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Skyworks Solutions Inc. SI83411BAA-IFR
- Part No.:
- SI83411BAA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83411BAA-IFR.pdf
- Description:
- 1 CH, ISOLATED SMART SWITCH, SIN
- Quantity:
- Payment:
- Shipping:
Inventory:3,544
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Product details
Overview
SI83411BAA-IFR from Skyworks Solutions is a single-channel isolated low-side smart switch with 2.5 A continuous current capability, 155 mΩ RON, and 1.5 kVRMS safety-rated galvanic isolation. It integrates overcurrent, overtemperature, and undervoltage protection, and supports industrial 9–32 V switch supply with 2.25–5.5 V logic interface-designed for driving solenoids and relays in PLC output modules.
For engineers reviewing the SI83411BAA-IFR datasheet, SI83411BAA-IFR pinout, SI83411BAA-IFR application, or SI83411BAA-IFR equivalent, key selection considerations include its sinking topology, parallel-only control interface, channel status indicators (LED1), low-voltage warning (VDD2_WRN), and absence of SPI diagnostics-making it suitable for optocoupler-replacement designs requiring fast, fault-aware load switching without serial configuration overhead.
Technical Context
The SI83411BAA-IFR implements a CMOS-based RF-isolated architecture with dedicated bidirectional isolation channels between logic and power domains. Its low-side switch uses a multi-voltage output clamp to handle unlimited demagnetization energy (EAS) while enabling fast turn-OFF for inductive loads.
Control is strictly parallel via dedicated input pins (A1) and asynchronous OE, with no SPI interface. Diagnostics are exposed through open-drain indicator pins-including LED1 for channel status and VDD2_WRN for switch supply undervoltage-without requiring host processor polling or register access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Type | Low-side sinking switch-connects load to GND2 when active; requires external high-side supply |
| Continuous Current | 2.5 A-supports heavy-duty solenoids and relay coils without external heatsinking at 125°C ambient |
| RON | 155 mΩ max-minimizes conduction loss and self-heating under full load |
| Isolation Rating | 1.5 kVRMS for 1 minute-meets UL 1577 and IEC 61131-2 requirements for industrial safety |
| Logic Supply Range | 2.25 V–5.5 V-interfacing directly with low-power MCUs including 2.5 V and 3.3 V systems |
| Switch Supply Range | 9 V–32 V-compatible with standard 24 V DC industrial control rails and brownout-tolerant operation |
| CMTI | >100 kV/µs-ensures robust noise immunity in electrically noisy factory environments |
| Operating Temp | −40°C to +125°C-qualified for extended use in unventilated control cabinets and outdoor enclosures |
Pinout & Package
SI83411BAA-IFR is housed in a compact 9 mm × 9 mm DFN-32 package with exposed thermal pad (EP) on underside for enhanced heat dissipation. Pin numbering follows standard DFN-32 counterclockwise convention starting from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Provides power to digital interface side; must be 2.25–5.5 V; internal UVLO at ~2.1 V |
| GND1 | Logic ground reference | Return path for VDD1 and all logic-level signals; isolated from GND2 by 1.5 kVRMS barrier |
| A1 | Channel input control | Active-high parallel enable signal; drives internal gate driver when OE = high |
| OE | Output enable | Asynchronous global enable; low disables all outputs regardless of A1 state |
| VDD2 | Switch supply input | Power source for output stage; 9–32 V range; monitored for undervoltage warning |
| GND2 | Power ground reference | Return path for VDD2 and load current; connects to load's low-side return node |
| B1 | Switch output terminal | Drains up to 2.5 A to GND2; features integrated clamp for inductive kickback handling |
| VDD2_WRN | Open-drain warning indicator | Active-low signal asserted when VDD2 drops below 9 V threshold; requires external pull-up |
| LED1 | Open-drain channel status indicator | Active-low reflects B1 output state-low when B1 is ON; enables direct LED feedback without MCU |
| FLT | Open-drain fault indicator | Active-low aggregate fault flag-asserted on overtemperature, overcurrent, or VDD2 failure |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic isolation barrier | CMOS-based RF isolation delivering >100 kV/µs CMTI and 1.5 kVRMS rating-replaces optocouplers with higher reliability and lifetime |
| Multi-voltage output clamp | Handles unlimited EAS during inductor demagnetization while maintaining fast turn-OFF-eliminates need for external flyback diodes |
| Parallel-only interface | No SPI required-simplifies firmware and PCB layout; ideal for legacy optocoupler drop-in replacement in space-constrained PLC modules |
| Dedicated indicator pins | VDD2_WRN, LED1, and FLT provide immediate hardware-level visibility into supply health, channel state, and fault conditions-no software polling needed |
| Comprehensive protection suite | Integrated overcurrent, overtemperature, and undervoltage monitoring with automatic shutdown-prevents damage during short-circuit or thermal overload events |
| Industrial temperature range | Rated for −40°C to +125°C operation-ensures stable performance in uncontrolled cabinet environments without derating |
Applications
| Programmable Logic Controller (PLC) Output Module | Industrial Motion Controller |
|---|---|
Use Scenario: Driving 24 V DC solenoid valves and contactor coils in modular I/O racks with strict safety and reliability requirements. IC Role / Device Role / Timing Role: Low-side switch providing isolated, protected load control with real-time status feedback via LED1 and FLT pins. Use Value: Eliminates discrete optocoupler + MOSFET combinations, reducing BOM count and board area while improving MTBF and EMI immunity. | Use Scenario: Controlling brake release circuits and auxiliary actuators in servo-driven motion systems where fast, fault-aware switching is critical. IC Role / Device Role / Timing Role: Isolated sink driver managing inductive loads with sub-10 µs update rate and built-in demagnetization clamp. Use Value: Prevents contact arcing and coil burnout during rapid stop/start cycles-extends actuator life and reduces maintenance downtime. |
| Smart Solid-State Relay (SSR) | Industrial Data Acquisition System |
Use Scenario: Replacing electromechanical relays in DIN-rail mounted SSRs used for HVAC zone control and pump sequencing. IC Role / Device Role / Timing Role: Single-channel isolated switch delivering 2.5 A continuous current with VDD2_WRN for supply health monitoring. Use Value: Enables silent, bounce-free switching with 10× longer lifetime than mechanical relays and no moving parts to wear out. | Use Scenario: Conditioning and isolating digital output signals from DAQ controllers to drive field devices like indicator lamps and alarm buzzers. IC Role / Device Role / Timing Role: Galvanically isolated interface translating logic-level commands into robust 24 V load control with diagnostic visibility. Use Value: Provides system-level fault detection (via FLT) and supply monitoring (VDD2_WRN) without adding microcontroller overhead or external comparators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-side isolated switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI83411BBA-IFR | Lacks LED1 channel status indicator; retains VDD2_WRN and FLT pins | Suitable where only aggregate fault and supply warning are needed-no per-channel visual feedback required | Select when board space or cost optimization favors removal of LED1 functionality without sacrificing core protection |
| SI83401BAA-IFR | High-side sourcing topology instead of low-side sinking; same 2.5 A/155 mΩ rating and package | Used when load must be connected to GND and switched on the high side-requires different PCB routing and load grounding scheme | Choose for applications where load common is grounded and power-side switching is preferred for safety or topology constraints |
Compared with SI83411BBA-IFR, SI83411BAA-IFR adds LED1 for direct channel-state visibility-critical for operator-facing panels-while SI83401BAA-IFR offers complementary high-side control but demands revised load interconnection and failsafe analysis.
Availability
SI83411BAA-IFR is available at Aetrix Electronics and suitable for programmable logic controllers, industrial motion controllers, and smart solid-state relays requiring stable component supply, long-term lifecycle support, and certified isolation performance.
Supply support for SI83411BAA-IFR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions for infrastructure, automotive, and industrial markets.
The Si834x family was developed specifically to replace optocoupler-based relay drivers in industrial control systems-delivering higher reliability, faster timing, and integrated diagnostics in a single IC with reinforced isolation.
FAQ
What is the maximum continuous current rating for SI83411BAA-IFR?
The SI83411BAA-IFR is rated for 2.5 A continuous output current at TA = 125°C with proper PCB thermal design. This rating applies to its single low-side switch (B1) and is supported by its 155 mΩ typical RON, which limits conduction loss and self-heating under sustained load conditions.
Does SI83411BAA-IFR support SPI communication for diagnostics?
No, SI83411BAA-IFR does not include SPI functionality. It belongs to the "Parallel-only" variant group (per Table 1 of the datasheet) and exposes diagnostics exclusively through hardware pins: LED1 for channel status, VDD2_WRN for switch supply warning, and FLT for aggregate fault indication.
What isolation voltage does SI83411BAA-IFR provide, and what standards does it meet?
SI83411BAA-IFR provides 1.5 kVRMS isolation rating for 1 minute and is UL 1577 recognized. It also meets CSA 62368-1 and CQC GB4943.1 safety requirements, and complies with IEC 61131-2 for industrial programmable controllers.
Can SI83411BAA-IFR drive inductive loads like solenoids safely?
Yes, SI83411BAA-IFR incorporates a unique multi-voltage output clamp that handles unlimited demagnetization energy (EAS) during inductive turn-OFF. This eliminates the need for external flyback diodes and ensures fast, arc-free switching-critical for solenoid and relay coil applications.
What is the function of the VDD2_WRN pin on SI83411BAA-IFR?
The VDD2_WRN pin is an open-drain, active-low indicator that asserts when the switch supply voltage (VDD2) falls below the 9 V undervoltage threshold. It requires an external pull-up resistor and provides immediate hardware-level notification of marginal or failing 24 V rail conditions-enabling early system response before fault shutdown.
SI83411BAA-IFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 32-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- SPI
- Isolated Power:
- Yes
- Number of Channels:
- 1
- Inputs - Side 1/Side 2:
- 1/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 1500Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- -
- Propagation Delay tpLH / tpHL (Max):
- 3.7µs, 3.7µs
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- -, 3µs
- Voltage - Supply:
- 2.25V ~ 5.5V, 9V ~ 32V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-DFN (9x9)
SI83411BAA-IFR FAQ
1.How can I place an order for SI83411BAA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83411BAA-IFR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI83411BAA-IFR reliable?
The price and inventory of SI83411BAA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83411BAA-IFR is usually 5 days.
3.What payment methods are accepted for SI83411BAA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83411BAA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83411BAA-IFR?
SI83411BAA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83411BAA-IFR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI83411BAA-IFR?
For technical support, including SI83411BAA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83411BAA-IFR requirements.
6.How does Aetrix verify that SI83411BAA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83411BAA-IFR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI83411BAA-IFR meets industry standards.
7.What is the process for return or replacement of SI83411BAA-IFR?
All SI83411BAA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83411BAA-IFR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI83411BAA-IFR part is unused and in its original packaging.
Return procedure for SI83411BAA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83411BAA-IFR Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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