White LED driver simplifies large display design for portable electronics
( 01 May 2008 )
The AAT1239-1 is a high frequency, high efficiency constant current boost converter capable of driving up to10 white LEDs (WLEDs) connected in series. Designed for backlight applications in PNDs, eDictionaries, electronic photo frames and cellular handsets, it uses the company’s proprietary Simple Serial Control (S2CWire) single-wire interface to reduce the display flicker that occurs with commonly-used low frequency PWM control schemes. Operating off a 2.7 to 5.5V input range, it delivers a maximum continuous output of 40V at 30mA, and a constant LED current for up to 10 WLEDs in series.
