CN201893979U - High-power efficient constant-current light-emitting diode (LED) driver - Google Patents

High-power efficient constant-current light-emitting diode (LED) driver Download PDF

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Publication number
CN201893979U
CN201893979U CN2010206585016U CN201020658501U CN201893979U CN 201893979 U CN201893979 U CN 201893979U CN 2010206585016 U CN2010206585016 U CN 2010206585016U CN 201020658501 U CN201020658501 U CN 201020658501U CN 201893979 U CN201893979 U CN 201893979U
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CN
China
Prior art keywords
circuit
current sampling
cmos
led
current
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Expired - Fee Related
Application number
CN2010206585016U
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Chinese (zh)
Inventor
龚朝新
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XIAMEN METROTEC ELECTRONIC INDUSTRY Co Ltd
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XIAMEN METROTEC ELECTRONIC INDUSTRY Co Ltd
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Priority to CN2010206585016U priority Critical patent/CN201893979U/en
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Publication of CN201893979U publication Critical patent/CN201893979U/en
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Abstract

The utility model discloses a high-power efficient constant-current light-emitting diode (LED) driver, which is arranged between a utility power and an LED load, and comprises an electro-magnetic interference (EMI) bridge type rectification and filter circuit, a Boost power factor correction (Boost PFC) circuit, a voltage switching circuit, a complementary metal-oxide-semiconductor (CMOS) direct current (DC) output control circuit and a current sampling circuit, which are sequentially arranged and connected in series, wherein the input end of the EMI bridge type rectification and filter circuit is also connected with the utility power, and the output end of the current sampling circuit is connected with the LED load; the current sampling circuit is also connected with a constant current sampling feedback circuit, and the constant current sampling feedback circuit is fed back to the CMOS DC output control circuit through a CMOS/pulse-width modulation (PWM) controller; and the voltage switching circuit is also connected with a voltage feedback control circuit, and the voltage feedback control circuit is fed back to the Boost PFC circuit through a PWM/PFC controller. The LED driver provided by the utility model has the characteristics of high power, constant current and high efficiency at the same time, so the use quality of an LED light can be greatly ensured.

Description

A kind of large power high efficiency constant-current LED driver
Technical field
The utility model relates to the drive unit field, relates to a kind of large power high efficiency constant-current LED driver in particular.
Background technology
Along with the development of society, energy-saving and emission-reduction have become the common recognition of society.Good characteristics such as high brightness, long-life and low energy consumption make LED illumination receive much concern in recent years, and countries in the world have dropped into all that great amount of manpower and material resources are studied, development and utilization.
But, because it is consistent that the quality of the LED lamp of high brightness is difficult to reach, there are deviations such as voltage, electric current and power in it, therefore the stability of the driving power that matches with the LED lamp just can directly determine the service quality of LED lamp, has constant current, high power and high-efficiency LED driver simultaneously and can't find in the prior art.
In view of this, the inventor has this case to produce at the above-mentioned defective further investigation of existing led driver then.
The utility model content
The purpose of this utility model is to provide a kind of large power high efficiency constant-current LED driver, can't realize constant current, high power and high efficiency problem simultaneously with led driver in the solution prior art.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of large power high efficiency constant-current LED driver, be arranged between civil power and the LED load, wherein, comprise EMI bridge rectifier filter circuit, Boost pfc circuit, voltage conversion circuit, CMOS type DC output control circuit and current sampling circuit that series connection successively is provided with, also for linking to each other with civil power, this current sampling circuit output is then for linking to each other with the LED load for this EMI bridge rectifier filter circuit input; This current sampling circuit also is connected with the constant current sampling feedback circuit, and this constant current sampling feedback circuit then also feeds back to CMOS type DC output control circuit by a CMOS/PWM controller; This voltage conversion circuit also is connected with the Voltage Feedback control circuit, and this Voltage Feedback control circuit also feeds back to the Boost pfc circuit by a PWM/PFC controller.
Further, this CMOS/PWM controller has the PWM control unit and drives CMOS type DC output control circuit and regulate the constant current control unit of its output voltage electric current according to the work at present voltage and current signal of constant current sampling feedback circuit.
Further, this Boost pfc circuit is the boost type power factor correction circuit.
After adopting said structure, a kind of large power high efficiency constant-current LED driver that the utility model relates to, this Boost pfc circuit can be adjusted the phase difference between input current and the voltage, so can make that power factor improves greatly; Also be connected with constant current sampling feedback circuit and CMOS/PWM controller owing to this current sampling circuit simultaneously, it can play subtend LED load provides voltage or electric current to carry out the effect of feedback regulation, thereby makes the whole LED driving implement that the characteristic of constant current output be arranged; Owing to CMOS in the CMOS type DC output control circuit has realized the soft switch of Zero voltage transition, the wherein switching frequency of switching tube can be improved thus at last, the efficient of whole LED driver can be improved greatly.Thus, the led driver that the utility model relates to can have high power, constant current and characteristic efficiently simultaneously, so can guarantee the service quality of LED lamp greatly.
Description of drawings
The structured flowchart of a kind of large power high efficiency constant-current LED driver that Fig. 1 relates to for the utility model.
Among the figure:
Led driver 100
EMI bridge rectifier filter circuit 1 Boost pfc circuit 2
Voltage conversion circuit 3 CMOS type DC output control circuits 4
Current sampling circuit 5 constant current sampling feedback circuits 6
CMOS/PWM controller 7 PWM control units 71
Constant current control unit 72 Voltage Feedback control circuits 8
PWM/PFC controller 9
Civil power 200 LED loads 300.
Embodiment
In order further to explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.
As shown in Figure 1, a kind of large power high efficiency constant-current LED driver 100 that relates to for the utility model shown in it, it is arranged between civil power 200 and the LED load 300, guarantee that LED load 300(is specifically as follows the LED lamp thereby play) service quality, it comprises the EMI bridge rectifier filter circuit 1 that series connection successively is provided with, Boost pfc circuit 2, voltage conversion circuit 3, CMOS type DC output control circuit 4 and current sampling circuit 5, this EMI bridge rectifier filter circuit 1 input links to each other with civil power 200, this EMI bridge rectifier filter circuit 1 has the characteristics of the noise of high-voltage rectifying and inhibition electric network noise and self generation, and can improve antijamming capability and reliability; This Boost pfc circuit 2 is specially the boost type power factor correction circuit, and current sampling circuit 5 outputs then supply to link to each other with LED load 300, thereby supplies with for LED load 300 provides power supply; This current sampling circuit 5 also is connected with constant current sampling feedback circuit 6,6 of this constant current sampling feedback circuits also feed back to CMOS type DC output control circuit 4 by a CMOS/PWM controller 7, thereby can subtend LED load 300 provide voltage or electric current to carry out the effect of feedback regulation, thereby make whole LED driver 100 have the characteristic of constant current output; This voltage conversion circuit 3 also is connected with Voltage Feedback control circuit 8, and this Voltage Feedback control circuit 8 also feeds back to Boost pfc circuit 2 by a PWM/PFC controller 9, takes into account the effect of boosting with power factor correction thereby can play; This Boost pfc circuit 2 can be adjusted the phase difference between input current and the voltage, thereby can improve power factor, simultaneously because the setting of Voltage Feedback control circuit 8 and PWM/PFC controller 9, make and promptly also can play the effect that power factor (PF) is provided with Voltage Feedback to PWM/PFC controller 9.Owing to CMOS in the CMOS type DC output control circuit 4 has realized the soft switch of Zero voltage transition, the wherein switching frequency of switching tube can be improved thus in addition, the efficient of whole LED driver 100 can be improved greatly.In the present embodiment, constitute prime together by EMI bridge rectifier filter circuit 1, Boost pfc circuit 2 and PWM/PFC controller 9, and constitute the back level together by CMOS type DC output control circuit 4, current sampling circuit 5, constant current sampling feedback circuit 6, CMOS/PWM controller 7 and Voltage Feedback control circuit 8, and be built-in with CMOS in this Boost pfc circuit 2, this CMOS type DC output control circuit 4 also has CMOS, these two CMOS are used as switching device, thereby play the effect that improves power and efficient respectively.
Thus, the led driver 100 that the utility model relates to can have high power, constant current and characteristic efficiently simultaneously, so can guarantee the service quality of LED lamp greatly.
Concrete, have PWM control unit and constant current control unit in this CMOS/PWM controller 7, this constant current control unit is according to the work at present voltage and current signal of constant current sampling feedback circuit 6, drive CMOS type DC output control circuit 4 and regulate its output voltage electric current, thereby regulate the output voltage electric current, and then realize accurate adjustment LED load 300 operating voltages and electric current.
The foregoing description and graphic and non-limiting product form of the present utility model and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present utility model to its suitable variation or modification of doing.

Claims (3)

1. large power high efficiency constant-current LED driver, be arranged between civil power and the LED load, it is characterized in that, comprise EMI bridge rectifier filter circuit, Boost pfc circuit, voltage conversion circuit, CMOS type DC output control circuit and current sampling circuit that series connection successively is provided with, also for linking to each other with civil power, this current sampling circuit output is then for linking to each other with the LED load for this EMI bridge rectifier filter circuit input; This current sampling circuit also is connected with the constant current sampling feedback circuit, and this constant current sampling feedback circuit then also feeds back to CMOS type DC output control circuit by a CMOS/PWM controller; This voltage conversion circuit also is connected with the Voltage Feedback control circuit, and this Voltage Feedback control circuit also feeds back to the Boost pfc circuit by a PWM/PFC controller.
2. a kind of large power high efficiency constant-current LED driver as claimed in claim 1, it is characterized in that this CMOS/PWM controller has the PWM control unit and drives CMOS type DC output control circuit and regulate the constant current control unit of its output voltage electric current according to the work at present voltage and current signal of constant current sampling feedback circuit.
3. a kind of large power high efficiency constant-current LED driver as claimed in claim 1 is characterized in that this Boost pfc circuit is the boost type power factor correction circuit.
CN2010206585016U 2010-12-14 2010-12-14 High-power efficient constant-current light-emitting diode (LED) driver Expired - Fee Related CN201893979U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206585016U CN201893979U (en) 2010-12-14 2010-12-14 High-power efficient constant-current light-emitting diode (LED) driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206585016U CN201893979U (en) 2010-12-14 2010-12-14 High-power efficient constant-current light-emitting diode (LED) driver

Publications (1)

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CN201893979U true CN201893979U (en) 2011-07-06

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102905417A (en) * 2011-07-25 2013-01-30 全汉企业股份有限公司 Load driving device and method thereof
CN103576564A (en) * 2012-07-23 2014-02-12 珠海格力电器股份有限公司 Air conditioner, control circuit of air conditioner and control method of air conditioner
WO2018107779A1 (en) * 2016-12-15 2018-06-21 威创集团股份有限公司 Led driver circuit
CN114501729A (en) * 2022-03-04 2022-05-13 深圳市金永信科技有限公司 LED driving power circuit with high power and high alternating voltage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102905417A (en) * 2011-07-25 2013-01-30 全汉企业股份有限公司 Load driving device and method thereof
CN103576564A (en) * 2012-07-23 2014-02-12 珠海格力电器股份有限公司 Air conditioner, control circuit of air conditioner and control method of air conditioner
CN103576564B (en) * 2012-07-23 2016-04-13 珠海格力电器股份有限公司 Air conditioner and control circuit thereof and control method
WO2018107779A1 (en) * 2016-12-15 2018-06-21 威创集团股份有限公司 Led driver circuit
CN114501729A (en) * 2022-03-04 2022-05-13 深圳市金永信科技有限公司 LED driving power circuit with high power and high alternating voltage

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110706

Termination date: 20151214

EXPY Termination of patent right or utility model