摘要
利用PWM控制芯片普遍具有的VCC欠压关断功能,提出了短路/过流时降低VCC电压来保护LED电源的电路,设计了两种短路保护电路,成本低,可降低VCC电压或直接关断PWM控制芯片的PWM输出。
In general, PWM control chip is shut down in case of VCC undervoltage. According to this feature, the short-circuit or over current protection circuit in LED power supply has been proposed in this paper. By means of reducing VCC voltage or turning off the PWM output, the two Low-cost short-circuit protection circuits have been designed.
出处
《机电工程技术》
2013年第5期71-73,共3页
Mechanical & Electrical Engineering Technology
关键词
PWM控制芯片
LED电源
短路保护
电路
PWM control chip
LED power supply
short-circuit protection
circuit
