器件名称: AAT3169
功能描述: High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
文件大小: 858.99KB 共13页
简 介:PRODUCT DATASHEET
AAT3169
SwitchRegTM High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications
Features
VIN Range: 2.7V to 5.5V Fully Programmable Current with Single Wire 16-Step Logarithmic Scale 15/20/30mA Max Current Four Low-Current Settings Down to 115A Low IQ (65A) for Single-Channel, Low-Current Mode Tri-Mode 1X, 1.5X, and 2X Charge Pump for Maximum Efficiency and VF Coverage Drives Up to Six LEDs Individual Main-Sub (5-1) Group Control No Inductors, Low Noise Operation 1MHz Constant Switching Frequency Small Application Circuit Built-In Thermal Protection Built-In Auto-Disable for Open Circuit Automatic Soft Start IQ <1A in Shutdown Thermally-Enhanced STDFN33-14 or QFN44-16 Package
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 IN and OUTCP) make this part ideally suited for small, batterypowered 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-cu……
