AS3643-ZWLT

Overview

The AS3643-ZWLT is a DC-DC regulator IC designed for LED lighting applications. It features a step-up (boost) topology with two outputs and supports I2C dimming control. The device operates within an input voltage range of 2.7 V to 4.4 V and delivers up to 650 mA flash current. It is housed in a 13-WLCSP package measuring 2.25x1.5 mm, with a power dissipation rating of 1.23 W.

Feature Summary

• Integrates a boost converter topology for efficient LED driving
• Supports digital control via I2C interface for dimming functions
• Features dual output capability for complex lighting configurations

Applications

• LED lighting drivers
• Portable electronic devices requiring compact power regulation
• Automotive interior lighting systems

Procurement Notes

Verify the specific suffix variant required, as the base part number may have associated ordering codes like -500. Confirm component status, as some listings indicate End-of-Life notifications. Ensure compatibility with the target PCB footprint for the 13-WLCSP package during integration planning.

Selection Notes

Select this component when a small form factor is critical due to its WLCSP packaging. Consider the 650 mA output limit and 2.7-4.4 V input range against system requirements. Verify I2C bus compatibility with the host controller for dimming implementation.

Part Context

This component belongs to the ams-OSRAM LED driver portfolio, focusing on integrated power management solutions. It is manufactured by ams-OSRAM USA INC., a provider of light and sensor technologies. The device addresses the need for high-efficiency, space-constrained power regulation in modern electronic designs.

Replacement Considerations

Check for direct substitutes within the same product family or equivalent boost regulators from other manufacturers. Verify pinout compatibility and electrical specifications before substitution.