摘要： PDA，手机，数码相机，以及其他便携式设备中常见的WLED背光。本应用笔记介绍了一种开关模式升压设计，其中显示器背光长时间。其转换效率，在有限的电阻和线性调节的设计提供了一个省电的优点。Maxim > Design support > App notes > Display Drivers > APP 1871 Keywords: LED, backlight, keypad, display, switch mode Feb 03, 2003 APPLICATION NOTE 1871 Single FET Controls 2nd LED Array in Switch-Mode LED Backlight By: Len Sherman Abstract: WLED backlights are common in PDAs, cell phones, digital cameras, and other portable devices. This application note describes a switch-mode boost design in which the display is backlit for extended periods of time. Its conversion efficiency provides a power-saving advantage over resistor-limited and linearly regulated designs. A similar version of this article appeared in the April 12, 2001 issue of EDN magazine. White-LED b……