Flash LED Driver – up to three times more power

Micrel announced the MIC2291 , a 1.2MHz Pulse Width Modulated (PWM) DC/DC white LED driver designed to provide high power within an extremely small footprint. The device has been optimized for high current photo flash LED driver applications such as the latest cellular camera phones and PDAs.

The chip is currently sampling with volume quantities available within 12 weeks. Available in 2 x 2mm MLF&#153-8L and thin SOT23-5L package options, the device is priced at $1.27 and $1.20, in 1K quantities, respectively. Lead-free options are also available.

Built using Micrel's proprietary in-house process, the MIC2291 features an internal 34V switch that can handle more than 1A of current. This combination of high voltage and high power allows the device to easily light up high current photo flash LEDs which are commonly used in camera phone and PDA applications.

The highest level of protection is ensured with internal current limit, thermal shutdown, and output over voltage protection. The MIC2291 gives up to three times the current of competing white LED drivers while using just half the board area required by larger DC/DC converters.

Micrel Semiconductor Ltd , Newbury, Berkshire RG14 5QS, UK.

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