MPQ7225A-AEC1 16CH Current Sink LED Driver QFN-32

MPQ7225A-AEC1 16CH Current Sink LED Driver QFN-32

Key Specifications

Features

• Scalability: o 16 Channels, 200mA (Max) per Channel o Cascade Up to 16 ICs /256 Channels o Pin-Configurable Device Address
• Designed for Automotive Applications: o Supports Up to 2.5V Cold Crank o -40°C to +150°C Operating Junction Temperature (TJ) FEATURES (continued)
• Cooler Thermals and Optimized Efficiency: o Adaptive Feedback Control (AFC) Dynamically Optimizes Pre-Regulator Output (300mV Headroom at 200mA) o Headroom Optimization for Multiple ICs
• Robust Communication: o 2Mbps CAN Compatible Differential Interface o 12-Bit Pulse-Width Modulation (PWM) Dimming or 6-Bit Analog Dimming for Each Channel
• Optimized EMI/EMC: o Configurable Phase Shift and Slew Rate o Frequency Spread Spectrum (FSS) (Internal Clock) o Selectable PWM Dimming Frequency o CISPR25 Class 5 Compliant
• Additional Features: o Functional Safety Document Available to Support System in Achieving ASIL Requirements o Failsafe (/FS) Pin and Fault Registers for System Protection and Diagnostics
• LED Short (to GND and Battery)
• LED Open
• Thermal Warning and Shutdown
• ISET Pin Open/Short

Typical Application Circuit

Applications

• Dynamic/Animated Tail Lights
• Adaptive Matrix Headlights
• Daytime Running Lights (DRLs)
• Turn Signals

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