CN203326299U - USB data line with current-limiting protection - Google Patents
USB data line with current-limiting protection Download PDFInfo
- Publication number
- CN203326299U CN203326299U CN2013204126048U CN201320412604U CN203326299U CN 203326299 U CN203326299 U CN 203326299U CN 2013204126048 U CN2013204126048 U CN 2013204126048U CN 201320412604 U CN201320412604 U CN 201320412604U CN 203326299 U CN203326299 U CN 203326299U
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- resistance
- piezo
- usb interface
- current
- usb
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- Expired - Fee Related
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Abstract
The utility model discloses a USB data line with current-limiting protection. The USB data line comprises a USB interface chip, a current-limiting resistor R1, a fuse FR1 and a USB interface, wherein the current-limiting resistor R1 and the fuse FR1 are connected in series between the power supply pins Vd of the USB interface chip and the USB interface. The resettable fuse is arranged in the USB plug end, so that when a charging current exceeds a certain limitation, the circuit is cut off automatically, so that the cost is low, and the safety and reliability are achieved.
Description
Technical field
The utility model relates to a kind of usb data line circuit, particularly a kind of usb data line that carries current-limiting protection.
Background technology
The usb data line of existing mobile phones universal is nearly all general.Therefore the consumer reuses back and forth on the PC of being everlasting, on notebook, between charging head, charging treasured.Access times are many, and the electrical equipment type of coupling is also many, but no matter are charging wires, and power supply, still be recharged equipment, as long as one brings out problem and may damage other equipment.
Existing usb data line adopts an Antistatic chip to prevent the electrostatic current of burst usually, and the anti-static circuit formed than original piezo-resistance on performance is slightly good, but on price, has just exceeded many.And, for the high electric current of burst and the electric current reply situation overloaded, just extremely allow of no optimist.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art; a kind of usb data line that carries current-limiting protection is provided; it provides a kind of self-healing fuse; can prevent the high electric current that can not load; safe and reliable; the antistatic ESD circuit that simultaneously also has piezo-resistance to form, simple in structure, with low cost.
The purpose of this utility model is achieved through the following technical solutions: it comprises USB interface chip, current-limiting resistance R1, fuse FR1 and USB interface; Current-limiting resistance R1 and fuse FR1 are connected between the power pins Vd of USB interface chip and USB interface.
The utility model also comprises electrostatic discharge protection circuit, described electrostatic discharge protection circuit comprises the first piezo-resistance RV1, the second piezo-resistance RV2, the 3rd piezo-resistance RV3 and the 4th piezo-resistance RV4, the end of the first piezo-resistance RV1 is connected with the power pins Vd of USB interface chip, the end of the second piezo-resistance RV2 is connected with the first data wire pin D+ of USB interface chip, the end of the 3rd piezo-resistance RV3 is connected with the second data wire pin D-of USB interface chip, and the end of the 4th piezo-resistance RV4 is connected with the grounding pin GND of USB interface chip; The first piezo-resistance RV1, the second piezo-resistance RV2, the 3rd piezo-resistance RV3 and the 4th piezo-resistance RV4 are altogether.
Fuse FR1 described in the utility model is resettable fuse.
The beneficial effects of the utility model are: at the built-in resettable fuse of original USB plug end, when charging current surpasses certain limit, automatically cut off, safe and reliable, the electrostatic discharge protection circuit that simultaneously also has piezo-resistance to form, simple in structure, with low cost, charging security has obtained abundant guarantee.
The accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail, but protection range of the present utility model is not limited to the following stated.
As shown in Figure 1, a kind of usb data line that carries current-limiting protection, it comprises USB interface chip, current-limiting resistance R1, fuse FR1 and USB interface; Current-limiting resistance R1 and fuse FR1 are connected between the power pins Vd of USB interface chip and USB interface, and described fuse FR1 is resettable fuse.
Particularly, it also comprises electrostatic discharge protection circuit, described electrostatic discharge protection circuit comprises the first piezo-resistance RV1, the second piezo-resistance RV2, the 3rd piezo-resistance RV3 and the 4th piezo-resistance RV4, the end of the first piezo-resistance RV1 is connected with the power pins Vd of USB interface chip, the end of the second piezo-resistance RV2 is connected with the first data wire pin D+ of USB interface chip, the end of the 3rd piezo-resistance RV3 is connected with the second data wire pin D-of USB interface chip, and the end of the 4th piezo-resistance RV4 is connected with the grounding pin GND of USB interface chip; The first piezo-resistance RV1, the second piezo-resistance RV2, the 3rd piezo-resistance RV3 and the 4th piezo-resistance RV4 are altogether.
Claims (3)
1. a usb data line that carries current-limiting protection, it is characterized in that: it comprises USB interface chip, current-limiting resistance R1, fuse FR1 and USB interface; Current-limiting resistance R1 and fuse FR1 are connected between the power pins Vd of USB interface chip and USB interface.
2. a kind of usb data line that carries current-limiting protection according to claim 1, it is characterized in that: it also comprises electrostatic discharge protection circuit, described electrostatic discharge protection circuit comprises the first piezo-resistance RV1, the second piezo-resistance RV2, the 3rd piezo-resistance RV3 and the 4th piezo-resistance RV4, the end of the first piezo-resistance RV1 is connected with the power pins Vd of USB interface chip, the end of the second piezo-resistance RV2 is connected with the first data wire pin D+ of USB interface chip, the end of the 3rd piezo-resistance RV3 is connected with the second data wire pin D-of USB interface chip, the end of the 4th piezo-resistance RV4 is connected with the grounding pin GND of USB interface chip, the first piezo-resistance RV1, the second piezo-resistance RV2, the 3rd piezo-resistance RV3 and the 4th piezo-resistance RV4 are altogether.
3. a kind of usb data line that carries current-limiting protection according to claim 1, it is characterized in that: described fuse FR1 is resettable fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204126048U CN203326299U (en) | 2013-07-12 | 2013-07-12 | USB data line with current-limiting protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204126048U CN203326299U (en) | 2013-07-12 | 2013-07-12 | USB data line with current-limiting protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203326299U true CN203326299U (en) | 2013-12-04 |
Family
ID=49665594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204126048U Expired - Fee Related CN203326299U (en) | 2013-07-12 | 2013-07-12 | USB data line with current-limiting protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203326299U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135148A (en) * | 2014-07-17 | 2014-11-05 | 青岛歌尔声学科技有限公司 | USB (Universal Serial Bus) interface circuit |
| CN106295427A (en) * | 2016-08-09 | 2017-01-04 | 珠海溢思得瑞科技创新研究院有限公司 | Safety protection equipment, interface and nucleus equipment |
-
2013
- 2013-07-12 CN CN2013204126048U patent/CN203326299U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135148A (en) * | 2014-07-17 | 2014-11-05 | 青岛歌尔声学科技有限公司 | USB (Universal Serial Bus) interface circuit |
| CN106295427A (en) * | 2016-08-09 | 2017-01-04 | 珠海溢思得瑞科技创新研究院有限公司 | Safety protection equipment, interface and nucleus equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20150712 |
|
| EXPY | Termination of patent right or utility model |