器件名称: AAT3167IFO-T1
功能描述: High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
文件大小: 438.85KB 共14页
简 介:High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description
The AAT3167 is a low noise, constant frequency charge pump DC/DC converter that uses a trimode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications. The AAT3167 is capable of driving five LEDs for a total of 135mA from a 2.7V to 5.5V input. The current sinks may be operated individually or in parallel for driving higher current LEDs. A low external parts count (two 1F flying capacitors and two small 1F capacitors at IN and OUTCP) make this part ideally suited for small, battery-powered applications. AnalogicTech's AS2Cwire (Advanced Simple Serial Control) serial digital input is used to enable, disable, and set current for each LED with a 16-level logarithmic scale plus four low-current settings down to 115A. For optimized efficiency, low-current settings require only 50A of housekeeping current. Each output of the AAT3167 is equipped with builtin protection for output short circuit and auto-disable for load short-circuit conditions. Built-in softstart circuitry prevents excessive inrush current during start-up. A low-current shutdown feature disconnects the load from the input and reduces quiescent current to less than 1A. The AAT3167 is available in a Pb-free, space-saving, thermally-enhanced, 14-pin 3x3mm STDFN or 16-pin 4x4mm QFN package and is rated over the -40°C to +85°C temperature range.
AAT3167
Features
ChargePump
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