To use the limited battery current available for flash, Analog Devices, Inc. has designed ADP1650 white LED driver, which features a programmable I²C-compatible interface, programmable torch and flash currents for one LED up to 1500mA, two independent TxMASK inputs and a 4-bit ADC.

It can provide high efficiency at 85% at the typical battery voltage (90% peak). The ultra-compact ADP1650 measures only 2 × 1.5mm in a 12-ball WLCSP package and reduces PCB requirements.

It enables a complete high power flash design in less than 17mm² by integrating a programmable 1.5-MHz or 3.0-MHz synchronous inductive boost converter, a tiny, 1-mm high, low-cost, 1µH power inductor, and an 0603 case-size input and output capacitor.

The new LED driver operates efficiently over the entire battery voltage range by maximizing the input-power-to-LED-power conversion and minimizing battery current draw during flash events.

The ADP1650 connects easily to the latest image sensors and image processors to provide excellent picture quality in low ambient light environments. The ADP1650 is priced at $0.95.