SI83402BAA-IF

Overview

The SI83402BAA-IF is a dual-channel isolated smart switch IC designed for power distribution applications. It integrates two high-side and two low-side N-channel switches, supporting up to 1.25A per channel. The device operates with a control voltage range of 2.25V to 5.5V and a load voltage range of 9V to 32V. Key electrical parameters include an on-resistance of 155 mOhms maximum and a current limit of 880 mA. It features turn-on and turn-off times of 2.7 us and 2.5 us respectively, with a maximum dead time of 3.5 us. The component functions within a temperature range of -40°C to +125°C and utilizes a 32-pin DFN package.

Feature Summary

• Integrates four independent power switches (two high-side, two low-side) in a single compact package
• Provides galvanic isolation between control logic and power load domains
• Includes integrated protection mechanisms such as current limiting and thermal shutdown
• Supports parallel operation for increased current handling capability

Applications

• Industrial motor control systems requiring isolated switching
• Power distribution units in automation equipment
• Isolated gate driver interfaces for power transistors
• Smart relay replacements in harsh environments

Procurement Notes

Verify the specific suffix IF against the manufacturer's latest datasheet to confirm pinout and packaging details. Ensure compatibility with your system's isolation voltage requirements and thermal management strategy. Cross-reference the 32-DFN footprint with your PCB design library. Confirm that the 1.25A continuous current rating meets your peak load demands without exceeding thermal limits under worst-case operating conditions.

Selection Notes

Select this component when dual-channel isolated switching is required with moderate current capabilities. Compare the 155 mOhms on-resistance against alternative devices to evaluate conduction losses. Consider the 32-pin DFN package size constraints relative to available board space. Verify that the 9V to 32V load voltage range aligns with your system's power supply architecture and that the control interface matches your microcontroller or PLC output levels.

Part Context

This part belongs to the Si834xx family of isolated smart switches from Skyworks Solutions. These components are engineered to replace traditional discrete MOSFET drivers and protection circuits. The series offers varying channel counts and current ratings to suit different power distribution needs. The SI83402BAA-IF specifically targets applications needing two fully isolated channels with integrated fault protection.

Replacement Considerations

Check for direct substitutes like the SI83418AFA-IF for quad-channel requirements. Verify pin-to-pin compatibility with other Si834xx variants before substitution. Ensure replacement parts maintain the same isolation voltage ratings and package dimensions.