CN205726521U - A kind of support controllable silicon light modulation LED drive circuit - Google Patents
A kind of support controllable silicon light modulation LED drive circuit Download PDFInfo
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- CN205726521U CN205726521U CN201620307208.2U CN201620307208U CN205726521U CN 205726521 U CN205726521 U CN 205726521U CN 201620307208 U CN201620307208 U CN 201620307208U CN 205726521 U CN205726521 U CN 205726521U
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- light modulation
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- led drive
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Abstract
The utility model discloses a kind of support controllable silicon light modulation LED drive circuit, including input rectifying filter circuit, circuit for power conversion, output rectifier and filter, the PWM controller being built-in with comparator and voltage feedback circuit；Described input rectifying filter circuit, circuit for power conversion and output rectifier and filter are sequentially connected, and output rectifier and filter also connects PWM controller through voltage feedback circuit simultaneously, and described input rectifying filter circuit connects PWM controller.
Description
Technical field
This utility model relates to LED drive circuit technical field, particularly relates to a kind of support controllable silicon light modulation LED drive circuit.
Background technology
Light emitting diode (LED) technology has reached its maturity and has had the features such as luminous efficiency height, length in service life due to it, so it is the most very urgent to replace traditional electric filament lamp on lighting field at present.Owing to the requirement of LED drive circuit is also being improved constantly by industry, high reliability, high efficiency, high constant current accuracy, low system cost, little circuit size and security isolation etc. become the guardian technique index of LED drive circuit.The secondary side current constant control scheme that in prior art, LED drive circuit uses, structure is complicated, and components and parts are many, and system cost is high, is unfavorable for reducing the volume of LED driver.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of circuit is simple, be conducive to keeping the support controllable silicon light modulation LED drive circuit of voltage stabilization.
In order to realize object above, this utility model be the technical scheme is that
A kind of support controllable silicon light modulation LED drive circuit, including input rectifying filter circuit, circuit for power conversion, output rectifier and filter, the PWM controller being built-in with comparator and voltage feedback circuit；Described input rectifying filter circuit, circuit for power conversion and output rectifier and filter are sequentially connected, and output rectifier and filter also connects PWM controller through voltage feedback circuit simultaneously, and described input rectifying filter circuit connects PWM controller.
Further, producing the RC circuit of LED flicker when described input rectifying filter circuit includes for avoiding light modulation, described RC circuit includes a resistance and two electric capacity, and wherein this resistance and a capacitances in series are the most in parallel with another electric capacity.
Preferably, the output voltage of described input rectifying filter circuit is 1.41 times of input voltage.
The beneficial effects of the utility model are: AC rectification can be unidirectional current by the input rectifying filter circuit in LED drive circuit of the present utility model, pass sequentially through circuit for power conversion conversion power and output rectifier and filter rectification exports to LED, provide electric current for LED.Voltage feedback circuit can detect that the curent change of output, is automatically adjusted output by the comparator within PWM controller, makes outputting current steadily.
Accompanying drawing explanation
Fig. 1 is electricity theory diagram of the present utility model.
Fig. 2 position circuit diagram of the present utility model.
Detailed description of the invention
It is described in further detail in conjunction with the drawings and specific embodiments technical scheme required for protection to this utility model.
Seeing shown in accompanying drawing 1 and accompanying drawing 2, a kind of of the present embodiment supports controllable silicon light modulation LED drive circuit, including input rectifying filter circuit, circuit for power conversion, output rectifier and filter, the PWM controller being built-in with comparator and voltage feedback circuit.In the present embodiment, the RC circuit of LED flicker is produced when described input rectifying filter circuit includes for avoiding light modulation, described RC circuit includes resistance R7 and C1, two electric capacity of C2, wherein this resistance R7 and electric capacity C1 connects the most in parallel with electric capacity C2, and this RC circuit is positioned over positive level BD1+ of main line and earth terminal.Described input rectifying filter circuit, circuit for power conversion and output rectifier and filter are sequentially connected, and output rectifier and filter also connects PWM controller through voltage feedback circuit simultaneously, and described input rectifying filter circuit connects PWM controller.
AC rectification can be unidirectional current by the input rectifying filter circuit in the LED drive circuit of the present embodiment, and in the present embodiment, the output voltage of input rectifying filter circuit is 1.41 times of input voltage, so the voltage of LED must be higher than input voltage；Electric current passes sequentially through circuit for power conversion conversion power and output rectifier and filter rectification exports to LED, provides electric current for LED.Voltage feedback circuit can detect that the curent change of output, and voltage feedback circuit feeds back to 1 foot of PWM controller U1 by the change of resistance R2 and R5 detection output electric current, is automatically adjusted output by the comparator within PWM controller, makes outputting current steadily.
The embodiment of the above is only preferred embodiment of the present utility model, and this utility model not does any pro forma restriction.Any those of ordinary skill in the art, without departing under technical solutions of the utility model ambit, technical solutions of the utility model are made more possible variation and retouching by the technology contents that all may utilize the disclosure above, or are revised as the Equivalent embodiments of equivalent variations.Therefore all contents without departing from technical solutions of the utility model, the equivalent equivalence change made according to the thinking of this utility model, all should be covered by protection domain of the present utility model.
Claims (3)
1. support controllable silicon light modulation LED drive circuit for one kind, it is characterised in that: include input rectifying filter circuit, circuit for power conversion, output rectifier and filter, the PWM controller being built-in with comparator and voltage feedback circuit；Described input rectifying filter circuit, circuit for power conversion and output rectifier and filter are sequentially connected, and output rectifier and filter also connects PWM controller through voltage feedback circuit simultaneously, and described input rectifying filter circuit connects PWM controller.
A kind of support controllable silicon light modulation LED drive circuit the most according to claim 1, it is characterized in that: when described input rectifying filter circuit includes for avoiding light modulation, produce the RC circuit of LED flicker, described RC circuit includes a resistance and two electric capacity, and wherein this resistance and a capacitances in series are the most in parallel with another electric capacity.
A kind of support controllable silicon light modulation LED drive circuit the most according to claim 1, it is characterised in that: the output voltage of described input rectifying filter circuit is 1.41 times of input voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620307208.2U CN205726521U (en) | 2016-04-13 | 2016-04-13 | A kind of support controllable silicon light modulation LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620307208.2U CN205726521U (en) | 2016-04-13 | 2016-04-13 | A kind of support controllable silicon light modulation LED drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205726521U true CN205726521U (en) | 2016-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620307208.2U Expired - Fee Related CN205726521U (en) | 2016-04-13 | 2016-04-13 | A kind of support controllable silicon light modulation LED drive circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN205726521U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106686826A (en) * | 2017-02-09 | 2017-05-17 | 中山自信照明科技有限公司 | Led lighting power supply circuit |
| CN108966416A (en) * | 2018-07-11 | 2018-12-07 | 昆山仕优威电子科技有限公司 | A kind of control system of UV LED light source |
| CN112153776A (en) * | 2020-09-18 | 2020-12-29 | 宜昌江景光电有限公司 | Driving power supply circuit for wirelessly controlling LED and LED lamp |
-
2016
- 2016-04-13 CN CN201620307208.2U patent/CN205726521U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106686826A (en) * | 2017-02-09 | 2017-05-17 | 中山自信照明科技有限公司 | Led lighting power supply circuit |
| CN108966416A (en) * | 2018-07-11 | 2018-12-07 | 昆山仕优威电子科技有限公司 | A kind of control system of UV LED light source |
| CN112153776A (en) * | 2020-09-18 | 2020-12-29 | 宜昌江景光电有限公司 | Driving power supply circuit for wirelessly controlling LED and LED lamp |
| CN112153776B (en) * | 2020-09-18 | 2023-03-17 | 宜昌江景光电有限公司 | Driving power supply circuit for wirelessly controlling LED and LED lamp |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20200413 |