STLED25

STLED25 5 channels step-up white LED driver Datasheet − production data Features ■ Operating input voltage range from 2.3 V to 5.5 V ■ ± 7.5% LED current accuracy ■ Two LEDs in series per channel ■ High side current source ■ Up to 125 mA of total LED current ■ 86% efficiency at 100 mA ■ PWM dimming with automatic shutdown time window ■ 2.5 MHz switching frequency ■ CSP 12 bumps 0.4 mm. pitch 1.4 x 1.8 mm. Applications ■ LCD backlight with up to 10 LEDs ■ Cellular phones ■ PDAs Description Flip-Chip 12 bumps (1.4 x 1.8 mm.) continue operating driver channels that are functioning normally, while avoiding excessive power consumption or associated thermal issues. The control technique is able to maintain the efficiency close to 87% at medium load and higher than 85% at light or full load. The device also includes soft-start control, inrush current limit, thermal shutdown and inductor peak current limit. The STLED25 is packaged in a 12-bump CSP (1.4 x 1.8 mm,...