The ADP1653 is a very compact， high efficiency， high power， camera flash LED driver optimized for cellular phones. The high efficiency and dynamic LED current control of the device improve flash brightness and picture quality in dimly lit environments. Efficiency peaks at 92% and is higher than charge pump solutions over the Li-Ion battery range. The device has a dual-mode interface that is configurable to 2-bit logic or an I2 C? interface. The indicator and high power LED currents are programmable with external resistors or through the I 2 C interface. To maximize overall flash brightness， the ADP1653 offers an input to reduce flash LED current in less than 50 μs， referred to as the Tx mask. Tx masking reduces battery stress by scaling back flash LED current during an RF transmission. The ADP1653 solution requires only four external components in I2 C mode and fits in a 6.4 mm × 7.2 mm space. The part integrates multiple safety features such as soft start， flash timeout， output current limit， thermal protection， and overvoltage protection. The ADP1653 operates over the ?40°C to +125°C junction temperature range.