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1000mA LED flash driver ups output by 25%

Posted: 19 Mar 2010     Print Version  Bookmark and Share

Keywords:flash driver  LED driver  LED flash 

AS3645 flash driver

austriamicrosystems offers the AS3645 inductive, ultrasmall, high-efficiency single/dual LED flash driver that claims to offer 25 per cent higher output current than existing equivalents.

A higher flash power enhances picture and video quality especially in low-light environment at the same system size. The AS3645 inductive flash driver drives up to 1000mA and can be used in single LED flash or double LED flash environments. The high-side current source works with up to 2 x 500mA with two LEDs in serial configuration, and up to 72mA with 1 LED. When driving two LEDs in series, LEDs draw identical currents and provide output light matching and thermal dissipation.

The AS3645 auto detects whether to employ single or dual LED mode, and enables direct one-button torch (flashlight) mode. Safety features protect against circuit damage and improve test time, including programmable current limiting, auto test (LED open/short detection), over-voltage and under-voltage, over-temperature, and automatic flash timeout timer for thermal LED protection during flash. The AS3645 is available in a tiny WL-CSP package (3x4 balls 0.5mm pitch, 2mm x 1.6mm) and has an operating temperature range of -30°C to +85°C (ambient).

Pricing for the AS3645 is less than Rs.41.56 ($0.90) in 1000-piece quantities.

- Ismini Scouras
eeProductCenter





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