CN209434933U - Charged state indicating circuit based on charging management chip - Google Patents
Charged state indicating circuit based on charging management chip Download PDFInfo
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- CN209434933U CN209434933U CN201920412956.0U CN201920412956U CN209434933U CN 209434933 U CN209434933 U CN 209434933U CN 201920412956 U CN201920412956 U CN 201920412956U CN 209434933 U CN209434933 U CN 209434933U
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- management chip
- charging management
- control port
- state indicating
- effect transistor
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Abstract
The utility model relates to Charge Management technical fields, the utility model is to solve the problems, such as that the GPIO port of existing charged state indicating circuit occupancy charging management chip is more, it is proposed a kind of charged state indicating circuit based on charging management chip, including charging management chip, further include: first state indicating circuit and the second condition indication circuit, the control port of the first state indicating circuit and the control port of charging management chip connect, the control port of second condition indication circuit includes the first control port and the second control port, first control port and the control port of charging management chip connect, second control port and the power input port of charging management chip connect.The utility model, which realizes a variety of charged state instructions, need to only occupy a GPIO port of charging management chip, and the port resource for reducing charging management chip occupies, suitable for the charging circuit with charging management chip.
Description
Technical field
The utility model relates to Charge Management technical fields, relate in particular to a kind of charged state indicating circuit.
Background technique
Charging management chip is the charging current of a kind of pair of battery or the chip of voltage progress strict control, is charged when passing through
When managing chip charges the battery, charging management chip controls the voltage and current of charging accordingly, for example, permanent
Current charge, constant-voltage charge etc., in addition, some charging management chips can be also used for the indices such as the capacitor to battery, temperature
It is detected, and then is controlled accordingly according to these indexs, for example, when detecting that battery temperature is more than specified value, hair
It alarms out and cuts off circuit.Charging management chip makes electric current and voltage all reach controllable state, can effectively control charging
The charged state in each stage, continuing to the service life of battery has apparent effect.
In the prior art, it can also be indicated by charged state of the charging management chip to battery, main skill
Art scheme is: being separately connected respectively with multiple status indicator lamps by multiple GPIO ports of charging management chip, Charge Management
The corresponding output high level of the multiple GPIO ports of chip controls or low level to carry out switch control, example to multiple status indicator lamps
Such as, when battery is in charged state, control point shiny red status indicator lamp, after battery is full of, control point bright green state
Indicator light allows users to the charged state for getting information about battery.But in this mode, various states instruction needs to occupy
The GPIO port of corresponding number has the GPIO port quantity of charging management chip in the case where needing to indicate various states
Certain requirement does not meet the development trend of charging management chip miniaturization.
Utility model content
The utility model aim to solve the problem that existing charged state indicating circuit occupy the GPIO port of charging management chip compared with
More problems proposes a kind of charged state indicating circuit based on charging management chip.
The utility model solves technical solution used by above-mentioned technical problem: the charging shape based on charging management chip
State indicating circuit, including charging management chip, further includes: first state indicating circuit and the second condition indication circuit, described
The control port of one condition indication circuit and the control port of charging management chip connect, the control of second condition indication circuit
Port processed includes the first control port and the second control port, the control port of first control port and charging management chip
The power input port of connection, second control port and charging management chip connects.
Further, to indicate the first charged state, the first state indicating circuit include: first resistor and
First light emitting diode, one end of the first resistor are the control port of first state indicating circuit, first resistor it is another
End is connect with the cathode of the first light emitting diode, and the anode of the first light emitting diode is connect with high level input port.
Further, to indicate the second charged state, second condition indication circuit includes: the first field-effect
Transistor, the second field effect transistor, second resistance, 3rd resistor and the second light emitting diode, first field effect transistor
The grid of pipe is the first control port of the second condition indication circuit, and the drain electrode of the first field effect transistor passes through second electricity
Resistance is connect with the cathode of the second light emitting diode, and the anode of the second light emitting diode is connect with high level input port, and first
The source electrode of effect transistor is connect with the drain electrode of one end of 3rd resistor and the second field effect transistor respectively, 3rd resistor it is another
One end is connect with high level input port, and the grid of the second field effect transistor is the second control terminal of the second condition indication circuit
Mouthful, the source electrode ground connection of the second field effect transistor.
Further, to avoid the second field effect transistor from damaging, second condition indication circuit further includes the 4th electricity
Resistance, which is characterized in that the grid of second field effect transistor passes through the 4th resistance eutral grounding.
It further, is the switch control for realizing circuit, first field effect transistor and the second field effect transistor
It is the enhanced metal-oxide-semiconductor of N-channel.
It further, is more intuitive display charged state, first light emitting diode is red light emitting diodes, described
Second light emitting diode is green LED.
The beneficial effects of the utility model are: the charged state instruction described in the utility model based on charging management chip
Second control port of circuit, the control port of first state indicating circuit and the second condition indication circuit respectively with Charge Management
The control port of chip connects, by first state indicating circuit and the second charged state indicating circuit respectively to the charging of battery
In, fully charged and off-position indicated that need to only be occupied by realizing the instruction of a variety of charged states by one of charging management chip
GPIO port, the port resource for reducing charging management chip occupy, and keep the cost of charging management chip lower, volume is smaller.
Detailed description of the invention
Fig. 1 is that the circuit of the charged state indicating circuit based on charging management chip described in the utility model embodiment shows
It is intended to；
Description of symbols:
R1- first resistor；R2- second resistance；R3- 3rd resistor；The 4th resistance of R4-；The first field effect transistor of D1-；
The second field effect transistor of D2-；The first light emitting diode of LED1-；The second light emitting diode of LED2-；GPIO- charging management chip
Control port；The power input port of VIN1- charging management chip；VIN2- high level input port.
Specific embodiment
The embodiments of the present invention is described in detail below in conjunction with attached drawing.
Charged state indicating circuit described in the utility model based on charging management chip, including charging management chip,
Further include: first state indicating circuit and the second condition indication circuit, the control port of the first state indicating circuit with fill
The control port of electric managing chip connects, and the control port of second condition indication circuit includes the first control port and second
The control port of control port, first control port and charging management chip connects, second control port and charging
The power input port of managing chip connects.
After the power input port input voltage of charging management chip, charging management chip is charged the battery, and fills
The GPIO port of electric managing chip exports low level, and the first light emitting diode is lighted at this time, and the second light emitting diode extinguishes, and indicates
Battery is in charged state；
When the power input port input voltage of charging management chip, and after battery has been filled with, charging management chip stops
Only charging to battery, the GPIO port of charging management chip exports high level, at this point, the first light emitting diode extinguishes, the second hair
Optical diode is lighted, and indicates that battery is in full state；
After the power input port no longer input voltage of charging management chip, the GPIO port of charging management chip is exported
High level, the first light emitting diode and two light emitting diodes extinguish, and the input of charging management chip no-voltage are indicated, in power-off
State.
Embodiment
Charged state indicating circuit described in the utility model embodiment based on charging management chip, as shown in Figure 1, packet
Include charging management chip, further includes: first state indicating circuit and the second condition indication circuit, the first state indicating circuit
Control port and charging management chip control port GPIO connection, the control port of second condition indication circuit includes
The control port GPIO connection of first control port and the second control port, first control port and charging management chip,
The power input port VIN1 connection of second control port and charging management chip.
Wherein, charging management chip has power input port VIN1 and control port GPIO, power input port VIN1
Input for power supply charges the battery in turn, and control port GPIO is for exporting high level or low level to state
Indicating circuit is controlled accordingly.
Optionally, first state indicating circuit may include: first resistor R1 and the first Light-emitting diode LED 1, and described
One end of one resistance R1 is the control port of first state indicating circuit, the other end of first resistor R1 and the first light emitting diode
The cathode of LED1 connects, and the anode of the first Light-emitting diode LED 1 is connect with high level input port VIN2.
Optionally, the second condition indication circuit may include: the first field effect transistor D1, the second field effect transistor
D2, second resistance R2,3rd resistor R3 and the second Light-emitting diode LED 2, the grid of the first field effect transistor D1 are the
The drain electrode of first control port of two-state indicating circuit, the first field effect transistor D1 passes through the second resistance R2 and second
The cathode of Light-emitting diode LED 2 connects, and the anode of the second Light-emitting diode LED 2 is connect with high level input port VIN2, the
The source electrode of one field effect transistor D1 is connect with the drain electrode of one end of 3rd resistor R3 and the second field effect transistor D2 respectively, the
The other end of three resistance R3 is connect with high level input port VIN2, and the grid of the second field effect transistor D2 is that the second state refers to
Show the second control port of circuit, the source electrode ground connection of the second field effect transistor D2.
In order to protect the second field effect transistor not to be damaged, the second condition indication circuit can also include the 4th resistance
The grid of R4, the second field effect transistor D2 are grounded by the 4th resistance R4, and the 4th resistance R4 is divider resistance.
Wherein, the first field effect transistor D1 and the second field effect transistor D2 all can be the enhanced metal-oxide-semiconductor of N-channel,
First Light-emitting diode LED 1 can be red light emitting diodes, and the second Light-emitting diode LED 2 can be two pole of green emitting
Pipe.
Its circuit theory is: after the power input port VIN1 input voltage of charging management chip, passing through battery management
Chip charges the battery, according to the GPIO port characteristic of charging management chip, the control port GPIO of battery management chip
Low level is exported, the first light emitting diode has electric current to pass through in illuminating state, and the grid of the first field effect transistor D1 inputs
Low level cut-off, the grid input high level conducting of the second field effect transistor D2, therefore the second Light-emitting diode LED 2 does not have
Electric current, which passes through, is in OFF state, at this point, the first Light-emitting diode LED 1 is in illuminating state, at the second Light-emitting diode LED 2
In OFF state, indicate that battery is in charged state；
Continue input voltage in the power input port VIN1 of charging management chip, and when battery fills with, according to
The control port GPIO of the GPIO port characteristic of charging management chip, battery management chip exports high level, the first light-emitting diodes
Pipe LED1 no current, which passes through, is in OFF state, and the grid input high level of the first field effect transistor D1 is connected, second effect
The grid also input high level conducting of transistor D2 is answered, therefore, the second Light-emitting diode LED 2 has electric current to light shape by being in
State, at this point, the first Light-emitting diode LED 1 is in OFF state, the second Light-emitting diode LED 2 is in illuminating state, indicates electricity
Pond is in full state；
After the power input port VIN1 no longer input voltage of charging management chip, according to the GPIO of charging management chip
Port identity, the control port GPIO of battery management chip continue to output high level, 1 no current of the first Light-emitting diode LED warp
It crosses in OFF state, the grid input low level of the first field effect transistor D1 ends, the grid of the second field effect transistor D2
Also input low level ends for pole, and therefore, 2 no current of the second Light-emitting diode LED is by being also at OFF state, at this point, first
Light-emitting diode LED 1 and the second Light-emitting diode LED 2 are in OFF state, indicate the power input of charging management chip
Mouth VIN1 does not have input voltage, is in off-position.
Claims (6)
1. the charged state indicating circuit based on charging management chip, including charging management chip, which is characterized in that further include:
First state indicating circuit and the second condition indication circuit, the control port and Charge Management core of the first state indicating circuit
The control port of piece connects, and the control port of second condition indication circuit includes the first control port and the second control terminal
Mouthful, the control port of first control port and charging management chip connects, second control port and Charge Management core
The power input port of piece connects.
2. the charged state indicating circuit based on charging management chip as described in claim 1, which is characterized in that described first
Condition indication circuit includes: first resistor and the first light emitting diode, and one end of the first resistor is first state instruction electricity
The control port on road, the other end of first resistor are connect with the cathode of the first light emitting diode, the anode of the first light emitting diode
It is connect with high level input port.
3. the charged state indicating circuit based on charging management chip as claimed in claim 2, which is characterized in that described second
Condition indication circuit includes: the first field effect transistor, the second field effect transistor, second resistance, 3rd resistor and the second hair
Optical diode, the grid of first field effect transistor are the first control port of the second condition indication circuit, first effect
The drain electrode of transistor is answered to connect by the second resistance with the cathode of the second light emitting diode, the anode of the second light emitting diode
It is connect with high level input port, the source electrode of the first field effect transistor is brilliant with one end of 3rd resistor and the second field-effect respectively
The drain electrode of body pipe connects, and the other end of 3rd resistor is connect with high level input port, and the grid of the second field effect transistor is
Second control port of the second condition indication circuit, the source electrode ground connection of the second field effect transistor.
4. the charged state indicating circuit based on charging management chip as claimed in claim 3, which is characterized in that described second
Condition indication circuit further includes the 4th resistance, and the grid of second field effect transistor passes through the 4th resistance eutral grounding.
5. the charged state indicating circuit based on charging management chip as claimed in claim 3, which is characterized in that described first
Field effect transistor and the second field effect transistor are the enhanced metal-oxide-semiconductor of N-channel.
6. the charged state indicating circuit based on charging management chip as claimed in claim 3, which is characterized in that described first
Light emitting diode is red light emitting diodes, and second light emitting diode is green LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920412956.0U CN209434933U (en) | 2019-03-28 | 2019-03-28 | Charged state indicating circuit based on charging management chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920412956.0U CN209434933U (en) | 2019-03-28 | 2019-03-28 | Charged state indicating circuit based on charging management chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209434933U true CN209434933U (en) | 2019-09-24 |
Family
ID=67978903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920412956.0U Active CN209434933U (en) | 2019-03-28 | 2019-03-28 | Charged state indicating circuit based on charging management chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209434933U (en) |
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2019
- 2019-03-28 CN CN201920412956.0U patent/CN209434933U/en active Active
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Address after: 621000 Sichuan Ailian Technology Co., Ltd Patentee after: Sichuan Ailian Technology Co., Ltd Address before: 621000 Mianyang city of Sichuan Province, Sichuan Industrial Park, love science and Technology Co. Patentee before: SICHUAN AI-LINK TECHNOLOGY Co.,Ltd. |