charge and the state of charge.
Example 2:
as shown in fig. 2, embodiment 2 discloses a battery power supply control circuit, wherein one end of a first capacitor C1 is connected to one end of a first resistor R1 and the source of a MOS transistor Q1, the other end of the first capacitor C1 is connected to the first resistor R1, the gate of the MOS transistor Q1, and one end of a second resistor R2, and the drain of the MOS transistor Q1 is connected to the input terminal of the dc converter and other devices requiring power supply; the other end of the second resistor R2 is respectively connected with the anode of the first diode D1 and the collector of the triode Q2, the cathode of the first diode D1 is respectively connected with the cathode of the second diode D2, one end of the key SW1 and one end of the third C3 capacitor, and the other end of the key SW1 and the other end of the third C3 capacitor are grounded; the base electrode of the triode Q2 is respectively connected with one end of a fifth resistor R5, one end of a sixth resistor R6 and one end of a second capacitor C2, the other end of the second capacitor C2 and the other end of the sixth resistor R6 are grounded with the emitter electrode of the triode Q2, the other end of the fifth resistor R5 is connected with the cathode of a fourth diode D4, and the anode of the fourth diode D4 is connected with a first I/O pin of the MCU; the anode of the second diode D2 is connected to one end of the third resistor R3 and the second I/O pin of the single chip microcomputer, the other end of the third resistor R3 is connected to the output end of the dc converter, and the output end of the dc converter is connected to the power pin of the single chip microcomputer.
The battery management chip can adopt models of SY6932, BQ24610 and the like. The first diode D1, the second diode D2, and the fourth diode D4 are all diodes of type 1N 4148. MOS transistor Q1 can be of SSFN3903, AO4459, CSD25402Q3A, APM2301 and the like, and triode Q2 can be of MMBT3904, C1815 and the like.
With the electronic device using the battery power supply control circuit provided in embodiment 2, when only the battery is powered and the MCU is in the power-off state, the Key SW1 is pressed, and both the node Key and the node Key _ DET are in the low level state, and at this time, the MOS transistor Q1 is turned on. The battery pack supplies power to other devices in the electronic equipment through the MOS transistor Q1, and simultaneously provides input voltage for the direct DC/DC Converter, then the DC/DC Converter provides power voltage for the MCU, the MCU starts up and starts normal operation, the MCU sets the first pin to be at a high level, namely, the Standby node is at the high level. Because the Standby node is at high level, the triode Q2 is conducted; at this moment, the Key button SW1 is released, the node Key _ DET recovers the high level, the transistor Q2 is turned on, so the MOS transistor Q1 is still turned on, the battery can still supply power to other devices in the electronic device through the MOS transistor Q1, and simultaneously provides input voltage for the DC/DC Converter, and then the DC/DC Converter can continue to provide power voltage for the MCU, the MCU keeps normal operation, and the electronic device continues to keep the power-on state. When the MCU is in a power-on state, a Key SW1 is pressed, the node Key and the node Key _ DET are both changed into a low level state, and when the MCU is in the power-on state and the Key _ DET is detected to be in the low level, the MCU sets the first pin to be in the low level, namely, the Standby node is in the low level; because the Standby node is at low level, the triode Q2 is not conducted; when the Key SW1 is released, the Key is at high level, the MOS transistor Q1 is not conducted, the battery can not provide power supply voltage for the MCU and other devices, the MCU is powered off, and the electronic equipment is in a closed state.
When the power adapter is connected, the battery enters a charging state, and the power adapter charges the battery through the charging management chip; when the MCU is in the power-off state, the Key SW1 is pressed, the node Key and the node Key _ DET are both in the low level state, and at this time, the MOS transistor Q1 is turned on. The power adapter supplies power to other devices in the electronic equipment through the MOS pipe Q1, and simultaneously provides input voltage for the direct DC/DC Converter, then the DC/DC Converter provides power voltage for the MCU, the MCU starts up, starts normal operation, and the MCU sets the first pin to be high level, namely the Standby node is high level. Because the Standby node is at high level, the triode Q2 is conducted; at this moment, the Key button SW1 is released, the node Key _ DET recovers the high level, the transistor Q2 is turned on, so the MOS transistor Q1 is still turned on, the power adapter can still supply power to other devices in the electronic device through the MOS transistor Q1, and simultaneously provide input voltage for the DC/DC Converter, and then the DC/DC Converter can continue to provide power voltage for the MCU, the MCU keeps normal operation, and the electronic device continues to maintain the power-on state. When the MCU is in a power-on state, a Key SW1 is pressed, the node Key and the node Key _ DET are both changed into a low level state, and when the MCU is in the power-on state and the Key _ DET is detected to be in the low level, the MCU sets the first pin to be in the low level, namely, the Standby node is in the low level; because the Standby node is at low level, the triode Q2 is not conducted; when the Key SW1 is released, the Key is at high level, the MOS transistor Q1 is not conducted, the power adapter cannot provide power voltage for the MCU and other devices, the MCU is powered off, and the electronic equipment is in a closed state.
In the above two embodiments, the output current of the battery in the whole electronic device is within 50uA, that is, the battery power supply control circuit provided in embodiment 1 and embodiment 2 can be applied to standby for about 6 years when the battery with 2600mAh is fully charged.
As above, while the invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A battery power supply control circuit, characterized by: one end of a first capacitor C1 is respectively connected with one end of a first resistor R1 and the source electrode of the MOS transistor Q1, the other end of the first capacitor C1 is respectively connected with the other end of a first resistor R1, the grid electrode of the MOS transistor Q1 and one end of a second resistor R2, and the drain electrode of the MOS transistor Q1 is an output end; the other end of the second resistor R2 is respectively connected with the anode of the first diode D1 and the collector of the triode Q2, the cathode of the first diode D1 is respectively connected with the cathode of the second diode D2, one end of the key SW1 and one end of the third C3 capacitor, and the other end of the key SW1 and the other end of the third C3 capacitor are grounded; the base electrode of the triode Q2 is respectively connected with one end of a fifth resistor R5, one end of a sixth resistor R6 and one end of a second capacitor C2, the other end of the second capacitor C2 and the other end of the sixth resistor R6 are grounded with the emitter electrode of the triode Q2, the other end of the fifth resistor R5 is connected with the cathode of a fourth diode D4, and the anode of the fourth diode D4 is connected with a first I/O pin of the single chip microcomputer; the anode of the second diode D2 is connected with one end of the third resistor R3 and the second I/O pin of the single chip microcomputer respectively, and the other end of the third resistor R3 is connected with the power supply pin of the single chip microcomputer.
2. The battery-powered control circuit of claim 1, wherein: the LED driving circuit further comprises a third diode D3 and a fourth resistor R4, wherein the cathode of the third diode D3 is connected with one end of the fifth resistor R5 through the fourth resistor R4.
3. The battery-powered control circuit of claim 1, wherein: the model of the first diode D1, the second diode D2 and the fourth diode D4 is 1N 4148.
4. The battery-powered control circuit of claim 2, wherein: the model of the third diode D3 is 1N 4148.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021570219.2U CN212992000U (en) | 2020-07-31 | 2020-07-31 | Battery power supply control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021570219.2U CN212992000U (en) | 2020-07-31 | 2020-07-31 | Battery power supply control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212992000U true CN212992000U (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021570219.2U Active CN212992000U (en) | 2020-07-31 | 2020-07-31 | Battery power supply control circuit |
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| Country | Link |
|---|---|
| CN (1) | CN212992000U (en) |
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2020
- 2020-07-31 CN CN202021570219.2U patent/CN212992000U/en active Active
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Address after: 211100 No.8 Kangping street, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu Province Patentee after: Hansang (Nanjing) Technology Co.,Ltd. Address before: 211100 No.8 Kangping street, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu Province Patentee before: HANSONG (NANJING) TECHNOLOGY CO.,LTD. |
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| CP01 | Change in the name or title of a patent holder |