LP3322

Preliminary Datasheet LP3322 High Performance, Constant Current Switching Regulator For 10PCS White LED In Series General Description Features The LP3322 is a 1.1MHz PWM boost switching regulator designed for constant- current white LED driver applications. The LP3322 can drive a string of up to 10 white LEDs in series or 3s9p LEDs from 3.6V, ensuring uniform brightness and eliminating several ballast resistors. The LP3322 implements a constant frequency 1.1MHz PWM control scheme. The high frequency PWM operation also saves board space by reducing external component sizes. To improve efficiency, the feedback voltage is set to 200mV and 300mV, which reduces the power dissipation in the current setting resistor. Highly integration and internal compensation network minimizes as 5 external component counts. Optimized operation frequency can meet the requirement of small LC filters value and low operation current with high efficiency. Ordering Information LP3322 High Efficiency: 88% 　 1.1MHzFixed-Frequency PWM Operation Maximum Output Voltage up to 36V Operating Range : 2.7V to 5.5V Shutdown Supply Current:<1uA 　 Available in SOT23-6 Package 　 Built-in 39V Over Voltage Protection 　 Minimize the External Component RoHS Compliant and 100% Lead (Pb)-Free Applications WLED Backlight driver OLED Backlight driver PDA MID/PTV Typical Application Circuit Vin Cin 10uF 10uH SD103 Cout 1uF 1 LX F: Pb-Free Package: B6: SOT23-6 FB Voltage Default: VFB=200mV A: VFB=300mV Pin Conf...