SI83408BDA-IFR

Overview

The SI83408BDA-IFR is a four-channel isolated smart switch manufactured by Skyworks Solutions Inc. It integrates high-side and low-side power switches with digital isolation, designed for robust load control in industrial environments. The device supports an output current of 700 mA per channel with a maximum current limit of 880 mA. It operates within a supply voltage range of 2.25 V to 5.5 V for the logic side and 9 V to 32 V for the power side. Key timing parameters include a maximum on time of 2.5 µs and a maximum off time of 3.5 µs. The component features a maximum on-resistance of 155 mΩ and functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates four independent channels combining high-side and low-side switching capabilities with integrated digital isolation.

Applications

• Industrial automation systems requiring isolated load control
• Motor driver circuits needing precise switching management
• Power distribution units in harsh electromagnetic environments

Procurement Notes

Verify the specific suffix IF against official Skyworks documentation to confirm package type and tape-and-reel configuration. Ensure compatibility with your system's isolation voltage requirements and thermal management strategy. Cross-reference the datasheet for exact pinout definitions and recommended operating conditions before finalizing procurement specifications.

Selection Notes

Select this component when four-channel isolated switching is required with high current capacity. Consider the 155 mΩ on-resistance for efficiency calculations and the wide operating temperature range for environmental resilience. Verify that the 9 V to 32 V power supply range aligns with your load requirements and that the 700 mA output current meets the application's peak demands.

Part Context

This part belongs to the SI8340x family of isolated smart switches from Skyworks Solutions. These devices are engineered to provide reliable control of inductive and resistive loads while maintaining galvanic isolation between control and power domains. The family is commonly used in applications demanding high reliability and noise immunity in electrically noisy industrial settings.

Replacement Considerations

Consult official Skyworks substitution guides for verified alternatives. Generic replacements may not match the specific isolation characteristics or current limits. Ensure any substitute maintains the 32-DFN footprint and electrical performance specifications.

FAQ

What is the maximum current limit for each channel?

The maximum current limit for each channel is 880 mA.

What is the operating temperature range?

The device operates within a temperature range of -40°C to +125°C.