Electronic Design

LED Flash Driver Improves Picture Quality

Groomed for the cameras found in mobile phones as well as digital still cameras, the AS3645 white-LED flash driver allegedly provides 25% higher output current than existing equivalents for improved picture and video quality. The inductive device drives up to 1A and can be used in single LED flash or double LED flash environments.  The high-side current source works with up to 2 x 500 mA with two LEDs in series and up to 720 mA with one LED. The device also auto detects whether to employ single- or dual-LED mode and enables direct one-button torch mode. The AS3645 is available in a WL-CSP package and specifies an operating temperature range from -30°C to +85°C. Price for the AS3645 is under $0.90 each/1,000. AUSTRIAMICROSYSTEMS USA INC., Raleigh, NC. (919) 676-5292.


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