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Skyworks Solutions Inc. SI8232AB-B-ISR
- Part No.:
- SI8232AB-B-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8232AB-B-ISR.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,698
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Product details
Overview
SI8232AB-B-ISR from Silicon Labs is a dual-channel isolated gate driver IC with 0.5 A peak output current per channel, 5 kVRMS input-to-output isolation (wide-body SOIC-16), 60 ns max propagation delay, and operation across –40 to +125 °C. It serves as a dual independent isolated driver in high-reliability motor control and isolated DC-DC power supply gate drive circuits.
For engineers reviewing the SI8232AB-B-ISR datasheet, SI8232AB-B-ISR pinout, SI8232AB-B-ISR application, or SI8232AB-B-ISR equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative parts with functional distinctions, and supply-chain-ready availability details - all grounded in Silicon Labs' official Si823x Rev. 1.5 documentation.
Technical Context
The SI8232AB-B-ISR implements two fully independent RF-modulated isolated channels using Silicon Labs' proprietary silicon isolation barrier, eliminating optocoupler latency and magnetic susceptibility. Each channel features TTL-compatible inputs with 400 mV hysteresis and operates without startup initialization or external clocking.
Unlike HS/LS variants (e.g., Si8230), the SI8232AB-B-ISR lacks overlap protection and programmable dead time - its truth table confirms immediate output transitions on input changes. It supports separate or common grounds on driver outputs and accepts VDDA/VDDB up to 24 V with UVLO thresholds at 5 V, 8 V, 10 V, or 12.5 V (configured via external resistor).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS (1 min, UL 1577); enables reinforced insulation in 600 VRMS mains-connected systems per IEC 60950-1/61010-1. |
| Peak Output Current | 0.5 A per channel (sink); sufficient to drive MOSFETs with Qg ≤ 25 nC at 350 kHz with 22 Ω gate resistor. |
| Propagation Delay | ≤60 ns (max); ensures precise timing alignment in high-frequency half-bridge and dual-switch topologies. |
| Common-Mode Transient Immunity | ≥45 kV/µs; maintains signal integrity during fast dV/dt events in motor drives and inverters. |
| Operating Temperature | –40 to +125 °C ambient; qualified per AEC-Q100 Grade 1, suitable for under-hood automotive and industrial environments. |
| Input Hysteresis | 400 mV; rejects noise on control lines without external Schmitt triggers in noisy EMI environments. |
| Supply Voltage Range | VDDI: 2.7–5.5 V; VDDA/VDDB: 6.5–24 V; supports flexible biasing from microcontroller logic rails and power-stage supplies. |
Pinout & Package
SI8232AB-B-ISR is housed in a RoHS-compliant wide-body SOIC-16 package (WBSOIC-16) with 8.0 mm creepage/clearance, rated for 5 kVRMS isolation. Pin functions are validated per Si823x Rev. 1.5, Section 5 ("Pin Descriptions").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Input-side terminals (GNDI, VDDI, VIA, VIB, DISABLE) | Isolated input domain: powers logic interface and receives control signals; DISABLE asserts low to force both outputs low. |
| 9, 10, 11, 12, 13, 14, 15, 16 | Output-side terminals (GNDA, VDDA, VOA, GNDB, VDDB, VOB) | Isolated driver domain: each channel has dedicated VDD/GND pair enabling split or shared ground configurations for gate drive. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated channels | Eliminates inter-channel crosstalk and enables asynchronous control of two separate power switches in phase-shifted or interleaved converters. |
| RF-based isolation architecture | Delivers 60 ns propagation delay and 45 kV/µs CMTI - outperforming optocouplers in speed and noise immunity without LED aging concerns. |
| TTL-compatible inputs with 400 mV hysteresis | Directly interfaces with MCU GPIOs and FPGA outputs without level-shifting or external hysteresis components. |
| Wide VDDA/VDDB range (6.5–24 V) | Supports gate drive for 12 V and 15 V logic-level MOSFETs and 20 V-rated IGBTs without external regulators. |
| AEC-Q100 Grade 1 qualification | Validated for automotive powertrain and body electronics where reliability over temperature and lifetime is critical. |
Applications
| Motor Control Systems | Isolated DC-DC Power Supplies |
|---|---|
Use Scenario: Driving high-side and low-side N-channel MOSFETs in 3-phase BLDC inverter stages for HVAC compressors. IC Role / Device Role / Timing Role: Dual isolated gate driver providing independent, noise-immune turn-on/turn-off control for upper and lower switches in each leg. Use Value: 60 ns propagation matching minimizes shoot-through risk; 5 kVRMS isolation meets IEC 61800-5-1 reinforced insulation requirements for motor drives. |
Use Scenario: Gate driving synchronous rectifiers and primary-side switches in isolated flyback or forward converters for telecom PSUs. IC Role / Device Role / Timing Role: Isolating control signals between primary-side controller and secondary-side synchronous rectifier drivers. Use Value: 45 kV/µs CMTI prevents false triggering during transformer leakage spikes; dual-channel independence enables asymmetric duty-cycle control. |
| Solar Inverters | Industrial PLC Output Modules |
Use Scenario: Driving half-bridge IGBTs in string-level MPPT converters with galvanic separation from system controller. IC Role / Device Role / Timing Role: Providing isolated gate drive for DC-link switching stages while maintaining safety isolation between PV array and grid interface. Use Value: 5 kVRMS rating satisfies IEC 62109-1 requirements for photovoltaic inverters; –40 to +125 °C operation supports outdoor enclosure mounting. |
Use Scenario: Isolating digital output signals from PLC CPU to 24 V DC field actuators in factory automation cabinets. IC Role / Device Role / Timing Role: Replacing optocouplers in solid-state relay driver stages with higher speed and longer lifetime. Use Value: 0.5 A sink capability directly drives small solenoids or indicator LEDs; dual-channel layout simplifies PCB routing for multi-channel modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8232AD-B-ISR | Same dual-driver function and 0.5 A rating, but rated for 2.5 kVRMS isolation (narrow-body SOIC-16) and lower CMTI (20 kV/µs min). | Targeted at non-safety-critical, space-constrained designs where 5 kVRMS is not mandated (e.g., internal DC-DC bias rails). | Select when board area is constrained and regulatory isolation voltage ≤ 2.5 kVRMS suffices; verify creepage/clearance compliance per IEC 60664-1. |
| ISO5852SMDWR | Texas Instruments part with 5.7 kVRMS isolation, 2.5 A peak output, and integrated Miller clamp; requires external dead-time control. | Preferred for high-current IGBT gate drive in industrial inverters where active Miller clamping improves robustness against parasitic turn-on. | Choose when >0.5 A drive strength or Miller clamping is required; note different pinout and absence of DISABLE functionality. |
Compared with Si8232AD-B-ISR, SI8232AB-B-ISR provides 2× higher isolation voltage and 2.25× higher CMTI - critical for mains-connected equipment. Versus ISO5852SMDWR, SI8232AB-B-ISR offers simpler integration (no Miller clamp configuration) and native DISABLE control, but lower drive strength.
Availability
SI8232AB-B-ISR is available at Aetrix Electronics and suitable for motor control systems, isolated DC-DC power supplies, and solar inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SI8232AB-B-ISR 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
Silicon Labs is a fabless semiconductor company specializing in precision timing, isolation, and mixed-signal ICs for industrial, automotive, and communications markets.
The Si823x family was designed to replace optocouplers in high-reliability gate drive applications, delivering superior speed, noise immunity, and lifetime stability through RF-based silicon isolation technology.
FAQ
What is the isolation voltage rating of the SI8232AB-B-ISR?
The SI8232AB-B-ISR is rated for 5 kVRMS input-to-output isolation per UL 1577 (1 minute test), validated in the wide-body SOIC-16 package. This rating supports reinforced insulation per IEC 60950-1 and IEC 61010-1 up to 600 VRMS working voltage, making it suitable for mains-connected power conversion systems. The isolation barrier is based on Silicon Labs' proprietary silicon-dielectric technology, not optocoupler-based construction.
Does the SI8232AB-B-ISR support programmable dead time?
No, the SI8232AB-B-ISR does not support programmable dead time or overlap protection. As confirmed in Table 9 of the Si823x datasheet, only HS/LS variants (Si8230/3/4) include these features. The SI8232AB-B-ISR is a dual-driver part with immediate output transitions - its truth table shows no internal dead time insertion, making it appropriate for applications requiring independent, asynchronous switching of two power devices.
What are the UVLO thresholds for VDDA and VDDB on the SI8232AB-B-ISR?
The SI8232AB-B-ISR supports selectable VDDA/VDDB undervoltage lockout (UVLO) thresholds: 5 V, 8 V, 10 V, or 12.5 V. The specific threshold is set by an external resistor connected to the DT pin, as detailed in Figures 37–40 of the datasheet. For example, a 100 kΩ resistor configures 900 ns programmed dead time and selects the 10 V UVLO threshold, ensuring gate drive is disabled if the driver supply drops below 9.6 V (min) during operation.
Can the SI8232AB-B-ISR drive both channels with separate ground references?
Yes, the SI8232AB-B-ISR supports fully independent ground references: GNDA and GNDB are electrically isolated and may be tied to separate potentials (e.g., different switch node voltages in a half-bridge). This is explicitly stated in the product description - "Driver outputs can be grounded to the same or separate grounds or connected to a positive or negative voltage." The isolation barrier ensures no current flows between GNDA and GNDB, enabling true floating gate drive.
Is the SI8232AB-B-ISR qualified for automotive applications?
Yes, the SI8232AB-B-ISR is AEC-Q100 Grade 1 qualified (–40 to +125 °C ambient), confirming its suitability for automotive powertrain and body electronics applications. This qualification covers stress testing for temperature cycling, humidity, ESD, and latch-up - validating reliability under harsh vehicle operating conditions. Its 5 kVRMS isolation and 45 kV/µs CMTI further support use in EV battery management and onboard chargers.
SI8232AB-B-ISR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 20kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 60ns, 60ns
- Pulse Width Distortion (Max):
- 5.6ns
- Rise / Fall Time (Typ):
- 20ns, 20ns (Max)
- Current - Output High, Low:
- 250mA, 500mA
- Current - Peak Output:
- 500mA
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 6.5V ~ 24V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
- Approval Agency:
- CQC, CSA, UR, VDE
SI8232AB-B-ISR FAQ
1.How can I place an order for SI8232AB-B-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8232AB-B-ISR 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 SI8232AB-B-ISR reliable?
The price and inventory of SI8232AB-B-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8232AB-B-ISR is usually 5 days.
3.What payment methods are accepted for SI8232AB-B-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8232AB-B-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8232AB-B-ISR?
SI8232AB-B-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8232AB-B-ISR 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 SI8232AB-B-ISR?
For technical support, including SI8232AB-B-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8232AB-B-ISR requirements.
6.How does Aetrix verify that SI8232AB-B-ISR is sourced from the original manufacturer or authorized distributors?
All SI8232AB-B-ISR 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 SI8232AB-B-ISR meets industry standards.
7.What is the process for return or replacement of SI8232AB-B-ISR?
All SI8232AB-B-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8232AB-B-ISR, 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 SI8232AB-B-ISR part is unused and in its original packaging.
Return procedure for SI8232AB-B-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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