MPQ3621-AEC1 50mA, 48CH Current Source LED Driver QFN-68

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MPQ3621-AEC1 50mA, 48CH Current Source LED Driver QFN-68

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pMPS MPQ3621-AEC1 — Current Source LED Driver, 50 mA output, 48 channels, QFN-68, AEC-Q100./p

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Automotive AEC-Q100 MPS LED Drivers LED Power Management QFN-68

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MPQ3621-AEC1 50mA, 48CH Current Source LED Driver QFN-68

The MPS MPQ3621-AEC1 is a Current Source LED Driver. It is rated for 50 mA and drives 48 LED strings. It is supplied in a QFN-68 package. The part is AEC-Q100 qualified.

The MPQ3621 is a 48-channel LED driver with a 12V voltage rating and maximum 50mA current sources.

Key Specifications

Part Number	MPQ3621-AEC1
Function	Current Source LED Driver
Current Rating	50 mA
Channels	48
Interface	SPI
Package	QFN-68
Qualification	AEC-Q100
Ordering Codes	MPQ3621-AEC1

Features

48 Internal Channels with Max 50mA per Channel
12V Voltage Rating
Low-Dropout Voltage (250mV at 30mA)
Independent 16-Bit Pulse-Width Modulation (PWM) Dimming
Independent 7-Bit Analog Dimming
Adaptive Voltage Feedback Function
25MHz Serial Interface
Supports Daisy Chain for Multiple ICs
Improve EMI with LED Current (ILEDx, where x = 1–48) Slew Rate and Phase Shift
LED Short Protection

Typical Application Circuit

Applications

Automotive Cluster LCDs
Automotive Center Information LCDs

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.