CN206135456U - Two -way USB power supply system - Google Patents
Two -way USB power supply system Download PDFInfo
- Publication number
- CN206135456U CN206135456U CN201621059159.1U CN201621059159U CN206135456U CN 206135456 U CN206135456 U CN 206135456U CN 201621059159 U CN201621059159 U CN 201621059159U CN 206135456 U CN206135456 U CN 206135456U
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- Prior art keywords
- usb connector
- switch circuit
- usb
- microcontroller
- pins
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Abstract
The utility model discloses a two -way USB power supply system, including microcontroller, charging chip, USB connector, a switch circuit, the 2nd switch circuit and be connected to charging chip's battery, charging chip's power input pin and the power output pin was connected to the USB connector respectively through a switch circuit and the 2nd switch circuit VBUS pin, microcontroller detects the type of the equipment of USB connector that is connected to to control a switch circuit and the 2nd switch circuit's break -make: when detecting the power supply unit and be connected to the USB connector, control switch circuit switch -on, the disconnection of the 2nd switch circuit, charging chip gets from the power supply unit to charge for the battery, when detecting external slave unit and be connected to the USB connector, control switch circuit disconnection, the switch -on of the 2nd switch circuit, charging chip gets from the battery to the power supply of external slave unit, thus realized the power supply of two -way USB.
Description
Technical field
This utility model relates to technical field of circuit design, more particularly to a kind of two-way USB electric power systems.
Background technology
At present many electronic equipments are both provided with USB interface, and being connected to PC, power supply etc. by USB interface can be to be somebody's turn to do
Equipment charge.As user steps up to the demand of functions of the equipments, an equipment generally also needs to connect certain by USB interface
A little expansion equipments, carry out extension functionally, now need the equipment to power to external expansion equipment by USB interface, but
Be current electronic equipment can only by USB interface be itself charge, can not be connected to USB interface external equipment supply
Electricity.Such as wireless controller controller in virtual reality system can be connected to main frame and charge for itself by USB interface, but
When handle controller needs to connect some outside expansion equipments, such as gun stock, steering wheel or bow and arrow, when doing extension functionally,
Handle controller powers to the expansion equipment for being connected to USB interface, it is impossible to meet application demand of the user to product.
Utility model content
Can only be itself charging by USB interface to solve current electronic equipment, it is impossible to be connected to USB interface
The external problem powered from equipment, makes an electronic equipment both can be connected to power supply unit by USB interface and charges for itself,
Can be powered from equipment for external by USB interface when connection is from equipment again, this utility model provides a kind of two-way USB and supplies
Electric system.
A kind of two-way USB electric power systems that this utility model is provided include microcontroller, charging chip, battery, USB connections
Device, first switch circuit and second switch circuit；
The charging chip is connected with the battery；
The power input pin of the charging chip is connected to the USB connector by the first switch circuit
VBUS pins；The power supply output pin of the charging chip is connected to the USB connector by the second switch circuit
VBUS pins；
The microcontroller detection is connected to the type of the equipment of the USB connector, and controls the first switch electricity
Road and the break-make of the second switch circuit：
When the microcontroller detect be connected to the USB connector equipment be power supply unit when, the microcontroller
Device controls the first switch circuit ON, the second switch circuit and disconnects, and controls the charging chip and is connected by the USB
The VBUS pins of device are connect from the power supply unit power taking, and is charged for the battery；
When the microcontroller detect be connected to the equipment of the USB connector for it is external from equipment when, the micro-control
Device processed controls the first switch circuit disconnection, the second switch circuit ON, controls the charging chip from the battery
Power taking, and external powered from equipment for described by the VBUS pins of the USB connector.
Wherein, the ID pins of ON pin and the USB connector of the VBUS pins of the USB connector Jing after partial pressure point
It is not connected to the microcontroller；When USB connector does not connect any equipment or when connecting power supply unit, the USB
The ID pins of adapter are high level, when USB connector connection it is external from equipment when, the ID pins of the USB connector are low
Level；
It is when the ON pins that the microcontroller detects the USB connector are changed into high level from low level and described
When the ID pins of USB connector are high level, the microcontroller judges that the equipment for being connected to the USB connector sets as power supply
It is standby；
When the ON pins that the microcontroller detects the USB connector are low level, and the USB connector
ID pins when high level is changed into low level, the microcontroller judge to be connected to the equipment of the USB connector as it is external from
Equipment.
Wherein, the control end of the microcontroller connects the second switch circuit；
When the ON pins that the microcontroller detects the USB connector are low level, and the USB connector
When ID pins are low level, the control signal of the control end of the microcontroller to the second switch circuit output high level；
Otherwise, the control end of the microcontroller is to the low level control signal of the second switch circuit output.
Wherein, the first switch circuit includes the first audion and the first PMOS；
The base stage of first audion connects the ID pins of the USB connector, grounded emitter, and colelctor electrode connects described
The grid of one PMOS；
The source electrode of first PMOS connects the VBUS pins of the USB connector, and drain electrode connects the electricity of the charging chip
Source input pin.
Wherein, the first switch circuit also includes the first electric capacity, the second electric capacity, first resistor, second resistance and first
Schottky diode；
The VBUS pins of the first termination USB connector of first electric capacity, the second end ground connection；
The grid of the first termination first PMOS of the first resistor, the collection of the second termination first audion
Electrode；
The two ends of the second resistance connect respectively the source electrode and grid of first PMOS；The two ends of second electric capacity
The drain and gate of first PMOS is connect respectively；
The positive pole of first Schottky diode connects the drain electrode of first PMOS, and negative pole connects the charging chip
Power input pin.
Wherein, the second switch circuit includes the second audion and the second PMOS；
The base stage of second audion connects the control end of the microcontroller, grounded emitter, and colelctor electrode connects described
The grid of two PMOSs；
The drain electrode of second PMOS connects the VBUS pins of the USB connector, and source electrode connects the electricity of the charging chip
Source output pin.
Wherein, the second switch circuit also includes the 3rd electric capacity, 3rd resistor, the 4th resistance and the pole of the second Schottky two
Pipe；
The grid of the first termination second PMOS of the 3rd resistor, the collection of the second termination second audion
Electrode；
The two ends of the 4th resistance connect respectively the source electrode and grid of second PMOS；The two ends of the 3rd electric capacity
The drain and gate of second PMOS is connect respectively；
The negative pole of second Schottky diode connects the source electrode of second PMOS, and positive pole connects the charging chip
Power supply output pin.
Wherein, the charging chip is BQ24195L chips；
The power input pin of the charging chip is the VBUS pins of the BQ24195L chips, the charging chip
Power supply output pin is the PMID pins of the BQ24195L chips, BQ24195L built-in chip types described in the PMID pins Jing
5V is exported after boost module boosting.
Wherein, the electric power system is applied to the wireless controller controller of virtual reality system.
The beneficial effect of this utility model embodiment is：Jing first switches are distinguished by the VBUS pins by USB connector
Circuit and second switch circuit are connected to the power input pin and power supply output pin of charging chip, are detected using microcontroller
The low and high level of the VBUS pins of USB connector and ID pins changes to judge to be connected to the device type of USB connector, when for
During power supply unit, first switch circuit ON, second switch circuit disconnect, and charging chip, from power supply unit power taking, is that battery fills
Electricity；When for it is external from equipment when, first switch circuit disconnect, second switch circuit ON, control charging chip from battery electricity-taking,
Power from equipment for external, so as to realize that two-way USB powers.
Description of the drawings
The structural representation of a kind of two-way USB electric power systems that Fig. 1 is provided for this utility model embodiment；
The circuit diagram of a kind of two-way USB electric power systems that Fig. 2 (a), Fig. 2 (b) are provided for this utility model embodiment.
Specific embodiment
Design concept of the present utility model is：Can only be itself charging by USB interface for current electronic equipment, no
Can be the external problem powered from equipment for being connected to USB interface, this utility model is drawn using the VBUS pins and ID of USB interface
Foot, what identification was connected to USB interface is power supply unit or external from equipment, when power supply unit is connected, controls charging chip
It is that battery charges from power supply unit power taking；When connect it is external from equipment when, control charging chip from battery electricity-taking, be it is external from
Equipment is powered, so as to realize that two-way USB powers.
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type embodiment is described in further detail.
The structural representation of a kind of two-way USB electric power systems that Fig. 1 is provided for this utility model embodiment.As shown in figure 1,
The two-way USB electric power systems that this utility model embodiment is provided include microcontroller, USB connector, charging chip 110, battery
120th, first switch circuit S1 and second switch circuit S2, charging chip 110 is connected with battery 120.
The power input pin of charging chip 110 is connected to the VBUS pins of USB connector by first switch circuit S1；
The power supply output pin of charging chip 110 is connected to the VBUS pins of USB connector by second switch circuit S2.
Microcontroller is used for the type that detection is connected to the equipment of USB connector, and is opened according to device type control first
The break-make of powered-down road S1 and second switch circuit S2：It is connected to the equipment of USB connector and sets for power supply when microcontroller is detected
When standby, microprocessor controls first switch circuit S1 is connected, second switch circuit S2 disconnects, and charging chip 110 is connected by USB
The VBUS pins of device charge from power supply unit power taking for battery 120；USB connector is connected to when microcontroller is detected
Equipment for it is external from equipment when, microprocessor controls first switch circuit S1 disconnect, second switch circuit S2 connect, charging chip
110 from the power taking of battery 120, and is powered from equipment for external by the VBUS pins of USB connector.
The circuit diagram of a kind of two-way USB electric power systems that Fig. 2 is provided for this utility model embodiment.As shown in Fig. 2 (a),
In one embodiment of the present utility model, the VBUS pins of USB connector are connected to micro- after resistance R14 and R15 partial pressure
Controller, to microcontroller output signal U SB_ON, the ID pins of USB connector are connected to microcontroller, defeated to microcontroller
Go out signal USB_ID.When USB connector does not connect any equipment or when connecting power supply unit, signal USB_ID is high electricity
It is flat；When USB connector connection it is external from equipment when, signal USB_ID be low level.
High level is changed into from low level when microcontroller detects signal USB_ON, and signal USB_ID is high level
When, microcontroller judges to be connected to the equipment of USB connector as power supply unit；It is low when microcontroller detects signal USB_ON
Level, and signal USB_ID is when high level is changed into low level, and microcontroller judges that the equipment for being connected to USB connector is outer
Connect from equipment.
Microcontroller is connected to USB connector according to the change automatic detection of signal USB_ON, USB_ID low and high level
Type, when power supply unit is connected, control charging chip, from power supply unit power taking, is that battery charges；It is external from equipment when connecting
When, control charging chip from battery electricity-taking, be it is external power from equipment, so as to realize that two-way USB powers.
Preferably, the control end connection second switch circuit of microcontroller, output control signal RVS_EN.Work as microcontroller
Signal USB_ON is detected for low level, and signal USB_ID, when being low level, the control end of microcontroller is to second switch
Control signal RVS_EN of circuit output is high level；Otherwise, control of the control end of microcontroller to second switch circuit output
Signal RVS_EN processed is low level.Microcontroller controls the break-make of second switch circuit by output control signal RVS_EN.
As shown in Fig. 2 (b), in preferred embodiment of the present utility model, charging chip is BQ24195L chips, charging core
The power input pin of piece is the VBUS pins of BQ24195L chips, and the power supply output pin of charging chip is BQ24195L chips
PMID pins, PMID pins Jing BQ24195L built-in chip types boost module boosting after export 5V.
First switch circuit includes audion Q10 and PMOS Q5.The base stage 1 of audion Q10 meets the ID of USB connector and draws
Foot USB_ID, grounded emitter GND, colelctor electrode connects the grid 1 of PMOS Q5.The source electrode 2 of PMOS Q5 connects USB connector
VBUS pins, drain electrode 3 connects power input pin VBUS of charging chip.
Preferably, first switch circuit also includes electric capacity C11, electric capacity C13, resistance R16, resistance R18 and the pole of Schottky two
Pipe D17.The VBUS pins of the first termination USB connector of electric capacity C11, the second end ground connection GND.First termination of resistance R18
The grid 1 of PMOS Q5, the colelctor electrode 3 of the second termination audion Q10.The two ends of resistance R16 connect respectively the source electrode 2 of PMOS Q5
With grid 1, the two ends of electric capacity C13 connect respectively drain electrode 3 and the grid 1 of PMOS Q5.The positive pole of Schottky diode D17 meets PMOS
The drain electrode 3 of pipe Q5, negative pole connects power input pin VBUS of charging chip.Schottky diode D17 plays reversely cut-off,
Have the advantages that switching frequency is high and forward voltage drop is low.
When power supply unit is connected to USB connector, microcontroller detects signal USB_ON and is changed into high electricity from low level
Flat, signal USB_ID is always high level, and control signal RVS_EN of microcontroller output is low level, audion Q11 and
PMOS Q6 is ended, and the path of the VBUS pins of the power supply output pin PMID to USB connector of charging chip disconnects；USB_ID
It is high level, audion Q10 conductings, PMOS Q5 conducting, the power input of the VBUS pins to charging chip of USB connector is drawn
The path of foot VBUS is connected, and power supply unit is by the VBUS pins of USB connector through Schottky diode D17 to charging chip
Power input pin VBUS power, the battery such that it is able to give the equipment charges.
Still as shown in Fig. 2 (b), second switch circuit includes audion Q11 and PMOS Q6.The base stage 1 of audion Q11 connects
The control end of microcontroller, receives control signal RVS_EN of microcontroller output, and the ground connection GND of emitter stage 2, colelctor electrode 3 connects
The grid 1 of PMOS Q6, the drain electrode 3 of PMOS Q6 connects the VBUS pins of USB connector, and the power supply that source electrode 2 connects charging chip is defeated
Go out pin PMID.
Preferably, second switch circuit also includes electric capacity C12, resistance R17, resistance R19 and Schottky diode D18.Electricity
The grid 1 of first termination PMOS Q6 of resistance R19, the colelctor electrode 3 of the second termination audion Q11.The two ends of resistance R17 connect respectively
The source electrode 2 and grid 1 of PMOS Q6, the two ends of electric capacity C12 connect respectively drain electrode 3 and the grid 1 of PMOS Q6.Schottky diode
The negative pole of D18 connects the source electrode 2 of PMOS Q6, and positive pole meets the power supply output pin PMID of charging chip.
When it is external be connected to USB connector from equipment when, microcontroller detects signal USB_ID and is changed into low from high level
Level, signal USB_ON is always low level, and control signal RVS_EN of microcontroller output is high level, and audion Q11 leads
Logical, PMOS Q6 conducting, the path of the VBUS pins of the power supply output pin PMID to USB connector of charging chip is connected；
USB_ID is low level, and audion Q10 and PMOS Q5 are ended, and the power supply of the VBUS pins to charging chip of USB connector is defeated
The path for entering pin VBUS disconnects；The power supply output pin PMID output 5V unidirectional currents of charging chip, by USB connector
VBUS pins are powered for external from equipment.
The two-way USB electric power systems that this utility model preferred embodiment is provided can be applicable to the wireless hand of virtual reality system
Handle controller.USB interface is set on handle controller, when handle controller is connected to main frame by USB interface, charging chip
Power for handle controller from main frame power taking, and the internal battery for handle controller charges；When handle controller is connect by USB
Mouthful connection it is external from equipment when, for example connect gun stock, steering wheel or bow and arrow etc., charging chip takes from the internal battery of handle controller
Electricity, is that handle controller is powered, and is powered from equipment for external by USB interface, realizes two-way USB and powers, and enriches void
Intend the application scenarios of real product.
In sum, a kind of two-way USB electric power systems that this utility model is provided, compared with prior art, with following
Beneficial effect：
By the way that by the VBUS pins of USB connector, respectively Jing first switches circuit and second switch circuit are connected to charging core
The power input pin and power supply output pin of piece, using microcontroller the VBUS pins and ID pins of USB connector are detected
Low and high level changes to judge to be connected to the device type of USB connector, when power supply unit is judged as, control first switch electricity
Road is connected, second switch circuit disconnects, and control charging chip, from power supply unit power taking, is that battery charges；When be judged as it is external from
During equipment, control first switch circuit disconnects, second switch circuit ON, control charging chip from battery electricity-taking, be it is external from
Equipment is powered, so as to realize that two-way USB powers.
Preferred embodiment of the present utility model is the foregoing is only, protection model of the present utility model is not intended to limit
Enclose.All any modification, equivalent substitution and improvements made within spirit of the present utility model and principle etc., are all contained in this reality
With in new protection domain.
Claims (9)
1. a kind of two-way USB electric power systems, it is characterised in that the electric power system include microcontroller, charging chip, battery,
USB connector, first switch circuit and second switch circuit；
The charging chip is connected with the battery；
The power input pin of the charging chip is drawn by the VBUS that the first switch circuit is connected to the USB connector
Foot；The power supply output pin of the charging chip is drawn by the VBUS that the second switch circuit is connected to the USB connector
Foot；
Microcontroller detection is connected to the type of the equipment of the USB connector, and control the first switch circuit and
The break-make of the second switch circuit：
When the microcontroller detect be connected to the USB connector equipment be power supply unit when, the microcontroller control
Make the first switch circuit ON, the second switch circuit to disconnect, control the charging chip and pass through the USB connector
VBUS pins from the power supply unit power taking, and for the battery charging；
When the microcontroller detect be connected to the equipment of the USB connector for it is external from equipment when, the microcontroller
The first switch circuit disconnection, the second switch circuit ON are controlled, the charging chip is controlled from the battery electricity-taking,
And external powered from equipment for described by the VBUS pins of the USB connector.
2. two-way USB electric power systems as claimed in claim 1, it is characterised in that the VBUS pins Jing of the USB connector point
The ID pins of ON pins and the USB connector after pressure are connected respectively to the microcontroller；When USB connector does not connect
During any equipment or when connecting power supply unit, the ID pins of the USB connector are high level, when outside USB connector connection
Connect from equipment when, the ID pins of the USB connector are low level；
When the ON pins that the microcontroller detects the USB connector are changed into high level from low level, and the USB connects
When the ID pins for connecing device are high level, the microcontroller judges to be connected to the equipment of the USB connector as power supply unit；
It is low level when the microcontroller detects the ON pins of the USB connector, and the ID of the USB connector draws
When high level is changed into low level, the microcontroller judges the equipment for being connected to the USB connector as external from equipment to foot.
3. two-way USB electric power systems as claimed in claim 2, it is characterised in that the control end connection institute of the microcontroller
State second switch circuit；
It is low level when the microcontroller detects the ON pins of the USB connector, and the ID of the USB connector draws
When foot is low level, the control signal of the control end of the microcontroller to the second switch circuit output high level；Otherwise,
The control end of the microcontroller is to the low level control signal of the second switch circuit output.
4. two-way USB electric power systems as claimed in claim 3, it is characterised in that the first switch circuit includes the one or three
Pole pipe and the first PMOS；
The base stage of first audion connects the ID pins of the USB connector, and grounded emitter, colelctor electrode connects described first
The grid of PMOS；
The source electrode of first PMOS connects the VBUS pins of the USB connector, and the power supply that drain electrode connects the charging chip is defeated
Enter pin.
5. two-way USB electric power systems as claimed in claim 4, it is characterised in that the first switch circuit also includes first
Electric capacity, the second electric capacity, first resistor, second resistance and the first Schottky diode；
The VBUS pins of the first termination USB connector of first electric capacity, the second end ground connection；
The grid of the first termination first PMOS of the first resistor, the current collection of the second termination first audion
Pole；
The two ends of the second resistance connect respectively the source electrode and grid of first PMOS；The two ends difference of second electric capacity
Connect the drain and gate of first PMOS；
The positive pole of first Schottky diode connects the drain electrode of first PMOS, and negative pole connects the power supply of the charging chip
Input pin.
6. two-way USB electric power systems as claimed in claim 3, it is characterised in that the second switch circuit includes the two or three
Pole pipe and the second PMOS；
The base stage of second audion connects the control end of the microcontroller, and grounded emitter, colelctor electrode connects described second
The grid of PMOS；
The drain electrode of second PMOS connects the VBUS pins of the USB connector, and the power supply that source electrode connects the charging chip is defeated
Go out pin.
7. two-way USB electric power systems as claimed in claim 6, it is characterised in that the second switch circuit also includes the 3rd
Electric capacity, 3rd resistor, the 4th resistance and the second Schottky diode；
The grid of the first termination second PMOS of the 3rd resistor, the current collection of the second termination second audion
Pole；
The two ends of the 4th resistance connect respectively the source electrode and grid of second PMOS；The two ends difference of the 3rd electric capacity
Connect the drain and gate of second PMOS；
The negative pole of second Schottky diode connects the source electrode of second PMOS, and positive pole connects the power supply of the charging chip
Output pin.
8. two-way USB electric power systems as described in any one of claim 1-7, it is characterised in that the charging chip is
BQ24195L chips；
The power input pin of the charging chip is the VBUS pins of the BQ24195L chips, the power supply of the charging chip
Output pin is the PMID pins of the BQ24195L chips, the boosting of BQ24195L built-in chip types described in the PMID pins Jing
5V is exported after module boosting.
9. two-way USB electric power systems as claimed in claim 8, it is characterised in that the electric power system is applied to virtual reality
The wireless controller controller of system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621059159.1U CN206135456U (en) | 2016-09-14 | 2016-09-14 | Two -way USB power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621059159.1U CN206135456U (en) | 2016-09-14 | 2016-09-14 | Two -way USB power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206135456U true CN206135456U (en) | 2017-04-26 |
Family
ID=58569260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621059159.1U Active CN206135456U (en) | 2016-09-14 | 2016-09-14 | Two -way USB power supply system |
Country Status (1)
| Country | Link |
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| CN (1) | CN206135456U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942125A (en) * | 2018-01-03 | 2018-04-20 | 硕诺科技（深圳）有限公司 | In-built electrical pool electronic product uses electrical test circuit and its control method |
| CN109217451A (en) * | 2018-11-07 | 2019-01-15 | 越阳科技(厦门)有限公司 | A kind of usb circuit for intelligent water toilet pan |
| CN110323805A (en) * | 2019-07-23 | 2019-10-11 | 深圳市黑电科技有限公司 | A kind of battery management module and circuit |
-
2016
- 2016-09-14 CN CN201621059159.1U patent/CN206135456U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942125A (en) * | 2018-01-03 | 2018-04-20 | 硕诺科技（深圳）有限公司 | In-built electrical pool electronic product uses electrical test circuit and its control method |
| CN107942125B (en) * | 2018-01-03 | 2024-04-16 | 英望科技(山东)有限公司 | Power utilization testing circuit of built-in battery type electronic product and control method thereof |
| CN109217451A (en) * | 2018-11-07 | 2019-01-15 | 越阳科技(厦门)有限公司 | A kind of usb circuit for intelligent water toilet pan |
| CN109217451B (en) * | 2018-11-07 | 2024-04-19 | 越阳科技(厦门)有限公司 | USB interface circuit for intelligent toilet |
| CN110323805A (en) * | 2019-07-23 | 2019-10-11 | 深圳市黑电科技有限公司 | A kind of battery management module and circuit |
| CN110323805B (en) * | 2019-07-23 | 2021-09-17 | 深圳市黑电科技有限公司 | Battery management module and circuit |
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