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LP3311S - Constant Current Switching Regulator

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.

Key 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:.

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Datasheet Details

Part number LP3311S
Manufacturer Lowpowersemi
File Size 951.66 KB
Description Constant Current Switching Regulator
Datasheet download datasheet LP3311S Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.