MP24881 10-60V, 1.1A, 2MHz Synchronous Step-Down LED Driver SOIC

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MP24881 10-60V, 1.1A, 2MHz Synchronous Step-Down LED Driver SOIC

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MPS Step-Down SOIC LED Drivers LED Power Management

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MP24881 10-60V, 1.1A, 2MHz Synchronous Step-Down LED Driver SOIC

The MPS MP24881 is a Synchronous Step-Down LED Driver. It operates from a 10 V to 60 V input, is rated for 1.1 A and switches at 2 MHz. It is supplied in a SOIC package.

The MP24881 is a 60V, monolithic, synchronous step-down LED driver with an integrated N-channel MOSFET and rectifier.

Key Specifications

Part Number	MP24881
Function	Synchronous Step-Down LED Driver
Input Voltage	10 V to 60 V
Current Rating	1.1 A
Switching Frequency	2 MHz
Interface	PWM
Package	SOIC
Ordering Codes	MP24881

Features

Wide 10V to 60V Operating Input Voltage (VIN) Range
Up to 1.1A of LED Current (ILED)
Synchronous Step-Down Converter
Internal 100mΩ High-Side MOSFET (HS- FET)
Internal 110mΩ Synchronous Rectifier (SR)
Hysteretic Control
Up to 2MHz Switching Frequency (fSW)
100mV Reference Voltage (VREF)
LED Common Cathode Connection
Excellent Pulse-Width Modulation (PWM) Dimming Performance: o Up to 25 kHz PWM Dimming Frequency o 20000:1 Wide Dimming Range

Typical Application Circuit

Applications

Landscape 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.