MP4008

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High Brightness, Fast PWM Dimming WLED Boost Controller



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Product Description

The MP4008 is a current-mode controller designed for driving high brightness light emitting diodes (LEDs) with a wide input voltage from 9V to 28V. It can be used in boost and SEPIC topologies.
The MP4008 drives an external MOSFET with a fixed frequency architecture to regulate the LED current, which is measured through an external current-sense resistor. The LED current feedback voltage is 280mV. The switching frequency is fixed to 180kHz. The cycle-by-cycle current limit can be programmed by the sense resistor on CS. 
The MP4008 employs fast PWM dimming to the LED current with a high dimming ratio. 
Integrated protection features include under-voltage lockout, over-voltage protection, over-current protection, short LED protection, short output protection, short inductor/diode protection, and OTP.
The MP4008 is available in a SOIC-8 package.

Product Features

  • Constant Current WLED Driver
  • 280mV Feedback Voltage with ±1.8% Accuracy
  • 9V to 28V Input Voltage
  • Leading Edge Blanking for Current Sense
  • Frequency Fixed to 180kHz
  • Fast PWM Dimming
  • Soft Start
  • Over-Voltage Protection
  • Short LED Protection
  • Short Output Protection
  • Over-Current Protection
  • Short Inductor/Diode Protection
  • VIN UVLO
  • Thermal Shutdown
  • Available in a SOIC-8 Package

Parametrics

  • Vin (min) (V)9
  • Vin (max) (V)28
  • Channels1
  • fsw (min) (kHz)180
  • fsw (max) (kHz)180
  • Vfb (V)0.28
  • GradeCatalog
  • PackageSOIC-8
  • Power MOSFETExternal
  • TopologyBoost
  • Dimming (Output)P-Dim
  • Iq (mA)1.1
  • Typical LCD Screen SizesMedium (10"-29"), Large (30"-45")
  • Other Features Inductor Short Protection

Evaluation Kit

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Kit details

The EV4008-S-00A is designed to demonstrate the capabilities of MP4008. The MP4008 is a current mode controller designed for driving the high brightness Light Emitting Diodes (LEDs) with wide input voltage 9V-28V. It can be used both in Boost and SEPIC topologies.

With a 20-48V power supply PVIN and a 9-28V IC supply for MP4008, The evaluation board can drive a single LED string with the LED current regulated to 350mA and VLED voltage up to 70V. Apply a PWM dimming signal to do PWM dimming. The Over-Voltage protection, short LED protection, short inductor/diode protection and over current protection are integrated.

US$ 100.00 + tax