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ST1208 Datasheet(PDF) 1 Page - Sitronix Technology Co., Ltd. |
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ST1208 Datasheet(HTML) 1 Page - Sitronix Technology Co., Ltd. |
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1 / 12 page  ST Sitronix ST1208 3-Channel White LED Driver V1.1 1/12 2004/10/27 ! 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 " 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. Package ST1208-Q QFN-16 ST1208-T TSSOP-16L ST1208-B 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 output short circuit condition. ! Applications " Cellular phones " PDAs " Portable communication devices " LED/Display backlight driver " Digital Cameras " Handheld Electronics " Flash LED driver |
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