SI8281BD-AS

Isolators - Gate Drivers Overview

The SI8281BD-AS is an automotive-grade, isolated Silicon Carbide (SiC) and IGBT gate driver manufactured by Skyworks Solutions. It integrates a high-voltage DC-DC converter to provide power isolation between the input and output stages. The device features a push-pull output topology with a peak output current of 4A. It offers a common-mode transient immunity (CMTI) of 125 kV/µs and includes a Miller clamp function to prevent false turn-on. The component operates within a temperature range of -40°C to 125°C and is housed in a 16-SOIC package.

Isolators - Gate Drivers Feature Summary

• Integrated high-voltage DC-DC converter for self-powered isolated operation
• Miller clamp functionality to suppress voltage spikes and prevent false triggering
• High common-mode transient immunity for reliable noise rejection
• Automotive qualification compliant with AEC-Q100 standards

Isolators - Gate Drivers Applications

• Driving Silicon Carbide (SiC) FETs in high-frequency power converters
• Gate driving for Insulated Gate Bipolar Transistors (IGBTs)
• Motor control systems requiring robust isolation
• Inverter circuits in electric vehicle powertrains

Isolators - Gate Drivers Procurement Notes

Verify the specific suffix 'AS' indicates automotive grade qualification and RoHS compliance. Confirm the package type matches the design requirements. Check for active status as availability may vary. Ensure the supplier provides valid origin documentation. Validate that the part meets the required environmental operating temperatures for the target application.

Isolators - Gate Drivers Selection Notes

Select this component when driving SiC or IGBT devices in automotive environments. The integrated DC-DC converter simplifies design by eliminating external isolated power supplies. High CMTI ensures stability in noisy switching environments. The Miller clamp adds protection against parasitic turn-on events. Verify that the 4A peak current capability meets the gate charge requirements of the target power switch.

Isolators - Gate Drivers Part Context

This device belongs to the Skyworks SI828x family of isolated gate drivers. These components utilize capacitive coupling technology for signal transmission across the isolation barrier. The family includes variants optimized for different voltage ratings and channel counts. The SI8281 series specifically targets high-performance industrial and automotive power conversion applications.

Isolators - Gate Drivers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.