SI83411BAA-IFR

Overview

The SI83411BAA-IFR is a single-channel isolated smart switch from Skyworks Solutions, designed for power distribution applications. It integrates a high-side N-channel MOSFET with an integrated digital isolator. The device supports a supply voltage range of 2.25 V to 32 V and delivers an output current of 2.5 A. Key electrical parameters include a maximum on-resistance of 70 mΩ and a current limit of 3.5 A. Switching characteristics feature a maximum turn-on time of 2.3 µs and a maximum turn-off time of 2.9 µs. It operates within a temperature range of -40°C to +125°C and is housed in a 32-pin DFN (9x9 mm) package.

Feature Summary

• Integrates a high-side N-channel power switch with a robust digital isolator for galvanic isolation between control and load sides.
• Provides comprehensive protection mechanisms including overcurrent limiting, thermal shutdown, and reverse battery protection.
• Features active clamping to prevent false turn-on events caused by rapid common-mode transients.
• Includes diagnostic outputs for fault indication and channel status monitoring.

Applications

• Industrial motor control systems requiring isolated switching
• Automotive body electronics and lighting distribution
• Programmable logic controller (PLC) output modules
• Power distribution units in telecommunications infrastructure

Procurement Notes

Verify the specific suffix 'IFR' corresponds to the reel packaging configuration as indicated by manufacturer data sheets. Confirm that the 32-DFN (9x9 mm) footprint matches the target PCB layout dimensions. Ensure compatibility with the required isolation voltage ratings for the specific application environment before finalizing procurement specifications.

Selection Notes

Select this component when a single-channel solution with high current capability (2.5 A) is required. The integrated isolator eliminates the need for external transformer-based isolation components. Consider the 70 mΩ on-resistance for efficiency calculations. Verify that the 32-pin package size fits within the available board space constraints compared to smaller alternative packages.

Part Context

This part belongs to the Si834xx family of isolated smart switches. It offers a simplified design path for engineers needing reliable power switching with built-in safety features. The integration of the isolator reduces bill-of-materials count and assembly complexity compared to discrete solutions using separate switches and isolators.

Replacement Considerations

Check datasheets for pin-compatible alternatives within the Si834xx series. Verify if multi-channel variants or different current ratings better suit the system requirements. Ensure any substitute maintains the same isolation voltage class and package dimensions for direct replacement.

FAQ

What is the maximum operating supply voltage for the SI83411BAA-IFR?

The device supports a supply voltage range from 2.25 V up to 32 V.

Does the SI83411BAA-IFR include reverse battery protection?

Yes, the device incorporates reverse battery protection to safeguard the load and switch during incorrect polarity connections.

What type of output stage does this smart switch utilize?

It utilizes a high-side N-channel MOSFET output stage for sinking current to the load.