CN209184290U - A kind of power supply management circuit - Google Patents
A kind of power supply management circuit Download PDFInfo
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- CN209184290U CN209184290U CN201920123598.1U CN201920123598U CN209184290U CN 209184290 U CN209184290 U CN 209184290U CN 201920123598 U CN201920123598 U CN 201920123598U CN 209184290 U CN209184290 U CN 209184290U
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- 239000004065 semiconductor Substances 0.000 claims description 77
- 230000003071 parasitic effect Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000024241 parasitism Effects 0.000 description 1
Abstract
The application provides a kind of power supply management circuit.The power supply management circuit includes: the first control switch, is connected between battery and circuit system, including the first control terminal, and first control terminal is connect with drive module, to be driven the opening and closing that control switch is realized in the first drive level driving of module output；Second control switch, it is connected between battery and circuit system, and it connects with the first control switch, second control switch includes the second control terminal, second control terminal is connect with power input, to be driven the opening and closing for realizing control switch by the second drive level of power input, the power input is for connecting external power supply；And drive module, perhaps voltage value and the first drive level is exported according to temperature value or voltage value for detecting the temperature value of battery.The embodiment of the present application can occur overcharging to avoid battery, over-discharge, situations such as working under improper environment, improve the service life of battery in electronic equipment.
Description
Technical field
This application involves circuit design field, in particular to a kind of power supply management circuit.
Background technique
Current many electronic equipments use battery as energy source, portable to realize.
In existing technique, power input, battery and circuit system generally can be directly connected to together, pass through by producer
Power input, battery are directly powered to circuit system.Because electronic equipment usually needs to use under various circumstances, when electronics is set
It is standby in it is some in special circumstances, as battery capacity store it is full, exhaust or in battery using in unfavorable extreme environment, such as
This may cause battery and occurs overcharging, over-discharge, situations such as working under improper environment, non-by bringing to the service life of battery
Often big influence.
Summary of the invention
The application provides a kind of power supply management circuit, and the service life of battery can be improved.
The embodiment of the present application provides a kind of power supply management circuit, is applied to electronic equipment, the electronic equipment includes battery
And circuit system, the power supply management circuit are electrically connected with the battery and the circuit system, the power supply management electricity
Road includes:
First control switch is connected between the battery and the circuit system, including the first control terminal, and described first
Control terminal is connect with drive module, realizes opening for control switch with the first drive level driving exported by the drive module
It closes；
Second control switch is connected between the battery and the circuit system, and with the first control switch string
Connection, second control switch include the second control terminal, and second control terminal is connect with power input, by the power supply
The opening and closing of control switch is realized in the second drive level driving of input terminal, and the power input is for connecting external power supply；With
And
Drive module, for detecting the temperature value of the battery perhaps voltage value and according to the temperature value or voltage
Value the first drive level of output.
Optionally, first control switch includes the first metal-oxide-semiconductor, source electrode and the battery of first metal-oxide-semiconductor
Anode connection, the drain electrode of first metal-oxide-semiconductor are connect with the anode of the circuit system, the grid of first metal-oxide-semiconductor and institute
State drive module connection.
Optionally, between the grid and the drive module of first metal-oxide-semiconductor, it is additionally provided with the second metal-oxide-semiconductor, described second
The drain electrode of metal-oxide-semiconductor is connect with the grid of first metal-oxide-semiconductor, the source electrode ground connection of second metal-oxide-semiconductor, second metal-oxide-semiconductor
Grid is connect with the drive module.
Optionally, second control switch includes third metal-oxide-semiconductor, the source electrode of the third metal-oxide-semiconductor and system electricity
The anode connection on road, the drain electrode of the third metal-oxide-semiconductor are connect with the anode of the battery, the grid of the third metal-oxide-semiconductor and institute
State power input connection.
Optionally, the third metal-oxide-semiconductor be p-type metal-oxide-semiconductor, the third metal-oxide-semiconductor have parasitic diode, described parasitic two
The anode of pole pipe is connect with the anode of the battery, and the cathode of the parasitic diode is connect with the anode of the circuit system.
Optionally, the positive of the circuit system is equipped with diode between the power input, the diode
Positive to connect with the power input, the cathode of the diode is connect with the anode of the circuit system；
It is parallel relationship between the diode and first control switch, the second control switch.
Optionally, the power supply management circuit further includes charging management chip, and the charging management chip is series at described
Between power input and the anode of the battery.
From the foregoing, it will be observed that the embodiment of the present application is by the first control switch of setting, the second control switch and controls above-mentioned open
The drive module for closing opening and closing, can control power input, battery and circuit system according to different battery working conditions
Between electrical connection, occur overcharging to avoid battery, over-discharge, situations such as working under improper environment, improve electronic equipment
The service life of middle battery.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of power supply management circuit provided by the embodiments of the present application.
Fig. 2 is another structural schematic diagram of power supply management circuit provided by the embodiments of the present application.
Specific embodiment
The preferred embodiment of the application is described in detail with reference to the accompanying drawing so that the advantages of the application and feature more
It is easily readily appreciated by one skilled in the art, to make apparent define to the protection scope of the application.
Referring to Fig. 1, showing the structure of power-supplying circuit provided by the embodiments of the present application in figure.
As shown in Figure 1, the power-supplying circuit is applied to electronic equipment, which includes battery BAT and system
Circuit VBAT, the power supply management circuit are electrically connected with battery BAT and circuit system VBAT.
The power supply management circuit includes the first control switch 1, the second control switch 2 and drive module 3.
First control switch 1, is connected between battery BAT and circuit system VBAT, including the first control terminal, first control
End processed is connect with drive module 3, to be driven the opening and closing that control switch is realized in the first drive level driving of the output of module 3.
Wherein, the first control switch 1 can use switching transistor, switch switching circuit or its that metal-oxide-semiconductor forms
His controlled switch, to realize the opening and closing of control switch by the first control terminal.
Drive module 3 can be using general single-chip microcontroller, be connect by the control pin of single-chip microcontroller with the first control terminal, and
Control is realized by controlling the level change of pin.
In some embodiments, the control signal of first drive level output can by the different level value of setting come
It distinguishes, such as exports the first current potential and the second current potential of potential value different from each other to open the first control switch 1
Close control.
For example, the first current potential is arranged to low potential, the second current potential is arranged to high potential.When drive module 3 is controlled to first
When making the output low potential of switch 1, which is then ended；When drive module 3 is exported to the first control switch 1
When high potential, which is then connected.It should be understood that the specific current potential setting of first drive level can
Depending on according to the actual situation, the application is not construed as limiting this.
It, can be according to drive module 3 to the operating characteristic of battery BAT, such as battery BAT by the way that the first control switch 1 is arranged
Voltage value or temperature value the on-off between battery BAT and circuit system VBAT controlled.For example, working as battery BAT
Voltage lower than work normally when minimum voltage value when, if battery BAT continues to put because of the quiescent current in circuit system VBAT
Electricity, then the case where be easy to causeing over-discharge, after drive module 3 detects above situation at this time, are then driven by exporting corresponding first
Dynamic level, can control first control switch 1 and is in truncation state, so that battery BAT will not be influenced by circuit system VBAT
And over-discharge phenomenon is caused, improve the service life of battery BAT.
Second control switch 2, is connected between battery BAT and circuit system VBAT, and connects with the first control switch 1,
Second control switch 2 includes the second control terminal, which connect with power input DC_IN, by power input
The second drive level driving of DC_IN is held to realize the opening and closing of control switch, power input DC_IN is for connecting external electrical
Source.
Wherein, the second control switch 2 can use switching transistor, switch switching circuit or its that metal-oxide-semiconductor forms
His controlled switch, to realize the opening and closing of control switch by the second control terminal.
Power input DC_IN can be connect with external power supply, so that external power supply can pass through power input DC_IN
It is input to battery BAT and circuit system VBAT, and provides charge function for battery BAT, or in circuit system VBAT
Load supplying.
In some embodiments, the control signal of second drive level output can by the different level value of setting come
It distinguishes, such as exports third current potential and the 4th current potential of potential value different from each other to open the second control switch 2
Close control.
In further embodiments, when power input DC_IN is in uncharged mode, which can be with
The level of third current potential is exported to the second control switch 2, so that the second control switch 2 is in the conductive state, battery BAT is by being somebody's turn to do
Second control switch 2 can be powered for circuit system VBAT.When power input DC_IN is in charge mode, this
Two drive levels can export the level of the 4th current potential to the second control switch 2, so that the second control switch 2 is in cut-off shape
State is entered in battery BAT with the big voltage/current of protection power source input terminal DC_IN input by second control switch 2,
To protect charging normal for battery BAT.
Second control switch 2 makes electronic equipment in charged state and uncharged state two states, in battery
Relatively independent circuit is formed between BAT and circuit system VBAT, between power input DC_IN and battery BAT, is avoided mutually
It influences, to improve the service life of battery BAT.
Drive module 3, for detect the temperature value of battery BAT perhaps voltage value and according to temperature value or voltage value it is defeated
First drive level out.
Wherein, the temperature value or voltage value that detection battery BAT is removed by drive module 3, can pass through the temperature of battery BAT
Angle value or voltage value judge working environment locating for battery BAT.
For example, may determine that battery BAT is in more if drive module 3 detects that the temperature value of battery BAT is excessively high
Dangerous working environment needs to export at this time the first drive level for controlling the cut-off of the first control switch 1 to control to first
System switch 1 is ended, and to disconnect being electrically connected between battery BAT and circuit system VBAT, stops battery BAT work, thus
Realize the protection to battery BAT.
From the foregoing, it will be observed that the embodiment of the present application is by the first control switch of setting, the second control switch and controls above-mentioned open
The drive module for closing opening and closing can cooperate control power input, battery and system according to different battery working conditions
Electrical connection between circuit occurs overcharging, over-discharge, situations such as working under improper environment, improves electronics to avoid battery
The service life of battery in equipment.
Referring to Fig. 2, showing another structure of power supply management circuit provided by the embodiments of the present application in figure.
As shown in Figure 2, wherein the power supply management circuit includes the first control switch, the second control switch and driving mould
Block U1.
In some embodiments, the first control switch may include the first metal-oxide-semiconductor Q1, the source electrode of first metal-oxide-semiconductor Q1 with
The positive BAT+ connection of battery, the drain electrode of first metal-oxide-semiconductor Q1 and the positive VBAT+ connection of circuit system, first metal-oxide-semiconductor Q1
Grid connect with drive module U1.Drive module U1 can be so made to arrive by exporting the first drive level of different potentials
The grid of first metal-oxide-semiconductor Q1 is electrically connected controlling the opening and closing of the first metal-oxide-semiconductor Q1 between battery and circuit system to control
Cut-off and conducting.
In further embodiments, first control switch is between the grid and drive module U1 of the first metal-oxide-semiconductor Q1, also
It can be equipped with the second metal-oxide-semiconductor Q2, the drain electrode of second metal-oxide-semiconductor Q2 is connect with the grid of first metal-oxide-semiconductor Q1, second metal-oxide-semiconductor
The source electrode of Q2 is grounded, and the grid of second metal-oxide-semiconductor Q2 is connect with drive module U1.Second metal-oxide-semiconductor Q2 can drive according to first
The current potential difference of dynamic level is opened and closed, to drive the grid of the first metal-oxide-semiconductor Q1 indirectly, the first metal-oxide-semiconductor Q1 is protected
The state continuously opened is held without excessive heating, ensure that the stability of the circuit course of work.
Specifically, being connected to resistance R1, the 2nd MOS between the drain electrode of first metal-oxide-semiconductor Q1 and the grid of the second metal-oxide-semiconductor Q2
A capacitor C1 is in series between the source electrode and grid of pipe Q2, so that the work between the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 is more
Stablize.Resistance R2 is connected between a pole and power input DC_IN of capacitor C1.The grid and battery of first metal-oxide-semiconductor Q1
Anode between be connected to resistance R3
In some embodiments, which may include third metal-oxide-semiconductor Q3, the source electrode of third metal-oxide-semiconductor Q3
It is connect with the positive VBAT+ of the circuit system, the drain electrode of third metal-oxide-semiconductor Q3 and the positive BAT+ connection of battery, the 3rd MOS
The grid of pipe Q3 is connect with power input DC_IN.Specifically, the grid of third metal-oxide-semiconductor Q3 passes through resistance R4 and power supply
Input terminal DC_IN connection.The third metal-oxide-semiconductor Q3 is p-type metal-oxide-semiconductor, which has parasitic diode, the parasitism two
The anode of pole pipe is connect with the positive BAT+ of battery, and the positive VBAT+ of the cathode of the parasitic diode and the circuit system connects
It connects.
Second control switch is realized opening and closing by the driving of power input DC_IN.For example, if electronic equipment is defeated from power supply
When entering to hold DC_IN to input higher charging voltage, at this time because the voltage for being input to third metal-oxide-semiconductor Q3 grid is greater than blanking voltage,
End third metal-oxide-semiconductor Q3, is ended between battery and circuit system by third metal-oxide-semiconductor Q3 and realize current limliting.But if the
Three metal-oxide-semiconductor Q3 are p-type metal-oxide-semiconductor, as long as the first metal-oxide-semiconductor Q1 is in the conductive state, parasitic diode possessed by the metal-oxide-semiconductor
Meeting is so that there are still the supplies of a small amount of electric current between battery and circuit system, when system disconnects the input of external power supply suddenly
Afterwards, which remains to provide enough operating currents, and circuit system is avoided to cause to close due to withdrawing suddenly because of external power supply.
In some embodiments, diode can be equipped between the positive VBAT+ and power input DC_IN of circuit system
The anode of D1, diode D1 are connect with power input DC_IN, the cathode of diode D1 and the positive VBAT of circuit system
+ connection；It is parallel relationship between diode D1 and the first control switch, the second control switch.
Specifically, power supply management circuit further includes charging management chip U2, it is defeated that charging management chip U2 is series at power supply
Enter to hold between DC_IN and the positive BAT+ of battery, electronic equipment can be the charging of battery by charging management chip U2
Cheng Jinhang Charge Management.
The third metal-oxide-semiconductor of the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2 in the first control switch and the second control switch
On the basis of cooperation between Q3, by between circuit system and power input DC_IN be arranged diode D1, and battery with
Charging management chip U2 is set between power input DC_IN, it can be between battery and circuit system, power input DC_
Relatively independent circuit is formed between IN and battery, avoids influencing each other, to improve the service life of battery.In some cases
Under, diode D1 can also prevent battery current from flowing back into the voltage input end of charging management chip U2 by Q5, avoid the formation of
Power consumption circuit, to reduce the invalid loss of battery.
Drive module U1, for detect the temperature value of battery perhaps voltage value and according to temperature value or voltage value it is defeated
First drive level out.Wherein, the temperature value or voltage value that detection battery is removed by drive module U1, can pass through battery
Temperature value or voltage value judge working environment locating for battery.
In some embodiments, when electronic equipment is in uncharged mode, power input DC_IN does not input charging electricity
Pressure, so that the voltage value of power input DC_IN is less than battery, at the driving of the third metal-oxide-semiconductor Q3 by power input DC_IN
In on state.
At this point, if drive module U1 judges that the battery is in normal operating conditions by detecting the operating characteristic of battery,
The first drive level that current potential is the first current potential is exported, so that the second metal-oxide-semiconductor Q2 is connected, and then drives third metal-oxide-semiconductor Q3 conducting.
It is formed into a loop between battery and circuit system, battery provides electric energy for circuit system.
If drive module U1 judges that the battery is in abnormal operating state, such as electricity by detecting the operating characteristic of battery
The low battery in pond/the expired or temperature of battery is not in normal range of operation, then export first that current potential is the second current potential
Drive level, so that the second metal-oxide-semiconductor Q2 ends, third metal-oxide-semiconductor Q3 is similarly in off state.Between battery and circuit system
Circuit is disconnected, so that battery stops electric discharge or charging.
From the foregoing, it will be observed that the embodiment of the present application is by the first control switch of setting, the second control switch and controls above-mentioned open
The drive module for closing opening and closing, can control power input, battery and circuit system according to different battery working conditions
Between electrical connection, occur overcharging to avoid battery, over-discharge, situations such as working under improper environment, improve electronic equipment
The service life of middle battery.
Presently filed embodiment is explained in detail above in conjunction with attached drawing, but the application is not limited to above-mentioned implementation
Mode within the knowledge of a person skilled in the art can also be under the premise of not departing from the application objective
Various changes can be made.
Claims (7)
1. a kind of power supply management circuit is applied to electronic equipment, the electronic equipment includes battery and circuit system, the confession
Fulgurite reason circuit is electrically connected with the battery and the circuit system, which is characterized in that the power supply management circuit includes:
First control switch is connected between the battery and the circuit system, including the first control terminal, first control
End is connect with drive module, and the opening and closing of control switch is realized with the first drive level driving exported by the drive module；
Second control switch is connected between the battery and the circuit system, and is connected with first control switch, institute
Stating the second control switch includes the second control terminal, and second control terminal is connect with power input, by the power input
The opening and closing of control switch is realized in the second drive level driving at end, and the power input is for connecting external power supply；And
Drive module, for detect the temperature value of the battery perhaps voltage value and according to the temperature value or voltage value it is defeated
First drive level out.
2. power supply management circuit as described in claim 1, which is characterized in that first control switch includes the first metal-oxide-semiconductor,
The source electrode of first metal-oxide-semiconductor is connect with the anode of the battery, and the drain electrode of first metal-oxide-semiconductor and the circuit system are just
Pole connection, the grid of first metal-oxide-semiconductor are connect with the drive module.
3. power supply management circuit as claimed in claim 2, which is characterized in that the grid of first metal-oxide-semiconductor and the driving
Between module, it is additionally provided with the second metal-oxide-semiconductor, the drain electrode of second metal-oxide-semiconductor is connect with the grid of first metal-oxide-semiconductor, and described
The source electrode of two metal-oxide-semiconductors is grounded, and the grid of second metal-oxide-semiconductor is connect with the drive module.
4. power supply management circuit as described in claim 1, which is characterized in that second control switch includes third metal-oxide-semiconductor,
The source electrode of the third metal-oxide-semiconductor is connect with the anode of the circuit system, and the drain electrode of the third metal-oxide-semiconductor and the battery are just
Pole connection, the grid of the third metal-oxide-semiconductor are connect with the power input.
5. power supply management circuit as claimed in claim 4, which is characterized in that the third metal-oxide-semiconductor is p-type metal-oxide-semiconductor, described the
Three metal-oxide-semiconductors have parasitic diode, and the anode of the parasitic diode is connect with the anode of the battery, the parasitic diode
The anode of cathode and the circuit system connect.
6. power supply management circuit as described in claim 1, which is characterized in that the anode of the circuit system is defeated with the power supply
Enter and be equipped with diode between end, the anode of the diode is connect with the power input, the cathode of the diode and institute
State the anode connection of circuit system；
It is parallel relationship between the diode and first control switch, the second control switch.
7. power supply management circuit as described in claim 1, which is characterized in that the power supply management circuit further includes Charge Management
Chip, the charging management chip are series between the power input and the anode of the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920123598.1U CN209184290U (en) | 2019-01-24 | 2019-01-24 | A kind of power supply management circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920123598.1U CN209184290U (en) | 2019-01-24 | 2019-01-24 | A kind of power supply management circuit |
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| Publication Number | Publication Date |
|---|---|
| CN209184290U true CN209184290U (en) | 2019-07-30 |
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ID=67378907
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920123598.1U Expired - Fee Related CN209184290U (en) | 2019-01-24 | 2019-01-24 | A kind of power supply management circuit |
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| CN (1) | CN209184290U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638928A (en) * | 2019-01-24 | 2019-04-16 | 惠州市德赛工业研究院有限公司 | A kind of power supply management circuit, method |
-
2019
- 2019-01-24 CN CN201920123598.1U patent/CN209184290U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638928A (en) * | 2019-01-24 | 2019-04-16 | 惠州市德赛工业研究院有限公司 | A kind of power supply management circuit, method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190730 |
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| CF01 | Termination of patent right due to non-payment of annual fee |