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SI83405BFA-IF
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Product Detailed Parameters
- Description：DGTL ISO 1.5KV 1CH SPI 32-VFDFN
- Series：Si834x
- Mfr：Skyworks Solutions Inc.
- Package：Tray
- Switch Type：General Purpose
- Number of Outputs：1
- Ratio - Input:Output：1:01
- 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)：2.5A
- Rds On (Typ)：41mOhm
- 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 SI83405BFA-IF is a four-channel isolated smart switch from Skyworks Solutions, designed for power distribution applications. It integrates high-side and low-side outputs with a continuous output current of 2.5 A per channel. The device features an on-resistance maximum of 155 mΩ and supports operating supply voltages ranging from 2.25 V to 5.5 V for logic and 9 V to 32 V for the load side. It operates within a temperature range of -40°C to +125°C and utilizes a 32-DFN (9x9) package.
Feature Summary
- Integrates four independent channels combining high-side and low-side switching capabilities in a single compact package.
- Provides electrical isolation between control inputs and power outputs to protect sensitive logic circuits.
- Includes integrated protection mechanisms such as overcurrent limiting and thermal shutdown for system reliability.
Applications
- Industrial automation power distribution modules
- Automotive electronic control unit (ECU) peripheral switching
- Telecommunications infrastructure power management
Procurement Notes
Verify the specific suffix 'BFA' against the manufacturer's latest datasheet to confirm pinout compatibility and electrical characteristics. Ensure the ordering information matches the required package type and tape-and-reel specifications for your assembly process. Cross-reference the RoHS status and humidity sensitivity level before procurement.
Selection Notes
Select this component when high current capacity per channel is required compared to standard 700 mA variants in the Si834xx family. The 32-DFN package offers a larger thermal dissipation area suitable for higher power loads. Confirm that the 2.5 A rating aligns with the specific load requirements of the application design.
Part Context
This part belongs to the Si834xx series of isolated smart switches, which are engineered for robust power distribution in harsh environments. The series provides various configurations of high-side and low-side switches with different current ratings and package options to suit diverse industrial and automotive needs.
Replacement Considerations
Check for direct substitutes within the Si834xx family, such as the SI83404 or SI83414 series, noting differences in current ratings and on-resistance. Verify pin-to-pin compatibility if replacing existing designs with other Skyworks isolated switch models.
