CN203502870U - Voltage compensation device applied to USB concentrator equipment - Google Patents
Voltage compensation device applied to USB concentrator equipment Download PDFInfo
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- CN203502870U CN203502870U CN201320617629.1U CN201320617629U CN203502870U CN 203502870 U CN203502870 U CN 203502870U CN 201320617629 U CN201320617629 U CN 201320617629U CN 203502870 U CN203502870 U CN 203502870U
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Abstract
The utility model relates to a voltage compensation device applied to USB concentrator equipment. The USB concentrator equipment comprises a main USB interface, a power source conversion module, a USB concentrator, a serial port chip and a secondary USB interface, wherein the USB concentrator is respectively connected with the main USB interface, the power source conversion module and the serial port chip, the power source conversion module is connected with the serial port chip, the serial port chip is connected with the secondary USB interface, the voltage compensation device is arranged between the power source conversion module and the serial port chip and comprises a sampling resistor and a compensation circuit which are sequentially connected, one end of the sampling resistor is connected with the power source conversion module, the other end of the sampling resistor is connected with the serial port chip, and the compensation circuit comprises a calculation amplifying unit, a divider resistor, a voltage follower and a field-effect tube which are sequentially connected. Compared with the prior art, the voltage compensation device applied to the USB concentrator equipment automatically compensate voltage decrease on charging, and has the advantages of being high in voltage compensation accuracy, fast in voltage compensation response, capable of flexibly adjusting the voltage compensation range and the like.
Description
Technical field
The utility model relates to a kind of power supply provisioning technique, especially relates to a kind of voltage compensating device for usb hub equipment.
Background technology
Usb hub equipment is generally that computer system is plugged into peripherals as the input/output interface of keyboard, mouse, printer etc., it comprises USB input plug and USB output socket, and the development of automobile industry is applied on automobile usb hub equipment.5V during the standard supply voltage of usb hub equipment, standard output ability is 500mA, along with consumer is more and more to functional requirement, USB load equipment is more and more, power is increasing, well beyond USB design standards, cause USB interface undertension, yet USB load equipment cannot be used, on vehicle-mounted usb hub equipment, all there is no voltage compensating function at present, when the pressure drop on charging wire is enough large, will causes charging port brownout and make the USB interface cannot be to the charging of USB load equipment.
Utility model content
The purpose of this utility model is exactly to provide a kind of voltage compensating device for usb hub equipment in order to overcome the defect of above-mentioned prior art existence.
The purpose of this utility model can be achieved through the following technical solutions: a kind of voltage compensating device for usb hub equipment, described usb hub equipment comprises main USB interface, power transfer module, usb hub, serial port chip and secondary USB interface, described usb hub respectively with main USB interface, power transfer module and serial port chip connect, described power transfer module is connected with serial port chip, described serial port chip is connected with secondary USB interface, it is characterized in that, between described power transfer module and serial port chip, be provided with voltage compensating device, described voltage compensating device comprises sampling resistor and the compensating circuit connecting successively, described sampling resistor one end connects power transfer module, the other end connects serial port chip, described compensating circuit comprises the operation amplifier unit connecting successively, divider resistance, voltage follower and field effect transistor, described operation amplifier unit is connected with sampling resistor, described field effect transistor is connected with power transfer module.
Described operation amplifier unit comprises operational amplifier, the input end of described operational amplifier is connected with sampling resistor two ends respectively, the output terminal of described operational amplifier is connected with described voltage follower by divider resistance, the output terminal of described voltage follower is connected with the grid of field effect transistor, the source electrode of described field effect transistor is connected with the negative input of voltage follower, and the drain electrode of described field effect transistor is connected with power transfer module.
Described power transfer module comprises 12V/5V power conversion unit and the 5V/3.3V power conversion unit connecting successively, described 12V/5V power conversion unit is connected with serial port chip by sampling resistor, and described 5V/3.3V power conversion unit is connected with usb hub.
Compared with prior art, the utlity model has following advantage:
1, can automatically to the pressure drop in charging, compensate.
2, the voltage accuracy of compensation is high.
3, voltage compensation response is fast.
4, the scope of bucking voltage can flexible.
Accompanying drawing explanation
Fig. 1 is the theory diagram that the utility model is applied to usb hub equipment.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
As shown in Figure 1, a kind of voltage compensating device for usb hub equipment, described usb hub equipment comprises main usb 1, power transfer module, usb hub 3, serial port chip 4 and secondary USB interface 5, described usb hub 3 respectively with main usb 1, power transfer module and serial port chip 4 connect, described power transfer module is connected with serial port chip 4, described serial port chip 4 is connected with secondary USB interface 5, described secondary USB interface 5 is connected with load A, it is characterized in that, between described power transfer module and serial port chip 4, be provided with voltage compensating device 6, described voltage compensating device 6 comprises sampling resistor R and the compensating circuit 7 connecting successively, described power transfer module comprises 12V/5V power conversion unit 21 and the 5V/3.3V power conversion unit 22 connecting successively, and described 5V/3.3V power conversion unit 22 is connected with usb hub 3, described sampling resistor R one end connects 12V/5V power conversion unit 21, and the other end connects serial port chip 4, and the input end of described compensating circuit 7 is connected with sampling resistor R, and output terminal is connected with 12V/5V power supply conversion single towering 21.
As shown in Figure 2, described compensating circuit 7 comprises operation amplifier unit 71, divider resistance R5, voltage follower U2A and the field effect transistor Q4 connecting successively, described operation amplifier unit 71 is connected with sampling resistor R, and described field effect transistor Q4 is connected with power transfer module.
Described operation amplifier unit 71 comprises operational amplifier U1A, the input end of described operational amplifier U1A is connected with sampling resistor R two ends respectively, the output terminal of described operational amplifier U1A is connected with described voltage follower U2A by divider resistance R5, the output terminal of described voltage follower U2A is connected with the grid of field effect transistor Q4, the source electrode of described field effect transistor Q4 is connected with the negative input of voltage follower U2A, and the drain electrode of described field effect transistor Q4 is connected with power transfer module.
Principle of work: actual current produces micro voltage by sampling resistor R and falls, through operation amplifier unit, 71 amplify, and by being input to voltage follower U2A after divider resistance R5 dividing potential drop, increase total current in feedback resistance loop after, output to power transfer module, thereby draw high output voltage, carry out the voltage on compensating line.
Claims (3)
1. the voltage compensating device for usb hub equipment, described usb hub equipment comprises main USB interface, power transfer module, usb hub, serial port chip and secondary USB interface, described usb hub respectively with main USB interface, power transfer module and serial port chip connect, described power transfer module is connected with serial port chip, described serial port chip is connected with secondary USB interface, it is characterized in that, between described power transfer module and serial port chip, be provided with voltage compensating device, described voltage compensating device comprises sampling resistor and the compensating circuit connecting successively, described sampling resistor one end connects power transfer module, the other end connects serial port chip, described compensating circuit comprises the operation amplifier unit connecting successively, divider resistance, voltage follower and field effect transistor, described operation amplifier unit is connected with sampling resistor, described field effect transistor is connected with power transfer module.
2. a kind of voltage compensating device for usb hub equipment according to claim 1, it is characterized in that, described operation amplifier unit comprises operational amplifier, the input end of described operational amplifier is connected with sampling resistor two ends respectively, the output terminal of described operational amplifier is connected with described voltage follower by divider resistance, the output terminal of described voltage follower is connected with the grid of field effect transistor, the source electrode of described field effect transistor is connected with the negative input of voltage follower, and the drain electrode of described field effect transistor is connected with power transfer module.
3. a kind of voltage compensating device for usb hub equipment according to claim 1, it is characterized in that, described power transfer module comprises 12V/5V power conversion unit and the 5V/3.3V power conversion unit connecting successively, described 12V/5V power conversion unit is connected with serial port chip by sampling resistor, and described 5V/3.3V power conversion unit is connected with usb hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617629.1U CN203502870U (en) | 2013-10-08 | 2013-10-08 | Voltage compensation device applied to USB concentrator equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320617629.1U CN203502870U (en) | 2013-10-08 | 2013-10-08 | Voltage compensation device applied to USB concentrator equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203502870U true CN203502870U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320617629.1U Expired - Fee Related CN203502870U (en) | 2013-10-08 | 2013-10-08 | Voltage compensation device applied to USB concentrator equipment |
Country Status (1)
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| CN (1) | CN203502870U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105446918A (en) * | 2015-12-02 | 2016-03-30 | 青岛海信移动通信技术股份有限公司 | USB HUB power circuit and USB HUB |
| CN107317601A (en) * | 2017-08-24 | 2017-11-03 | 合肥文武信息技术有限公司 | A kind of hub architecture with compensation function |
| CN109391007A (en) * | 2018-11-16 | 2019-02-26 | 北汽福田汽车股份有限公司 | Vehicle, charging unit |
-
2013
- 2013-10-08 CN CN201320617629.1U patent/CN203502870U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105446918A (en) * | 2015-12-02 | 2016-03-30 | 青岛海信移动通信技术股份有限公司 | USB HUB power circuit and USB HUB |
| CN105446918B (en) * | 2015-12-02 | 2018-01-09 | 青岛海信移动通信技术股份有限公司 | A kind of USB HUB power circuit and USB HUB |
| CN107317601A (en) * | 2017-08-24 | 2017-11-03 | 合肥文武信息技术有限公司 | A kind of hub architecture with compensation function |
| CN109391007A (en) * | 2018-11-16 | 2019-02-26 | 北汽福田汽车股份有限公司 | Vehicle, charging unit |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20171008 |