MPQ24833-B 4.5-55V, 3A, 420kHz LED Driver SOIC

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MPQ24833-B 4.5-55V, 3A, 420kHz LED Driver SOIC

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pMPS MPQ24833-B — LED Driver, 4.5-55V input, 3 A output, SOIC, AEC-Q100./p

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Automotive AEC-Q100 MPS SOIC LED Drivers LED Power Management

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MPQ24833-B 4.5-55V, 3A, 420kHz LED Driver SOIC

The MPS MPQ24833-B is a LED Driver. It operates from a 4.5 V to 55 V input, is rated for 3 A and switches at 420 kHz. It is supplied in a SOIC package. The part is AEC-Q100 qualified.

The MPQ24833-B is a 55V, 3A, LED driver suitable for step-down, inverting step-up/step- down, and step-up applications.

Key Specifications

Part Number	MPQ24833-B
Function	LED Driver
Input Voltage	4.5 V to 55 V
Current Rating	3 A
Switching Frequency	420 kHz
Interface	PWM
Package	SOIC
Qualification	AEC-Q100
Ordering Codes	MPQ24833-B

Features

3A Maximum Output Current
Unique Step-Up/Step-Down Operation (Buck-Boost Mode)
Wide 4.5V to 55V Operating Input Range for Step-Down Applications (Buck Mode)
0.15Ω Internal Power MOSFET Switch
Fixed 420kHz Switching Frequency
Analog and PWM Dimming
0.2V Reference Voltage
6μA Shutdown Mode
No Minimum Number of LEDs Required
Stable with Low-ESR Output Ceramic Capacitors

Typical Application Circuit

Applications

General LED Illumination
LCD Backlight Panels
Automotive Lighting
Portable Multimedia Players

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.