AL1672-40CSP-13

Overview

The AL1672-40CSP-13 is a single-stage dimmable buck converter LED driver from Diodes Incorporated. It operates with an input voltage range of 85 VAC to 277 VAC and delivers a constant output current of 4 A. The device supports a maximum output voltage of 650 V and functions at a switching frequency of 200 kHz. It is housed in an 8-pin SOIC package with an exposed pad (SO-8EP) and is rated for operation between -40°C and +105°C.

Feature Summary

• Integrates power factor correction and constant current regulation in a single stage
• Supports PWM and analog dimming capabilities for offline high brightness LED applications
• Includes built-in short circuit and thermal protection mechanisms

Applications

• Offline high brightness LED lighting systems
• General illumination drivers requiring power factor correction
• LED strings driven by single-stage AC-DC conversion

Procurement Notes

Verify the specific suffix 'CSP' against the manufacturer's latest documentation to confirm pinout and thermal pad specifications. Confirm RoHS compliance status directly with Diodes Incorporated as regulatory data may vary by production batch. Ensure the SO-8EP package footprint matches the PCB design requirements for adequate thermal dissipation under the exposed pad area.

Selection Notes

Select this component for designs requiring integrated PFC and constant current control without external controllers. The 4 A output capability suits medium-power LED arrays. Verify that the 200 kHz switching frequency aligns with EMI constraints. Ensure the input voltage range covers the local mains supply variations. Check thermal management requirements given the 800 mW power dissipation rating.

Part Context

This part belongs to the AL1672 series of single-stage dimmable buck converters. It is designed for cost-effective solutions in offline LED applications. The series provides a compact alternative to multi-stage driver architectures. The exposed pad package facilitates heat transfer to the PCB ground plane.

Replacement Considerations

The AL1676-40DS7-13 is a related device in the same family offering similar functionality but in a different SO-7 package. Verify pin compatibility and thermal performance differences before substitution.