4.5V-25Vin, 50Vout, 8-Channel Boost WLED Driver

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Product Description

The MP3388 is a step-up converter with 8-channel current sources designed for driving the white LED arrays for large size LCD panel backlighting applications. The MP3388 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 MP3388 independently regulates the current in each LED string to the user programmed value set by an external current setting resistor. The MP3388 applies 8 internal current sources in each LED string terminal to achieve a current balance of ±3% regulation accuracy between strings. Its low 600mV regulation voltage on LED current sources reduces power loss and improves efficiency. The MP3388 features external PWM dimming or DC input PWM dimming, which allows the flexible control of the backlighting luminance.. The dimming PWM signal can be generated internally, and the dimming frequency is programmed by an external setting capacitor.

Product Features

  • High Efficiency and Small Size
  • 4.5V to 25V Input Voltage Range
  • 50V Maximum Step-up Voltage
  • Balanced Driver for 8 Strings of WLED
  • ±3% Current Matching Accuracy Between Strings
  • Selectable Switching Frequency: 1.25MHz or 625kHz
  • PWM or DC Input Burst PWM Dimming
  • Programmable Over-voltage Protection
  • Under Voltage Lockout
  • Open and Short LED protection
  • Thermal Shutdown


  • Isw Limit (A)2
  • Ishutdown (µA)2
  • Vin (min) (V)4.5
  • Vin (max) (V)25
  • Channels8
  • 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)180
  • PackageQFN-24 (4x4), SOIC-28
  • Power MOSFETIntegrated
  • TopologyBoost
  • Dimming (Output)P-Dim
  • Iq (mA)1.8
  • Typical LCD Screen SizesMedium (10"-29")
  • Other FeaturesOutput/Input Disconnect

Reference Materials

Quality Policy, Certificates & Reliability Reports
All MPS parts are lead-free, halogen-free and adhere to the RoHS directive. See Environmental section for details.