NEW ANALOG DEVICES LED DRIVER ENABLES BRIGHTER FLASH IN CAMERA-PHONES
Analog Devices, Inc. (NYSE: ADI), a global leader in signal processing technologies and high-performance semiconductors for digital cameras, has introduced a white LED driver for the camera-phone flash function that uses a new portable power management technique to maintain picture quality even when the battery is taxed by multiple phone functions operating simultaneously. An output current power management feature reduces battery-current overstress when the camera flash is activated at the same time the phone is receiving an RF (radio frequency) signal.
Innovative portable power management technique improves image quality in camera-phones.
In addition, unlike standard step-up dc-dc converters, the ADP1653 features a logic-input pin that reduces the white LED current to its lowest operation level in less than 50 microseconds when the phone activates the power amplifier to send an RF transmission. This current sequencing technology further extends battery life without compromising photo image quality.
Under normal operating conditions ADI’s new ADP1653 high-efficiency, high-brightness, dual, white LED driver enables a brighter camera flash than single or low-efficiency white LED drivers, which translates into better picture quality in low-light conditions.
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