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MP3384 - 4-String White LED Driver

Description

The MP3384 is a step-up converter with 4-channel current sources designed for driving the white LED arrays for large size LCD panel backlighting applications.

The MP3384 uses current mode, fixed frequency architecture.

The switching frequency can be selected at 1.25MHz or 625kHz.

Features

  • High Efficiency and Small Size.
  • 4.5V to 25V Input Voltage Range.
  • 50V Maximum Step-up Voltage.
  • Balanced Driver for 4 Strings of WLED.
  • 2.5% Current Matching Accuracy Between Strings.
  • Selectable Switching Frequency: 1.25MHz or 625kHz.
  • PWM Dimming.
  • Programmable Over-voltage Protection.
  • Under Voltage Lockout.
  • Open and Short LED Protection.
  • Thermal Shutdown.
  • Small 16-pin QFN (3mm x 3mm).

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Full PDF Text Transcription

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The Future of Analog IC Technology MP3384 50V, 4-String White LED Driver DESCRIPTION The MP3384 is a step-up converter with 4-channel current sources designed for driving the white LED arrays for large size LCD panel backlighting applications. The MP3384 uses current mode, fixed frequency architecture. The switching frequency can be selected at 1.25MHz or 625kHz. It generates an output voltage up to 50V from a 4.5V to 25V input supply. The MP3384 independently regulates the current in each LED string to the user programmed value set by an external current setting resistor. The MP3384 applies 4 internal current sources to achieve a current balance of 2.5% regulation accuracy between strings.
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