器件名称: AAT3169ISN-T1
功能描述: High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
文件大小: 421.69KB 共14页
简 介:High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications General Description
The AAT3169 is a low noise, constant frequency charge pump DC/DC converter that uses a tri-mode load switch (1X), fractional (1.5X), and doubling (2X) conversion to maximize efficiency for white LED applications. The AAT3169 is capable of driving six LEDs for a total of 180mA 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 VIN and VOUT) 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 65A of housekeeping current. Each output of the AAT3169 is equipped with builtin protection for VOUT short-circuit and auto-disable for load short-circuit conditions. Built-in soft-start circuitry prevents excessive inrush current during start-up. A low-current shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1A. The AAT3169 is available in a Pb-free, space-saving, thermally-enhanced 16-pin 3x4mm TDFN or 4x4mm QFN package.
AAT3169
Features
ChargePump
VIN Range: 2.7V to 5.5V Fully Programmable Current with Si……