Flash LED Driver with 700mA Charge Pump CXUS65171 is a charge pump for high-current white LED driving used in camera flash applications. The architecture of two bucket capacitors is used to decrease

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The CXUS65171 is a charge pump for high-current white LED driving used in camera flash applications. The architecture of two bucket capacitors is used to decrease the output ripple and provides low EMI solution compared to inductive DC-DC regulators. The CXUS65171 has independent flash/torch/shutdown modes. The CXUS65171 is capable to output 500mA of regulated current in flash mode for the duration greater than 500ms. While driving 700mA output current, the reduced duration is limit by CXUS65171’s over-temperature protection. There is a one second safety timer in this mode to avoid LED damage caused by overheat. The CXUS65171 can outputs 20% of flash mode current continuously in torch mode. The flash mode has priority over the torch mode. A resistor connected to ISET pin, which is in series with the LED, is to set the current. The ISET voltage is 250mV and 50mV in flash and torch mode respectively. The GCXUS65171is available in tiny 10-pin 3x3mm TDFN package.

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„ Independent flash/torch/shutdown modes sq2嘉泰姆

„ Up to 700mA drive current sq2嘉泰姆

„ Flash timeout protection sq2嘉泰姆

„ Torch mode set to 20% of flash current sq2嘉泰姆

„ 1X/2X mode for torch mode to maximize efficiency sq2嘉泰姆

 „ Wide input voltage range from 3V to 5.5V sq2嘉泰姆

„<1μA shutdown current sq2嘉泰姆

„ Input/Output over-voltage protection sq2嘉泰姆

„ Short-circuit protection sq2嘉泰姆

„ Over-temperature protection sq2嘉泰姆

„ Tiny TDFN3X3-10 packagesq2嘉泰姆

   应用范围 返回TOPsq2嘉泰姆

„ Cellular camera phone sq2嘉泰姆

„ Digital still camera sq2嘉泰姆

„ PDA camera sq2嘉泰姆

„ Camcorder torch lampsq2嘉泰姆

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