SI8273GB-AS1R

Isolators - Gate Drivers Overview

The SI8273GB-AS1R is a single-channel automotive-grade digital isolator gate driver manufactured by Skyworks Solutions. It features a SOIC-16 surface-mount package and supports high-side and low-side configurations. The device provides galvanic isolation with an insulation voltage of 2.5 kVrms. Key electrical parameters include a maximum propagation delay of 75 ns, rise time of 16 ns, and fall time of 18 ns. It operates within a temperature range of -40°C to +125°C, dissipates up to 1.2 W of power, and draws 10 mA of supply current. The output current capability is 4 mA.

Isolators - Gate Drivers Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle applications.
• High common-mode transient immunity (CMTI) ensures signal integrity in noisy environments.
• Integrated undervoltage lockout (UVLO) protects against improper operation during low supply conditions.

Isolators - Gate Drivers Applications

• Automotive motor control systems
• Inverter gate driving circuits
• High-voltage isolated power supplies

Isolators - Gate Drivers Procurement Notes

Verify the specific suffix AS1R confirms the reel packaging format and automotive grade designation. Ensure the SOIC-16 footprint matches the target PCB layout. Confirm that the 2.5 kVrms isolation rating meets the safety requirements of the final application. Cross-reference the AEC-Q100 certification status if strict automotive compliance documentation is required for the bill of materials.

Isolators - Gate Drivers Selection Notes

Select this component when high-speed switching with minimal latency is required for automotive power electronics. The single-channel configuration suits half-bridge topologies where separate drivers are not needed. Consider the 4 mA output current limit for driving smaller MOSFETs or IGBTs. The wide operating temperature range allows deployment in harsh under-hood environments without derating concerns.

Isolators - Gate Drivers Part Context

This part belongs to the Si8273 series of digital isolators designed for robust performance in electric and hybrid vehicles. It utilizes capacitive coupling technology to provide isolation between control logic and power stages. The series emphasizes low skew and high CMTI to maintain precise timing in high-frequency switching applications.

Isolators - Gate Drivers Replacement Considerations

Direct substitutes may include other Skyworks Si827x variants with different channel counts or packaging options. Verify pin compatibility before replacing with non-Skyworks alternatives. Check datasheets for matching isolation voltage and CMTI specifications to ensure equivalent noise immunity.