CN103379690A - LED light driving power - Google Patents

LED light driving power Download PDF

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Publication number
CN103379690A
CN103379690A CN 201210105541 CN201210105541A CN103379690A CN 103379690 A CN103379690 A CN 103379690A CN 201210105541 CN201210105541 CN 201210105541 CN 201210105541 A CN201210105541 A CN 201210105541A CN 103379690 A CN103379690 A CN 103379690A
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CN
China
Prior art keywords
connects
diode
module
driving power
electric capacity
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Pending
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CN 201210105541
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Chinese (zh)
Inventor
向培
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YICHANG LANBEN TECHNOLOGY DEVELOPMENT Co Ltd
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YICHANG LANBEN TECHNOLOGY DEVELOPMENT Co Ltd
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Priority to CN 201210105541 priority Critical patent/CN103379690A/en
Publication of CN103379690A publication Critical patent/CN103379690A/en
Pending legal-status Critical Current

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Abstract

An LED light driving power comprises an AC power input terminal, a rectification module, a control circuit module and an output module. The AC power input terminal is connected with the rectification module; the rectification module is connected with the control circuit module; the control circuit module is connected with the output module; the rectification module is connected with a valley-filled PFC circuit module; the valley-filled PFC circuit module is connected with the control circuit module; and the control circuit module is connected with the output module. A PWM/ PFM technique is utilized in the LED light driving power, so that the LED light driving power has the advantages of high power factor, little electromagnetic interference and high efficiency.

Description

The LED lamp driving power source
Technical field
The present invention relates to a kind of driving power, be used for the driving LED light fixture.
Background technology
At present, what use the most employing of more ceiling light driver on the market is that electric capacity is fallen driving, and this type of circuit design its light when peripheral voltage changes also can change, and the circuit protection that there is no need, and stability is relatively relatively poor.When this driving power of excessive use under same supply transformer, because electric capacity increases, cause the power factor of electric power system leading, stability is inadequate.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of LED lamp driving power source, be a kind of non-isolation constant-current driving power supply module for the driving LED light fixture, this power supply module has adopted the PWM/PFM technology, has power factor (PF) height, electromagnetic interference is few, efficient is high characteristics.
Above-mentioned purpose of the present invention is to realize by such technical scheme: the LED lamp driving power source, comprise the AC power supplies input, rectification module, control circuit module, output module, the AC power supplies input connects rectification module, rectification module connects the control circuit module, and the control circuit module connects output module, and described rectification module connects valley fill type PFC circuit module, valley fill type PFC circuit module connects the control circuit module, and the control circuit module connects output module.
Described AC power supplies input connects protective circuit, and protective circuit connects anti-interference inhibition circuit, and anti-interference inhibition circuit connects rectification module.
Described protective circuit by: insurance F1, piezo-resistance ZVR and thermistor NTC are in series.
Described anti-interference inhibition circuit by: safety capacitor C X1 and the first inductance L 1 are formed by connecting.
Described valley fill type PFC circuit module by: the first capacitor C 1, the second capacitor C 2, the first diode D1, the second diode D2, the 3rd diode D3 connect to form, it is anodal that described the first capacitor C 1 one ends connect the first diode D1, the first diode D1 negative pole connects the second capacitor C 2 one ends, it is anodal that the second capacitor C 2 other ends connect the second diode D2, it is anodal that the second diode D2 negative pole connects the first diode D1, it is anodal that the first diode D1 negative pole connects the 3rd diode D3, and the 3rd diode D3 negative pole connects the first capacitor C 1 other end.
Described control circuit module comprises integrated control IC, and this integrated control IC one pin connects the 3rd resistance R 3, and described the 3rd resistance R 3 is used for the operating frequency of control integration control IC.
Described output module comprises field effect transistor Q1, and described field effect transistor Q1 drain electrode connects the second inductance L 2, the second inductance L 2 connections the 5th capacitor C 5, the five capacitor C 5 two ends and is respectively the DC output.
It is anodal that described the second inductance L 2 connects fast recovery diode D3, and fast recovery diode D3 negative pole connects, the 5th capacitor C 5 one ends.
The beneficial effect of a kind of LED lamp driving power source of the present invention is as follows:
1), high precision constant current, low noise guarantees that the LED light efficiency is high, light decay is little.
2), possess open circuit, short circuit, overload protection function, safety, stable.
3), advanced PWM/PFM control technology, the EMC performance is better.
4), energy-saving and environmental protection, meet the safety standard.
5), strict burn-in test, be fit to various abominable operational environments.
6), volume is little, compact conformation, assembling is simple, install easily, can directly be installed in LED ceiling light, the shot-light.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is power circuit diagram of the present invention.
Embodiment
As shown in Figure 1, the LED lamp driving power source comprises the AC power supplies input, rectification module 1, control circuit module 2, output module 3, the AC power supplies input connects rectification module 1, and rectification module 1 connects control circuit module 2, control circuit module 2 connects output module 3, described rectification module 1 connects valley fill type PFC circuit module 4, and valley fill type PFC circuit module 4 connects control circuit module 2, and control circuit module 2 connects output module 3.Described AC power supplies input connects protective circuit 5, and protective circuit 5 connects anti-interference inhibition circuit 6, and anti-interference inhibition circuit 6 connects rectification module 1.
Described protective circuit 5 by: insurance F1, piezo-resistance ZVR and thermistor NTC are in series.
Described anti-interference inhibition circuit 6 by: safety capacitor C X1 and the first inductance L 1 are formed by connecting.
Described valley fill type PFC circuit module 4 by: the first capacitor C 1, the second capacitor C 2, the first diode D1, the second diode D2, the 3rd diode D3 connect to form, it is anodal that described the first capacitor C 1 one ends connect the first diode D1, the first diode D1 negative pole connects the second capacitor C 2 one ends, it is anodal that the second capacitor C 2 other ends connect the second diode D2, it is anodal that the second diode D2 negative pole connects the first diode D1, it is anodal that the first diode D1 negative pole connects the 3rd diode D3, and the 3rd diode D3 negative pole connects the first capacitor C 1 other end.
Described control circuit module 2 comprises integrated control IC, and this integrated control IC one pin connects the 3rd resistance R 3, and described the 3rd resistance R 3 is used for the operating frequency of control integration control IC.Integrated control IC adopts IC D802.
Described output module 3 comprises field effect transistor Q1, and described field effect transistor Q1 drain electrode connects the second inductance L 2, the second inductance L 2 connections the 5th capacitor C 5, the five capacitor C 5 two ends and is respectively the DC output.Described field effect transistor Q1 source electrode connects the part in parallel of the 5th resistance R 5 and the 6th resistance R 6, and the 5th resistance R 5, the 6th resistance R 6 are used for metering function.Described field effect transistor Q1 grid connects the pin of integrated control IC.
It is anodal that described the second inductance L 2 connects fast recovery diode D3, and fast recovery diode D3 negative pole connects, the 5th capacitor C 5 one ends.
The course of work:
AC power supplies input input 220V/50HZ alternating-current power supply, by insurance F1, thermistor NTC makes when suddenly rising of power supply or switch, can not damage because of large electric current the LED lamp of back.Piezo-resistance ZVR shields circuit when overvoltage.
Safety capacitor C X1, the first inductance L 1 plays transition and disturbs inhibitory action in circuit.
AC power is by rectifier bridge BD1, and rectification is pulse voltage, forms valley fill type PFC circuit module 4 by the first capacitor C 1, the second capacitor C 2, the first diode D1, the second diode D2, the 3rd diode D3.Begin during input voltage 310V to descend, the first diode D1, the second diode D2, the 3rd diode D3 are anti-phase cut-off, and input voltage does not charge, do not discharge yet the 3rd capacitor C 3, the 4th capacitor C 4.Input voltage is directly powered to back-end circuit.Behind about 3ms, input voltage is reduced to 155V, the second diode D2, the equal forward conduction of the 3rd diode D3, and the 3rd capacitor C 3, the 4th capacitor C 4 are in parallel, and to the back-end power supply of beginning.Because the about 14W of rear end power, the 3rd capacitor C 3, the 4th capacitor C 4 can not keep fully, and Vdc can be reduced to 140V by 155V, and input voltage is reduced to 0V, and are being raised to 140V, about 3ms of time.
When input voltage was raised to 140V, the first diode D1, the second diode D2, the equal reverse bias of the 3rd diode D3, input voltage to the 3rd capacitor C 3,4 chargings of the 4th capacitor C, did not discharge yet; Behind 3 ms, input voltage reaches 280V, this moment, the first diode D1 became reverse-conducting, the second diode D2, the 3rd diode D3 still are reverse bias, therefore, the 3rd capacitor C 3, the 4th capacitor C 4 are series connection at this moment, and input voltage is simultaneously along these two capacitor chargings, and provide electric current, about 1 ms of time to back-end circuit.
Filtered direct current is leaded up to the second resistance R 2, voltage stabilizing didoe ZD1 provides power supply to integrated control IC, the LED lamp of back is supplied with on another road, the second capacitor C 2 plays the effect that leaches high frequency, frequently come the operating frequency of control integration control IC by the 3rd resistance R 3 limits, the 5th resistance R 5,6 metering functions of the 6th resistance R, Q1 controls by IC control field effect transistor, feed back by the 4th resistance R 4 power supplys, the second inductance L 2, the 5th capacitor C 5 being on the scene effect pipe Q1 play the energy storage effect when closing, and make the LED lamp keep constant DC power supply, guarantee LED lamp efficient stable.
Design parameter:
Input voltage (V): 90Vac-265Vac;
Input rated frequency: 50Hz/60Hz;
Conversion efficiency: ﹥ 90%;
Power factor correction value (%): ﹥ 0.92;
Harmonic value: ﹤ 15%;
Constant-current error (%): ﹤ ± 3%;
Product size (mm): 80mm * 34mm * 20mm;
Mounting means: built-in/external;
Power output 1-28W;
Output current<1A.

Claims (8)

1.LED lamp driving power source, comprise the AC power supplies input, rectification module (1), control circuit module (2), output module (3), the AC power supplies input connects rectification module (1), rectification module (1) connects control circuit module (2), control circuit module (2) connects output module (3), it is characterized in that, described rectification module (1) connects valley fill type PFC circuit module (4), and valley fill type PFC circuit module (4) connects control circuit module (2), and control circuit module (2) connects output module (3).
2. described LED lamp driving power source according to claim 1 is characterized in that, described AC power supplies input connects protective circuit (5), and protective circuit (5) connects anti-interference inhibition circuit (6), and anti-interference inhibition circuit (6) connects rectification module (1).
3. described LED lamp driving power source according to claim 2 is characterized in that, described protective circuit (5) by: insurance (F1), piezo-resistance (ZVR) and thermistor (NTC) are in series.
4. described LED lamp driving power source according to claim 2 is characterized in that, described anti-interference inhibition circuit (6) by: safety electric capacity (CX1) is formed by connecting with the first inductance (L1).
5. described LED lamp driving power source according to claim 1, it is characterized in that, described valley fill type PFC circuit module (4) is by the first electric capacity (C1), the second electric capacity (C2), the first diode (D1), the second diode (D2), the 3rd diode (D3) connects to form, described the first electric capacity (C1) end connects the first diode (D1) positive pole, the first diode (D1) negative pole connects the second electric capacity (C2) end, the second electric capacity (C2) other end connects the second diode (D2) positive pole, the second diode (D2) negative pole connects the first diode (D1) positive pole, the first diode (D1) negative pole connects the 3rd diode (D3) positive pole, and the 3rd diode (D3) negative pole connects the first electric capacity (C1) other end.
6. described LED lamp driving power source according to claim 1, it is characterized in that, described control circuit module (2) comprises integrated control IC, and this integrated control IC one pin connects the 3rd resistance (R3), and described the 3rd resistance (R3) is used for the operating frequency of control integration control IC.
7. described LED lamp driving power source according to claim 1, it is characterized in that, described output module (3) comprises field effect transistor (Q1), described field effect transistor (Q1) drain electrode connects the second inductance (L2), the second inductance (L2) connects the 5th electric capacity (C5), and the 5th electric capacity (C5) two ends are respectively the DC output.
8. described LED lamp driving power source according to claim 7 is characterized in that, described the second inductance (L2) connects fast recovery diode (D3) positive pole, and fast recovery diode (D3) negative pole connects the 5th electric capacity (C5) end.
CN 201210105541 2012-04-12 2012-04-12 LED light driving power Pending CN103379690A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201210105541 CN103379690A (en) 2012-04-12 2012-04-12 LED light driving power

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201210105541 CN103379690A (en) 2012-04-12 2012-04-12 LED light driving power

Publications (1)

Publication Number Publication Date
CN103379690A true CN103379690A (en) 2013-10-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104880662A (en) * 2015-05-26 2015-09-02 徐新权 LED driving power supply circuit board with test apparatus
CN107396490A (en) * 2017-07-12 2017-11-24 无锡迅驰电子科技有限公司 High PF is minimized without stroboscopic non-jitter power supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104880662A (en) * 2015-05-26 2015-09-02 徐新权 LED driving power supply circuit board with test apparatus
CN107396490A (en) * 2017-07-12 2017-11-24 无锡迅驰电子科技有限公司 High PF is minimized without stroboscopic non-jitter power supply

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Application publication date: 20131030