电子科技
電子科技
전자과기
IT AGE
2011年
9期
42-44
,共3页
齐家%邓周虎%侯明月%齐文涛
齊傢%鄧週虎%侯明月%齊文濤
제가%산주호%후명월%제문도
LED%恒流驱动%开关电源
LED%恆流驅動%開關電源
LED%항류구동%개관전원
LED%constant-current driver%switching power supply
通过对LED电气特性分析,根据其工作特点设计了一种以HV9910B为核心的市电供电PWM工作模式高效白光LED驱动电路。通过理论计算和实验测量,确定了电路的工作频率,测试结果表明,该驱动电路工作电压范围宽、恒流输出,转换效率超过85%。
通過對LED電氣特性分析,根據其工作特點設計瞭一種以HV9910B為覈心的市電供電PWM工作模式高效白光LED驅動電路。通過理論計算和實驗測量,確定瞭電路的工作頻率,測試結果錶明,該驅動電路工作電壓範圍寬、恆流輸齣,轉換效率超過85%。
통과대LED전기특성분석,근거기공작특점설계료일충이HV9910B위핵심적시전공전PWM공작모식고효백광LED구동전로。통과이론계산화실험측량,학정료전로적공작빈솔,측시결과표명,해구동전로공작전압범위관、항류수출,전환효솔초과85%。
Through the analysis of the electrical characteristics of LED and its work characteristics,a high power efficiency PWM mode white LED driver circuit based on the HV9910B chip is designed,and the operating frequency of the circuit is determined through theoretical calculations and experimental measurements.Test results show that the driver circuit has a wide operating voltage range,constant current output,and a conversion efficiency of over 85%.
