AS3691B-ZMFT

Overview

The AS3691B-ZMFT is a linear LED driver IC manufactured by ams-OSRAM USA INC. It features four independent output channels, each capable of sourcing up to 400 mA for RGB LED applications. The device is housed in a 64-pin VFQFN package with an exposed pad, measuring 9x9 mm. It operates within a temperature range of -20°C to 85°C (TA). This component is designed for high-performance backlight and lighting systems.

Feature Summary

• Four independent current source outputs for precise LED control
• Linear regulation architecture for stable performance
• High integration suitable for compact lighting designs

Applications

• RGB LED backlighting systems
• General illumination lighting drivers
• High-performance display backlight units

Procurement Notes

Verify the specific suffix ZMFT against official datasheets to confirm the 64-VFQFN package and operating temperature range. Confirm end-of-life status as some sources indicate discontinuation. Ensure compatibility with existing PCB footprints for the 9x9 mm QFN form factor before procurement.

Selection Notes

Select this component when four synchronized or independent 400 mA current sinks are required for RGB LED arrays. The linear topology suits applications where efficiency is secondary to simplicity and low noise. Verify thermal management requirements due to the power dissipation inherent in linear regulation at higher voltage differentials.

Part Context

This part belongs to the AS3691 series of LED drivers from ams-OSRAM. The series includes variants like the AS3691A, which shares similar functional characteristics but may differ in packaging or specific electrical ratings. These drivers are positioned within the company's portfolio for advanced lighting and display solutions.

Replacement Considerations

Check for direct substitutes within the AS3691 family, such as the AS3691A, ensuring pinout and package compatibility. No other public substitute part numbers are confirmed in available documentation.