描述 Description

The LP3368 charge pump LED driver is designed for powering dual channel high brightness LEDs for camera flash applications. The LP3368 automatically switches modes between step-up and step-down ensuring that LED current does not depend on the forward voltage. The LP3368 provides two current levels for TORCH and FLASH modes in each channel. In TORCH mode, The LED current sense reference voltage is 50mV. The LED current can be determined by current sense resistor. In FLASH mode, the current sense reference voltage can be adjusted by external resistor. The maximum LED current can be set up to 1A. The LP3368 is available in a 16-lead 4mm*4mm TQFN-16 package and is rated over the -40°C to 85°C temperature range.

特性 Features

··? Input Voltage Range: 2.7V to 5.5V? Adjustable FLASH Mode Current? Output Current up to 1A in Each Channel? Up to 95% Efficiency in Charge Pump Mode? Automatic Step up/down Mode Switchover? Minimum External Components: No Inductors? <1uA Shutdown Current? 2 MHz High Frequency Operation? 50mV Reference for Low Loss Sensing? PWM Dimming Control? Automatic Soft Start Limits Inrush Current? Over-Voltage Protection? Over-Current protection? Thermal Fault Protection? Low Ripple and EMI? Ultra-Low Dropout Voltage in Buck Mode? 4mm×4mm TQFN-16 Package? RohS Compliant and 100% Lead (Pb)-Free

應(yīng)用 Application

·? White/Yellow LED Torch/Flash for mobile phone? Generic lighting/Flash/Strobe Applications? PDA/DSC/Camcorder? MID/GPS Applications