AS3647-ZWLT

Overview

The AS3647-ZWLT is a DC-DC boost LED driver regulator designed for camera flash applications. It features an internal switch and delivers up to 800mA output current per channel across two channels. The device operates within a supply voltage range of 2.7V to 4.4V, with output voltages adjustable from 2.8V to 5.5V. It supports I²C dimming control and functions at a switching frequency of 4MHz. The component is housed in a compact 13-WLCSP (2.25x1.5) package and is rated for operation between -30°C and +85°C.

Feature Summary

• Integrates a boost converter topology with an internal power switch for efficient LED driving.
• Provides dual-channel output capability with independent regulation for camera flash systems.
• Supports digital control via I²C interface for precise brightness adjustment and configuration.

Applications

• Camera flash drivers
• Mobile device illumination
• Compact lighting systems

Procurement Notes

Verify the specific suffix 'ZWLT' against the manufacturer's official datasheet to confirm pinout and electrical specifications match your design requirements. Ensure the selected package variant aligns with your PCB footprint constraints. Confirm that the operating temperature range meets your environmental standards before finalizing procurement.

Selection Notes

Select this component when designing high-efficiency flash circuits requiring dual-channel control within a minimal board area. The integrated boost topology eliminates external inductors, simplifying layout. Ensure the input voltage source stays within the 2.7V to 4.4V range for stable operation. Verify I²C compatibility with the host microcontroller for proper dimming control implementation.

Part Context

This part belongs to the AS36xx series of LED drivers from ams OSRAM, specialized for mobile and camera applications. It represents a solution for integrating high-brightness LED management into space-constrained portable electronics. The WLCSP packaging allows for direct integration onto small form-factor boards typical in modern smartphones and compact cameras.

Replacement Considerations

Check the AS3630 series for single-channel alternatives or other variants within the AS36xx family if different channel counts are required. Verify pin-to-pin compatibility and electrical parameters with any potential substitutes using official cross-reference data.