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LP3311S Datasheet

Part Number LP3311S
Manufacturers Lowpowersemi
Logo Lowpowersemi
Description Constant Current Switching Regulator
Datasheet LP3311S DatasheetLP3311S Datasheet (PDF)

Preliminary Datasheet LP3311S High Performance, Constant Current Switching Regulator For 8PCS White LED In Series General Description The LP3311S is a 1MHz PWM boost switching regulator designed for constant current white LED driver applications. The LP3311S can drive a string of up to 8 white LED in series, ensuring uniform brightness and eliminating several ballast resistors. The LP3311S implements a constant frequency 1MHz PWM control scheme. The high frequency PWM operation also saves boa.

  LP3311S   LP3311S






Constant Current Switching Regulator

Preliminary Datasheet LP3311S High Performance, Constant Current Switching Regulator For 8PCS White LED In Series General Description The LP3311S is a 1MHz PWM boost switching regulator designed for constant current white LED driver applications. The LP3311S can drive a string of up to 8 white LED in series, ensuring uniform brightness and eliminating several ballast resistors. The LP3311S implements a constant frequency 1MHz PWM control scheme. The high frequency PWM operation also saves board space by reducing external component size. To improve efficiency, the feedback voltage is set to 200 mV, 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 LP3311S Features  High Efficiency: 90%   1MHz Fixed-Frequency PWM Operation  Maximum Output Voltage up to 29V  Operating Range : 2.7V to 5.5V  Shutdown Supply Current:<1uA   Available in SOT23-6 Package   Built-in 29V Over Voltage Protection   Minimize the External Component  RoHS Compliant and 100% Lead (Pb)-Free Applications  WLED Backlight driver  OLED Backlight driver  PDA  MID/PTV F: Pb-Free Package: B6: SOT23-6 Pin Configurations IN OVP EN Typical Application Circuit Vin 10uF 4. 7uH Vin SW EN OVP 1uF 65 4 GND FB LP3311S R1 1 23 .


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