CN206293928U - Use the single control circuit exported by key control DCDC with switching - Google Patents
Use the single control circuit exported by key control DCDC with switching Download PDFInfo
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- CN206293928U CN206293928U CN201621411787.1U CN201621411787U CN206293928U CN 206293928 U CN206293928 U CN 206293928U CN 201621411787 U CN201621411787 U CN 201621411787U CN 206293928 U CN206293928 U CN 206293928U
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Abstract
The utility model is related to a kind of single control circuit exported by key control DCDC with switching of use, it is characterized in that：Chip control circuit, MCU detections and control circuit and DC/DC output switchings control circuit are enabled including MOSFET pipes circuit, button, the button enables chip control circuit and is detected to MCU and control circuit offer pulsewidth interrupt signal, and the MCU detections and control circuit control DC/DC output switchings control circuit according to interrupt signal；The button enables chip control circuit control MOSFET pipe circuits, and the break-make of the MOSFET pipes circuit controls the output loop break-make of battery pack.Beneficial effect：Compared with prior art, the utility model has the advantages that few button, circuit reliable operation, low cost, small power consumption.It is structurally and operationally simple, you can meet miniaturization of the market to portable set structure, operates the demand of summary.
Description
Technical field
The utility model belongs to field of lithium, more particularly to a kind of is exported and switching by key control DCDC using single
Control circuit.
Background technology
Lithium ion battery output needs to be converted into various MCU or special use voltage, and voltage in several modes it
Between switched as needed by button, and be also required to by the button realize DC modules export start and stop.Present city
It is usually to use two buttons, one of button to realize the start and stop of DC modules on field, another button realizes that DC is defeated
Go out the switching of different voltages.With the development that market electronic product is advanced by leaps and bounds, it is desirable to portable set miniaturized structure, operation
It is eased.Lithium ion battery must adapt to and meet the demand in market.
Utility model content
The purpose of this utility model is to overcome the shortcomings of above-mentioned technology, and provides a kind of using single by key control DCDC
Output and the control circuit of switching, by a button controlled output, and realize cutting for voltage in several modes by the button
Change, realize the miniaturization of portable set structure, the summary of operation.
The utility model to achieve the above object, using following technical scheme：One kind uses single defeated by key control DCDC
Go out the control circuit with switching, it is characterized in that：Chip control circuit, MCU detections are enabled including MOSFET pipes circuit, button and control
Circuit processed and DC/DC output switchings control circuit,
The button enables chip control circuit and is detected to MCU and control circuit offer pulsewidth interrupt signal, the MCU inspections
Survey and control circuit controls DC/DC output switchings control circuit according to interrupt signal；
The button enables chip control circuit control MOSFET pipe circuits, the break-make control electricity of the MOSFET pipes circuit
The output loop break-make of pond group.
The button enables chip control circuit and uses button ON/OFF controller.
The button enable chip control circuit include button SW1, electric capacity C1, resistance R2, R7, R6, C5, C6, R3, R4,
The state that C2, R10 and button ON/OFF controller U1, wherein U1 crus secundas collection button SW1 are pressed or do not pressed；When pressing
When key SW1 presses for more than 3 seconds, the 6th pin output low level of U1 is controlled, when button SW1 is pressed again, if not less than 3 seconds, U1
The 5th pin output interrupt signal；If more than 3 seconds, controlling the 6th pin output high level of U1, control lithium ion battery to export back
Road is disconnected, and the pulsewidth of output is configured by C6 and C7.
Beneficial effect：Compared with prior art, the utility model has few button, circuit reliable operation, low cost, power consumption
Small advantage.It is structurally and operationally simple, you can meet miniaturization of the market to portable set structure, operates the need of summary
Ask.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model；
Fig. 2 is lithium battery protection circuit schematic diagram；
Fig. 3 is LDO control circuit theory diagrams；
Fig. 4 is MCU control circuit schematic diagram.
In figure：U1, button ON/OFF controller, U2, DC/DC conversion and control chip, U3, Li battery protection IC,
U4, MCU control chip, U5, LDO control chip, Q1, lithium ion battery output loop control MOSFET pipes.
Specific embodiment
Specific embodiment of the present utility model is described in detail with reference to preferred embodiment.
Refer to accompanying drawing, the present embodiment is a kind of using the single control circuit exported by key control DCDC with switching, including
MOSFET pipes circuit, button enable chip control circuit, MCU detections and control circuit and DC/DC output switchings control circuit, institute
State button and enable chip control circuit to MCU detections and control circuit offer pulsewidth interrupt signal, the MCU detections and control are electric
Road controls DC/DC output switchings control circuit according to interrupt signal；The button enables chip control circuit control MOSFET pipes
Circuit, the break-make of the MOSFET pipes circuit controls the output loop break-make of battery pack.
The button enables chip control circuit and uses button ON/OFF controller, and model can be commercially available
LTC2954I-2, the button ON/OFF controller with microprocessor interrupt function.
The button enable chip control circuit include button SW1, electric capacity C1, resistance R2, R7, R6, C5, C6, R3, R4,
The state that C2, R10 and button ON/OFF controller U1, wherein U1 crus secundas collection button SW1 are pressed or do not pressed；When pressing
When key SW1 presses for more than 3 seconds, the 6th pin output low level of U1 is controlled, when button SW1 is pressed again, if not less than 3 seconds, U1
The 5th pin output interrupt signal；If more than 3 seconds, controlling the 6th pin output high level of U1, control lithium ion battery to export back
Road is disconnected, and the pulsewidth of output is configured by C6 and C7.
MOSFET pipes electricity routing resistance R1, R5 and triode Q1 are constituted, when button ON/OFF controller the 6th pin of U1 are defeated
When going out low level, the output loop conducting of control lithium ion battery, when U1 the 6th is output high level, control lithium ion battery is defeated
Go out loop disconnection.Triode Q1 selects commercially available model FDN360P.
MCU is detected and electric routing resistance R19, the C16 and U4 compositions of control.The heels of U4 the 11st enable chip controls electricity according to button
The interrupt signal control DC/DC output switching control circuits that the pin of road the 6th is provided.When first time there is interrupt signal DC/DC
The M2 conductings of output switching control circuit, lead the M1 of DC/DC output switchings control circuit when occurring interrupt signal for the second time
It is logical, occur iterative cycles during interrupt signal again.U4 selects commercially available model PLC16F1764-I/ST.
DC/DC output switchings control circuit is made up of R12, CFF1, COUT1, C9, R14, R15, R16, M1, M2.M1 by
MCU is detected and is controlled the foot control systems of U1 the 8th of circuit, and second gear output is switched to during conducting, and M2 is detected by MCU and controlled circuit
The foot control systems of U1 the 9th, are switched to third gear output during conducting, realize the switching of different output voltages.
The course of work
Lithium ion battery output loop is real with closing by the conducting of Q1 (lithium ion battery output loop control MOSFET is managed)
It is existing.Key control chip is powered by lithium ion battery, is controlled the conducting of Q1 and is closed by external key SW1.Work as external key
After SW1 is pressed, and the default time is maintained, Preset Time is controlled by external capacitive C6 and C2, DC/DC moulds are given in Q1 conductings
Block is powered, DC/DC modules output setting voltage value.DC/DC modules are powered to U5 (LDO control chips) simultaneously, and U5 turns voltage
Powered to MCU control chips after changing.On MCU control chips after electricity, button SW1 control signals are detected.Configuration U1 presses key control core
Piece external control circuit C6 and C2, make U1 according to button SW1 ON times, export inconsistent pulse width signal.MCU control chips
According to pulse width signal, DC/DC module output voltage backfeed loop reference voltages are controlled, realize the switching of different output voltages.
Operation principle：Voltage, discharge current are carried out to battery by lithium ion battery special integrated circuit to monitor, using pressing
Key enables the conducting of chip controls metal-oxide-semiconductor and closes, and realizes output and the break-make of lithium ion battery.By designing peripheral circuit,
Change the controlled output pulsewidth of button chip, controlled output pulsewidth is detected using MCU, according to the inconsistency of pulsewidth, realize DC
The output switching function of module.
It is above-mentioned this kind of is carried out using single output by key control DCDC with the control circuit of switching with reference to embodiment
Describe in detail, be it is illustrative can include several embodiments according to limited scope rather than limited, therefore not
Depart from changing and modifications under the utility model general plotting, should belong within protection domain of the present utility model.
Claims (3)
1. a kind of using the single control circuit exported by key control DCDC with switching, it is characterized in that：Including MOSFET pipes circuit,
Button enables chip control circuit, MCU detections and control circuit and DC/DC output switchings control circuit,
The button enables that chip control circuit is detected to MCU and control circuit provides pulsewidth interrupt signal, the MCU detections and
Control circuit controls DC/DC output switchings control circuit according to interrupt signal；
The button enables chip control circuit control MOSFET pipe circuits, the break-make control battery pack of the MOSFET pipes circuit
Output loop break-make.
2. according to claim 1 using the single control circuit exported by key control DCDC with switching, it is characterized in that：Institute
State button and enable chip control circuit using button ON/OFF controller.
3. according to claim 1 using the single control circuit exported by key control DCDC with switching, it is characterized in that：It is described
Button enables chip control circuit includes button SW1, electric capacity C1, resistance R2, R7, R6, C5, C6, R3, R4, C2, R10 and button
The state that ON/OFF controller U1, wherein U1 crus secundas collection button SW1 are pressed or do not pressed；When button SW1 is pressed for more than
At 3 seconds, the 6th pin output low level of U1 is controlled, when button SW1 is pressed again, if not less than 3 seconds, in the 5th pin output of U1
Break signal；If more than 3 seconds, controlling the 6th pin output high level of U1, control lithium ion battery output loop to disconnect, output
Pulsewidth is configured by C6 and C7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621411787.1U CN206293928U (en) | 2016-12-22 | 2016-12-22 | Use the single control circuit exported by key control DCDC with switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621411787.1U CN206293928U (en) | 2016-12-22 | 2016-12-22 | Use the single control circuit exported by key control DCDC with switching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206293928U true CN206293928U (en) | 2017-06-30 |
Family
ID=59104292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621411787.1U Active CN206293928U (en) | 2016-12-22 | 2016-12-22 | Use the single control circuit exported by key control DCDC with switching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206293928U (en) |
-
2016
- 2016-12-22 CN CN201621411787.1U patent/CN206293928U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 4-6, Lanyuan Road, Huayuan Industrial Zone, Binhai New Area, Tianjin 300384 Patentee after: Tianjin Lantian Special Power Technology Co.,Ltd. Address before: No. 6 Lanyuan Road, Huayuan Industrial Park, Binhai New Area, Tianjin 300384 Patentee before: TIANJIN LISHEN SPECIAL POWER TECHNOLOGY CO.,LTD. |