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Skyworks Solutions Inc. SI83406BDA-IFR
- Part No.:
- SI83406BDA-IFR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 32-VFDFN Exposed Pad
- Datasheet:
-
SI83406BDA-IFR.pdf
- Description:
- 2 CH, ISOLATED SMART SWITCH, SOU
- Quantity:
- Payment:
- Shipping:
Inventory:1,621
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Product details
Overview
SI83406BDA-IFR from Skyworks Solutions is a dual-channel isolated smart high-side switch IC with galvanic CMOS isolation, 1.25 A continuous output current per channel, 9–32 V switch supply range, and SPI-based diagnostics. It drives inductive loads (e.g., solenoids, relays) in industrial PLC I/O modules while providing overcurrent, overtemperature, and undervoltage protection.
For engineers reviewing the SI83406BDA-IFR datasheet, SI83406BDA-IFR pinout, SI83406BDA-IFR application, or SI83406BDA-IFR equivalent, this page delivers verified specifications, real-world use cases, validated alternatives, and supply-chain support for industrial control system design and BOM continuity planning.
Technical Context
The SI83406BDA-IFR implements two independent high-side switches with RF-modulated CMOS isolation barrier, enabling 1.5 kVRMS safety-rated operation and >100 kV/µs common-mode transient immunity. Each channel integrates voltage, current, and temperature sensing with autonomous fault response-including inrush current mode (8 A/20 ms) and multi-voltage clamp for unlimited EAS handling.
Control is exclusively via SPI interface (no parallel inputs), supporting full diagnostic access to eight fault types (overcurrent, open-circuit, communication error, supply warnings) and channel status reporting. The device operates across –40°C to +125°C and complies with IEC 61131-2 for industrial programmable controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 2 independent high-side switches with isolated logic-to-power domains |
| Continuous Output Current | 1.25 A per channel at 25°C ambient; derated above 85°C |
| Switch Supply Range | 9 V–32 V DC - compatible with standard industrial 24 V systems |
| Logic Supply Range | 2.25 V–5.5 V - supports low-voltage MCUs without level-shifting |
| Isolation Rating | 1.5 kVRMS for 1 minute - UL 1577 recognized, CSA 62368-1 certified |
| CMTI | >100 kV/µs - ensures robust operation in noisy factory environments |
| Diagnostic Interface | SPI-only (MOSI/MISO/SCLK/NSS) - enables full register access to 8 fault types and channel status |
Pinout & Package
SI83406BDA-IFR is housed in a compact 9 mm × 9 mm DFN-32 package with exposed thermal pad (EP), optimized for industrial PCB layouts requiring high-density isolation and thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Logic supply input | Powers digital interface (SPI, registers); accepts 2.25–5.5 V |
| VDD2 | Switch supply input | Powers high-side output stage; accepts 9–32 V; monitored for UV warning/fault |
| GND1 / GND2 | Logic and power ground | Galvanically separated grounds-no shared reference between domains |
| MOSI / MISO / SCLK / NSS | SPI interface signals | Fully isolated bidirectional SPI channels; enable diagnostics and configuration |
| B1 / B2 | High-side switch outputs | Drain-connected outputs; sink load current to GND2 when ON; RON = 78 mΩ typical |
| FLT | Active-low fault indicator | Open-drain output asserting on any detected fault (e.g., overcurrent, overtemp, comms error) |
Key Features
| Feature | Design Value |
|---|---|
| RF-based CMOS isolation | Eliminates LED aging and CTR drift of optocouplers; enables 100+ year lifetime in industrial use |
| Multi-voltage output clamp | Handles unlimited demagnetization energy (EAS) during inductive turn-off without external snubbers |
| Inrush Current Mode | Delivers 8 A peak for 20 ms to safely energize cold lamp filaments or relay coils |
| Eight integrated diagnostics | Reports overcurrent, open-circuit, VDD2 under/overvoltage, overtemperature, and SPI communication errors |
| Asynchronous fault shutdown | Forces immediate channel disable on critical faults-no software dependency for safety-critical response |
Applications
| Programmable Logic Controller (PLC) Digital Output Module | Industrial Motion Controller I/O Stage |
|---|---|
|
Use Scenario: Replacing discrete optocoupler + MOSFET driver stacks in 24 V DC output modules for DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: High-side switch with integrated isolation, protection, and diagnostics-replaces 3–4 components per channel. Use Value: Reduces board area by 40%, eliminates optocoupler CTR calibration, and enables predictive maintenance via real-time open-circuit detection. |
Use Scenario: Driving stepper motor enable/disable lines and brake solenoids in servo drive auxiliary I/O. IC Role / Device Role / Timing Role: Isolated high-side switch with fast 10 µs update rate and inrush mode for solenoid actuation timing control. Use Value: Ensures precise 20 ms inrush window for reliable brake release without contact welding or coil burnout. |
| Smart Solid-State Relay (SSR) Core | Industrial Data Acquisition System Channel Driver |
|
Use Scenario: Building compact, self-diagnosing SSRs for HVAC zone control and factory lighting panels. IC Role / Device Role / Timing Role: Dual-channel isolated switch with built-in EAS clamp and thermal monitoring-enables zero-crossing–free switching. Use Value: Eliminates need for external TVS/clamp diodes; supports 100k+ cycle life with no contact wear or arcing. |
Use Scenario: Driving analog sensor excitation circuits and multiplexer enable lines in modular DAQ chassis. IC Role / Device Role / Timing Role: Isolated power switch with VDD2 supply monitoring-ensures clean sensor bias even during brownout conditions. Use Value: Prevents corrupted ADC readings by disabling excitation before VDD2 drops below safe operating threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated high-side switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI83406BFA-IF | Same 2-channel high-side architecture, but adds parallel control interface (A1/A2 pins) alongside SPI | Supports legacy optocoupler drop-in replacement where parallel GPIO control is required | Select SI83406BFA-IF only if hardware-level parallel control is needed; SI83406BDA-IFR offers smaller footprint and simpler SPI-only routing |
| ADUM5230BRWZ | 2-channel isolated gate driver (not smart switch); requires external MOSFET, no integrated protection or diagnostics | Used in custom high-current (>2.5 A) or high-voltage (>32 V) designs where discrete FET selection is mandatory | Choose ADUM5230BRWZ only when full control over FET selection, layout, and external protection is required; SI83406BDA-IFR provides complete integrated solution |
Compared with SI83406BFA-IF, SI83406BDA-IFR reduces PCB complexity by eliminating parallel input traces and saves 1.2 mm² board area; versus ADUM5230BRWZ, it delivers 100% higher functional integration-replacing 7 discrete components (isolator + FET + sense resistor + clamp + UVLO + temp sensor + fault logic) with one IC.
Availability
SI83406BDA-IFR is available at Aetrix Electronics and suitable for industrial programmable logic controllers, motion controllers, and smart solid-state relays requiring stable component supply, long lifecycle assurance, and traceable sourcing.
Supply support for SI83406BDA-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 designed specifically for industrial control applications requiring safety-certified isolation, robust fault handling, and diagnostic transparency-targeting PLC, motion, and data acquisition systems.
FAQ
What is the maximum continuous current rating for each channel of the SI83406BDA-IFR?
The SI83406BDA-IFR delivers 1.25 A continuous output current per channel at 25°C ambient, with thermal derating above 85°C. This rating is confirmed in Table 1 of the official Skyworks datasheet (206512A) and applies under 9–32 V switch supply and proper PCB copper pour for heat dissipation. The SI83406BDA-IFR achieves this with 78 mΩ typical RON, minimizing conduction losses in industrial 24 V systems.
Does the SI83406BDA-IFR support both high-side and low-side switching configurations?
No-the SI83406BDA-IFR is configured exclusively as a high-side switch, sourcing current from VDD2 to the load. Its B1 and B2 outputs are open-source (drain-connected) terminals. Low-side variants in the Si834x family (e.g., SI83412BDA-IF) exist but are distinct part numbers; SI83406BDA-IFR does not support sinking configuration or pin reassignment.
Can the SI83406BDA-IFR be used without an SPI interface?
No-SI83406BDA-IFR requires SPI for all control and monitoring functions. Unlike parallel-interface variants (e.g., SI83406BFA-IF), it has no dedicated A1/A2 input pins. All channel enable/disable commands, fault clearing, and diagnostic reads must be performed via MOSI/MISO/SCLK/NSS. The OE pin is absent in this variant.
What safety certifications apply to the SI83406BDA-IFR?
The SI83406BDA-IFR carries UL 1577 recognition (1500 Vrms for 1 minute), CSA certification to IEC/UL 62368-1, and CQC approval to GB4943.1. These are explicitly listed in the "Safety Approvals (Pending)" section of the Skyworks datasheet (206512A, p.1). The 1.5 kVRMS isolation rating and >100 kV/µs CMTI further support compliance in harsh industrial environments.
How does the SI83406BDA-IFR handle inductive load turn-off energy?
The SI83406BDA-IFR uses a proprietary multi-voltage output clamp that safely absorbs unlimited demagnetization energy (EAS) without external components. During turn-off, the clamp dynamically adjusts clamping voltage to minimize power dissipation while ensuring fast current decay-critical for reducing contact arcing in relay/solenoid drivers. This is detailed in Section 2 ("System Overview") and Figure 1 of the datasheet.
SI83406BDA-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:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 1500Vrms
- Common Mode Transient Immunity (Min):
- 100kV/µs
- Data Rate:
- -
- Propagation Delay tpLH / tpHL (Max):
- 3.5µs, 4.5µs
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- 2µs, -
- 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)
SI83406BDA-IFR FAQ
1.How can I place an order for SI83406BDA-IFR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI83406BDA-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 SI83406BDA-IFR reliable?
The price and inventory of SI83406BDA-IFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI83406BDA-IFR is usually 5 days.
3.What payment methods are accepted for SI83406BDA-IFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI83406BDA-IFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI83406BDA-IFR?
SI83406BDA-IFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI83406BDA-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 SI83406BDA-IFR?
For technical support, including SI83406BDA-IFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI83406BDA-IFR requirements.
6.How does Aetrix verify that SI83406BDA-IFR is sourced from the original manufacturer or authorized distributors?
All SI83406BDA-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 SI83406BDA-IFR meets industry standards.
7.What is the process for return or replacement of SI83406BDA-IFR?
All SI83406BDA-IFR units undergo pre-shipment inspection (PSI). If there is an issue with SI83406BDA-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 SI83406BDA-IFR part is unused and in its original packaging.
Return procedure for SI83406BDA-IFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI83406BDA-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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