MP4050A High-Brightness LED Driver TSOT23

MP4050A High-Brightness LED Driver TSOT23

The MP4050A is a constant current LED driver with an integrated 500V MOSFET.

Key Specifications

Features

• Constant Current LED Driver
• Integrated 500V/8Ω MOSFET
• Low VCC Operating Current
• Maximum Frequency Limit
• Audible Noise Restrain
• Internal High-Voltage Current Source
• Internal 200ns Leading Edge Blanking
• Integrated Thermal Current Foldback
• Thermal Shutdown (Auto Re-Start with Hysteresis)
• VCC Under-Voltage Lockout with Hysteresis

Typical Application Circuit

Applications

• AC/DC or DC/DC LED Driver Application
• 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