General Description The AHK3292 is a linear current-sink LED driver, capable of driving one or two LEDs up to 30.2mA each. Featuring individual low resistance, low drop-out voltage current sinks, the AHK3292 allows the LEDs to be regulated directly from a Lithium Ion/Polymer battery without the need for an additional step-up power supply, thereby reducing the external component count, eliminating switching noise and maximizing efficiency. AnalogicTech’s Simple Serial Control™ (S2Cwire™) interface is used to enable, disable, and set the LED drive current for 32-level linear scale LED brightness control. For maximum flexibility the LED current can be set, up to a maximum of 30.2mA per channel, using an external RSET resistor. The AHK3292 is packaged in a Pb-free 6-pin SOT23 package and is available over a -40 to +85OC temperature range. Features • 2.7V to 5.5V Input Supply Range • Drives up to 2 LEDs at up to 30.2mA each • Low Resistance Current Sinks ? Low Dropout, Typically 40.5mV at Full Scale • Linear LED Output Current Control ? S2Cwire Interface • Single-wire • 32 Steps • ±10% LED Output Current Accuracy • ±3% LED Output Current Matching • Low Current Shutdown Mode • Low Cost 6-pin SOT23 Package Applications • Entry Level Mobile Phones • Indicator LEDs • Keyboard Backlight • MP3 Players
