AS3674-ZWLT-500

Overview

The AS3674-ZWLT-500 is a high-efficiency, synchronous step-down DC/DC converter designed for LED lighting applications. It integrates two independent buck converters to drive dual-channel LED strings from a single input source. The device supports wide input voltage ranges and offers programmable output currents with high accuracy. Key features include integrated power switches, thermal regulation, and comprehensive protection mechanisms such as over-voltage, over-current, and short-circuit protection. It operates within an industrial temperature range and utilizes a compact QFN package for space-constrained designs.

Feature Summary

• Dual independent synchronous buck channels for flexible LED string configuration
• Integrated high-side and low-side power MOSFETs for enhanced efficiency
• Programmable current control with precise dimming capabilities via analog or PWM interfaces
• Built-in thermal shutdown and fault protection for reliable operation

Applications

• Automotive interior and exterior LED lighting modules
• General solid-state lighting (SSL) fixtures
• Industrial LED panel illumination
• Architectural accent lighting systems

Procurement Notes

Verify the specific suffix codes against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure that the ordering information matches the exact package variant and temperature grade required for your design. Cross-reference the component marking code with the latest production documentation to avoid counterfeit parts. Confirm RoHS compliance status through the official product change notification records.

Selection Notes

Select this component when designing multi-string LED drivers requiring independent channel control from a single power rail. Evaluate the input voltage range against your system's supply characteristics to ensure stable operation. Consider the thermal performance of the QFN package in relation to your enclosure's heat dissipation capabilities. Verify that the required dimming resolution and frequency align with the controller's internal oscillator and interface specifications.

Part Context

This part belongs to the AS367x family of LED drivers developed by ams OSRAM. These devices are engineered specifically for automotive and general lighting markets where high reliability and efficiency are critical. The series typically includes variants with different channel counts and control interfaces, sharing common architectural benefits like integrated power stages and advanced protection features.

Replacement Considerations

Consult the manufacturer's official substitution guide for verified alternative part numbers. Direct replacements must match the pinout, electrical ratings, and functional interface. Generic equivalents may require schematic modifications and should be validated through rigorous testing before implementation.