CN204425735U - A kind of LED voltage increase and current constant source and LED lamp - Google Patents
A kind of LED voltage increase and current constant source and LED lamp Download PDFInfo
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- CN204425735U CN204425735U CN201520113623.XU CN201520113623U CN204425735U CN 204425735 U CN204425735 U CN 204425735U CN 201520113623 U CN201520113623 U CN 201520113623U CN 204425735 U CN204425735 U CN 204425735U
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Abstract
The utility model discloses a kind of LED voltage increase and current constant source and LED lamp.This LED voltage increase and current constant source comprises LED/lamp group, governor circuit, DC-DC booster circuit, voltage detecting circuit, high-low pressure testing circuit, DC-DC power source and light-coupled isolation switch; Light-coupled isolation switch access PWM dim signal is also transported to governor circuit; DC-DC power source access direct current is also connected with light-coupled isolation switch; The test side of high-low pressure testing circuit is connected with direct current, and output is connected with governor circuit; The test side of voltage detecting circuit is connected with DC-DC booster circuit, and output is connected with governor circuit; The output of governor circuit is connected with DC-DC booster circuit; The input access direct current of DC-DC booster circuit, the output of DC-DC booster circuit is connected with LED/lamp group.This programme reduces circuit production cost, has saved the design space needed for circuit.
Description
Technical field
The utility model relates to LED field, particularly relates to a kind of LED voltage increase and current constant source and LED lamp.
Background technology
LED in use, for ensureing that using state is stablized, increasing the service life, usually needing constant-current source.
But plurality of LEDs is connected, and often needs LED multi-path to drive, causes the cost increase of LED lamp, the space requirement of circuit design increases.
Utility model content
The utility model provides a kind of LED voltage increase and current constant source and LED lamp, it is by arranging governor circuit, DC-DC booster circuit, voltage detecting circuit, high-low pressure testing circuit, PWM dim signal is accessed by light-coupled isolation switch, the stabling current needed for LED/lamp group is generated in the mode of boosting, reduce circuit production cost, save the design space needed for circuit.
For realizing above-mentioned design, the utility model by the following technical solutions:
Provide a kind of LED voltage increase and current constant source on the one hand, comprise LED/lamp group, also comprise: governor circuit, DC-DC booster circuit, voltage detecting circuit, high-low pressure testing circuit, DC-DC power source and light-coupled isolation switch; The input access PWM dim signal of described light-coupled isolation switch, the output of described light-coupled isolation switch is connected with the input of described governor circuit; Described DC-DC power source access external dc power input is also connected with described light-coupled isolation switch; The test side of described high-low pressure testing circuit is connected with the input of described external dc power, and the output of described high-low pressure testing circuit is connected with described governor circuit; The test side of described voltage detecting circuit is connected with described DC-DC booster circuit, and the output of described voltage detecting circuit is connected with described governor circuit, and the output of described governor circuit is connected with described DC-DC booster circuit; The input access external dc power input of described DC-DC booster circuit, the output of described DC-DC booster circuit is connected with LED/lamp group.
Wherein, also comprise temperature detect switch (TDS), described light-coupled isolation switch is connected by temperature detect switch (TDS) with described DC-DC power source.
Wherein, also comprise short-circuit protection circuit, one end of described short-circuit protection circuit is connected with described LED/lamp group, and the other end is connected with described governor circuit.
Wherein, also comprise constant-current drive circuit and current detection circuit, one end of described constant-current drive circuit is connected with described LED/lamp group, and the other end is connected with one end of described current detection circuit; The other end of described current detection circuit is connected with described governor circuit.
Additionally provide a kind of LED lamp on the other hand, be provided with the LED voltage increase and current constant source described in above-mentioned any one.
The beneficial effects of the utility model are: by arranging governor circuit, DC-DC booster circuit, voltage detecting circuit, high-low pressure testing circuit, PWM dim signal is accessed by light-coupled isolation switch, the stabling current needed for LED/lamp group is generated in the mode of boosting, reduce circuit production cost, save the design space needed for circuit.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, be briefly described to the accompanying drawing used required in the description of the utility model embodiment below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the content of the utility model embodiment and these accompanying drawings.
Fig. 1 is the structural representation in a kind of LED voltage increase and current constant source provided in the utility model embodiment.
Embodiment
The technical problem solved for making the utility model, the technical scheme of employing and the technique effect that reaches are clearly, be described in further detail below in conjunction with the technical scheme of accompanying drawing to the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those skilled in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1, the structural representation in a kind of LED voltage increase and current constant source provided in its utility model embodiment.As shown in the figure, this LED voltage increase and current constant source, comprises LED/lamp group 103, also comprises: governor circuit 109, DC-DC booster circuit 102, voltage detecting circuit 105, high-low pressure testing circuit 104, DC-DC power source 108 and light-coupled isolation switch 112; The input access PWM dim signal of described light-coupled isolation switch 112, the input of described light-coupled isolation switch 112 is connected with the input of described governor circuit 109; Described DC-DC power source 108 accesses external dc power input 101 and is connected with described light-coupled isolation switch 112; Test side and the described external dc power of described high-low pressure testing circuit 104 input 101 and are connected, and the output of described high-low pressure testing circuit 104 is connected with described governor circuit 109; The test side of described voltage detecting circuit 105 is connected with described DC-DC booster circuit 102, and the output of described voltage detecting circuit 105 is connected with described governor circuit 109, and the output of described governor circuit 109 is connected with described DC-DC booster circuit 102; The input access external dc power input 101 of described DC-DC booster circuit 102, the output of described DC-DC booster circuit 102 is connected with LED/lamp group 103.
Preferably, also comprise temperature detect switch (TDS) 110, described light-coupled isolation switch 112 is connected by temperature detect switch (TDS) 110 with described DC-DC power source 108.
Preferably, also comprise short-circuit protection circuit 106, one end of described short-circuit protection circuit 106 is connected with described LED/lamp group 103, and the other end is connected with described governor circuit 109.
Preferably, also comprise constant-current drive circuit 107 and current detection circuit 111, one end of described constant-current drive circuit 107 is connected with described LED/lamp group 103, and the other end is connected with one end of described current detection circuit 111; The other end of described current detection circuit 111 is connected with described governor circuit 109.
LED voltage increase and current constant source in the present embodiment achieves high-voltage direct-current and exports, and can reach 160Vdc, solves plurality of LEDs series connection, needs LED multi-path driving problems, reduce the production cost of circuit, solve the circuit design space problem that multiple drive circuit causes.This road drive circuit is equivalent to common voltage-dropping type 3 to 4 driving.And because the volume of product is little, can modularized design be carried out, and single drive circuit drives the implementation of plurality of LEDs also to possess higher efficiency (can reach more than 90%).
The output current in the LED voltage increase and current constant source in this programme can freely adjust, and is applicable to 1W, 3W lamp pearl and high voltage small area analysis (below 2A) LED module.
LED voltage increase and current constant source in this programme has the high-frequency fundamental oscillation (can reach 500KHZ) of the drive circuit of LED, and PWM light modulating frequency can reach 4KHZ, and fundamental oscillation frequency is unanimously good, and radiated interference easily controls.
Governor circuit 109 is before reception PWM dim signal, and light-coupled isolation switch 112 pairs of PWM dim signals carry out light-coupled isolation, makes PWM dim signal not by the interference of great power LED drive part in constant-current source; Dimming effect is more stable.
Short circuit current protection and current detection circuit 111 be arranged so that this programme has input high-low pressure defencive function, output voltage protection and short-circuit protection function.
The present embodiment additionally provides a kind of LED lamp, is provided with the LED voltage increase and current constant source described in above-mentioned any one.
In sum, by arranging governor circuit 109, DC-DC booster circuit 102, voltage detecting circuit 105, high-low pressure testing circuit 104, PWM dim signal is accessed by light-coupled isolation switch 112, the stabling current needed for LED/lamp group 103 is generated in the mode of boosting, reduce circuit production cost, save the design space needed for circuit.
Below know-why of the present utility model is described in conjunction with specific embodiments.These describe just in order to explain principle of the present utility model, and can not be interpreted as the restriction to the utility model protection range by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present utility model, and these modes all will fall within protection range of the present utility model.
Claims (5)
1. a LED voltage increase and current constant source, comprises LED/lamp group, it is characterized in that, also comprise: governor circuit, DC-DC booster circuit, voltage detecting circuit, high-low pressure testing circuit, DC-DC power source and light-coupled isolation switch; The input access PWM dim signal of described light-coupled isolation switch, the output of described light-coupled isolation switch is connected with the input of described governor circuit; Described DC-DC power source access external dc power input is also connected with described light-coupled isolation switch; The test side of described high-low pressure testing circuit is connected with the input of described external dc power, and the output of described high-low pressure testing circuit is connected with described governor circuit; The test side of described voltage detecting circuit is connected with described DC-DC booster circuit, and the output of described voltage detecting circuit is connected with described governor circuit, and the output of described governor circuit is connected with described DC-DC booster circuit; The input access external dc power input of described DC-DC booster circuit, the output of described DC-DC booster circuit is connected with LED/lamp group.
2. a kind of LED voltage increase and current constant source according to claim 1, it is characterized in that, also comprise temperature detect switch (TDS), described light-coupled isolation switch is connected by temperature detect switch (TDS) with described DC-DC power source.
3. a kind of LED voltage increase and current constant source according to claim 1, is characterized in that, also comprise short-circuit protection circuit, and one end of described short-circuit protection circuit is connected with described LED/lamp group, and the other end is connected with described governor circuit.
4. a kind of LED voltage increase and current constant source according to claim 1, it is characterized in that, also comprise constant-current drive circuit and current detection circuit, one end of described constant-current drive circuit is connected with described LED/lamp group, and the other end is connected with one end of described current detection circuit; The other end of described current detection circuit is connected with described governor circuit.
5. a LED lamp, is characterized in that, is provided with the LED voltage increase and current constant source described in Claims 1 to 4 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520113623.XU CN204425735U (en) | 2015-02-15 | 2015-02-15 | A kind of LED voltage increase and current constant source and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520113623.XU CN204425735U (en) | 2015-02-15 | 2015-02-15 | A kind of LED voltage increase and current constant source and LED lamp |
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| Publication Number | Publication Date |
|---|---|
| CN204425735U true CN204425735U (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520113623.XU Expired - Fee Related CN204425735U (en) | 2015-02-15 | 2015-02-15 | A kind of LED voltage increase and current constant source and LED lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106132014A (en) * | 2016-07-17 | 2016-11-16 | 安徽卓越电气有限公司 | A kind of intelligent LED explosion-proof lamp control system |
| CN107787606A (en) * | 2015-06-25 | 2018-03-09 | 飞利浦照明控股有限公司 | LED light device |
-
2015
- 2015-02-15 CN CN201520113623.XU patent/CN204425735U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107787606A (en) * | 2015-06-25 | 2018-03-09 | 飞利浦照明控股有限公司 | LED light device |
| CN107787606B (en) * | 2015-06-25 | 2020-05-15 | 飞利浦照明控股有限公司 | LED lighting device |
| CN106132014A (en) * | 2016-07-17 | 2016-11-16 | 安徽卓越电气有限公司 | A kind of intelligent LED explosion-proof lamp control system |
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| 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: 20150624 Termination date: 20210215 |
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| CF01 | Termination of patent right due to non-payment of annual fee |