CN204014158U - LED room lighting thyristor regulating light drive circuit - Google Patents
LED room lighting thyristor regulating light drive circuit Download PDFInfo
- Publication number
- CN204014158U CN204014158U CN201420139479.2U CN201420139479U CN204014158U CN 204014158 U CN204014158 U CN 204014158U CN 201420139479 U CN201420139479 U CN 201420139479U CN 204014158 U CN204014158 U CN 204014158U
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- circuit
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- led
- connects
- reversed excitation
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Abstract
The utility model relates to drive circuit technical field, relate in particular to LED room lighting thyristor regulating light drive circuit, it comprises circuit of reversed excitation, maintain current compensation circuit, adjusting control circuit, pwm chip, pi regulator and LED lamp, has cost lower, the advantage that stability is higher.
Description
Technical field
The utility model relates to drive circuit technical field, relates in particular to LED room lighting thyristor regulating light drive circuit.
Background technology
In recent years, high-brightness LED illumination is progressively replacing the conventional light source such as incandescent lamp, fluorescent lamp with high light efficiency, long-life, high reliability and the advantage such as pollution-free.In some applications, wish the brightness of lamp light adjustable in some cases, so that further energy-conservation and comfortable illumination is provided.Common light modulation has bidirectional triode thyristor light modulation, rear along light modulation, ON/OFF light modulation, remote control light modulating etc.Controllable silicon dimmer is applied for a long time at lighting dimmings such as traditional incandescent lamps, and need not change wiring, installation cost is lower, performance and the specification of various brands controllable silicon dimmer are more or less the same, but it is directly applied in LED, to drive occasion also to exist a series of such as the higher and lower problem of stability of cost.
Summary of the invention
The purpose of this utility model is to provide a kind of LED room lighting thyristor regulating light drive circuit for the deficiencies in the prior art, has cost lower, the advantage that stability is higher.
For achieving the above object, the utility model adopts following technical scheme: LED room lighting thyristor regulating light drive circuit, and it comprises circuit of reversed excitation, maintains current compensation circuit, adjusting control circuit, pwm chip, pi regulator and LED lamp; The input of described circuit of reversed excitation connects input power, the input of circuit of reversed excitation is connected with resistance R 1, maintain the input that current compensation circuit is connected in circuit of reversed excitation, the output of circuit of reversed excitation connects the input of LED lamp and pi regulator, the output of pi regulator connects pwm chip, and pwm chip connects described circuit of reversed excitation; Described adjusting control circuit comprises the comparator, RC charge-discharge circuit and the gain circuitry that connect successively, and comparator connects input power, and the output of gain circuitry connects the input of pi regulator.
LED lamp is composed in parallel by three string LED series lamp groups.
The utility model beneficial effect is: LED room lighting thyristor regulating light drive circuit described in the utility model, has cost lower, the advantage that stability is higher.
Brief description of the drawings
Accompanying drawing 1 is schematic block circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described: as shown in Figure 1, LED room lighting thyristor regulating light drive circuit described in the utility model, it comprises circuit of reversed excitation, maintains current compensation circuit, adjusting control circuit, pwm chip, pi regulator and LED lamp; The input of described circuit of reversed excitation connects input power, the input of circuit of reversed excitation is connected with resistance R 1, maintain the input that current compensation circuit is connected in circuit of reversed excitation, the output of circuit of reversed excitation connects the input of LED lamp and pi regulator, the output of pi regulator connects pwm chip, and pwm chip connects described circuit of reversed excitation; Described adjusting control circuit comprises the comparator, RC charge-discharge circuit and the gain circuitry that connect successively, and comparator connects input power, and the output of gain circuitry connects the input of pi regulator.LED lamp is composed in parallel by three string LED series lamp groups, can drive individual LED work simultaneously.
When work, maintain current compensation circuit and control and flow through the electric current that maintains current compensation circuit by detection resistance R 1 terminal voltage.When input current hour, maintain and on current compensation circuit, flow through larger electric current; In the time that input current is larger, maintain current compensation circuit and turn-off, maintain current compensation and ensure that with the form of constant-current source silicon controlled maintains electric current.This circuit utilizes common pulse-width modulation PWM control chip to build the LED drive circuit of controllable silicon light modulation in conjunction with peripheral circuit, has cost lower, the advantage that stability is higher.
The above is only preferred embodiments of the present utility model, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.
Claims (2)
1.LED room lighting thyristor regulating light drive circuit, is characterized in that: it comprises circuit of reversed excitation, maintains current compensation circuit, adjusting control circuit, pwm chip, pi regulator and LED lamp; The input of described circuit of reversed excitation connects input power, the input of circuit of reversed excitation is connected with resistance R 1, maintain the input that current compensation circuit is connected in circuit of reversed excitation, the output of circuit of reversed excitation connects the input of LED lamp and pi regulator, the output of pi regulator connects pwm chip, and pwm chip connects described circuit of reversed excitation; Described adjusting control circuit comprises the comparator, RC charge-discharge circuit and the gain circuitry that connect successively, and comparator connects input power, and the output of gain circuitry connects the input of pi regulator.
2. LED room lighting thyristor regulating light drive circuit according to claim 1, is characterized in that: LED lamp is composed in parallel by three string LED series lamp groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420139479.2U CN204014158U (en) | 2014-03-26 | 2014-03-26 | LED room lighting thyristor regulating light drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420139479.2U CN204014158U (en) | 2014-03-26 | 2014-03-26 | LED room lighting thyristor regulating light drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204014158U true CN204014158U (en) | 2014-12-10 |
Family
ID=52054094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420139479.2U Expired - Fee Related CN204014158U (en) | 2014-03-26 | 2014-03-26 | LED room lighting thyristor regulating light drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204014158U (en) |
-
2014
- 2014-03-26 CN CN201420139479.2U patent/CN204014158U/en not_active Expired - Fee Related
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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: 20141210 Termination date: 20150326 |
|
| EXPY | Termination of patent right or utility model |