摘要
针对目前采用临界导通模式(Boundary Conduction Mode,BCM)的发光二极管(Light Emitting Diode,LED)驱动电路,介绍了临界导通模式中过零检测的原理,并且针对传统技术中采用源极驱动结构实现过零检测的缺点,提出了一种基于功率MOS管栅极过零检测方式,在实现过零检测功能的基础上,优化了LED驱动控制电路的线路结构,减小了芯片面积,提高了电路的竞争力。
The principle of zero-crossing detect in the boundary conduction mode(BCM)in light emitting diode(LED)drive circuit is introduced.Aiming at the shortcoming of the traditional method using source-driven,a zero-crossing detection method based on power MOS gate is proposed.Based on the function of zero-crossing detection,the new method can optimize the circuit structure,reduce the chip area,and improve the competitiveness of the circuit.
作者
朱晓杰
王栋
ZHU Xiaojie;WANG Dong(Hangzhou Silan Microelectronics Co.,Ltd.,Hangzhou 310012,China)
出处
《电子与封装》
2022年第3期69-73,共5页
Electronics & Packaging
关键词
LED驱动
临界导通
过零检测
栅极驱动
栅极过零检测
LED driver
boundary conduction
zero-crossing detect
gate-driven
gate zero-crossing detect
