6 Channels, Max.150mA/Ch Boost WLED Driver With 15000:1 Dim Ratio and I2C

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Product Description

The MP3367 is a step-up converter with 6-channel current sources. It is designed for driving the white LED arrays as backlighting of middle or small size LCD panel.

The MP3367 uses peak-current mode as its PWM control architecture to regulate the boost converter. 6 channel current sources are applied into the LED cathode to adjust the LED brightness. It regulates the current in each LED string to the value set by an external current-setting resistor, with 2.5% current regulation accuracy between strings.

MP3367 employs a low on-resistor MOSFET and a low headroom voltage design to get the higher efficiency. It has standard I2C digital interface for easy use. The switching frequency can be programmed by a resistor, I2C interface or external clock.

MP3367 provides analog/PWM/mix dimming mode with PWM input. Dimming mode can be selected by I2C interface or MIX/AD pin. It also has the phase shift function to eliminate the noise when PWM dimming.

Rich protections are designed to guarantee safety operation. The protection modes include OCP (over-current protection), OVP (over-voltage protection), OTP (over-temperature protection), LED short and open protection. Besides the LED current decreases automatically at higher temperature.

The MP3367 is available in QFN24-4mmX4mm and TSSOP28-EP package.

Product Features

  • 3.5V to 36V Input Voltage Range
  • 6 Channels with Max. 150mA per Channel
  • Internal 100mΩ, 50V MOSFET
  • Programmable Up to 2.2MHz Fsw
  • External Sync SW Function
  • Multi-Dimming Operation Mode thru PWM input Including:
  1. Direct PWM Dimming
  2. Analog Dimming
  3. Mix Dimming with 25%/12.5% transfer point
  • 15000:1 Dim Ratio in PWM Dim at Fpwm≤200Hz
  • 200:1 Dim Ratio at Analog Dim thru PWM Dim Signal Input.
  • Excellent EMI Performance, Frequency Spread Spectrum
  • I2C Interface
  • Phase Shift Function for PWM Dimming
  • 2.5% Current Matching
  • Cycle by Cycle Current Limit
  • Disconnect Vout  from Vin
  • LED Current Auto Decrement at High Temperature
  • LED Short/Open, OTP, OCP, Inductor Short Protection
  • Programmable LED Short Threshold
  • Programmable OVP Threshold
  • Fault Indicator Signal Output
  • QFN24-4mmX4mm and TSSOP28-EP Package


  • Isw Limit (A)3
  • Ishutdown (µA)1
  • Vin (min) (V)3.5
  • Vin (max) (V)36
  • Channels6
  • fsw (min) (kHz)200
  • Ichannel (max) (A)0.15
  • LEDx ABS Voltage (V)50
  • fsw (max) (kHz)2200
  • Vout (max) (V)45
  • Vfb (V)0.4
  • GradeCatalog
  • Rds(on) (mΩ)100
  • PackageQFN-24 (4x4), TSSOP28 EP
  • Power MOSFETIntegrated
  • TopologyBoost
  • Dimming (Output)P-Dim, A-Dim, Mix-Dim
  • Typical LCD Screen SizesSmall (<10"), Medium (10"-17")
  • Other FeaturesHigh Dimming Ratio, I2C, Prog.LED Short Threshold, Prog.OVP Threshold