Austrian micro-electric push new LED driver night shoot master

Austriamicrosystems announced on July 4 that it has introduced an LED flash driver that will provide better flash output performance for mobile smart devices.

The new LED flash driver model, the AS3630, can drive up to 8A of current, enabling mobile devices to capture high-resolution photos. Compared to the current LED flash drive that delivers up to 2A of output power, the AS3630 has up to 4x brightness output and supports faster shutter speeds.

The AS3630 8A LED flash driver uses an innovative architecture that leverages the energy stored in supercapacitors (electric double layer capacitors - EDLC), which is currently being patented. When driving two LEDs in series, the driver will increase the output voltage from 5.5V of the supercapacitor to above 9V to meet the forward voltage requirements of the LED. The boost topology used in the device also allows flash illumination to last longer when the independent capacitor output voltage is lower than the forward voltage of the LED. This architecture allows the use of very small capacitors.

Two series of flash drives led to provide a consistent light output. In high-power flash applications, parallel LED architectures often result in large variations in output light due to differences in LED lamp production. Austrian Microelectronics uses a tandem LED architecture that perfectly matches the light output from the two flash LEDs, independent of the LED forward voltage difference.

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