CN208423760U - The vehicle-mounted anti-short circuit current of USB - Google Patents
The vehicle-mounted anti-short circuit current of USB Download PDFInfo
- Publication number
- CN208423760U CN208423760U CN201821095859.5U CN201821095859U CN208423760U CN 208423760 U CN208423760 U CN 208423760U CN 201821095859 U CN201821095859 U CN 201821095859U CN 208423760 U CN208423760 U CN 208423760U
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- usb
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Abstract
A kind of anti-short circuit current of vehicle-mounted USB increases zener diode ZD002, MOSFET pipe Q012, triode Q013, self-recovery fuse F001 in original vehicle-mounted Radio internal circuit；When voltage at USB-5V power supply interface is more than 5.6V, such as the USB_5V power supply line at the peripheral hardware end of vehicle-mounted USB data line is when accidentally touching vehicle-mounted 14V power supply, zener diode ZD002 will reverse breakdown, make triode Q013 be connected, and then make MOSFET pipe Q012 end；When data line peripheral hardware end shield line causes short circuit; self-recovery fuse can rapid open-circuit line; self-recovery fuse can independently restore low-resistance on state after cooling; it is excessive and high current is poured into and damaged to vehicle-mounted Radio to be effectively prevented vehicle power supply output electric current, to achieve the purpose that protect vehicle power supply and vehicle-mounted Radio.
Description
Technical field
The utility model relates to electronic circuit technology fields, and in particular to a kind of vehicle-mounted anti-short circuit current of USB.
Background technique
As the high frequency of vehicle and mobile phone uses, vehicle-mounted USB has become essential a part on vehicle, in people
During routine use automobile, use the USB interface of vehicle-mounted Radio to the electronic equipments such as mobile phone charging, use cigar lighter as
The case where automobile data recorder and air purifier etc. are powered is more and more frequent, but if there is vehicle-mounted USB electricity consumption peripheral hardware failure,
It can then cause vehicle-mounted USB electric current excessive, to damage vehicle-mounted USB internal circuit.
To avoid above situation, generally using USB Interface Special protection control chip or discrete component, to vehicle-mounted
The power supply of USB exports and signal wire carries out the protection and monitoring management of overcurrent, over-voltage, mainly by vehicle-mounted USB interface
The electric current and voltage of power supply and data line are monitored, cut off in time when detecting risk status vehicle-mounted USB power supply and
Data line route.
But now people to electricity consumption peripheral hardware it is fully charged after, the data line for being inserted into the USB socket of vehicle-mounted Radio is often forgotten about
It extracts, has resulted in data line peripheral hardware end and be in vacant state, once the USB power source line of vehicle-mounted Radio or data line peripheral hardware end
Cigarette lighter socket is accidentally fallen into, cigarette lighter socket power interface is touched, or touches other vehicle-mounted 14V power interfaces, just
It will lead to the USB power source line or data line peripheral hardware end shield line and vehicle-mounted cigarette lighter or other vehicle power supply interfaces of vehicle-mounted Radio
Short circuit is also easy to lead to the USB power source line of vehicle-mounted Radio or data line peripheral hardware end USB_ to damage vehicle power supply and Radio
5V power interface and vehicle-mounted cigarette lighter or other vehicle power supply interface short circuits, to cause cigar lighter or other vehicle-mounted 14V power supplys
Flow backward USB-5V power supply and cause short-circuit situation, damages vehicle power supply and Radio.
Summary of the invention
In view of the above-mentioned problems of the prior art, the utility model provides a kind of anti-short circuit current of vehicle-mounted USB, reduce more
The short-circuit risks of vehicle-mounted USB in the case of kind, while vehicle power supply is protected, guarantee the normal operation of vehicle-mounted USB circuit, extends it
Service life.
A kind of vehicle-mounted anti-short circuit current of USB of the utility model, including USB socket USB_CON, ESD protection pipe D301, capacitor
C004, C080,2 feet, 3 feet of the USB socket USB_CON connect the 6th foot, the 4th foot of ESD protection pipe D301, ESD protection respectively
1 foot of pipe D301 connects USB_OTG D- signal end, and 2 feet connect USB_OTG D+ signal end, the 5 feet ground connection of ESD protection pipe D301；Also
Including capacitor C011, C0027, C028, C033, C138, zener diode ZD001, ZD002, ZD101, MOSFET pipe Q012, three
Pole pipe Q013；
1 foot of the USB socket USB_CON meets the drain electrode of MOSFET pipe Q012, MOSFET pipe Q012 by resistance R009
Source electrode connect 5V power output end, grid passes sequentially through resistance R088, R089 and meets 14V power output end, USB socket USB_CON
4 feet ground connection；
The zener diode ZD001 plus earth, cathode connect between resistance R088 and resistance R089, zener diode
ZD002 anode passes sequentially through resistance R091, R092 ground connection, and cathode connects 1 foot of USB socket USB_CON；Zener diode ZD101
Anode connects the source electrode of MOSFET pipe Q012,2 feet of ESD protection pipe D301 respectively, cathode connect resistance R088 and resistance R089 it
Between；
The capacitor C011 is in parallel with diode ZD001, and capacitor C027 connects between triode Q013 base stage and ground, capacitor
C028 connects between zener diode ZD101 anode and ground, and capacitor C033 is in parallel with capacitor C028；
The triode Q013 base stage is connect between resistance R091, R092 by resistance R090, and collector passes through resistance
R093 connects diode ZD001 cathode, emitter ground connection.
It further, further include self-recovery fuse F001 and capacitor C138, the self-recovery fuse F001 and capacitor
C138 parallel connection is followed by between 5 feet and ground of USB socket USB_CON, and 5 feet of USB socket USB_CON meet USB socket USB_CON
6 feet.
Compared with prior art, the utility model can pass through shutdown control switch MOSFET pipe after detecting electric voltage exception
Achieve the purpose that protect electricity consumption peripheral hardware and vehicle-mounted Radio, effectively prevents the USB_5V at the peripheral hardware end of vehicle-mounted USB data line
When accidentally touching vehicle-mounted 14V power supply, 14V power supply is poured into power supply line by USB_5V power supply line, to vehicle-mounted USB interface and
Radio is damaged；It is excessive that vehicle-mounted 14V power supply output is also prevented simultaneously, protects vehicle-mounted 14V power supply.
In addition, the utility model increases self-recovery fuse at USB socket shielding line also inside the vehicle-mounted Radio, when
When vehicle-mounted USB power source line or data line peripheral hardware end shield line cause short circuit, self-recovery fuse can rapid open-circuit line, to reach
To the purpose of protection vehicle power supply and Radio, self- recoverage insurance can independently reply low stopping on state after cooling.This is practical new
Type significantly reduces the short-circuit risks of the vehicle-mounted USB in a variety of situations, and extend vehicle-mounted power supply and Radio uses the longevity
Life.The utility model uses the design of discrete component, Cheap highly effective.
Detailed description of the invention
Fig. 1 is the utility model circuit diagram.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, a kind of anti-short circuit current of vehicle-mounted USB, including USB socket USB_CON, ESD protection pipe D301, capacitor
C004, C080, C011, C0027, C028, C033, C138, zener diode ZD001, ZD002, ZD101, MOSFET pipe Q012,
Triode Q013；
2 feet, 3 feet of the USB socket USB_CON connect 6 feet of ESD protection pipe D301,4 feet, the USB socket respectively
1 foot of USB_CON connects the drain electrode of MOSFET pipe Q012 by resistance R003 ground connection, by resistance R009, MOSFET pipe Q012's
Source electrode connects 5V power output end, and grid passes sequentially through resistance R088, R089 and connects 14V power output end, and the 4 of USB socket USB_CON
Foot ground connection；1 foot of ESD protection pipe D301 connects USB_OTG D- signal end, and 2 feet connect USB_OTG D+ signal end, ESD protection pipe
5 feet of D301 are grounded；
The zener diode ZD001 plus earth, cathode connect between resistance R088 and resistance R089, zener diode
ZD002 anode passes sequentially through resistance R091, R092 ground connection, and cathode connects 1 foot of USB socket USB_CON；Zener diode ZD101
Anode connects the source electrode of MOSFET pipe Q012,2 feet of ESD protection pipe D301 respectively, cathode connect resistance R088 and resistance R089 it
Between；The capacitor C004 is in parallel with resistance R003, and capacitor C011 is in parallel with diode ZD001, and capacitor C027 connects in triode
Between Q013 base stage and ground, capacitor C028 is connect between zener diode ZD101 anode and ground, and capacitor C033 and capacitor C028 are simultaneously
Connection, capacitor C080 are in parallel with capacitor C004；The triode Q013 base stage by resistance R090 connect resistance R091, R092 it
Between, collector connects diode ZD001 cathode, emitter ground connection by resistance R093.
1 foot of the USB socket USB_CON is power end, and 2 feet are data signal output D-, data signal input
D-, 4 feet, 5 feet, 6 feet are ground terminal, and the MOSFET pipe Q012 is N- channel mosfet single tube, the ESD protection pipe D301's
Model NIV1161.
The MOSFET pipe Q012 is the control switch of USB-5V power output end, the voltage at USB-5V power supply interface
When more than 5.6V, zener diode ZD002 will reverse breakdown so that triode Q013 be made to be connected and then manage MOSFET
Q012 cut-off.When the USB_5V power supply line at the peripheral hardware end of vehicle-mounted USB data line is when accidentally touching vehicle-mounted 14V power supply, effectively
It prevents vehicle-mounted 14V power supply output excessive, protects vehicle-mounted 14V power supply.14V power supply is simultaneously effective prevented to pass through vehicle-mounted
USB-5V power supply line, which pours into, damages vehicle-mounted USB interface and Radio.
It in addition to this, is the risk for reducing the short circuit between USB shielding line and vehicle-mounted 14V power supply, the utility model also wraps
Self-recovery fuse F001 and capacitor C138 are included, the self-recovery fuse F001 is in parallel with capacitor C138 to be followed by USB socket
Between 5 feet and ground of USB_CON, 5 feet of USB socket USB_CON connect 6 feet of USB socket USB_CON.Capacitor C138 plays auxiliary
Effect is helped, the voltge surge for the small energy that can release.When the shielding line of vehicle-mounted USB power source line or data line charging interface causes electricity
When short out road, self-recovery fuse can turn off rapidly route, to achieve the purpose that protect vehicle power supply and Radio.
Claims (3)
1. a kind of anti-short circuit current of vehicle-mounted USB, including USB socket USB_CON, ESD protection pipe D301, capacitor C004, C080, institute
State 2 feet of USB socket USB_CON, 3 feet connect 6 feet of ESD protection pipe D301,4 feet respectively, 1 foot of ESD protection pipe D301 connects
USB_OTG D- signal end, 2 feet connect USB_OTG D+ signal end, the 5 feet ground connection of ESD protection pipe D301；It is characterized in that, also wrapping
Include capacitor C011, C0027, C028, C033, C138, zener diode ZD001, ZD002, ZD101, MOSFET pipe Q012, three poles
Pipe Q013；
1 foot of the USB socket USB_CON connects the drain electrode of MOSFET pipe Q012, the source of MOSFET pipe Q012 by resistance R009
Pole connects 5V power output end, and grid passes sequentially through resistance R088, R089 and connects 14V power output end, 4 feet of USB socket USB_CON
Ground connection；
The zener diode ZD001 plus earth, cathode connect between resistance R088 and resistance R089, zener diode
ZD002 anode passes sequentially through resistance R091, R092 ground connection, and cathode connects 1 foot of USB socket USB_CON；Zener diode ZD101
Anode connects the source electrode of MOSFET pipe Q012,2 feet of ESD protection pipe D301 respectively, cathode connect resistance R088 and resistance R089 it
Between；
The capacitor C011 is in parallel with diode ZD001, and capacitor C027 connects between triode Q013 base stage and ground, capacitor C028
It connects between zener diode ZD101 anode and ground, capacitor C033 is in parallel with capacitor C028；
The triode Q013 base stage is connect between resistance R091, R092 by resistance R090, and collector is connect by resistance R093
Diode ZD001 cathode, emitter ground connection.
2. a kind of vehicle-mounted anti-short circuit current of USB according to claim 1, which is characterized in that further include self-recovery fuse
F001 and capacitor C138, the self-recovery fuse F001 is in parallel with capacitor C138 be followed by 5 feet in USB socket USB_CON with
Between ground, 5 feet of USB socket USB_CON connect 6 feet of USB socket USB_CON.
3. a kind of vehicle-mounted anti-short circuit current of USB according to claim 1, which is characterized in that the ESD protection pipe D301's
Model NIV1161.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821095859.5U CN208423760U (en) | 2018-07-11 | 2018-07-11 | The vehicle-mounted anti-short circuit current of USB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821095859.5U CN208423760U (en) | 2018-07-11 | 2018-07-11 | The vehicle-mounted anti-short circuit current of USB |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208423760U true CN208423760U (en) | 2019-01-22 |
Family
ID=65125593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821095859.5U Expired - Fee Related CN208423760U (en) | 2018-07-11 | 2018-07-11 | The vehicle-mounted anti-short circuit current of USB |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208423760U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787317A (en) * | 2019-02-22 | 2019-05-21 | 共青城市超能电子科技有限公司 | Battery and its supply lines on air-ventilating garments |
-
2018
- 2018-07-11 CN CN201821095859.5U patent/CN208423760U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787317A (en) * | 2019-02-22 | 2019-05-21 | 共青城市超能电子科技有限公司 | Battery and its supply lines on air-ventilating garments |
| CN109787317B (en) * | 2019-02-22 | 2023-08-29 | 共青城市超能电子科技有限公司 | Battery on air-conditioning suit and power supply line thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190122 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |