MPQ7232-AEC1 4.5-36V, 6A, 2.25MHz Synchronous Buck Infrared LED Driver QFN-15

MPQ7232-AEC1 4.5-36V, 6A, 2.25MHz Synchronous Buck Infrared LED Driver QFN-15

The MPQ7232 is a synchronous, step-down, constant-current, infrared (IR) LED driver.

Key Specifications

Features

• Designed for Automotive Applications o 4.5V to 36V Input Voltage (VIN) Range o -40°C to +150°C Junction Temperature (TJ) Rating
• Improved Efficiency and Thermals o 45mΩ/30mΩ On Resistance (RDS(ON)) Internal MOSFETs o High-Efficiency Synchronous Driver
• Optimized for EMC and EMI o 2.25MHz Switching Frequency (fSW) o Frequency Spread Spectrum (FSS)
• Full Protection Features o Fault Indication for LED Short to GND, Open o Thermal Shutdown (TSD)
• Additional Features o Available in a QFN-15 (3mmx4mm) Package with Wettable Flanks o Available in AEC-Q100 Grade 1

Typical Application Circuit

Applications

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

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