CN103813568A - 高效led恒流电源 - Google Patents

高效led恒流电源 Download PDF

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Publication number
CN103813568A
CN103813568A CN201210442445.6A CN201210442445A CN103813568A CN 103813568 A CN103813568 A CN 103813568A CN 201210442445 A CN201210442445 A CN 201210442445A CN 103813568 A CN103813568 A CN 103813568A
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China
Prior art keywords
power supply
current power
rectifier bridge
led constant
led
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CN201210442445.6A
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English (en)
Inventor
张雪
吴江
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Jiangsu Wenrun Optoelectronic Co Ltd
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Jiangsu Wenrun Optoelectronic Co Ltd
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Priority to CN201210442445.6A priority Critical patent/CN103813568A/zh
Publication of CN103813568A publication Critical patent/CN103813568A/zh
Pending legal-status Critical Current

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Abstract

本发明涉及一种LED驱动电源，驱动电源不使用电解电容能提供稳定的电压、电流来驱动LED串联和并联，避免了因电解电容的电解液慢泄露致使电源寿命短的问题。

Description

高效LED恒流电源
技术领域：本发明属于LED驱动电源领域 
背景技术：近几年LED发展逐渐取代过去的白炽灯时代，在不断更新中对于LED的应用及使用性能要求也有了相应的提高。LED灯珠在工作中需要工作在低电压直流状态下，为让市电提供稳定电流给LED灯珠正常工作，给LED光源提供的电流需经过整流。而经整流后的电路需要接入电解电容，利用其充放电特性，使整流后的脉动直流电压变成相对比较稳定的直流电压。在实际使用中整块电路电解电容寿命最为有限，(本身的电解液所能耐的温度最高是105℃)这也就限制了电源的寿命。 
发明内容：所解决的问题是去除常规电解电容，从而提高电源寿命，与LED工作寿命同步。本发明中采用了两个整流桥，第一个整流桥经过电容(需要耐压≥400V)移相提前一个角度，另一个整流桥采用环形电感电感迟后移相。因此整流出来的直流电路没有过零现象。 
附图说明
以下结合附图和实施例对本发明加以详细说明。 
图1是采用两个整流桥的正弦波形。 
图2是实施完成的实物图。 
具体实施方式
一种高效LED驱动电源，包括相连接的电源模块和LED驱动模块，直流电源模块包括交流输入与市电相连的两个整流桥，其中一个整流桥交流输入与市电连接有电感，正向直流输出与第二个整流桥直流正向输出相连并通过第一二极管与LED驱动模块相连。两个整流桥直 流负向连接与LED驱动模块相连。两个整流桥的正向直流输出连接有高频滤波电容。 
LED驱动模块端集成芯片PWM D引脚、VDD引脚、LD引脚与电容C3相连，Rosc引脚连接有200K电阻，使集成芯片在100KHz高纹波下正常工作。 
集成芯片的GATA引脚连接场效应管的栅极，GS引脚连接第二个电阻(此电阻的阻值可决定LED的工作电流。 

Claims (2)

1.交流转直流时，采用两个整流桥。其中一个提前移相，另一个迟后移相，两个不相位正弦波经整流后叠加，使整流出来的电路没有过零现象。
2.在第一个整流桥交流输入串联一个电容，第二个整流桥交流输入接有电感，随负载的功率改变电感值来提高功率因数。
CN201210442445.6A 2012-11-05 2012-11-05 高效led恒流电源 Pending CN103813568A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210442445.6A CN103813568A (zh) 2012-11-05 2012-11-05 高效led恒流电源

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210442445.6A CN103813568A (zh) 2012-11-05 2012-11-05 高效led恒流电源

Publications (1)

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CN103813568A true CN103813568A (zh) 2014-05-21

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CN201210442445.6A Pending CN103813568A (zh) 2012-11-05 2012-11-05 高效led恒流电源

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CN (1) CN103813568A (zh)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101841951A (zh) * 2010-01-12 2010-09-22 北京星网锐捷网络技术有限公司 Led驱动电路
US20100270942A1 (en) * 2009-04-24 2010-10-28 City University Of Hong Kong Apparatus and methods of operation of passive led lighting equipment
WO2012052728A1 (en) * 2010-10-23 2012-04-26 Technelec Ltd High efficiency led power supply
CN102438379A (zh) * 2012-01-06 2012-05-02 昆山市华英精密模具工业有限公司 Led驱动电源

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100270942A1 (en) * 2009-04-24 2010-10-28 City University Of Hong Kong Apparatus and methods of operation of passive led lighting equipment
CN101841951A (zh) * 2010-01-12 2010-09-22 北京星网锐捷网络技术有限公司 Led驱动电路
WO2012052728A1 (en) * 2010-10-23 2012-04-26 Technelec Ltd High efficiency led power supply
CN102438379A (zh) * 2012-01-06 2012-05-02 昆山市华英精密模具工业有限公司 Led驱动电源

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Application publication date: 20140521