摘要：电流控制电路在低电压的LED系统的修改，允许使用的一个切碎供应电压调节LED亮度。该电路防止浪涌电流期间关闭的时间间隔，当电源电压关闭的LED去耦电容。Maxim > App Notes > Display Drivers LED Lighting Optoelectronics
Keywords: LEDs, LED drivers, LED current regulators, chopped supply voltage, inrush current, decoupling capacitors Mar 09, 2011
APPLICATION NOTE 4977
Simple Detection Circuit Lowers Stress on LED Driver with Power-
Line Dimming
By: Fons Janssen
Abstract: A modification of the current-control circuit in a low-voltage LED system allows use of a chopped supply voltage to
modulate the LED intensity. The circuit prevents inrush current to the decoupling capacitors by turning off the LEDs during
intervals when the supply voltage is off.
A similar version of this article appeared in the September 23, 2010 issue of Electronic Design magazine.
In low-voltage (24V) lighting systems, the off-line power supplies can often be l……
