摘要：在这个电路中，数字电位器（ DS1869 ）有助于提供手动控制LED亮度的LED驱动IC （ MAX16800 ） 。该电路还提供了对过热和过载条件下的热保护。Maxim > App Notes > Digital Potentiometers Display Drivers Keywords: LED drivers, linear brightness controllers, digital potentiometers Jan 10, 2011 APPLICATION NOTE 4561 Linear Brightness Controller for LEDs Has 64 Taps By: Ahmad Ayar Abstract: In this circuit, a digital potentiometer (DS1869) aids an LED-driver IC (MAX16800) in providing manual control of the LED brightness. The circuit also provides thermal protection against excessive heat and overload conditions. A similar version of this article appeared in the March 15, 2007 issue of EDN magazine. Applications that include LEDs but no microcontroller (or other form of control intelligence) can benefit from a simple circuit that provides manual control of the LED's light intensity. Amon……