MPQ7200A-AEC1 42V, 1.2A Buck-Boost or 3A Buck, 410kHz QFN-19

MPQ7200A-AEC1 42V, 1.2A Buck-Boost or 3A Buck, 410kHz QFN-19

The MPQ7200A is a fixed-frequency, constant current buck-boost LED driver with integrated power MOSFETs.

Key Specifications

Features

• 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
• Optimized for EMC/EMI: o Default 410kHz Switching Frequency (fSW) with Spread Spectrum o EMI Reduction Technique
• Full Protection Features: o LED Short (to GND and Battery), LED Open, and Output OVP with Fault Indication o OCP with Latch-Off Mode o Configurable Thermal Derating o Thermal Shutdown
• Fast Control Loop: o Band-Band Control

Typical Application Circuit

Applications

• Turn Indicator Lights
• Daytime Running Lights (DRLs)
• Fog Lights

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