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Skyworks Solutions Inc. SI8231AD-B-ISR
- Part No.:
- SI8231AD-B-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8231AD-B-ISR.pdf
- Description:
- DGTL ISO 5KV 2CH GATE DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,769
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Product details
Overview
SI8231AD-B-ISR from Silicon Labs is a 0.5 A peak-output, high-side/low-side isolated gate driver with PWM input configuration, 5 kVRMS input-to-output isolation, 60 ns max propagation delay, and programmable dead time - designed for IGBT/MOSFET half-bridge control in solar inverters and industrial motor drives.
For engineers reviewing the SI8231AD-B-ISR datasheet, SI8231AD-B-ISR pinout, SI8231AD-B-ISR application, or SI8231AD-B-ISR equivalent, this page delivers verified specifications, safety-certified isolation performance, thermal derating data, overlap protection logic, and direct alternatives for high-reliability power stage design.
Technical Context
The SI8231AD-B-ISR implements RF-based on/off keying across a silicon isolation barrier to deliver robust noise immunity and fast signal transfer without startup initialization. Its single PWM input controls both high-side and low-side outputs with internal overlap protection and externally programmable dead time via resistor.
It features dual independent isolated supply domains (VDDI for input side; VDDA/VDDB for output side), TTL-compatible input with 400 mV hysteresis, and undervoltage lockout on all three supplies - enabling safe operation in 12–24 V gate drive systems up to 125 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 0.5 A sink / 0.25 A source per channel - sufficient for driving medium-power IGBTs and MOSFETs in <1 kW inverters. |
| Isolation Rating | 5 kVRMS (UL 1577), 891 Vpeak working voltage (IEC 60747-5-5) - certified for reinforced insulation in industrial and solar applications. |
| Propagation Delay | 30–60 ns (max) - enables >1 MHz switching with precise timing control in high-frequency converters. |
| Common-Mode Transient Immunity | ≥45 kV/µs - ensures reliable operation in noisy motor drive and inverter environments with fast dV/dt transients. |
| Operating Temperature | –40 to +125 °C - supports under-hood automotive auxiliary systems and industrial variable-frequency drives. |
| Dead Time Programmability | 70–900 ns range via external resistor - allows fine-tuned optimization of shoot-through prevention without firmware changes. |
| Input Hysteresis | 400 mV - rejects noise on PWM signals in electrically harsh environments without external Schmitt triggers. |
Pinout & Package
SI8231AD-B-ISR is housed in a RoHS-compliant SOIC-16 wide-body package (WBSOIC-16) with 8.0 mm creepage/clearance, optimized for high-voltage isolation integrity.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Input-side terminals (GNDI, VDDI, PWM, DISABLE) | Isolated input domain: powers logic side, accepts PWM control, enables/disable function, referenced to GNDI. |
| 9, 10, 11, 12, 13, 14, 15, 16 | Output-side terminals (GNDA, VDDA, VOA, GNDB, VDDB, VOB) | Isolated output domain: dual independent gate drive supplies and outputs for high-side (VOA) and low-side (VOB) switches. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable dead time | Adjustable 70–900 ns via single external resistor - eliminates need for MCU-based dead-time insertion and reduces layout complexity. |
| Overlap protection | Hardware-enforced prevention of simultaneous high-side/low-side conduction - avoids shoot-through failure without software intervention. |
| RF isolation architecture | Silicon-based RF modulation instead of optocoupler LED - delivers stable performance over temperature and lifetime, no LED aging drift. |
| AEC-Q100 qualified | Grade 1 (–40 to +125 °C) qualification - validated for automotive powertrain auxiliary systems and EV charging interfaces. |
| Transient immunity | 45 kV/µs CMTI - maintains signal integrity during fast-switching events in SiC/GaN-based inverters and motor drives. |
Applications
| Solar Inverters | Industrial Motor Drives |
|---|---|
Use Scenario: Half-bridge IGBT control in string inverters with 600–1000 V DC bus. IC Role / Device Role / Timing Role: Isolated PWM-to-gate driver with programmable dead time and overlap protection. Use Value: Enables 100 kHz+ switching with <60 ns timing skew, reducing filter size and improving MPPT efficiency. |
Use Scenario: Three-phase VFD output stage using discrete IGBT modules. IC Role / Device Role / Timing Role: High-side/low-side gate driver with independent output supplies and UVLO monitoring. Use Value: Prevents shoot-through under transient load conditions while supporting 125 °C junction operation. |
| EV Onboard Chargers | Plasma Display Power Supplies |
Use Scenario: AC/DC PFC and DC/DC isolation stages in bidirectional OBC designs. IC Role / Device Role / Timing Role: Isolated gate driver for interleaved totem-pole PFC and LLC resonant converter switches. Use Value: 5 kVRMS isolation meets reinforced insulation requirements for 400 V battery systems and grid interface safety. |
Use Scenario: High-voltage sustain and scan drivers in AC plasma display panels. IC Role / Device Role / Timing Role: Dual isolated driver delivering synchronized high-voltage pulses to electrode arrays. Use Value: 1500 VDC peak driver-to-driver differential voltage rating supports ±300 V sustain waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side/low-side isolated gate drive applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8231BD-B-ISR | Same pinout and specs, but 2.5 kVRMS isolation rating (NBSOIC-16 package) vs. 5 kVRMS in SI8231AD-B-ISR. | Approved for lower working voltage systems (<300 VRMS reinforced insulation); not suitable for 600 V+ solar or industrial mains-connected designs. | Select only when regulatory requirements permit reduced isolation - e.g., secondary-side DC/DC control where primary isolation is handled elsewhere. |
| UCC21520DW | Ti's dual-channel isolated driver with 4 A peak output, 5.7 kVRMS isolation, and integrated Miller clamp - differs in current capability and protection features. | Targets higher-power motor drives and traction inverters requiring >2 A gate drive; lacks programmable dead time (uses fixed internal delay). | Choose when higher drive strength and Miller clamping are required; avoid if dead-time tuning or cost-sensitive 0.5 A applications are priority. |
Compared with Si8231BD-B-ISR, SI8231AD-B-ISR provides 2× higher isolation voltage for primary-side gate drive in grid-tied systems; versus UCC21520DW, it offers finer dead-time control at lower cost and current, making it optimal for sub-1 kW solar and industrial inverters.
Availability
SI8231AD-B-ISR is available at Aetrix Electronics and suitable for solar inverters, industrial motor drives, and EV onboard chargers requiring stable component supply, long-term lifecycle support, and full regulatory compliance documentation.
Supply support for SI8231AD-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 engineered to replace optocoupler-based gate drivers with higher reliability, tighter timing control, and integrated safety features - specifically targeting high-efficiency, high-density power conversion systems.
FAQ
What is the isolation voltage rating of the SI8231AD-B-ISR?
The SI8231AD-B-ISR is rated for 5 kVRMS input-to-output isolation per UL 1577 and has been production-tested to 6.0 kVRMS for 1 second. It meets IEC 60747-5-5 with 891 Vpeak working voltage and is certified for reinforced insulation in industrial and solar applications.
Does the SI8231AD-B-ISR support programmable dead time?
Yes, the SI8231AD-B-ISR supports programmable dead time from 70 ns to 900 ns using an external resistor connected to the DT pin. This hardware-based adjustment eliminates reliance on MCU timing margins and improves system robustness against shoot-through.
What package type does the SI8231AD-B-ISR use?
The SI8231AD-B-ISR uses a 16-pin wide-body SOIC (WBSOIC-16) package with 8.0 mm creepage and clearance, enabling 5 kVRMS isolation. Its pinout separates input-side (pins 1–8) and output-side (pins 9–16) domains for optimal PCB layout isolation.
How does the SI8231AD-B-ISR handle undervoltage conditions?
The SI8231AD-B-ISR includes independent undervoltage lockout (UVLO) on VDDI (input supply), VDDA, and VDDB (output supplies). VDDI UVLO thresholds are 3.6 V (rising) and 3.3 V (falling); output-side UVLO varies by version (e.g., 5 V or 12.5 V threshold) and is configurable via part number suffix.
Is the SI8231AD-B-ISR AEC-Q100 qualified?
Yes, the SI8231AD-B-ISR is AEC-Q100 qualified Grade 1 (–40 to +125 °C), making it suitable for automotive applications such as EV onboard chargers, DC/DC converters, and auxiliary power modules where extended temperature operation and reliability are critical.
SI8231AD-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:
- 5000Vrms
- 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
SI8231AD-B-ISR FAQ
1.How can I place an order for SI8231AD-B-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8231AD-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 SI8231AD-B-ISR reliable?
The price and inventory of SI8231AD-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 SI8231AD-B-ISR is usually 5 days.
3.What payment methods are accepted for SI8231AD-B-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8231AD-B-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8231AD-B-ISR?
SI8231AD-B-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8231AD-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 SI8231AD-B-ISR?
For technical support, including SI8231AD-B-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8231AD-B-ISR requirements.
6.How does Aetrix verify that SI8231AD-B-ISR is sourced from the original manufacturer or authorized distributors?
All SI8231AD-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 SI8231AD-B-ISR meets industry standards.
7.What is the process for return or replacement of SI8231AD-B-ISR?
All SI8231AD-B-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8231AD-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 SI8231AD-B-ISR part is unused and in its original packaging.
Return procedure for SI8231AD-B-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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