SI83408BFA-IF

Overview

The SI83408BFA-IF is a four-channel isolated smart switch from Skyworks Solutions, designed for power distribution applications. It supports both high-side and low-side switching configurations with an output current of 700 mA and a current limit of 880 mA. The device features a maximum on-resistance of 155 mΩ, a maximum turn-on time of 2.5 μs, and a maximum blanking time of 3.5 μs. It operates with a logic supply voltage range of 2.25 V to 5.5 V and a switch supply voltage range of 9 V to 32 V. The component functions within a temperature range of -40°C to +125°C and is housed in a 32-DFN (9x9) package.

Feature Summary

• Integrates four independent channels with digital isolation for reliable signal transmission between control and power domains.
• Supports flexible high-side or low-side switching topologies to accommodate diverse circuit architectures.
• Includes fast update rates and programmable protection features such as overcurrent limiting and thermal shutdown.

Applications

• Industrial automation systems requiring isolated power control
• Automotive electronics and body control modules
• Telecommunications infrastructure power distribution

Procurement Notes

Verify the specific suffix IF against official Skyworks documentation to confirm pinout and packaging details. Ensure compatibility with system voltage requirements before integration. Check for RoHS compliance status in the latest datasheet revision. Confirm availability through authorized distributors to avoid counterfeit components. Validate thermal performance under maximum load conditions during design phase.

Selection Notes

Select this component when four isolated channels are required for high-side or low-side switching. Consider the 700 mA output current and 155 mΩ on-resistance for load matching. Evaluate the 9 V to 32 V switch supply range against system power rails. Verify that the 32-DFN package fits the PCB layout constraints. Compare turn-on times and protection features against alternative isolated switches.

Part Context

The SI83408BFA-IF belongs to the Si834xx family of isolated smart switches from Skyworks Solutions. This series provides integrated solutions for power distribution with digital isolation. Other variants in the family may differ in channel count, current ratings, or package types. The family targets applications needing robust isolation and compact form factors.

Replacement Considerations

Check Skyworks documentation for direct replacements within the Si834xx series. Verify pin-to-pin compatibility if substituting with other packages. Ensure electrical parameters like current limits and supply voltages match application requirements.

FAQ

Can the SI83408BFA-IF be used for both high-side and low-side switching?

Yes, the device supports both high-side and low-side switching configurations as documented in its specifications.

What is the maximum operating temperature for this component?

The maximum operating temperature is +125°C according to the official datasheet.