LP3322数据手册LPSemi中文资料规格书

描述 Description

The LP3322 is a 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 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/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.

特性 Features

· High Efficiency: 88%
· 1MHzFixed-Frequency PWM Operation
· Maximum Output Voltage up to 36V
· Operating Range : 2.7V to 6V
· Shutdown Supply Current:<1uA
· Available in SOT23-6&TSOT23-6 Package
· Built-in 36V Over Voltage Protection
· Minimize the External Component
· RoHS Compliant and 100% Lead (Pb)-Free

应用 Application

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