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High-Brightness, High-Current Accuracy WLED Controller
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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.
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Features & Benefits
- 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
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.