SI83418BFA-IFR

Overview

The SI83418BFA-IFR is a four-channel isolated smart switch from Skyworks Solutions, designed for power distribution applications. It integrates high-side and low-side N-channel switches with digital isolation. Key electrical parameters include a continuous output current of 700 mA per channel and a current limit of 880 mA. The device features a maximum on-resistance of 155 mOhms. Operating supply voltages range from 2.25 V to 5.5 V for the logic side and 9 V to 32 V for the power side. Switching characteristics include a maximum turn-on time of 2.7 µs and a maximum turn-off time of 2.7 µs. It operates within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates four independent isolated channels combining high-side and low-side switching capabilities in a single package.
• Provides robust digital isolation with high common-mode transient immunity to protect control circuitry from voltage spikes.
• Features integrated current limiting and thermal protection mechanisms to safeguard connected loads during fault conditions.

Applications

• Industrial motor control systems requiring isolated power switching
• Automotive electronic control units (ECUs) for load management
• Smart grid infrastructure and renewable energy inverters

Procurement Notes

Verify the specific suffix 'IFR' indicates reel packaging when ordering. Confirm that the 700 mA continuous current rating meets your load requirements. Ensure the 32-DFN footprint matches your PCB layout. Check for RoHS compliance status as required by your manufacturing standards. Validate the operating voltage ranges against your system design specifications before finalizing procurement.

Selection Notes

Select this component when four isolated channels are required in a compact form factor. The 155 mOhms on-resistance offers efficient power handling for moderate current loads. Consider the 2.7 µs switching speeds for applications requiring fast response times. The wide input voltage range supports various industrial and automotive bus architectures. Ensure the DFN package size fits within the available board space constraints.

Part Context

This part belongs to the Si834xx family of isolated smart switches. It complements other variants like the SI83418ADA and SI83408BFA by offering a pre-packaged solution for multi-channel power distribution. The family is designed to simplify system design by integrating isolation and switching functions.

Replacement Considerations

The SI83418BFA-IF is a non-reel variant of the same device. Verify pin compatibility if substituting between reel and tube packages. No direct functional substitutes are confirmed in the provided data.