MP4000 Offline High Brightness White LED Driver Controller SOIC8

MP4000 Offline High Brightness White LED Driver Controller SOIC8

The MP4000 is a high efficiency step-down converter designed for driving high brightness Light Emitting Diodes (LEDs).

Key Specifications

Features

• Constant-current LED Driver
• Power MOSFET Zero-Current Turn On
• No Freewheeling Diode Reverse Recovery Issues
• High Efficiency and Reliability in Boundary Mode Operation
• Low 0.9mA Operation Current
• PWM or DC Input Burst Dimming Control
• Hiccup Short Circuit Protection
• UVLO, Thermal Shutdown
• Maximum Frequency is Limited to 110kHz
• Available in SOIC8 Package

Typical Application Circuit

Applications

• DC/DC or AC/DC LED Driver applications
• General Illumination
• Industrial Lighting

Design Notes

• Channel-to-channel current matching sets backlight uniformity; check the matching spec at the current you will actually run.
• In boost topologies the OVP threshold must clear the worst-case forward voltage of the longest string, including temperature and binning spread.
• Keep PWM dimming above 200 Hz to stay clear of visible flicker, and away from the audio band if the product has a speaker.
• Size the inductor and output capacitor for the string current ripple, not the total LED current.

Common Questions