CN204191002U - Can the LED drive circuit of anti-2KV surge voltage - Google Patents
Can the LED drive circuit of anti-2KV surge voltage Download PDFInfo
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- CN204191002U CN204191002U CN201420656703.5U CN201420656703U CN204191002U CN 204191002 U CN204191002 U CN 204191002U CN 201420656703 U CN201420656703 U CN 201420656703U CN 204191002 U CN204191002 U CN 204191002U
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- bridge heap
- electric capacity
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- resistance
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Abstract
The utility model provide a kind of can the LED drive circuit of anti-2KV surge voltage, comprise power input, power input L connects fuse to bridge heap input 1, power input N is connected to bridge heap input 3, bridge heap input (1,3) connects electric capacity, bridge heap exports positive and negative electrode and connects electric capacity, bridge heap positive pole access inductance, contact resistance is held to power supply chip ST, ST holds contact resistance to Q1, chip ST holds connection electric capacity and TVS pipe to GND, and positive pole inductance connection electric capacity and piezo-resistance are to GND, and bridge heap negative pole connects inductance to GND.The utility model combinationally uses the unidirectional TVS pipe of piezo-resistance, differential mode inductance and low pressure, effectively improves the defect that single-stage PFC+FLYBACK isolated LED drive power antisurge is weak, antisurge grade is promoted to 2KV from 0.5KV.
Description
Technical field
The utility model relates to LED drive power field, particularly relate to a kind of can the LED drive circuit of anti-2KV surge voltage.
Background technology
The isolated power supply of current single-stage PFC+FLYBACK is widely used in LED and drives, and the application of below 25W LED drive power is in the majority, this type of circuit power factor is high, structure simply, easily miniaturized.Due to single-stage PFC+FLYBACK structure, power input does not have jumbo electric capacity, makes surge voltage be easy to enter circuit control system, causes power supply to damage.
Usually a piezo-resistance is increased to defend surge voltage at input, although certification authority's power supply determine within 25W that is situated between can be met to be met 0.5KV surge voltage and test, but in actual applications, a lot of countries and regions power network fluctuation is frequent, voltage ripple of power network is abnormal, and only the surge voltage restriction of 0.5KV cannot meet user demand.Promote wave resistance and emerge in large numbers grade, have two kinds of modes: the antisurge energy grade one, improving piezo-resistance, such voltage-dependent resistor can be very large, affects original project organization; Two, select to increase high-voltage bidirectional TVS pipe at power input, although can promote Anti-surging grade, cost is relatively too high, generally can not select.
Summary of the invention
The utility model promotes antisurge difficult point for the isolated LED drive circuit of existing single-stage PFC+FLYBACK, is studied improvement, provide a kind of can the LED drive circuit of anti-2KV surge voltage.
The technical solution of the utility model is as follows:
A kind of can the LED drive circuit of anti-2KV surge voltage, it is characterized in that: comprise power input (L, N), power input L connects fuse (F1) to bridge heap (BD1) 1 pin, power input N is connected to bridge heap (BD1) 3 pin, bridge heap (BD1) 1,3 pin connects safety electric capacity (CX1) and piezo-resistance (VR1), composition capable AC end input circuit; Bridge heap (BD1) 2,4 pin connects electric capacity (C1), bridge heap (BD1) 2 pin connects differential mode inductance (L1), differential mode inductance (L1) connects piezo-resistance (VR2) and electric capacity (C2) to GND, and bridge heap (BD1) 4 pin connects differential mode inductance (L2) and forms power supply high-pressure side current supply circuit to GND; Differential mode inductance (L1) contact resistance (R6) is held to chip ST, and chip ST holds and connects TVS pipe (D5) and electric capacity (C5) to GND, and contact resistance (R7) is held to metal-oxide-semiconductor Q1 G, forms power control terminal and to power telegram in reply road.
Advantageous Effects of the present utility model is: access same model piezo-resistance respectively at the bridge heap AC and DC end of LED power, connect piezo-resistance again after bridge heap DC terminal positive and negative electrode connects differential mode inductance respectively, power supply chip ST holds and connects TVS pipe to GND.The effect of piezo-resistance and TVS pipe suppresses surge voltage, and differential mode inductance series connection uses in circuit and also effectively can suppress surge voltage.When surge voltage enters power supply, first through exchanging end piezo-resistance attenuation of the first kind, through rectifier bridge through differential mode inductance and DC terminal piezo-resistance secondary extinction, remaining surge voltage, through the decay again of resistance and TVS pipe, ensure that the voltage entering power supply chip and metal-oxide-semiconductor is normal working voltage.Not only cost is lower to adopt segmentation to block the mode of surge voltage, effectively power supply antisurge grade can also be promoted to 2KV from 0.5KV, greatly improve the grid adaptability of the isolated LED drive power of single-stage PFC+FLYBACK in different regions, solve the problem causing damage because surge voltage is too high.
Accompanying drawing explanation
Fig. 1 is the preferred circuit theory diagrams of one of the present utility model.
Embodiment
Be described further below in conjunction with the embodiment of accompanying drawing to utility model.
As shown in Figure 1, the utility model comprises power input (L, N), power input L connects fuse (F1) to bridge heap (BD1) 1 pin, power input N is connected to bridge heap (BD1) 3 pin, bridge heap (BD1) 1,3 pin connects safety electric capacity (CX1) and piezo-resistance (VR1), composition capable AC end input circuit; Bridge heap (BD1) 2,4 pin connects electric capacity (C1), bridge heap (BD1) 2 pin connects differential mode inductance (L1), differential mode inductance (L1) connects piezo-resistance (VR2) and electric capacity (C2) to GND, and bridge heap (BD1) 4 pin connects differential mode inductance (L2) and forms power supply high-pressure side current supply circuit to GND; Differential mode inductance (L1) contact resistance (R6) is held to chip ST, and chip ST holds and connects TVS pipe (D5) and electric capacity (C5) to GND, and contact resistance (R7) is held to metal-oxide-semiconductor Q1 G, forms power control terminal and to power telegram in reply road.
Operation principle of the present utility model is as follows:
When electrical network surge voltage once decays through exchanging end piezo-resistance VR1, resist through the combination of bridge heap through L1, L2 differential mode inductance and VR2 piezo-resistance, surge voltage major part decay, by the decay again of dropping resistor R6 and the unidirectional TVS pipe of low pressure, the surge voltage entering power supply chip ST end and metal-oxide-semiconductor Q1 disappears substantially, circuit can not damage because of surge voltage impact, ensure that the long-life of LED lamp.
Main components table in Fig. 1:
Above-described is only preferred implementation of the present utility model, and the utility model is not limited to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive or associate under the prerequisite not departing from spirit of the present utility model and design, all should think and be included within protection range of the present utility model.
Claims (1)
1. one kind can the LED drive circuit of anti-2KV surge voltage, it is characterized in that: comprise power input (L, N), power input L connects fuse (F1) to bridge heap (BD1) 1 pin, power input N is connected to bridge heap (BD1) 3 pin, bridge heap (BD1) 1,3 pin connects safety electric capacity (CX1) and piezo-resistance (VR1), composition capable AC end input circuit; Bridge heap (BD1) 2,4 pin connects electric capacity (C1), bridge heap (BD1) 2 pin connects differential mode inductance (L1), differential mode inductance (L1) connects piezo-resistance (VR2) and electric capacity (C2) to GND, and bridge heap (BD1) 4 pin connects differential mode inductance (L2) and forms power supply high-pressure side current supply circuit to GND; Differential mode inductance (L1) contact resistance (R6) is held to chip ST, and chip ST holds and connects unidirectional TVS pipe (D5) and electric capacity (C5) to GND, and contact resistance (R7) is held to metal-oxide-semiconductor Q1 G, forms power control terminal and to power telegram in reply road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420656703.5U CN204191002U (en) | 2014-11-06 | 2014-11-06 | Can the LED drive circuit of anti-2KV surge voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420656703.5U CN204191002U (en) | 2014-11-06 | 2014-11-06 | Can the LED drive circuit of anti-2KV surge voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204191002U true CN204191002U (en) | 2015-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420656703.5U Expired - Fee Related CN204191002U (en) | 2014-11-06 | 2014-11-06 | Can the LED drive circuit of anti-2KV surge voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204191002U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109348571A (en) * | 2018-10-08 | 2019-02-15 | 浙江智森电子科技有限公司 | A kind of LED drive power of anti-lightning strike antisurge |
| CN110797853A (en) * | 2019-11-21 | 2020-02-14 | 东莞市鹏为科技有限公司 | Lightning protection circuit and lightning protection street lamp |
-
2014
- 2014-11-06 CN CN201420656703.5U patent/CN204191002U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109348571A (en) * | 2018-10-08 | 2019-02-15 | 浙江智森电子科技有限公司 | A kind of LED drive power of anti-lightning strike antisurge |
| CN110797853A (en) * | 2019-11-21 | 2020-02-14 | 东莞市鹏为科技有限公司 | Lightning protection circuit and lightning protection street lamp |
| CN110797853B (en) * | 2019-11-21 | 2021-12-07 | 东莞市鹏为科技有限公司 | Lightning protection circuit and lightning protection street lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190227 Address after: 211100 Jiangsu Province Jiangning District High-tech Park Corning Road 777A Patentee after: JIANGSU HANDESEN INTELLIGENT TECHNOLOGY CO.,LTD. Address before: 211100 No. 777 Kening Road, Jiangning Science Park, Nanjing City, Jiangsu Province Patentee before: NANJING HANDSON Co.,Ltd. |
|
| 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: 20150304 Termination date: 20211106 |