CN106026300A - Control circuit with compatibility of battery charging protection, channel switching and linear power supply management - Google Patents
Control circuit with compatibility of battery charging protection, channel switching and linear power supply management Download PDFInfo
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- CN106026300A CN106026300A CN201610596608.4A CN201610596608A CN106026300A CN 106026300 A CN106026300 A CN 106026300A CN 201610596608 A CN201610596608 A CN 201610596608A CN 106026300 A CN106026300 A CN 106026300A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a control circuit with compatibility of battery charging protection, channel switching and linear power supply management. The control circuit comprises a controller, a lithium battery charging protection unit, a multipath temperature sensor switching unit and a multipath linear power supply management control unit. The lithium battery charging protection unit comprises a first switching tube, a fourth triode, a second resistor, a seventh resistor and a lithium battery charging chip. The base electrode of the fourth triode is connected with the controller through the seventh resistor, and the collection electrode is connected with one end of the second resistor and the first pin of the first switching tube. The other end of the second resistor is connected with a voltage input end and the third pin of the first switching tube. The second pin of the first switching tube is connected with one pin of the lithium battery charging chip. The other pin of the lithium battery charging chip is connected with the positive electrode of a lithium battery. Safe disconnection of the lithium battery after fully charging can be realized so that safety and controllability of lithium battery charging can be enhanced, the occupation number of the I/O ports of the controller can be reduced and controllability and stability of linear power supplies can be enhanced.
Description
Technical field
The present invention relates to control circuit field, particularly to a kind of compatible battery charge protection, lead to
Road switching and the control circuit of linear power supply management.
Background technology
Traditional lithium battery charging circuit is widely used, and has circuit structure simple, peripheral components
The feature such as few, if but in charging process, do not pull out power supply adaptor, also locate even if battery is full of
In trickle charge state not deenergization, thus there is unsafe factor.Additionally tradition electricity
Source control chip cost is higher, circuit flexibility is low, controllability is low and ripple is relatively big, Er Qiechuan
System temperature sensor is directly connected to controller, more or controller in temperature sensor quantity
The situation that I/O mouth is not enough is arisen that in the case of I/O mouth is less.
Summary of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, it is provided that
A kind of can realize the fully charged rear safe shutdown of lithium battery, improve lithium cell charging safety and can
Control property, reduce the taking quantity, improve the controllability of linear power supply and steady of I/O mouth of controller
Compatible battery charge protection, passage switching and the control circuit of linear power supply management qualitatively.
The technical solution adopted for the present invention to solve the technical problems is: a kind of compatible battery of structure
The switching of charge protection, passage and the control circuit of linear power supply management, including controller, lithium electricity
Pond charge protection unit, multi way temperature sensor switch unit and multi-channel linear power management control
Unit, described lithium cell charging protected location and multi way temperature sensor switch unit are all with described
Multi-channel linear power supply management control unit connects, and described lithium cell charging protected location includes first
Switching tube, the 4th audion, the second resistance, the 7th resistance and lithium cell charging chip, described
The base stage of the 4th audion is connected with described controller by described 7th resistance, and the described 4th 3
The grounded emitter of pole pipe, the colelctor electrode of described 4th audion respectively with described second resistance
First pin of one end and the first switching tube connects, the other end of described second resistance respectively with electricity
3rd pin of pressure input and the first switching tube connects, the second pin of described first switching tube
Being connected with a pin of described lithium cell charging chip, another of described lithium cell charging chip draws
Foot connects the positive pole of lithium battery.
In compatible battery charge protection of the present invention, passage switching and linear power supply management
In control circuit, described first switching tube is the first metal-oxide-semiconductor, the of described first switching tube
One pin is the grid of described first metal-oxide-semiconductor, and the second pin of described first switching tube is institute
Stating the drain electrode of the first metal-oxide-semiconductor, the 3rd pin of described first switching tube is a described MOS
The source electrode of pipe.
In compatible battery charge protection of the present invention, passage switching and linear power supply management
In control circuit, described lithium cell charging protected location also include PIN4 interface, fuse,
First resistance, the 3rd resistance, the first electric capacity and the second electric capacity, the first of described PIN4 interface
Pin and the second pin all one end with described fuse are connected, the 3rd of described PIN4 interface
Pin and the 4th pin ground connection, described first electric capacity and the second electric capacity are in parallel, and one end in parallel is made
For described voltage input end, other end ground connection in parallel, the other end of described fuse respectively with
One end of described first resistance and voltage input end connect, and the other end of described first resistance is respectively
It is connected with one end and the controller of described 3rd resistance, the other end ground connection of described 3rd resistance.
In compatible battery charge protection of the present invention, passage switching and linear power supply management
In control circuit, described lithium cell charging protected location also includes the 6th resistance, described lithium battery
5th pin of charging chip passes through described 6th resistance eutral grounding.
In compatible battery charge protection of the present invention, passage switching and linear power supply management
In control circuit, described multi way temperature sensor switch unit include multi channel selecting chip, the 3rd
Ten electric capacity, the 25th resistance and the 26th resistance, the 9th of described multi channel selecting chip draws
Foot and the tenth pin are all connected with described controller, the 3rd pin of described multi channel selecting chip and
13rd pin is all connected with described controller, and the 13rd pin of described multi channel selecting chip is also
Power supply, the 3rd pin of described multi channel selecting chip is connected by described 25th resistance
Described power supply is connected, the of described multi channel selecting chip also by described 26th resistance
Six pins, the 7th pin and the 8th equal ground connection of pin, one end ground connection of described 30th electric capacity,
The other end of described 30th electric capacity respectively with the 16th pin of described multi channel selecting chip and
Power supply connects.
In compatible battery charge protection of the present invention, passage switching and linear power supply management
In control circuit, described multi way temperature sensor switch unit also includes the 37th resistance and
38 resistance, the 11st pin of described multi channel selecting chip passes through described 37th resistance
Ground connection, the 4th pin of described multi channel selecting chip passes through described 38th resistance eutral grounding.
In compatible battery charge protection of the present invention, passage switching and linear power supply management
In control circuit, when the 9th pin and the tenth pin of described multi channel selecting chip are low level
Time, gate the 12nd pin of described multi channel selecting chip to the 13rd pin and described many
First pin of road gating chip is to the 3rd pin；The 9th pin when described multi channel selecting chip
For low level, when the tenth pin is high level, gates the 14th of described multi channel selecting chip and draw
Foot is to the 13rd pin, and the 5th pin of described multi channel selecting chip is to the 3rd pin；When
9th pin of described multi channel selecting chip is high level, when the tenth pin is low level, and gating
15th pin of described multi channel selecting chip is to the 13rd pin, and described multi channel selecting core
Second pin of sheet is to the 3rd pin；When the 9th pin and the tenth of described multi channel selecting chip draws
When foot is high level, the 11st pin gating described multi channel selecting chip draws to the 13rd
Foot, and the 4th pin of described multi channel selecting chip is to the 3rd pin.
In compatible battery charge protection of the present invention, passage switching and linear power supply management
In control circuit, described multi-channel linear power supply management control unit include power control circuit,
One group of power supply, second group of power supply and the 3rd group of power supply, described power control circuit includes the 6th
Metal-oxide-semiconductor, the 7th audion, the 11st resistance, the 13rd resistance and the 14th resistance, institute
State the base stage of the 7th audion to be connected with described controller by described 13rd resistance, described the
The base stage of seven audions is also by described 14th resistance eutral grounding, the transmitting of described 7th audion
Pole ground connection, the colelctor electrode of described 7th audion respectively with one end and of described 11st resistance
The grid of six metal-oxide-semiconductors connects, and the source electrode of described 6th metal-oxide-semiconductor is respectively with the described 11st
The other end of resistance and the positive pole of lithium battery connect, described first group of power supply and described lithium battery
Positive pole connects, the drain electrode of described 6th metal-oxide-semiconductor respectively with described second group of power supply and the 3rd group
Power supply connects, and described first group of power supply is normally opened power supply, it is provided that 3V power supply, described second group
Power supply provides 3V power supply, described 3rd group of power supply to provide 1.8V power supply.
In compatible battery charge protection of the present invention, passage switching and linear power supply management
In control circuit, described first group of power supply include third linear DC voltage-stabilizing chip, the 9th electric capacity,
Tenth electric capacity and the 11st electric capacity, the second pin of described third linear DC voltage-stabilizing chip is respectively
It is connected with described one end of 9th electric capacity and the positive pole of lithium battery, described third linear DC voltage-stabilizing
First pin of chip and the other end ground connection of the 9th electric capacity, described tenth electric capacity and the 11st electricity
Holding parallel connection, one end of its parallel connection connects with the 3rd pin of described third linear DC voltage-stabilizing chip
Connect, other end ground connection in parallel.
In compatible battery charge protection of the present invention, passage switching and linear power supply management
In control circuit, described second group of power supply includes the 5th linear DC voltage stabilizing chip, the 15th electricity
Appearance, the 19th electric capacity and the 20th electric capacity, the second of described 5th linear DC voltage stabilizing chip is drawn
Foot is connected with described one end of 19th electric capacity and the drain electrode of the 6th metal-oxide-semiconductor respectively, and described
First pin of five linear DC voltage stabilizing chips and the other end ground connection of the 19th electric capacity, described
15 electric capacity and the 20th electric capacity are in parallel, one end of its parallel connection and described 5th linear DC voltage stabilizing
3rd pin of chip connects, other end ground connection in parallel；Described 3rd group of power supply includes the 6th
Linear DC voltage stabilizing chip, the 24th electric capacity, the 25th electric capacity and the 27th electric capacity,
Second pin of described 6th linear DC voltage stabilizing chip respectively with described 25th electric capacity
The drain electrode of one end and the 6th metal-oxide-semiconductor connects, the first of described 6th linear DC voltage stabilizing chip
Pin and the other end ground connection of the 25th electric capacity, described 24th electric capacity and the 27th electricity
Holding parallel connection, one end of its parallel connection connects with the 3rd pin of described 6th linear DC voltage stabilizing chip
Connect, other end ground connection in parallel.
Implement the compatible battery charge protection of the present invention, passage switching and the control of linear power supply management
Circuit processed, have the advantages that due to be provided with controller, lithium cell charging protected location,
Multi way temperature sensor switch unit and multi-channel linear power supply management control unit, pass through lithium battery
The charging of lithium battery can be played a protective role by charge protection unit, is sensed by multi way temperature
Device switch unit can effectively reduce the I/O mouth of controller and take quantity, by multi-channel linear electricity
Source control control unit can improve the controllability of linear stabilized power supply；So it can realize lithium electricity
The fully charged rear safe shutdown in pond, the safety improving lithium cell charging and controllability, minimizing control
The taking quantity, improve the controllability of linear power supply and stability of the I/O mouth of device.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below
The accompanying drawing used required in embodiment or description of the prior art will be briefly described, aobvious and
Easily insight, the accompanying drawing in describing below is only some embodiments of the present invention, for this area
From the point of view of those of ordinary skill, on the premise of not paying creative work, it is also possible to according to this
A little accompanying drawings obtain other accompanying drawing.
Fig. 1 is compatible battery charge protection of the present invention, passage switching and the control of linear power supply management
The circuit theory diagrams of lithium cell charging protected location in one embodiment of circuit processed；
Fig. 2 is the circuit theory diagrams of multi way temperature sensor switch unit in described embodiment；
Fig. 3 is the circuit theory diagrams of multi-channel linear power supply management control unit in described embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical side in the embodiment of the present invention
Case is clearly and completely described, it is clear that described embodiment is only the present invention one
Divide embodiment rather than whole embodiments.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained under not making creative work premise,
Broadly fall into the scope of protection of the invention.
Control electricity in compatible battery charge protection of the present invention, passage switching and linear power supply management
In the embodiment of road, the switching of this compatible battery charge protection, passage and the control of linear power supply management
Circuit include controller, lithium cell charging protected location, multi way temperature sensor switch unit and
Multi-channel linear power supply management control unit, lithium cell charging protected location and multi way temperature sensor
Switch unit is all connected with multi-channel linear power supply management control unit.Wherein, lithium cell charging is protected
Protect the circuit theory diagrams of unit as shown in Figure 1.
In Fig. 1, this lithium cell charging protected location includes the first switching tube Q1, the four or three pole
Pipe Q4, the second resistance R2, the 7th resistance R7 and lithium cell charging chip U1, wherein, the
The base stage of four audion Q4 is by the 7th resistance R7 and controller (specifically controller
P0.14 pin) connect, the grounded emitter of the 4th audion Q4, the 4th audion Q4's
Colelctor electrode is connected with one end of the second resistance R2 and first pin of the first switching tube Q1 respectively,
The other end of the second resistance R2 respectively with the of voltage input end VIN and the first switching tube Q1
Three pins connect, second pin of the first switching tube Q1 and the one of lithium cell charging chip U1
Pin (the specifically the 4th pin) connects, another pin (tool of lithium cell charging chip U1
Body is the 3rd pin) connect lithium battery positive pole BT+.
Concrete, the 4th audion Q4, the second resistance R2 and the 7th resistance R7 constitute charging
Protection circuit pre-driver circuitry, the first switching tube Q1 is configured to rear class control circuit.7th
Resistance R7 is current-limiting resistance, and the output of the colelctor electrode of the 4th audion Q4 is used for driving first
Switching tube Q1.When electricity lithium battery being detected is low, controller is by the 4th audion Q4
Base stage be set to high level, now the 4th audion Q4 conducting, the collection of the 4th audion Q4
Electrode output low level drives the first switching tube Q1 conducting, for lithium cell charging；When detecting
The electricity of lithium battery fills with, and the base stage of the 4th audion Q4 is set to low level by controller,
Now the 4th audion Q4 cut-off, the colelctor electrode output high level of the 4th audion Q4, this
Time the first switching tube Q1 cut-off, stop as lithium cell charging, play the effect of protection lithium battery.
The present invention is especially suitable for, in the equipment that 5V/2A adapter is powered, i.e. adding lithium battery
In charging circuit, remarkable result is played in lithium cell charging protection.By multi way temperature sensor
Switch unit can effectively reduce the I/O mouth of controller and take quantity, by multi-channel linear power supply
Management control unit can improve the controllability of linear stabilized power supply；So it can realize lithium battery
Fully charged rear safe shutdown, the safety improving lithium cell charging and controllability, minimizing controller
The taking quantity, improve the controllability of linear power supply and stability of I/O mouth.
In the present embodiment, the first switching tube Q1 is the first metal-oxide-semiconductor, the first switching tube Q1
The grid that the first pin is the first metal-oxide-semiconductor, second pin of the first switching tube Q1 is
The drain electrode of one metal-oxide-semiconductor, the source electrode that the 3rd pin is the first metal-oxide-semiconductor of the first switching tube Q1.
In the present embodiment, this lithium cell charging protected location also includes PIN4 interface J1, fusing
Device F1, the first resistance R1, the 3rd resistance R3, the first electric capacity C1 and the second electric capacity C2,
First pin of PIN4 interface J1 and the second pin all one end with fuse F1 are connected, PIN4
3rd pin of interface J1 and the 4th pin ground connection, the first electric capacity C1 and the second electric capacity C2 are also
Connection, one end in parallel is as voltage input end VIN, other end ground connection in parallel, fuse
The other end of F1 is connected with one end and the voltage input end VIN of the first resistance R1 respectively, the
The other end of one resistance R1 one end and controller with the 3rd resistance R3 respectively (is specifically controlled
The P0.20 pin of device processed) connect, the other end ground connection of the 3rd resistance R3.
In the present embodiment, this lithium cell charging protected location also includes the 6th resistance R6, lithium electricity
5th pin of pond charging chip U1 passes through the 6th resistance R6 ground connection.Thus can ensure that
The charging current of 210mA is provided.
Fig. 2 is the circuit theory diagrams of multi way temperature sensor switch unit in the present embodiment.Fig. 2
In, this multi way temperature sensor switch unit includes multi channel selecting chip U7, the 30th electric capacity
C30, the 25th resistance R25 and the 26th resistance R26, multi channel selecting chip U7,
30th electric capacity C30, the 25th resistance R25 and the 26th resistance R26 constitute bilateral
Road four selects a switch, and the 30th electric capacity C30 is filter capacitor, the 25th resistance R25 and
26th resistance R26 is output pull-up resistor, by multi channel selecting chip during circuit work
9th pin of U7 and the tenth pin gate one of which.
In the present embodiment, the 9th pin of multi channel selecting chip U7 and the tenth pin all with control
Device connects, particularly as being that the 9th pin of multi channel selecting chip U7 draws with the P0.28 of controller
Foot connects, and the tenth pin of multi channel selecting chip U7 is connected with the P0.29 pin of controller.
3rd pin and the 13rd pin of multi channel selecting chip U7 are all connected with controller, particularly as
Being that the 3rd pin of multi channel selecting chip U7 is connected with the P0.26 pin of controller, multichannel is selected
13rd pin of obturator sheet U7 is connected with the P0.27 pin of controller.Multi channel selecting chip
13rd pin of U7 connects power supply VCC3 also by the 25th resistance R25, many
3rd pin of road gating chip U7 connects power supply also by the 26th resistance R26
VCC3, the 6th pin, the 7th pin and the 8th equal ground connection of pin of multi channel selecting chip U7,
One end ground connection of the 30th electric capacity C30, the other end of the 30th electric capacity C30 respectively with multichannel
16th pin and the power supply VCC3 of gating chip U7 connect.
In the present embodiment, when the 9th pin and the tenth pin of multi channel selecting chip U7 are low
During level, the 12nd pin to the 13rd pin of gating multi channel selecting chip U7, Yi Jiduo
First pin of road gating chip U7 is to the 3rd pin；As multi channel selecting chip U7 the 9th
Pin is low level, when the tenth pin is high level, and the tenth of gating multi channel selecting chip U7
Four pins to the 13rd pin, and the 5th pin of multi channel selecting chip U7 is to the 3rd pin；
When the 9th pin of multi channel selecting chip U7 is high level, when the tenth pin is low level, choosing
15th pin of logical multi channel selecting chip U7 is to the 13rd pin, and multi channel selecting chip
Second pin of U7 is to the 3rd pin；The 9th pin and the tenth as multi channel selecting chip U7
When pin is high level, the 11st pin of gating multi channel selecting chip U7 draws to the 13rd
Foot, and the 4th pin of multi channel selecting chip U7 is to the 3rd pin.
In the present embodiment, the 6th pin of multi channel selecting chip U7 is for enabling pin, and ground connection is
Often enabled state；16th pin of multi channel selecting chip U7 is positive supply pin, meets 3V
Power supply；7th pin of multi channel selecting chip U7 is negative supply, and the 8th pin is grounding pin,
It is that single supply power supply station is with all ground connection herein.
In the present embodiment, this multi way temperature sensor switch unit also includes the 37th resistance
R37 and the 38th resistance R38, the 11st pin of multi channel selecting chip U7 passes through the 3rd
17 resistance R37 ground connection, the 4th pin of multi channel selecting chip U7 passes through the 38th resistance
R38 ground connection.This multi way temperature sensor switch unit is as a kind of multi channel selecting of I2C bus
Scheme, input can be respectively connected to 4 identical I2C devices in address, such as: multi channel selecting core
12nd pin of sheet U7 and the first pin, the 14th pin and the 5th pin, the 15th draw
Foot and the second pin, the 11st pin and the 4th pin.It is output as the 13rd pin and the 3rd to draw
Foot.The I/O mouth that this multi way temperature sensor switch unit effectively reduces controller takies quantity.
It is less but need to connect multiple temperature that this multi way temperature sensor switch unit is particularly well-suited to I/O mouth
On the controller of degree sensor, i.e. in the external device circuitry of controller, to lifting controller I/O
The driving force of mouth and the I/O mouth quantity of saving controller play remarkable result.
Fig. 3 is the circuit theory diagrams of multi-channel linear power supply management control unit in the present embodiment.Figure
In 3, the 6th metal-oxide-semiconductor Q6, the 7th audion Q7, the 11st resistance R11, the 13rd
Resistance R13 and the 14th resistance R14 constitutes power control circuit, third linear DC voltage-stabilizing
Chip U3, the 9th electric capacity C9, the tenth electric capacity C10 and the 11st electric capacity C11 constitute first
Group power supply, the 5th linear DC voltage stabilizing chip U5, the 15th electric capacity C15, the 19th electric capacity
C19 and the 20th electric capacity C20 constitutes second group of power supply, and the 3rd group of power supply includes that the 6th is linear straight
Stream voltage stabilizing chip U6, the 24th electric capacity C24, the 25th electric capacity and the 27th electric capacity
C27 constitutes the 3rd group of power supply, and this linear power supply management control unit includes that power supply controls electricity
Road, first group of power supply, second group of power supply and the 3rd group of power supply.
For power control circuit, the 7th audion Q7 and the 11st resistance R11 is constituted
Prime drive circuit, the 13rd resistance R13 is the base stage current-limiting resistance of the 7th audion Q7,
14th resistance R14 is pull down resistor, and the 6th metal-oxide-semiconductor Q6 is post-stage drive circuit.The
The base stage of seven audion Q7 is by the 13rd resistance R13 and controller (specifically controller
P0.07 pin) connect, the base stage of the 7th audion Q7 connects also by the 14th resistance R14
Ground, the grounded emitter of the 7th audion Q7, the colelctor electrode of the 7th audion Q7 respectively with
One end of 11st resistance R11 and the grid of the 6th metal-oxide-semiconductor Q6 connect, the 6th MOS
The source electrode of pipe Q6 connects with the other end of the 11st resistance R11 and the positive pole BT+ of lithium battery respectively
Connecing, first group of power supply is connected with the positive pole BT+ of lithium battery, the drain electrode of the 6th metal-oxide-semiconductor Q6
Being connected with second group of power supply and the 3rd group of power supply respectively, first group of power supply is normally opened power supply, it is provided that
3V power supply, second group of power supply provides 3V power supply, the 3rd group of power supply to provide 1.8V power supply.
In real work, first group of power supply is normally opened power supply, is not controlled by power control circuit,
Second group of power supply and the 3rd group of power supply are controlled by power control circuit simultaneously, when system enters low
During power consumption state, second group of power supply and the 3rd group of power supply all can be closed by power control circuit.By
Fluctuate at work in first group of power supply relatively big, therefore by independent the most effective for second group of power supply
Decrease the power supply impact on whole circuit.
For first group of power supply, second pin of third linear DC voltage-stabilizing chip U3 divides
Not being connected with one end of the 9th electric capacity C9 and the positive pole BT+ of lithium battery, third linear direct current is steady
First pin of pressure chip U3 and the other end ground connection of the 9th electric capacity C9, the tenth electric capacity C10
In parallel with the 11st electric capacity C11, one end of its parallel connection and third linear DC voltage-stabilizing chip U3
The 3rd pin connect, other end ground connection in parallel.
For second group of power supply, second pin of the 5th linear DC voltage stabilizing chip U5 divides
It is not connected with one end of the 19th electric capacity C19 and the drain electrode of the 6th metal-oxide-semiconductor Q6, the 5th line
First pin of property DC voltage-stabilizing chip U5 and the other end ground connection of the 19th electric capacity C19,
15 electric capacity C15 and the 20th electric capacity C20 are in parallel, and one end of its parallel connection is linear with the 5th straight
3rd pin of stream voltage stabilizing chip U5 connects, other end ground connection in parallel.
For the 3rd group of power supply, second pin of the 6th linear DC voltage stabilizing chip U6 divides
It is not connected with one end of the 25th electric capacity C25 and the drain electrode of the 6th metal-oxide-semiconductor Q6, the 6th
First pin of linear DC voltage stabilizing chip U6 and another termination of the 25th electric capacity C25
Ground, the 24th electric capacity C24 and the 27th electric capacity C27 are in parallel, one end of its parallel connection with
3rd pin of the 6th linear DC voltage stabilizing chip U6 connects, other end ground connection in parallel.Should
Multi-channel linear power supply management control unit is particularly well-suited to need to provide different voltage and to voltage
Ripple and stand-by power consumption require in harsh mobile device, and power supply ripple suppression and reduction are set by it
Standby stand-by power consumption plays remarkable result.
In a word, the present invention compared with prior art, can be effectively improved the safety of lithium cell charging
And controllability, it is ensured that lithium battery safely disconnects with power supply adaptor after fully charged；Can effectively carry
The controllability of High Linear regulated power supply, effectively reduces the crosstalk between each power supply；Can effectively subtract
Few temperature sensor takies to controller I/O mouth or is effectively increased I/O mouth and connects temperature sensing
The quantity of device, and the driving force of I/O mouth can be effectively improved.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, all
Within protection scope of the present invention should being included in.
Claims (10)
1. compatible battery charge protection, passage switching and a control circuit for linear power supply management,
It is characterized in that, cut including controller, lithium cell charging protected location, multi way temperature sensor
Changing unit and multi-channel linear power supply management control unit, described lithium cell charging protected location is with many
Temperature sensor switch unit in road is all connected with described multi-channel linear power supply management control unit, institute
State lithium cell charging protected location include the first switching tube, the 4th audion, the second resistance,
Seven resistance and lithium cell charging chip, the base stage of described 4th audion passes through described 7th resistance
It is connected with described controller, the grounded emitter of described 4th audion, described 4th audion
Colelctor electrode be connected with one end of described second resistance and the first pin of the first switching tube respectively,
The other end of described second resistance respectively with voltage input end and the 3rd pin of the first switching tube
Connecting, the second pin of described first switching tube connects with a pin of described lithium cell charging chip
Connecing, another pin of described lithium cell charging chip connects the positive pole of lithium battery.
The switching of compatible battery charge protection the most according to claim 1, passage and linearly electricity
The control circuit of source control, it is characterised in that described first switching tube is the first metal-oxide-semiconductor,
First pin of described first switching tube is the grid of described first metal-oxide-semiconductor, and described first opens
Close the drain electrode that the second pin is described first metal-oxide-semiconductor of pipe, the 3rd of described first switching tube
Pin is the source electrode of described first metal-oxide-semiconductor.
The switching of compatible battery charge protection the most according to claim 2, passage and linearly electricity
The control circuit of source control, it is characterised in that described lithium cell charging protected location also includes
PIN4 interface, fuse, the first resistance, the 3rd resistance, the first electric capacity and the second electric capacity,
First pin of described PIN4 interface and the second pin all one end with described fuse are connected,
3rd pin of described PIN4 interface and the 4th pin ground connection, described first electric capacity and the second electricity
Hold parallel connection, one end in parallel as described voltage input end, other end ground connection in parallel, described
The other end of fuse is connected with one end and the voltage input end of described first resistance respectively, described
The other end of the first resistance is connected with one end and the controller of described 3rd resistance respectively, and described
The other end ground connection of three resistance.
The switching of compatible battery charge protection the most according to claim 3, passage and linearly electricity
The control circuit of source control, it is characterised in that described lithium cell charging protected location also includes
Six resistance, the 5th pin of described lithium cell charging chip passes through described 6th resistance eutral grounding.
5. according to the compatible battery charge protection described in Claims 1-4 any one, passage
Switching and the control circuit of linear power supply management, it is characterised in that described multi way temperature sensor
Switch unit includes multi channel selecting chip, the 30th electric capacity, the 25th resistance and the 26th
Resistance, the 9th pin of described multi channel selecting chip and the tenth pin are all with described controller even
Connecing, the 3rd pin of described multi channel selecting chip and the 13rd pin are all with described controller even
Connecing, the 13rd pin of described multi channel selecting chip connects confession also by described 25th resistance
Electricity power supply, the 3rd pin of described multi channel selecting chip connects also by described 26th resistance
Described power supply, the 6th pin, the 7th pin and the 8th pin of described multi channel selecting chip
All ground connection, one end ground connection of described 30th electric capacity, the other end of described 30th electric capacity is respectively
It is connected with the 16th pin and the power supply of described multi channel selecting chip.
The switching of compatible battery charge protection the most according to claim 5, passage and linearly electricity
The control circuit of source control, it is characterised in that described multi way temperature sensor switch unit also wraps
Including the 37th resistance and the 38th resistance, the 11st pin of described multi channel selecting chip leads to
Crossing described 37th resistance eutral grounding, the 4th pin of described multi channel selecting chip is by described the
38 resistance eutral groundings.
The switching of compatible battery charge protection the most according to claim 6, passage and linearly electricity
The control circuit of source control, it is characterised in that when described multi channel selecting chip the 9th pin and
When tenth pin is low level, gate the 12nd pin of described multi channel selecting chip to the tenth
Three pins, and the first pin of described multi channel selecting chip is to the 3rd pin；When described multichannel
9th pin of gating chip is low level, when the tenth pin is high level, gates described multichannel
14th pin to the 13rd pin of gating chip, and the 5th of described multi channel selecting chip the
Pin is to the 3rd pin；When the 9th pin of described multi channel selecting chip is high level, and the tenth draws
When foot is low level, gate the 15th pin of described multi channel selecting chip to the 13rd pin,
And the second pin of described multi channel selecting chip is to the 3rd pin；When described multi channel selecting chip
The 9th pin and the tenth pin when being high level, gate the tenth of described multi channel selecting chip the
One pin to the 13rd pin, and the 4th pin of described multi channel selecting chip draws to the 3rd
Foot.
8. according to the compatible battery charge protection described in Claims 1-4 any one, passage
Switching and the control circuit of linear power supply management, it is characterised in that described multi-channel linear power supply pipe
Reason control unit includes power control circuit, first group of power supply, second group of power supply and the 3rd group of electricity
Source, described power control circuit include the 6th metal-oxide-semiconductor, the 7th audion, the 11st resistance,
13rd resistance and the 14th resistance, the base stage of described 7th audion is by described 13rd electricity
Resistance is connected with described controller, and the base stage of described 7th audion is also by described 14th resistance
Ground connection, the grounded emitter of described 7th audion, the colelctor electrode of described 7th audion is respectively
It is connected with described one end of 11st resistance and the grid of the 6th metal-oxide-semiconductor, described 6th MOS
The source electrode of pipe is connected with the described other end of the 11st resistance and the positive pole of lithium battery respectively, described
First group of power supply is connected with the positive pole of described lithium battery, and the drain electrode of described 6th metal-oxide-semiconductor is respectively
Being connected with described second group of power supply and the 3rd group of power supply, described first group of power supply is normally opened power supply,
3V power supply, described second group of power supply is provided to provide 3V power supply, described 3rd group of power supply to provide
1.8V power supply.
The switching of compatible battery charge protection the most according to claim 8, passage and linearly electricity
The control circuit of source control, it is characterised in that described first group of power supply includes third linear direct current
Voltage stabilizing chip, the 9th electric capacity, the tenth electric capacity and the 11st electric capacity, described third linear direct current is steady
Second pin of pressure chip is connected with described one end of 9th electric capacity and the positive pole of lithium battery respectively,
First pin of described third linear DC voltage-stabilizing chip and the other end ground connection of the 9th electric capacity, institute
Stating the tenth electric capacity and the 11st electric capacity is in parallel, one end of its parallel connection is steady with described third linear direct current
3rd pin of pressure chip connects, other end ground connection in parallel.
Compatible battery charge protection the most according to claim 8, passage switch and linear
The control circuit of power management, it is characterised in that described second group of power supply includes that the 5th is linear straight
Stream voltage stabilizing chip, the 15th electric capacity, the 19th electric capacity and the 20th electric capacity, described 5th linear
Second pin of DC voltage-stabilizing chip respectively with one end and the 6th MOS of described 19th electric capacity
The drain electrode of pipe connects, the first pin of described 5th linear DC voltage stabilizing chip and the 19th electric capacity
Other end ground connection, described 15th electric capacity and the 20th electric capacity are in parallel, one end of its parallel connection with
3rd pin of described 5th linear DC voltage stabilizing chip connects, other end ground connection in parallel；Institute
State the 3rd group of power supply include the 6th linear DC voltage stabilizing chip, the 24th electric capacity, the 25th
Electric capacity and the 27th electric capacity, the second pin of described 6th linear DC voltage stabilizing chip respectively with
The drain electrode of one end of described 25th electric capacity and the 6th metal-oxide-semiconductor connects, described 6th linear
First pin of DC voltage-stabilizing chip and the other end ground connection of the 25th electric capacity, the described 20th
Four electric capacity and the 27th electric capacity are in parallel, one end of its parallel connection and described 6th linear DC voltage stabilizing
3rd pin of chip connects, other end ground connection in parallel.
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| CN201610596608.4A CN106026300B (en) | 2016-07-26 | 2016-07-26 | Compatible battery charge protection, channel switch and the control circuit of linear power supply management |
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| CN201610596608.4A CN106026300B (en) | 2016-07-26 | 2016-07-26 | Compatible battery charge protection, channel switch and the control circuit of linear power supply management |
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| CN108933585A (en) * | 2018-07-05 | 2018-12-04 | 科沃斯机器人股份有限公司 | A kind of active circuit and dust catcher |
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| CN106026300B (en) | 2018-11-02 |
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