LM27966

LM27966 www.ti.com SNVS448B – JULY 2006 – REVISED MAY 2013 LM27966 White LED Driver with I2C Compatible Interface Check for Samples: LM27966 FEATURES 1 2 91% Peak LED Drive Efficiency No Inductor Required 0.3% Current Matching Drives 6 LEDs with up to 30mA per LED 180mA of total driver current I2C Compatible Brightness Control Interface Adaptive 1×- 3/2× Charge Pump Resistor-Programmable Current Settings External Chip RESET Pin (RESET) Extended Li-Ion Input: 2.7V to 5.5V Small low profile industry standard leadless package, WQFN 24 : (4mm x 4mm x 0.8mm) APPLICATIONS Mobile Phone Display Lighting PDAs Backlighting General LED Lighting DESCRIPTION The LM27966 is a highly integrated charge-pumpbased display LED driver. The device can drive up to 6 LEDs in parallel with a total output current of 180mA. Regulated internal current sources deliver excellent current and brightness matching in all LEDs. The LED driver current sources are split into two independently controlled groups. The primary group, which can be configured with 4 or 5 LEDs, can be used to backlight the main phone display. An additional, independently controlled led driver is provided for driving an indicator or other general purpose LED function. The LM27966 has an I2C compatible interface that allows the user to independently control the brightness on each bank of LEDs. The device provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of...