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LP3302S 概述
The LP3302S is a 1.2MHz PWM boost switching regulator designed for constant- current white LED driver applications. The LP3302S can drive a string of up to 7 white LEDs from a 3.0V supply or 24 white LEDs from a 5V supply in series, ensuring uniform brightness and eliminating several ballast resistors. The LP3302S implements a constant frequency 1.2MHz PWM control scheme. The high requency PWM operation also saves board space by reducing external component sizes. To improve efficiency, the feedback voltage is set to 250mV, 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.
LP3302S特征
· High Efficiency: 88%
· 1.2MHz Fixed-Frequency PWM Operation
· Maximum Output Voltage up to 25V
· Operating Range : 2.7V to 6V
· Shutdown Supply Current:<1uA
· Available in TSOT23-6 Package
· Built-in Over Voltage Protection
· Minimize the External Component
· RoHS Compliant and 100% Lead Pb-Free
LP3302S应用
· WLED Backlight driver
· OLED Backlight driver
· PDA
· DSC
· Camera Flash WLED driver
