AS3642-ZWLT

Overview

The AS3642-ZWLT is a high-efficiency LED driver regulator manufactured by ams-OSRAM USA INC. It features a compact 13-WLCSP package with dimensions of 2.25x1.5 mm, designed for surface-mount installation. The device operates as a boost DC-DC converter with an internal switch, supporting two output channels. It accepts a supply voltage range from 2.7V to 4.4V and provides regulated output voltages between 2.8V and 5.5V. Each channel delivers up to 800mA of output current, specifically optimized for camera flash applications. The unit functions at a switching frequency of 4MHz and supports I²C dimming control. It is rated for operating temperatures ranging from -30°C to 85°C.

Feature Summary

• Compact 13-WLCSP package suitable for space-constrained mobile designs
• Dual-channel boost topology with integrated internal switch
• I²C interface for precise digital dimming control
• Optimized for high-current camera flash illumination

Applications

• Camera flash modules in smartphones
• Mobile device illumination systems
• Compact optical lighting solutions

Procurement Notes

Verify the specific suffix ZWLT against official datasheets to confirm package type and tape-and-reel specifications. Ensure compatibility with I²C bus requirements and thermal management constraints for the target application environment. Confirm RoHS compliance status through manufacturer documentation before integration.

Selection Notes

Select this component when designing mobile camera systems requiring high peak current in minimal footprint. The dual-channel capability allows independent control or parallel operation for increased brightness. Verify that the input voltage range aligns with the system battery profile and that the 4MHz frequency does not interfere with sensitive RF circuits.

Part Context

This part belongs to the AS364x series of LED drivers from ams-OSRAM, specialized for mobile photography. It complements other variants like the AS3647 by offering similar functionality in a standardized small outline package. The series addresses the industry demand for brighter flashes without increasing board space.

Replacement Considerations

Check for direct pin-compatible alternatives within the same product family. Verify electrical parameters such as output current limits and operating voltage ranges match the original design requirements before substitution.