SI82391AD-IS3R

Isolators - Gate Drivers Overview

The SI82391AD-IS3R is a dual-channel galvanically isolated gate driver from the Si8239x series, manufactured by Skyworks Solutions. It features a 3250 Vrms isolation voltage and operates within a temperature range of -40°C to +125°C. The device provides non-inverting logic with a maximum propagation delay of 40 ns, rise time of 12 ns, and fall time of 12 ns. It delivers a peak output current of 4 A and includes a 6 V Under-Voltage Lockout (UVLO). Powered by a 3.3 V supply, it consumes 7.2 mA of operating current and dissipates up to 2.1 W. The component is housed in a 14-SOIC package and is qualified under AEC-Q100 standards for automotive reliability.

Isolators - Gate Drivers Feature Summary

• Provides high electromagnetic immunity suitable for industrial environments
• Features capacitive coupling technology for galvanic isolation
• Includes integrated under-voltage lockout protection

Isolators - Gate Drivers Applications

• Industrial motor control systems
• Automotive power electronics
• High-frequency switching power supplies

Isolators - Gate Drivers Procurement Notes

Verify the specific suffix IS3R indicates tape-and-reel packaging when sourcing components. Confirm that the 6 V UVLO threshold aligns with the target gate drive requirements. Ensure the SOIC-Wide-14 footprint matches the PCB layout design. Check for RoHS compliance documentation as required by regional regulations. Validate the AEC-Q100 qualification status if the application demands automotive-grade reliability standards.

Isolators - Gate Drivers Selection Notes

Select this component for applications requiring robust isolation between control and power stages. The dual-channel configuration supports half-bridge or full-bridge topologies efficiently. Consider the 4 A output capability for driving medium-power MOSFETs or IGBTs. The wide operating temperature range ensures stability in harsh thermal conditions. Verify input voltage compatibility with standard TTL logic levels before integration.

Isolators - Gate Drivers Part Context

This part belongs to the Si8239x family of isolated gate drivers, which utilizes Skyworks' proprietary capacitive isolation technology. The family offers various insulation voltages and UVLO configurations to suit different power management needs. The SI82391 variant specifically targets applications requiring a 6 V UVLO threshold. The series is designed to replace traditional optocouplers in modern power conversion circuits.

Isolators - Gate Drivers Replacement Considerations

Check datasheets for equivalent parts offering similar 3250 Vrms isolation and 4 A drive strength. Verify pin-to-pin compatibility with the 14-SOIC package before substitution. Ensure the replacement maintains the same non-inverting logic configuration and propagation delay characteristics.