MP4050 LED Driver TSOT23

MP4050 LED Driver TSOT23

The MP4050 is a constant current LED driver integrated with an internal 500V MOSFET.

Key Specifications

Features

• Constant Current LED Driver
• 500V/7.2Ω MOSFET integrated
• Low Vcc Operating Current
• Maximum frequency limit
• Audible noise restrain
• Internal High Voltage Current Source
• Internal 200ns Leading Edge Blanking
• Thermal Shutdown (auto restart with Hysteresis)
• VCC Under Voltage Lockout with Hysteresis (UVLO)
• Open Lamp Protection

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