APM80905KNBATR

Overview

The APM80905KNBATR is a synchronous buck LED driver module from Allegro MicroSystems, designed for automotive applications. It operates with an input voltage range of 4.5 V to 36 V, supporting a maximum supply voltage of 40 V. The device delivers up to 4 A of output current and features integrated PWM dimming capabilities. Packaged in a compact QFN format, it includes built-in monitoring functions suitable for Driver Monitoring Systems (DMS).

Feature Summary

• Integrated synchronous buck topology for high-efficiency power conversion.
• Built-in PWM dimming control for precise LED brightness adjustment.
• Includes monitoring functionality specifically tailored for safety-critical systems.
• Automotive-grade qualification ensuring reliability under harsh conditions.

Applications

• Driver Monitoring Systems (DMS) infrared LED driving
• Advanced Driver Assistance Systems (ADAS) illumination
• Automotive interior ambient lighting

Procurement Notes

Verify the specific suffix KNBATR against the manufacturer's latest datasheet to confirm package dimensions and tape-and-reel specifications. Ensure compatibility with your PCB footprint design, as the component utilizes a surface-mount QFN package. Cross-reference the part number with official Allegro MicroSystems documentation to validate current production status and any recent engineering change notices.

Selection Notes

Select this component when designing automotive DMS circuits requiring high current drive capability within a compact form factor. It is appropriate for applications needing integrated monitoring features alongside standard PWM dimming. Consider its 40 V absolute maximum rating when designing for 12 V or 24 V automotive electrical systems to ensure adequate headroom.

Part Context

This part belongs to the APM809xx series of automotive LED drivers. It complements other Allegro solutions like the APM80904 by offering higher current capacity. The series focuses on simplifying designs for safety-critical automotive electronics through high integration and robust performance standards.

Replacement Considerations

Check for direct substitutes within the APM809xx family, such as the APM80904KNBATR, noting differences in output current ratings. Verify pin-to-pin compatibility before substitution to avoid redesigning the PCB layout.

FAQ

What is the primary application for the APM80905KNBATR?

It is primarily designed for Driver Monitoring Systems (DMS) to drive infrared LEDs.

Does this IC support dimming?

Yes, it supports PWM dimming for controlling LED brightness.