CN219458699U - Low power consumption circuit of battery powered device - Google Patents
Low power consumption circuit of battery powered device Download PDFInfo
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- CN219458699U CN219458699U CN202320101418.6U CN202320101418U CN219458699U CN 219458699 U CN219458699 U CN 219458699U CN 202320101418 U CN202320101418 U CN 202320101418U CN 219458699 U CN219458699 U CN 219458699U
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Abstract
The utility model discloses a low-power-consumption circuit of battery power supply equipment, which comprises a control circuit, wherein the control circuit comprises a V_BAT end, a V_BATOUT end, a charging detection end, a starting control end and a charging detection reading end; a switching tube Q1 is connected in series between the V_BAT end and the V_BATOUT end; the charging detection end is connected to the control end of the switching tube Q2, one end of the switching tube Q2 is connected to the diode D1 and the cathode of the diode D2, and the anode of the diode D2 is connected with the charging detection reading end and the Vmcu end; the starting control end is connected to the control end of the switching tube Q3; the anode of the diode D1 and one end of the switching tube Q3 are connected to form a node, and the node is connected with the control end of the switching tube Q1; the other end of the switching tube Q2 and the other end of the switching tube Q3 are connected with each other and grounded. The utility model has the characteristics of simple structure and low standby power consumption.
Description
Technical Field
The present utility model relates to a low power circuit, and more particularly, to a low power circuit of a battery powered device.
Background
For battery-powered devices, such as electric toothbrushes, fascia guns, shavers, remote controllers, etc., because of the limited lifetime of the battery, while in the standby state of the device, although some of the high-power consumption circuits are turned off to reduce standby power consumption, the battery still supplies standby current of tens microamps and milliamperes to the main control chip, and some of the logic circuits, standby light circuits, etc. still consume power continuously, so that the power consumption in standby is still large, the standby time of the device is shortened, and the service life of the battery is reduced.
Disclosure of Invention
The utility model aims to provide a low-power-consumption circuit of battery power supply equipment.
The utility model has the characteristics of simple structure and low standby power consumption.
The technical scheme of the utility model is as follows: the low-power-consumption circuit of the battery power supply equipment comprises a control circuit, wherein the control circuit comprises a V_BAT end, a V_BATOUT end, a charging detection end, a starting control end and a charging detection reading end; a switching tube Q1 is connected in series between the V_BAT end and the V_BATOUT end; the charging detection end is connected to the control end of the switching tube Q2, one end of the switching tube Q2 is connected to the diode D1 and the cathode of the diode D2, and the anode of the diode D2 is connected with the charging detection reading end and the Vmcu end; the starting control end is connected to the control end of the switching tube Q3, a plurality of additional diodes are connected in parallel on the switching tube Q3, and the cathodes of the additional diodes are connected in series with a switch; the positive electrode of the diode D1, one end of the switching tube Q3 and the positive electrode of the additional diode are connected to form a node, and the node is connected with the control end of the switching tube Q1; the other end of the switch tube Q2 and the other end of the switch tube Q3 are connected with the other end of the switch and grounded.
In the foregoing low power consumption circuit of the battery power supply device, the additional diode includes a diode D3 and a diode D5, the switch includes a switch K1 and a switch K2, the diode D3 and the diode D5 are connected in parallel, the diode D3 is connected in series with the switch K1, and the diode D5 is connected in parallel with the switch K2.
In the foregoing low power consumption circuit of the battery power supply apparatus, the control circuit further includes a diode D4, a cathode of the diode D4 is connected between the diode D3 and the switch K1, and an anode of the diode D4 is connected to the acceleration control reading terminal and the Vmcu terminal.
In the foregoing low power consumption circuit of the battery power supply apparatus, the control circuit further includes a diode D6, a cathode of the diode D6 is connected between the diode D5 and the switch K2, and an anode of the diode D6 is connected to the heating control reading terminal and the Vmcu terminal.
In the low-power-consumption circuit of the battery power supply device, the switching tube Q1, the switching tube Q2 and the switching tube Q3 are MOS tubes or triodes.
In the low-power-consumption circuit of the battery power supply device, the switching tube Q1 is a MOS tube, and the switching tube Q2 and the switching tube Q3 are all triodes; the V_BAT end is connected with the source electrode of the MOS tube Q1, and the V_BATOUT end is connected with the drain electrode of the MOS tube Q1; the charging detection end is connected with the base electrode of the triode Q2, and the emitter electrode of the triode Q2 is connected with the cathodes of the diode D1 and the diode D2; the starting control end is connected with the base electrode of the triode Q3, and the collector electrode of the triode Q2 and the emitter electrode of the triode Q3 are grounded.
In the foregoing low power consumption circuit of the battery powered device, the control circuit further includes a plurality of resistors.
The low-power-consumption circuit of the battery power supply device further comprises a charging circuit connected with the charging detection end, wherein a CN1 terminal of the charging circuit is connected with the battery, and a CN2 terminal of the charging circuit is connected with the charger.
The low-power-consumption circuit of the battery power supply device further comprises a voltage reduction circuit, one end of the voltage reduction circuit is connected with the V_BATOUT end, the other end of the voltage reduction circuit is connected with the Vmcu end, and the voltage reduction circuit is used for converting the V_BATOUT into the Vmcu.
The low-power-consumption circuit of the battery power supply equipment further comprises an MCU which is respectively connected with the startup control end, the charging detection reading end, the acceleration control reading end and the heating control reading end through interfaces.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, a circuit is formed by the association and matching of a plurality of switching tubes and diodes, when equipment is not charged and does not work or stand by, a signal of a charging detection end is low level, a signal of a starting control end is low level, the switching tube Q1, the switching tube Q2 and the switching tube Q3 are not conducted, no current passes through the diodes, all equipment and power utilization circuits connected with a battery are cut off, and zero power consumption is basically achieved.
The utility model also designs a plurality of additional diodes and switches connected in series with the additional diodes, after the switches are pressed down, the negative poles of the additional diodes are grounded and pulled down, the switching tube Q1 is conducted, and the V_BATOUT end is electrified, so that Vmcu is electrified. After MCU has the electricity, the corresponding start control end outputs high level to make switch tube Q3 switch on, the node is continuously pulled down, MCU continuously has the electricity, and the switch loosens the power that also does not influence MCU this moment, and equipment normally has the electricity work, and MCU carries out the operation of relevant function, thereby can realize a plurality of switches respectively or trigger simultaneously and begin work simultaneously, and the application is nimble.
When the equipment is charged, the switching tube Q2 and the switching tube Q1 are conducted, so that the whole equipment is powered, and the MCU is powered, so that different functions can be controlled to operate.
The circuit system is relatively simple, the power consumption is very low in standby, and the service life of the battery is long.
Drawings
FIG. 1 is a control circuit diagram of the present utility model;
fig. 2 is a charging circuit diagram of the present utility model;
FIG. 3 is a voltage step-down circuit diagram of the present utility model;
fig. 4 is a diagram of an MCU of the present utility model.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Examples:
as shown in fig. 1 to 4, the low power consumption circuit of the battery power supply device includes a control circuit, where the control circuit includes a v_bat terminal, a charge detection terminal, a start control terminal, a charge detection reading terminal, a MOS transistor Q1, a triode Q2, and a triode Q3; the V_BAT end is connected with the source electrode of the MOS tube Q1, and the V_BATOUT end is connected with the drain electrode of the MOS tube Q1; the charging detection end is connected with the base electrode of the triode Q2, the emitter electrode of the triode Q2 is connected to the diode D1 and the cathode electrode of the diode D2, and the anode electrode of the diode D2 is connected with the charging detection reading end and the Vmcu end; the starting control end is connected with the base electrode of the triode Q3, the triode Q3 is connected with a diode D3 and a diode D5 in parallel, the cathode of the diode D3 is connected with a switch K1 in series, and the cathode of the diode D5 is connected with a switch K2 in series; the positive electrode of the diode D1, the collector electrode of the triode Q3, the positive electrode of the diode D3 and the positive electrode of the diode D5 are connected to form a node, and the node is connected with the grid electrode of the MOS tube Q1; the collector of the triode Q2 and the emitter of the triode Q3 are connected with the other ends of the switch K1 and the switch K2 and grounded.
The control circuit also comprises a diode D4, wherein the cathode of the diode D4 is connected between the diode D3 and the switch K1, and the anode of the diode D4 is connected to the acceleration control reading end and the Vmcu end
The control circuit further comprises a diode D6, wherein the cathode of the diode D6 is connected between the diode D5 and the switch K2, and the anode of the diode D6 is connected to the heating control reading end and the Vmcu end.
The output current of the V_BATOUT terminal supplies power for the power utilization load of the whole device.
The control circuit further includes a plurality of resistors. As shown in fig. 1, the resistors include a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, and a resistor R8. One end of a resistor R1 is connected with the V_BAT end, the other end of the resistor R2 is connected with a node, one end of the resistor R2 is connected with the grid electrode of the MOS tube Q1, and the other end of the resistor R2 is connected with the node; one end of a resistor R3 is connected with the charging detection end, and the other end of the resistor R3 is connected with the base electrode of a triode Q2; one end of a resistor R4 is connected with the positive electrode of the diode D2, and the other end of the resistor R4 is connected with the Vmcu end; one end of a resistor R5 is connected with the starting control end, and the other end of the resistor R5 is connected with the base electrode of a triode Q3; one end of a resistor R6 is connected with the base electrode of the triode Q3, and the other end of the resistor R6 is grounded; the positive electrode of a diode D4 at one end of a resistor R7 is connected, and the other end of the resistor R7 is connected with the Vmcu end; one end of the resistor R8 is connected to the positive electrode of the diode D6, and the other end of the resistor R8 is connected to the Vmcu end.
The MOS transistor Q1 adopts PMOS, the model of the triode Q2 is 8550 triode, and the model of the triode Q3 is 8050 triode.
The charging circuit is connected with the charging detection end, and a CN1 terminal of the charging circuit is connected with the battery to charge the battery; the CN2 terminal of the charging circuit is connected with a charger for supplying power.
The voltage reducing circuit is used for converting the V_BATOUT into the Vmcu, and the Vmcu end supplies power for the MCU.
The intelligent control system further comprises an MCU which is respectively connected with a startup control end, a charging detection reading end, an acceleration control reading end, a heating control reading end and a Vmcu end through interfaces.
Working principle: when the device is not charged and does not work, the MCU outputs a signal, the signal of the charging detection end is in a low level, the triode Q2 is not conducted, and the diode D1 does not flow current; the signal input to the control circuit by the starting control end is low level, and the triode Q3 is not conducted; neither switch K1 nor switch K2 is pressed, and no current flows through diode D3 nor diode D5, and at this time, MOS transistor Q1 is not turned on, and there is no voltage at the V_BATOUT terminal, and no voltage at the Vmcu terminal. The battery power is connected to any power consuming circuit, and the power consumption is almost 0.
When in standby, the MCU outputs a signal, the signal of the starting control end is in a low level, the MOS tube Q1, the triode Q2 and the triode Q3 are not conducted, the switch K1 and the switch K2 are not pressed down, all power utilization circuits are cut off from being connected to the battery, and the power supply of the MCU is also cut off, so that almost no electric quantity is consumed.
When the equipment starts to work, the switch K1 or the switch K2 is pressed down, in a short time of pressing, current passes through the diode D3 and the diode D5, the voltage of the node is the forward voltage drop value of the diode D3 or the diode D5, the grid electrode of the MOS tube Q1 is pulled down, the MOS tube Q1 is conducted, the voltage value of the V_BATOUT end=the voltage value of the V_BAT end, normal voltage appears in Vmcu, MCU has electricity to start to work, the signal of the startup control end is pulled up, the triode Q3 is conducted, the node is continuously pulled down, and the Q1 is kept in a conducting state. At this time, the switch K1 or the switch K2 is loosened, the MOS tube Q1 is always in a conducting state, and the equipment normally works with electricity.
The user presses and releases the switch K1 or the switch K2 for a short time, but it is enough to power up the MCU. At the same time, any key of the two keys of the switch K1 or the switch K2 is pressed, or the corresponding diode D4 or the diode D6 is pressed at the same time, the corresponding signal of the acceleration control reading end or the signal of the heating control reading end is pulled to the forward conduction voltage value of the diode D4 or the diode D6, and the forward conduction voltage value is regarded as a low level by the MCU, so that the MCU can operate the load function according to the switching function.
The pair of diodes D1 and D2 utilizes the forward conduction and reverse interception characteristics of the diodes, so that the control node signals of the MOS transistor Q1 and the charging detection reading signals are respectively controlled and are not interfered with each other; the same principle applies to both pairs of diodes D3 and D4 and diodes D5 and D6.
When the equipment is charged, the signal of the charging detection end output by the charging circuit is a high-level signal, so that the triode Q2 is conducted, the diode D1 is conducted, the node is pulled down, the MOS tube Q1 is conducted, the whole equipment is powered, the MCU is powered, and at the moment, some electric parts like a charging indicator lamp can be controlled to output instructions. Meanwhile, the diode D2 is conducted, the signal of the charging detection reading end is pulled down, and the MCU knows that the current state is the charging state, so that clear indication can be carried out.
The utility model is not described in detail in the prior art and is not specifically described herein.
Claims (10)
1. The low-power consumption circuit of battery powered equipment, its characterized in that: the control circuit comprises a V_BAT end, a V_BATOUT end, a charging detection end, a starting control end and a charging detection reading end; a switching tube Q1 is connected in series between the V_BAT end and the V_BATOUT end; the charging detection end is connected to the control end of the switching tube Q2, one end of the switching tube Q2 is connected to the diode D1 and the cathode of the diode D2, and the anode of the diode D2 is connected with the charging detection reading end and the Vmcu end; the starting control end is connected to the control end of the switching tube Q3, a plurality of additional diodes are connected in parallel on the switching tube Q3, and the cathodes of the additional diodes are connected in series with a switch; the positive electrode of the diode D1, one end of the switching tube Q3 and the positive electrode of the additional diode are connected to form a node, and the node is connected with the control end of the switching tube Q1; the other end of the switch tube Q2 and the other end of the switch tube Q3 are connected with the other end of the switch and grounded.
2. The low power circuit of a battery powered device of claim 1, wherein: the additional diode comprises a diode D3 and a diode D5, the switch comprises a switch K1 and a switch K2, the diode D3 and the diode D5 are connected in parallel, the diode D3 is connected with the switch K1 in series, and the diode D5 is connected with the switch K2 in parallel.
3. The low power circuit of a battery powered device of claim 2, wherein: the control circuit further comprises a diode D4, wherein the cathode of the diode D4 is connected between the diode D3 and the switch K1, and the anode of the diode D4 is connected to the acceleration control reading end and the Vmcu end.
4. The low power circuit of a battery powered device of claim 2, wherein: the control circuit further comprises a diode D6, wherein the cathode of the diode D6 is connected between the diode D5 and the switch K2, and the anode of the diode D6 is connected to the heating control reading end and the Vmcu end.
5. The low power circuit of a battery powered device of claim 1, wherein: the switching tube Q1, the switching tube Q2 and the switching tube Q3 are MOS tubes or triodes.
6. The low power circuit of a battery powered device of claim 5, wherein: the switching tube Q1 is an MOS tube, and the switching tube Q2 and the switching tube Q3 are triodes; the V_BAT end is connected with the source electrode of the MOS tube Q1, and the V_BATOUT end is connected with the drain electrode of the MOS tube Q1; the charging detection end is connected with the base electrode of the triode Q2, and the emitter electrode of the triode Q2 is connected with the cathodes of the diode D1 and the diode D2; the starting control end is connected with the base electrode of the triode Q3, and the collector electrode of the triode Q2 and the emitter electrode of the triode Q3 are grounded.
7. The low power circuit of a battery powered device of claim 1, wherein: the control circuit further includes a plurality of resistors.
8. The low power circuit of a battery powered device of claim 1, wherein: the charging device further comprises a charging circuit connected with the charging detection end, wherein a CN1 terminal of the charging circuit is connected with the battery, and a CN2 terminal of the charging circuit is connected with the charger.
9. The low power circuit of a battery powered device of claim 1, wherein: the voltage-reducing circuit is used for converting the V_BATOUT into the Vmcu.
10. The low power circuit of a battery powered device of claim 1, wherein: the intelligent control system further comprises an MCU which is respectively connected with a startup control end, a charging detection reading end, an acceleration control reading end, a heating control reading end and a Vmcu end through interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320101418.6U CN219458699U (en) | 2023-02-02 | 2023-02-02 | Low power consumption circuit of battery powered device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320101418.6U CN219458699U (en) | 2023-02-02 | 2023-02-02 | Low power consumption circuit of battery powered device |
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| Publication Number | Publication Date |
|---|---|
| CN219458699U true CN219458699U (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320101418.6U Active CN219458699U (en) | 2023-02-02 | 2023-02-02 | Low power consumption circuit of battery powered device |
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| CN (1) | CN219458699U (en) |
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2023
- 2023-02-02 CN CN202320101418.6U patent/CN219458699U/en active Active
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