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The RT8547 is a high efficiency, high current, Boost-type flash LED driver capable of 1.6A maximum output current. It is an ideal power solution for LED photo flash applications in all single cell Lithium-ion/polymer battery operated products. <p align="justify">The RT8547 maintains output current regulation by switching the internal high side and low power switches switch transistors. The power switches are pulse width modulated at a fixed frequency of 2MHz. The high switching frequency allows the use of small inductor and output capacitor that makes the RT8547 being ideally suited for small battery powered applications. </p><p align="justify">One-wire dimming control function is designed to set the strobe mode current level through the FLSET pin for the flash LEDs. </p><p align="justify">The RT8547 contains over voltage protection, over current protection and over temperature protection functions to protect the device from output open circuit and short-circuit conditions. An internal soft- start control circuit is built-in to prevent excessive inrush current during start-up. In shutdown mode, the supply current is reduced to 2μA.</p>
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<li class="mv5"> Input Voltage Range : 2.8V to 5.5V<br /></li><li class="mv5"> Current Accuracy within 5%<br /></li><li class="mv5"> Up to 1.6A Regulated Output Current<br /></li><li class="mv5"> Up to 88% Efficiency with Small Magnetics<br /></li><li class="mv5"> 2MHz Switching Frequency<br /></li><li class="mv5"> Separate Strobe and Torch Mode Current<br /></li><li class="mv5"> Programmable Safety Timer<br /></li><li class="mv5"> Input Current Limit <br /></li><li class="mv5"> Over Voltage Protection for LED Open<br /></li><li class="mv5"> Over Temperature Protection<br /></li><li class="mv5"> True Load Disconnect<br /></li><li class="mv5"> Shutdown Current : <2μA</li>
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<li class="mv5"> Cellular Phones<br /></li><li class="mv5"> Digital Cameras<br /></li><li class="mv5"> PDAs and Smart Phones<br /></li><li class="mv5"> Probable Instruments<br /></li><li class="mv5"> Point of Load Regulation for High-Performance DSPs, FPGAs, and ASICs</li>
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