CN204350406U - A kind of isolation drive power supply of LED illumination lamp - Google Patents
A kind of isolation drive power supply of LED illumination lamp Download PDFInfo
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- CN204350406U CN204350406U CN201520060756.5U CN201520060756U CN204350406U CN 204350406 U CN204350406 U CN 204350406U CN 201520060756 U CN201520060756 U CN 201520060756U CN 204350406 U CN204350406 U CN 204350406U
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Abstract
A kind of LED illumination lamp isolation drive of the utility model power supply, 220V civil power is through current rectifying and wave filtering circuit access current constant control integrated circuit, current constant control integrated circuit exports high voltage direct current via pulse width modulation access isolating transformer, voltage feedback signal is accessed current constant control integrated circuit by output voltage feedback circuit, and closed loop feedback exports constant current.Also be furnished with line voltage sampling circuit, loop compensation circuit.Isolating transformer through chip power circuit, for PFC goes stroboscopic chip to provide electric current and voltage.PFC goes stroboscopic chip to be furnished with the restriction of LED current testing circuit, LED current ripple detection circuit, LED current ripple control circuit and LED electrical pressure and short-circuit protection circuit, effectively to remove the ripple in electric current, and protection LED.The utility model current constant control integrated circuit coordinates PFC to remove stroboscopic chip, ensures the constant current being supplied to LED ripple-free, eliminates the stroboscopic of LED, is conducive to the vision health protecting user.
Description
Technical field
The utility model relates to field of illumination lamp technology, is specially a kind of LED illumination lamp isolation drive power supply of output current ripple-free.
Background technology
The principle of luminosity of LED is that alternating current is transformed into direct current and powers to light-emitting diode by driving power, makes it luminous.LED has that the life-span is long, energy consumption is low, color rendering is high and the advantage such as shock resistance is good, is called as green illumination light source, is used widely.Incandescent lamp is eliminated in many places, vigorously promotes the use LED green illumination.But LED has stroboscopic more, the insulating power supply especially when using the Width funtion of 85V ~ 265V, stroboscopic is more serious.Study or work under this illuminating lamp, stroboscopic can injure eyesight, is engaged in dangerous work and easily causes erroneous judgement, security incident occurs under the light fixture having stroboscopic.
Each light fixture production firm is also being devoted to the stroboscopic problem solving LED in recent years, the most frequently used is the capacity strengthening output circuit electric capacity, when in LED drive power, electric capacity is increased to certain value, output current ripple can drop to 5%, thus greatly reduces the stroboscopic of LED.But the insulating power supply under the Width funtion of 85V ~ 265V, is difficult to after adding bulky capacitor ensure constant output current, not only cannot controls stroboscopic further, also directly affect luminous flux and the colour temperature of LED.
Utility model content
The purpose of this utility model is a kind of LED illumination lamp isolation drive power supply of design, and it comprises stroboscopic integrated circuit (IC) chip, also has current constant control chip.Can ensure the constant current accuracy outputting to LED electric current under the Width funtion of 85V ~ 265V, and current ripples drops to 0.Thus the effect realized without stroboscopic, be conducive to the vision health protecting user.
A kind of LED illumination lamp isolation drive power supply of the utility model design, 220V electric main is its power supply, comprises PFC and removes stroboscopic chip and isolating transformer, also comprise current constant control integrated circuit.220V electric main is through current rectifying and wave filtering circuit, become high voltage direct current, access pulse-width modulation circuit, a signal output part of current constant control integrated circuit connects pulse-width modulation circuit, high voltage direct current is modulated to high-voltage square-wave by the pulse-width modulation circuit that current constant control integrated circuit controls, it exports and connects isolating transformer primary coil N1, one tunnel of isolating transformer secondary coil N2 output connects voltage feedback circuit, output voltage feedback signal is accessed a signal input part of current constant control integrated circuit by voltage feedback circuit, current constant control integrated circuit carries out closed loop feedback according to feedback signal, the pulse duration of adjusting pulsewidth modulation circuit, make its output voltage within the specific limits.Another road of isolating transformer secondary coil N2 output connects current constant control integrated circuit through IC power supply circuits, is its power supply simultaneously.
This isolation drive power supply is furnished with lightning surge protection circuit, 220V electric main is through lightning surge protection circuit access current rectifying and wave filtering circuit, when supply network is because of thunderbolt generation transient overvoltage or surge generation instantaneous overcurrent, this circuit over-voltage and surge current of releasing.
This isolation drive power supply is furnished with the output that line voltage sampling circuit connects current rectifying and wave filtering circuit, to the high voltage direct streamline voltage sample that current rectifying and wave filtering circuit exports, another signal input part of the sampled signal access current constant control integrated circuit of line voltage sampling circuit, makes it to control electric power output voltage better.
The current constant control integrated circuit linkloop compensating circuit of this isolation drive power supply, loop compensation circuit output connects current sampling circuit, another signal input part of the feedback signal access current constant control integrated circuit of current sampling circuit, another signal output part linkloop compensating circuit of current constant control integrated circuit, controls this circuit and compensates output loop.
The high-voltage square-wave step-down obtained by pulse-width modulation circuit is that LED is suitable for voltage by isolating transformer, and this voltage is from the output of isolating transformer secondary coil N3, through filter circuit access chip power circuit, for PFC removes stroboscopic chip power supply.
LED current testing circuit is connected to the current output terminal of stroboscopic chip, detects the output current value removing stroboscopic chip, and the output access PFC of LED current testing circuit removes a signal input part of stroboscopic chip; LED current ripple detection circuit connects the current output terminal removing stroboscopic chip, detects the ripple removing stroboscopic chip output current, and the output access PFC of LED current ripple detection circuit removes another signal input part of stroboscopic chip; PFC goes a signal output part of stroboscopic chip to connect LED current ripple control circuit, and LED current ripple control circuit connects the current output terminal removing stroboscopic chip.The ripple value that PFC goes stroboscopic chip to feed back according to LED current ripple detection circuit, instruction LED current ripple control circuit, removes the ripple in output current.
Meanwhile, the restriction of LED electrical pressure and short-circuit protection circuit connect the current output terminal removing stroboscopic chip, and another signal input part of stroboscopic chip is removed in the output access of the restriction of LED electrical pressure and short-circuit protection circuit.PFC goes stroboscopic chip by this protective circuit, provides protection to LED and this power supply.
Compared with prior art, the advantage of a kind of LED illumination lamp isolation drive of the utility model power supply is: 1, stroboscopic chip is removed in the cooperation of current constant control integrated circuit, ensure the constant current that ripple-free is provided to LED, thus realize LED without strobe effect, be conducive to the vision health of protection user; 2, current constant control integrated circuit adopts pulse-width modulation circuit to control constant current, and efficiency reaches 80% ~ 90%, and reliability is high; 3, be furnished with lightning surge protection circuit, be also furnished with the restriction of LED electrical pressure and short-circuit protection circuit, duplicate protection, ensure that the LED's that Surge handling capability is poor is safe, not damaged; 4, current constant control integrated circuit is furnished with the peripheral circuits such as loop compensation circuit, line voltage sampling circuit, output voltage feedback circuit, to ensure the current constant that current constant control integrated circuit exports.
Accompanying drawing explanation
Fig. 1 is this LED illumination lamp isolation drive power supply embodiment circuit block diagram.
Embodiment
This LED illumination lamp isolation drive power supply embodiment as shown in Figure 1, 220V electric main is through lightning surge protection circuit access current rectifying and wave filtering circuit, the output access pulse-width modulation circuit of current rectifying and wave filtering circuit, a signal output part of current constant control integrated circuit connects pulse-width modulation circuit, high voltage direct current is modulated to high-voltage square-wave by the pulse-width modulation circuit that current constant control integrated circuit controls, access isolating transformer primary coil N1, one tunnel of the output of isolating transformer secondary coil N2 connects voltage feedback circuit, a signal input part of the output access current constant control integrated circuit of voltage feedback circuit, another road of output of isolating transformer secondary coil N2 connects current constant control integrated circuit through IC power supply circuits.
Line voltage sampling circuit connects the output of current rectifying and wave filtering circuit, to the high voltage direct streamline voltage sample that current rectifying and wave filtering circuit exports, another signal input part of the sampled signal access current constant control integrated circuit of line voltage sampling circuit.
Loop compensation circuit output connects current sampling circuit, another signal input part of the sampled signal access current constant control integrated circuit of current sampling circuit, another signal output part linkloop compensating circuit of current constant control integrated circuit.
The output of isolating transformer secondary coil N3 removes stroboscopic chip power circuit through filter circuit access PFC, is its power supply.
LED current testing circuit is connected to the current output terminal of stroboscopic chip, and the output access PFC of LED current testing circuit removes a signal input part of stroboscopic chip; LED current ripple detection circuit connects the current output terminal removing stroboscopic chip, and the output access PFC of LED current ripple detection circuit removes another signal input part of stroboscopic chip; PFC goes a signal output part of stroboscopic chip to connect LED current ripple control circuit, and LED current ripple control circuit connects the current output terminal removing stroboscopic chip.
The described stroboscopic chip that goes also connects the restriction of LED electrical pressure and short-circuit protection circuit, and the restriction of LED electrical pressure and short-circuit protection circuit connect LED circuit.
The restriction of LED electrical pressure and short-circuit protection circuit connect the current output terminal removing stroboscopic chip, and the output access PFC of the restriction of LED electrical pressure and short-circuit protection circuit removes another signal input part of stroboscopic chip.
Above-described embodiment, be only the specific case further described the purpose of this utility model, technical scheme and beneficial effect, the utility model is not defined in this.All make within scope of disclosure of the present utility model any amendment, equivalent replacement, improvement etc., be all included within protection range of the present utility model.
Claims (5)
1. a LED illumination lamp isolation drive power supply, 220V electric main is its power supply, comprises PFC and removes stroboscopic chip and isolating transformer, it is characterized in that:
Also comprise current constant control integrated circuit; 220V electric main accesses pulse-width modulation circuit through current rectifying and wave filtering circuit, a signal output part of current constant control integrated circuit connects pulse-width modulation circuit, the pulse-width modulation circuit that current constant control integrated circuit controls connects isolating transformer primary coil N1, one tunnel of isolating transformer secondary coil N2 output connects voltage feedback circuit, a signal input part of voltage feedback circuit access current constant control integrated circuit; Another road of isolating transformer secondary coil N2 output connects current constant control integrated circuit through IC power supply circuits;
The output of isolating transformer secondary coil N3 is through filter circuit access chip power circuit;
LED current testing circuit is connected to the current output terminal of stroboscopic chip, and the output access PFC of LED current testing circuit removes a signal input part of stroboscopic chip; LED current ripple detection circuit connects the current output terminal removing stroboscopic chip, and the output access PFC of LED current ripple detection circuit removes another signal input part of stroboscopic chip; PFC goes a signal output part of stroboscopic chip to connect LED current ripple control circuit, and LED current ripple control circuit connects the current output terminal removing stroboscopic chip.
2. LED illumination lamp isolation drive power supply according to claim 1, is characterized in that:
Described 220V electric main is through lightning surge protection circuit access current rectifying and wave filtering circuit.
3. LED illumination lamp isolation drive power supply according to claim 1, is characterized in that:
Line voltage sampling circuit connects the output of current rectifying and wave filtering circuit, and the output of line voltage sampling circuit accesses another signal input part of described current constant control integrated circuit.
4. LED illumination lamp isolation drive power supply according to claim 1, is characterized in that:
Loop compensation circuit output connects current sampling circuit, and the output of current sampling circuit accesses another signal input part of described current constant control integrated circuit, another signal output part linkloop compensating circuit of described current constant control integrated circuit.
5. LED illumination lamp isolation drive power supply according to claim 1, is characterized in that:
Described PFC goes stroboscopic chip also to connect the restriction of LED electrical pressure and short-circuit protection circuit; the restriction of LED electrical pressure and short-circuit protection circuit connect the current output terminal that PFC removes stroboscopic chip, and another signal input part of stroboscopic chip is removed in the output access of the restriction of LED electrical pressure and short-circuit protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520060756.5U CN204350406U (en) | 2015-01-28 | 2015-01-28 | A kind of isolation drive power supply of LED illumination lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520060756.5U CN204350406U (en) | 2015-01-28 | 2015-01-28 | A kind of isolation drive power supply of LED illumination lamp |
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| Publication Number | Publication Date |
|---|---|
| CN204350406U true CN204350406U (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520060756.5U Withdrawn - After Issue CN204350406U (en) | 2015-01-28 | 2015-01-28 | A kind of isolation drive power supply of LED illumination lamp |
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| Country | Link |
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| CN (1) | CN204350406U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104540308A (en) * | 2015-01-28 | 2015-04-22 | 广西盛和电子科技股份有限公司 | Isolated drive power supply for LED lighting lamp |
-
2015
- 2015-01-28 CN CN201520060756.5U patent/CN204350406U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104540308A (en) * | 2015-01-28 | 2015-04-22 | 广西盛和电子科技股份有限公司 | Isolated drive power supply for LED lighting lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151110 Address after: 535000, A219, 1 Ma Ma Avenue, Qinzhou Industrial Park, Qinzhou, the Guangxi Zhuang Autonomous Region Patentee after: Guangxi Qinzhou Hao Yitong Photoelectric Technology Co. Ltd. Address before: 535000 Shuguang garden, hi tech Industrial Development Zone, the Guangxi Zhuang Autonomous Region, Qinzhou Patentee before: GUANGXI SHENGHE ELECTRONIC TECHNOLOGY CO., LTD. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150520 Effective date of abandoning: 20170811 |
|
| AV01 | Patent right actively abandoned |