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MP3389 - Step-up White LED Driver

Description

The MP3389 is a step-up controller with 12channel current sources designed for driving the WLED arrays for large size LCD panel backlighting applications.

The MP3389 uses current mode, fixed frequency architecture.

The switching frequency is programmable by an external frequency setting resistor.

Features

  • High Efficiency and Small Size.
  • 5V to 28V Input Voltage Range.
  • Balanced Driver for 12 Strings of WLEDs.
  • Maximum 60mA for Each String.
  • 2.5% Current Matching Accuracy Between Strings.
  • Programmable Switching Frequency.
  • PWM or DC Input Burst PWM Dimming.
  • Open and Short LED protection.
  • Programmable Over-voltage Protection.
  • Under Voltage Lockout.
  • Thermal Shutdown.
  • 28-pin TSSOP and 28-pin SOIC P.

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Full PDF Text Transcription

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The Future of Analog IC Technology MP3389 12–String, Step-up White LED Driver DESCRIPTION The MP3389 is a step-up controller with 12channel current sources designed for driving the WLED arrays for large size LCD panel backlighting applications. The MP3389 uses current mode, fixed frequency architecture. The switching frequency is programmable by an external frequency setting resistor. It drives an external MOSFET to boost up the output voltage from a 5V to 28V input supply. The MP3389 regulates the current in each LED string to the programmed value set by an external current setting resistor. The MP3389 applies 12 internal current sources for current balance. And the current matching can achieve 2.5% regulation accuracy between strings.
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