CN206272332U - A kind of power control circuit - Google Patents
A kind of power control circuit Download PDFInfo
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- CN206272332U CN206272332U CN201621199129.0U CN201621199129U CN206272332U CN 206272332 U CN206272332 U CN 206272332U CN 201621199129 U CN201621199129 U CN 201621199129U CN 206272332 U CN206272332 U CN 206272332U
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- power supply
- chip
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- control chip
- circuit
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Abstract
The utility model is related to a kind of power control circuit, and power control circuit includes battery supply, external power supply circuit, controlled switch, key switch and power supply control chip；The energization input of the output end of external power supply circuit Enable Pin, the control end of controlled switch and power supply control chip respectively with power supply control chip is connected；The first end of controlled switch is connected with battery supply, and the second end is connected with the energization input of power supply control chip, and the first end of controlled switch and the second end connect or disconnect under the control of control end；Second end of controlled switch is connected by key switch with the Enable Pin of power supply control chip；The power supply output end of power supply control chip is connected with master chip powers with to master chip, and the control output end of master chip is connected with the Enable Pin of power supply control chip.Power control circuit of the present utility model provides hardware foundation for the normal power supply under battery and external power supply both of which.
Description
Technical field
The utility model is related to power technology, more particularly, to a kind of power control circuit.
Background technology
In the prior art, many electronic products can be used from charged pool or external power supply (such as general USB electricity
Source) power for product, in order to the power supply of master chip can be ensured under battery and external power supply both of which, it is ensured that master chip
Be not in power down phenomenon, it is necessary to design a kind of power control circuit, to ensure that the normal power supply under both patterns is provided
Hardware foundation.
Utility model content
A purpose of the present utility model is to propose a kind of new power control circuit, is two kinds of moulds of battery and external power supply
Normal power supply under formula provides hardware foundation.
According to one side of the present utility model, there is provided a kind of power control circuit, including battery supply, external power supply electricity
Road, controlled switch, key switch and power supply control chip；
The output end of external power supply circuit Enable Pin respectively with the power supply control chip, the controlled switch
The energization input connection of control end and the power supply control chip；
The first end of the controlled switch is connected with the battery supply, the power supply of the second end and the power supply control chip
Input is connected, and the first end of the controlled switch and the second end connect or disconnect under the control of the control end；Also, institute
The second end for stating controlled switch is connected by the key switch with the Enable Pin of the power supply control chip；And,
The power supply output end of the power supply control chip is connected with master chip powers with to the master chip, the master chip
Control output end be connected with the Enable Pin of the power supply control chip.
Alternatively, the external power supply circuit is USB power source circuit.
Alternatively, the controlled switch is p-type FET, drain electrode and the battery supply of the p-type FET
Connection, source electrode is connected with the energization input of the power supply control chip, and grid is by resistance eutral grounding, the external power supply circuit
Output end be connected between the grid of the p-type FET and the resistance.
Alternatively, it is provided with anti-down between the output end of the external power supply circuit and the Enable Pin of the power supply control chip
Fill circuit.
Alternatively, it is provided between the output end of the external power supply circuit and the energization input of the power supply control chip
Anti-back flow circuit.
Alternatively, it is provided with anti-between the control output end of the master chip and the Enable Pin of the power supply control chip
Back flow circuit.
Alternatively, one end being connected with the Enable Pin of the power supply control chip of the key switch is protected by ESD
Diode is grounded.
Alternatively, it is provided with anti-back flow circuit between the Enable Pin of the key switch and the power supply control chip.
Alternatively, the second end of the controlled switch is grounded by ESD protection diodes.
Alternatively, the output end of the external power supply circuit is grounded by ESD protection diodes.
Power control circuit of the present utility model, for the normal power supply under battery and external power supply both of which is provided firmly
Part basis, controls the working condition of power supply control chip, it is ensured that master chip is at two kinds using the Enable Pin of power supply control chip
Can normal work under powering mode.
By referring to the drawings to the detailed description of exemplary embodiment of the present utility model, it is of the present utility model other
Feature and its advantage will be made apparent from.
Brief description of the drawings
The Description of Drawings embodiment of the present utility model of a part for specification is constituted, and is used together with the description
In explanation principle of the present utility model.
Fig. 1 is the block diagram of the power control circuit that the utility model embodiment is provided.
Fig. 2 is the correlation circuit diagram of the controlled switch that the utility model embodiment is provided.
Fig. 3 is the correlation circuit diagram of the key switch that the utility model embodiment is provided
Specific embodiment
Describe various exemplary embodiments of the present utility model in detail now with reference to accompanying drawing.It should be noted that：Unless another
Illustrate outward, the part and the positioned opposite of step, numerical expression and numerical value for otherwise illustrating in these embodiments are not limited
Make scope of the present utility model.
The description only actually at least one exemplary embodiment is illustrative below, never as to this practicality
New and its application or any limitation for using.
May be not discussed in detail for technology and equipment known to person of ordinary skill in the relevant, but in appropriate situation
Under, the technology and equipment should be considered as a part for specification.
In all examples shown here and discussion, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it need not be further discussed in subsequent accompanying drawing.
With reference to shown in Fig. 1-3, power control circuit provided in an embodiment of the present invention is illustrated：
Power control circuit includes battery supply 1, external power supply circuit 2, controlled switch 3, key switch 4 and power supply
Control chip 5.
Master chip 6 is the supply object of power supply control chip 5, and an effect of power supply control chip 5 is by input electricity
Source be converted to master chip 6 needed for power supply.In one embodiment, power supply control chip 5 can for example select TPS62740 electricity
Source control chip.
Signified external power supply circuit 2 can be for example USB power source circuit in the utility model, and USB power source circuit is for example
Over-current over-voltage protection chip can be included；USB power source is exported after over-current over-voltage protection chip, is that master chip 6 is powered.
The energization input Vin of power supply control chip 5 is used to access power supply, and power supply output end vo ut is used for and master chip 6
Power end VCC connection powered with to master chip 6, wherein, power supply control chip 5 also have Enable Pin Enable, only make
When energy end Enable is high level, the power supply output end vo ut of power supply control chip 5 could be exported.Additionally, the control of master chip 6
Output end CTL is connected with the Enable Pin Enable of power supply control chip 5.
Controlled switch 3 has first end 31, the second end 32 and control end 33；The first end 31 and second of controlled switch 3
End 32 connects under the control of control end 33 and is turned on or off, wherein, when control end 33 is high level, first end 31 and second
It is disconnection between end 32.
Key switch 4 is a kind of electronic switch, and its internal structure is, for example, to realize break-make with the change of metal clips stress
, when user applies pressure on key switch 4, the closure of key switch 4 is connected, when user cancels pressure, key switch 4
Then turn off.
The output end VCHG of external power supply circuit 2 Enable Pin Enable, controlled switch 3 respectively with power supply control chip 5
Control end 33 and power supply control chip 5 energization input Vin connection.
The first end 31 of controlled switch 3 is connected with the battery feeder ear VBAT of battery supply 1, the second end 32 and power supply
The energization input Vin connections of chip 5, control end 33 is connected with the output end VCHG of external power supply circuit 2, that is to say, that receive
The end 32 of first end 31 and second of control switch 3 connects under the control of the output end VCHG of external power circuit 2 and is turned on or off.
Additionally, the second end 32 of controlled switch 3 is also connected by key switch 4 with the Enable Pin Enable of power supply control chip 5.
Power control circuit of the present utility model has two kinds of mode of operations：
The first mode of operation is powered to master chip 6 by external power supply circuit 2, and its operation principle is：When external electricity
When source circuit 2 has input, such as during the plug insertion socket of external power supply circuit 2, the output end VCHG of external power supply circuit 2 draws
The Enable Pin Enable of power supply control chip high 5 and the control end 33 of controlled switch 3, the now He of first end 31 of controlled switch 33
To disconnect between second end 32, the energization input Vin of power supply control chip 5 accesses the output end VCHG of external power supply circuit 2
The power supply of offer, and powered to master chip 6 by the output end vo ut that powers.
Second mode of operation is powered to master chip 6 by battery supply 1, and its operation principle is：When external power supply electricity
When road 2 is not input into, such as when the plug of external power supply circuit 2 is extracted, the output end VCHG no-voltages of external power supply circuit 2,
Now for connection is turned between the end 32 of first end 31 and second of controlled switch 33, battery supply 1 accesses power supply through controlled switch 3
The energization input Vin of control chip 5.If user's press of key switch 4 so that key switch 4 is conducting state, battery electricity
The Enable Pin Enable of power supply control chip 5 is drawn high through controlled switch 3, key switch 4 in source 1, and power supply control chip 5 is by supplying
Electricity output end Vout powers to master chip 6 so that the normal work of master chip 6, now the control output end CTL outputs of master chip 6
The Enable Pin Enable of signal adapter power supply control chip 5 is enabled, Enable Pin Enable is maintained into high level state, Yong Husong
Master chip 6 also will not power down after opening key switch 4.
Wherein, between the Enable Pin Enable of the output end VCHG of external power supply circuit 2 and the chip of power supply 5, main core
Between the control output end CTL of piece 6 and the Enable Pin Enable of power supply control chip 5 and key switch 4 and power supply core
Between the Enable Pin Enable of piece 5, anti-back flow circuit can be respectively equipped with, for example, reverse-filling diode is set, to ensure two kinds
It is relatively independent between power supply, occur without and pour in down a chimney phenomenon.
Shown in Figure 2, controlled switch 3 for example selects p-type FET Q1, and the drain D of p-type FET Q1 is first
End, is connected with the battery feeder ear VBAT of battery supply 1；Source S is the second end, the energization input with power supply control chip 5
Vin is connected；Grid G is control end, is grounded by resistance R1, and the output end VCHG of external power supply circuit 2 is connected to p-type field-effect
Between the grid G and resistance R1 of pipe Q1.When external power supply circuit 2 has input, in the presence of its output end VCHG, p-type
It is disconnection between the source S and drain D of effect pipe Q1；Conversely, when extraneous power circuit 2 is not input into, p-type FET Q1
Source S and drain D between for conducting.
Wherein, it is provided between the output end VCHG of external power supply circuit 2 and the energization input Vin of power supply control chip 5
Reverse-filling diode D6, the second end 32 of controlled switch 3 and the output end VCHG of external power supply circuit 2 protect two poles by ESD
Pipe D3 is grounded, and electric capacity C63, C64, C72 mainly strobe.
Shown in Figure 3, one end that key switch 4 is connected with the Enable Pin Enable of power supply control chip 5 can pass through
ESD protection diodes D2 is grounded, to prevent overcurrent-overvoltage situation.
Power control circuit of the present utility model, for the normal power supply under battery and external power supply both of which is provided firmly
Part basis, controls the working condition of power supply control chip, it is ensured that master chip is at two kinds using the Enable Pin of power supply control chip
Can normal work under powering mode.Alternatively, power control circuit design of the present utility model is simple, convenient to carry out.
Although being described in detail to some specific embodiments of the present utility model by example, this area
It is to be understood by the skilled artisans that above example is merely to illustrate, rather than in order to limit scope of the present utility model.This
Field it is to be understood by the skilled artisans that can be in the case where scope and spirit of the present utility model not be departed from, to above example
Modify.Scope of the present utility model is defined by the following claims.
Claims (10)
1. a kind of power control circuit, it is characterised in that opened including battery supply, external power supply circuit, controlled switch, button
Close and power supply control chip；
Enable Pin, the control of the controlled switch respectively with the power supply control chip of the output end of the external power supply circuit
The energization input connection of end and the power supply control chip；
The first end of the controlled switch is connected with the battery supply, the supply input of the second end and the power supply control chip
End connection, the first end of the controlled switch and the second end connect or disconnect under the control of the control end；Also, it is described to receive
The second end for controlling switch is connected by the key switch with the Enable Pin of the power supply control chip；And,
The power supply output end of the power supply control chip is connected with master chip powers with to the master chip, the control of the master chip
Output end processed is connected with the Enable Pin of the power supply control chip.
2. power control circuit according to claim 1, it is characterised in that the external power supply circuit is USB power source electricity
Road.
3. power control circuit according to claim 1, it is characterised in that the controlled switch is p-type FET, institute
The drain electrode for stating p-type FET is connected with the battery supply, and source electrode is connected with the energization input of the power supply control chip,
Grid is connected to the grid and the electricity of the p-type FET by resistance eutral grounding, the output end of the external power supply circuit
Between resistance.
4. power control circuit according to claim 1, it is characterised in that the output end of the external power supply circuit and institute
Anti-back flow circuit is provided between the Enable Pin for stating power supply control chip.
5. power control circuit according to claim 1, it is characterised in that the output end of the external power supply circuit and institute
Anti-back flow circuit is provided between the energization input for stating power supply control chip.
6. power control circuit according to claim 1, it is characterised in that the control output end of the master chip with
Anti-back flow circuit is provided between the Enable Pin of the power supply control chip.
7. power control circuit according to claim 1, it is characterised in that the key switch with the power supply
One end of the Enable Pin connection of chip is grounded by ESD protection diodes.
8. power control circuit according to claim 1, it is characterised in that the key switch and the power supply core
Anti-back flow circuit is provided between the Enable Pin of piece.
9. power control circuit according to claim 1, it is characterised in that the second end of the controlled switch passes through ESD
Protection diode is grounded.
10. power control circuit according to claim 1, it is characterised in that the output end of the external power supply circuit is led to
Cross ESD protection diodes ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199129.0U CN206272332U (en) | 2016-11-07 | 2016-11-07 | A kind of power control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199129.0U CN206272332U (en) | 2016-11-07 | 2016-11-07 | A kind of power control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206272332U true CN206272332U (en) | 2017-06-20 |
Family
ID=59038937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621199129.0U Active CN206272332U (en) | 2016-11-07 | 2016-11-07 | A kind of power control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206272332U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108717146A (en) * | 2018-05-31 | 2018-10-30 | 航天东方红卫星有限公司 | A kind of portable moonlet power supply and distribution test equipment |
| CN109041360A (en) * | 2018-06-07 | 2018-12-18 | 佛山市毅丰电器实业有限公司 | A kind of upgrading control device of stage lamp |
| CN112968497A (en) * | 2021-03-10 | 2021-06-15 | 深圳宝新创科技股份有限公司 | Battery power supply control circuit and electronic equipment |
-
2016
- 2016-11-07 CN CN201621199129.0U patent/CN206272332U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108717146A (en) * | 2018-05-31 | 2018-10-30 | 航天东方红卫星有限公司 | A kind of portable moonlet power supply and distribution test equipment |
| CN109041360A (en) * | 2018-06-07 | 2018-12-18 | 佛山市毅丰电器实业有限公司 | A kind of upgrading control device of stage lamp |
| CN112968497A (en) * | 2021-03-10 | 2021-06-15 | 深圳宝新创科技股份有限公司 | Battery power supply control circuit and electronic equipment |
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| GR01 | Patent grant |