MPQ7230-AEC1 6-42V, 1.2A Synchronous Buck-Boost or 3A Buck Automotive Infrared LED Driver QFN-19

MPQ7230-AEC1 6-42V, 1.2A Synchronous Buck-Boost or 3A Buck Automotive Infrared LED Driver QFN-19

The MPQ7230 is a fixed-frequency, constant current buck-boost LED driver with integrated power MOSFETs.

Key Specifications

Features

• Built for a Wide Range of IR LED Applications: o Wide 6V to 42V Operating Input Range o 10Hz to 2kHz PWM Dimming Frequency o Compatible with 30FPS, 60FPS, and 120FPS Dimming
• High Performance for Improved Thermals: o Configurable LED Current without Sensing Resistor o 44mΩ/40mΩ Low RDS(ON) Internal Power MOSFETs o High-Efficiency Synchronous Mode Operation
• Optimized for EMC/EMI: o Default 410kHz fSW with Spread Spectrum o EMI Reduction Technique

Typical Application Circuit

Applications

• Infrared (IR) LED Drivers for Driver Monitoring Systems (DMS)
• Infrared (IR) Illumination for Automotive Cameras

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