MP3384L

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3V-25Vin, 50Vout, 4-Channel WLED Boost Converter



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Product Description

The MP3384L is a step-up converter to control up to 4 white LED strings for LCD backlighting.
The MP3384L employs a fixed-switching frequency that can be selected from either 625kHz or 1.25MHz. It takes a 3V-to-25V input supply: The low-end input voltage allows the MP3384L to power a tablet display from a single battery.
The MP3384L has 4 internal current sources to independently regulate the current in each LED string to a value set by an external, current-setting resistor. It achieves current balance within 2.5% regulation accuracy between strings. Its low 600mV regulation voltage for the LED current sources reduces power loss and improves efficiency.
The MP3384L features multiple protections, including under-voltage lockout, MOSFET current limiting, over-voltage protection, open/short LED protection, and thermal shut-down.
The MP3384L is available in a 3mm×3mm QFN16 package.

Product Features

  • Highly Efficient
  • 3V-to-25V Input Voltage Range
  • 50V Maximum Step-Up Voltage
  • Balanced Driver for 4 WLED Strings
  • 2.5% Current Matching Accuracy Between Strings
  • Selectable Switching Frequency: 625kHz or 1.25MHz
  • PWM Dimming
  • Programmable Over-Voltage Protection
  • Under-Voltage Lockout
  • Open and Short LED Protection
  • Thermal Shutdown
  • 3mm×3mm 16-pin QFN Package

Parametrics

  • Isw Limit (A)1.2
  • Ishutdown (µA)2
  • Vin (min) (V)3
  • Vin (max) (V)25
  • Channels4
  • fsw (min) (kHz)625
  • Ichannel (max) (A)0.03
  • LEDx ABS Voltage (V)50
  • fsw (max) (kHz)1250
  • Vout (max) (V)50
  • Vfb (V)0.6
  • GradeCatalog
  • Rds(on) (mΩ)500
  • 封装QFN-16 (3x3)
  • Power MOSFETIntegrated
  • TopologyBoost
  • Dimming (Output)P-Dim
  • Iq (mA)1.8
  • Typical LCD Screen SizesSmall (<10"), Medium (10"-29")