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White LED flash driver improves camera phone picture quality

Posted: 22 Jul 2010 ?? ?Print Version ?Bookmark and Share

Keywords:LED driver? power conversion?

Analog Devices Inc. (ADI) has beefed up its power management product portfolio with a 1500-mA white LED driver.

The ADP1650 features a programmable I�C-compatible interface, programmable torch and flash currents for one LED up to 1500 mA, two independent TxMASK inputs and a 4-bit ADC. The inductive-based LED flash driver also provides high efficiency at 85 percent at the typical battery voltage (90 percent peak), which reduces high levels of input battery current during flash and limits battery current drain in torch mode. The ADP1650 measures 2mm 1.5mm in a 12-ball WLCSP package and reduces PCB requirements.

The ADP1650 enables a complete high power flash design in less than 17 mm2 by integrating a programmable 1.5MHz or 3.0MHz synchronous inductive boost converter, a tiny, 1-mm high, low-cost, 1-?H 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. Designed to operate using the limited battery current available for flash, 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 each.

- Ismini Scouras
EE Times





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