摘要
由于输入端整流二极管的导通损耗,传统功率因数校正(PFC)变换器在输入电压较低时效率较低。针对此问题,这里研究了一种电流连续模式无桥隔离型谐振式发光二极管(LED)驱动器,消除了输入端的整流桥,提升了驱动器在低输入电压下的效率。通过引入谐振网络,该驱动电源可以在正负电压输入时均实现负载端的正极性电压输出,且各输出支路均流,适用于多路LED驱动应用;驱动电源采用平均电流模式控制,其电感电流工作在连续导通模式(CCM),输入电流的畸变率得到有效降低。同时,两个低导通损耗的金属-氧化物半导体场效应晶体管(MOSFET)采用由同一信号驱动的共源极连接方式,简化了控制电路。最后,通过140W的实验样机有效地验证了理论分析的正确性。
Duing to the conduction loss of rectifier diode at the input end,the traditional power factor correction(PFC)converter has low efficiency when the input voltage is low.Aiming at this problem,a current continuous mode bridgeless isolated resonant type light enitting diode(LED) driver is studied.The rectifier bridge at the input is eliminated,improving the efficiency of the driver at low input voltages.By introducing a resonant network,the driving power can achieve positive voltage output at the load end when both positive and negative voltages are input,and each output branch is current-sharing,which is suitable for multi-channel LED driving applications.The driving power adopts average current mode control,and its inductance the current works in continuous conduction mode(CCM),which effectively reduces the distortion rate of the input current.At the same time,two metal-oxide-semiconductor field-effect transistor(MOSFET) with low conduction loss are connected by a common source driven by the same signal,which simplifies the control circuit.Finally,the correctness of the theoretical analysis is effectively verified by the 140 W experimental prototype.
作者
张宇鑫
刘雪山
史旭
ZHANG Yu-xin;LIU Xue-shan;SHI Xu(Sichuan University,Chengdu 610065,China)
出处
《电力电子技术》
CSCD
北大核心
2022年第12期120-125,共6页
Power Electronics
基金
四川省区域创新合作资助项目(2021YFQ0006)。
关键词
驱动电源
功率因数校正
连续导通模式
谐振网络
driving power
power factor correction
continuous conduction mode
resonant network
