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LP3390 - Constant Current Switching

General Description

The LP3390 is a high frequency, asynchronous boost converter for constant current white LED driver applications.

The internal MOSFET can support up to 8 White LEDs for backlighting and OLED power application,and the internal soft start function can reduce the inrush current.

Key Features

  • High Efficiency: 95%.
  • 1.2MHzFixed-Frequency PWM Operation.
  • Maximum Output Voltage up to 30V.
  • Operating Range : 2.5V to 5.5V.
  • Shutdown Supply Current:.

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Datasheet Details

Part number LP3390
Manufacturer Lowpowersemi
File Size 458.96 KB
Description Constant Current Switching
Datasheet download datasheet LP3390 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 LP3390 High Performance, Constant Current Switching for White LED and Boost Convertor General Description The LP3390 is a high frequency, asynchronous boost converter for constant current white LED driver applications. The internal MOSFET can support up to 8 White LEDs for backlighting and OLED power application,and the internal soft start function can reduce the inrush current. The LED current is initially set with the external sense resistor. To improve efficiency, the feedback voltage is set to 200mV, which reduces the power dissipation in the current setting resistor. The LP3390 implements a constant frequency 1.2MHz PWM control scheme. Optimized operation frequency can meet the requirement of small LC filters value .