SI8274DB4D-AS1R

Isolators - Gate Drivers Overview

The SI8274DB4D-AS1R is a single-channel galvanically isolated gate driver from Skyworks Solutions, packaged in a 16-SOIC surface-mount format. It features high common-mode transient immunity and an isolation voltage of 2.5 kVrms. The device supports PWM input with deglitching capabilities and includes under-voltage lockout (UVLO). Key electrical parameters include a maximum propagation delay of 105 ns, rise time of 16 ns, and fall time of 18 ns. It operates within a temperature range of -40°C to +125°C, draws 10 mA of supply current, and delivers a peak output current of 4 mA at 12 V. The component is AEC-Q100 qualified for automotive applications.

Isolators - Gate Drivers Feature Summary

• High common-mode transient immunity for reliable signal transmission in noisy environments
• Integrated deglitch filter to suppress spurious pulses on the PWM input
• Under-voltage lockout mechanism ensures safe operation during power transitions
• Automotive-grade qualification ensuring robustness in demanding thermal conditions

Isolators - Gate Drivers Applications

• Isolated gate driving for power switches in automotive inverters
• Motor control systems requiring high-speed digital isolation
• Industrial power conversion circuits with strict noise immunity needs
• High-frequency switching applications utilizing PWM signals

Isolators - Gate Drivers Procurement Notes

Verify that the specific suffix AS1R corresponds to the reel packaging variant rather than tube packaging when sourcing. Confirm that the AEC-Q100 qualification status meets your specific automotive reliability requirements. Ensure the SOIC-16 footprint matches your PCB design constraints. Check for any regional distribution restrictions or lead time variations associated with this automotive-grade part number before finalizing procurement plans.

Isolators - Gate Drivers Selection Notes

Select this component when a single-channel isolated driver with high CMTI is required for automotive or industrial environments. The 4 mA output current is suitable for driving smaller MOSFETs or IGBTs directly. Consider the 105 ns propagation delay for timing-sensitive applications. The wide operating temperature range makes it appropriate for harsh environments where standard commercial parts may fail. Evaluate the need for deglitching functionality if input noise is a concern.

Isolators - Gate Drivers Part Context

This part belongs to the Si8274 series of digital isolator gate drivers from Skyworks Solutions. The series offers various channel configurations and packaging options tailored for different isolation and drive strength requirements. The DB4D suffix indicates the specific package type and pin configuration, while AS1R denotes the automotive grade and reel packaging. This family is designed to replace traditional optocouplers in modern power electronics designs.

Isolators - Gate Drivers Replacement Considerations

Direct substitutes within the same series include SI8274GB4D-AS1R, which shares similar automotive qualifications and performance characteristics but may differ in specific ordering suffixes or packaging details. Verify pin compatibility and electrical specifications against the original datasheet before substitution. Other Skyworks isolator gate drivers may serve as alternatives if channel count or drive strength requirements differ.