器件名称:
ST1208
功能描述:
3-Channel White LED Driver
文件大小:
254.08KB 共12页
简 介:
ST Sitronix ! Features " " " " " " " " " " High Efficiency Operation ( PLEDs / PBATT ) -- Extends battery life -- Peak efficiency over 88 % 1 / 1.5x Fractional Charge Pump Circuits -- extends voltage operate range Range of LED Driver Power -- 2.7 to 5.0V Drivability 30 mA/LED with Li-Ion Battery Operating Range Shutdown Mode Draws Less Than 1 uA Regulated to ± 3 % Output Current Matching Soft-Start Function To Limit Inrush Current Dimming Control by Logic or PWM No external Schottky Diode and Inductor Required Low Input Ripple and EMI " " " ST1208 3-Channel White LED Driver Short Circuit and Over-Temperature Protection 2KV ESD Rating Thin QFN ( 4 mm X 4 mm ), Small TSSOP-16L Packages and Bare Chip ! Ordering Information Ordering No. ST1208-Q ST1208-T ST1208-B Package QFN-16 TSSOP-16L Bare Chip ! Description The ST1208 is a versatile change pump designed for use in battery operated power supply application. The wide input range is matched for Li-Ion battery applications. The ST1208 LED drivers feature a fractional change pump implementation with efficiency comparable to a switching regulator without costly inductors. Only four tiny ceramic capacitors are required, and no external inductor is required for operation that provides a reduced-EMI solution. Proprietary low noise mode switching circuit and constant output current allow the use of extremely small input and output capacitor. The ST1208 contains a thermal management circuit to protect the device under continuous ou……
