IXYS Corporation has introduced an innovative inductor-less, high efficiency 1.2 A WLED driver, LDS8991, which is ideal for HB LED photoflash and torch for digital cameras, video cameras and smart phone.

It can drive a HB LED at 1.2 A in FLASH mode or at 200 mA in TORCH mode, and provide full output power from a single-cell Lithium-Ion battery or supply voltage in the range from 2.7 to 5.5 V.

The 1.2A FLASH and 200 mA TORCH currents are factory programmed. Consult factory if other current values are desirable. FLASH current can be programmed in 50 mA steps from 100 mA to 1.2A, while TORCH current can be programmed in 1.5 mA steps from 3 mA to 200 mA.

The device can operate in 1-x and 2-x charge pump modes and the inclusion of a low dropout PowerLite(TM) Current Regulator (PCR) operating down to 150 mV increases the device efficiency up to 90%.
The device exhibits a robust protection system (over-voltage, over-temperature, under-voltage and short-circuit), while the shutdown current is below 1 microamp, which is ideal for battery operated products.

The driver requires only three small external capacitors -- 1microfarad at the input, another 1microfarad as a charge pump flying capacitor and a 2.2 microfarad capacitor at the output.
The device is available in a tiny 3 x 3 x 0.8 mm 12-pin TDFN package allowing a thin profile of the application.

About IXYS Corporation
IXYS Corporation makes and markets technology-driven products to improve power conversion efficiency, generate solar and wind power, and provide efficient motor control for industrial applications. IXYS offers a diversified product base that addresses worldwide needs for power control, electrical efficiency, renewable energy, telecommunications, medical devices, electronic displays, and RF power.