描述 Description

The LP3367 buck/boost charge pump LED driver is designed for powering high brightness white LEDs for camera flash applications. The LP3367 automatically switches modes between step-up and step-down ensuring that LED current does not depend on the forward voltage. The LP3367 provides two current levels for TORCH and FLASH modes. In TOUCH 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 LP3367 is available in a 10-lead 3mm*3mm TDFN-10 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? Up to 95% Efficiency in TORCH Mode? Automatic Buck/Boost Mode Switchover? Minimum External Components: No Inductors? <1uA Quiescent 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? 1.6 Second Timeout in FLASH Mode? 3mm×3mm TDFN-10 Package? RohS Compliant and 100% Lead (Pb)-Free

應用 Application

·? WLED Backlight driver? OLED Backlight driver? PDA? MID/PTV