AS3688

Overview

The AS3688 is a DC-DC LED driver IC manufactured by ams-OSRAM, designed for mobile backlight and camera flash applications. It utilizes boost and switched-capacitor (charge pump) topology to regulate current. The device features nine independent output channels, each capable of delivering up to 900mA in flash mode. It operates with a supply voltage range from 25V minimum to unspecified maximum, supporting output voltages up to 25V. Packaged in a 32-VFQFN exposed pad (32-QFN 5x5) surface-mount format, it integrates internal switching elements without external power switches.

Feature Summary

• Integrates boost and charge pump topologies for efficient LED driving
• Provides nine independent regulated output channels
• Supports high-current flash operation modes
• Designed for compact surface-mount integration

Applications

• Mobile device backlighting
• Camera flash illumination

Procurement Notes

Verify component status as the AS3688 series is listed as obsolete or discontinued in available distributor records. Confirm availability of alternative sources or last-time-buy options if procurement is required. Ensure compatibility with existing PCB footprints and design-in constraints before finalizing sourcing decisions.

Selection Notes

Select this component for designs requiring multi-channel LED control with integrated power management. Consider the 32-QFN package size for space-constrained mobile applications. Evaluate thermal performance due to the exposed pad design and ensure adequate layout for high-current paths.

Part Context

The AS3688 belongs to the AS3688 series of LED drivers from ams-OSRAM. It is part of their portfolio for mobile and wearable electronics, focusing on high-efficiency power conversion for lighting applications. The basic product number remains AS3688 across variants.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material. Consult manufacturer documentation for direct replacements or cross-reference guides.