MP24893 6-36V, 1A Step Down White LED Driver TSOT23

MP24893 6-36V, 1A Step Down White LED Driver TSOT23

The MP24893 is a high efficiency step-down converter designed in continuous current mode for driving the high brightness LEDs from wide input voltage of 6V to 36V.

Key Specifications

Features

• Internal 36V MOSFET
• Wide 6V-to-36V Input Range
• 1A Output Current
• High Efficiency
• Hysteretic Control
• PWM and Analog Dimming
• 1000:1 PWM Dimming Resolution
• UVLO, Thermal Shutdown
• Available in TSOT23-5 and QFN6 Packages

Typical Application Circuit

Applications

• Low-Voltage Halogen Replacement
• Low-Voltage General Illumination
• Automotive/Decorative LED Lighting
• Signs/Emergency 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