AAT3164

DATA SHEET AAT3164 AAT3164 High Efficiency 1x/1.5x/2x Charge Pump for Six-Channel White LED Applications General Description The AAT3164 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 device is capable of driving up to six channels of LEDs at up to 30mA per channel 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 1µF flying capacitors and two small 1µF capacitors at IN and OUT) makes this part ideally suited for small, battery-powered applications. Skyworks' patented single-wire Simple Serial Control (S2Cwire™) serial digital input is used to enable, disable, and set current for each LED with 16 levels from a maximum of 40mA down to 50µA. The maximum current level is programmed via an external resistor. To save power, th...