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SI83418AFA-IF
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Product Detailed Parameters
- Description：DGTL ISO 1.5KV 4CH SPI 32-VFDFN
- Series：Si834x
- Mfr：Skyworks Solutions Inc.
- Package：Tray
- Switch Type：General Purpose
- Number of Outputs：4
- Ratio - Input:Output：4 x 1:1
- Output Configuration：High Side
- Output Type：N-Channel
- Interface：Parallel, SPI
- Voltage - Load：9V ~ 32V
- Voltage - Supply (Vcc/Vdd)：2.25V ~ 5.5V
- Current - Output (Max)：700mA
- Rds On (Typ)：155mOhm
- Input Type：Non-Inverting
- Features：Slew Rate Controlled
- Fault Protection：Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Supplier Device Package：32-DFN (9x9)
- Package / Case：32-VFDFN Exposed Pad
- Grade：-
- Qualification：-
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Overview
The SI83418AFA-IF is a four-channel isolated smart switch from Skyworks Solutions, designed for power distribution applications. It operates with a control supply voltage of 2.25 V to 5.5 V and a load supply voltage of 9 V to 32 V. The device features a maximum on-resistance of 155 mOhms and an output current limit of 880 mA. It supports both sinking and sourcing configurations across its four outputs. The component functions within a temperature range of -40°C to +125°C and utilizes SPI or parallel interfaces for control.
Feature Summary
- Integrates four independent high-side and low-side switches in a single package
- Provides galvanic isolation between control logic and power loads
- Supports flexible sinking and sourcing output configurations
- Includes integrated protection against overcurrent and thermal events
Applications
- Industrial motor control systems
- Automotive body electronics distribution
- Smart relay replacement in industrial automation
- Power distribution units (PDUs) for infrastructure equipment
Procurement Notes
Verify the specific suffix IF against the manufacturer datasheet to confirm interface compatibility and pinout configuration. Ensure the selected variant matches the required isolation voltage ratings and operating temperature range for the target application environment. Cross-reference ordering information with official Skyworks documentation to avoid discrepancies in package type or electrical specifications.
Selection Notes
Select this component when a compact solution for multi-channel power switching with digital isolation is required. Consider the 155 mOhms on-resistance for efficiency calculations and the 880 mA current limit for load sizing. Evaluate the SPI versus parallel interface options based on system microcontroller capabilities and pin availability constraints.
Part Context
This part belongs to the Si83418 family of isolated smart switches. These devices are engineered to replace traditional mechanical relays and discrete transistor arrays. They offer reduced board space and improved reliability in power distribution networks where electrical isolation between control and power domains is critical for safety and noise immunity.
Replacement Considerations
Consult official Skyworks substitution guides for verified alternatives. Generic equivalents may not match the specific isolation characteristics or interface protocols.
