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Skyworks Solutions Inc. SI8231AB-D-IS1
- Part No.:
- SI8231AB-D-IS1
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8231AB-D-IS1.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,394
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Product details
Overview
SI8231AB-D-IS1 from Skyworks Solutions is a high-side/low-side isolated gate driver IC with PWM input, 0.5 A peak output current, 2.5 kVRMS isolation rating, and SOIC-16 narrow-body package. It integrates two independent isolated drivers using silicon-based RF isolation, enabling robust half-bridge MOSFET/IGBT drive in space-constrained industrial power systems.
For engineers reviewing the SI8231AB-D-IS1 datasheet, SI8231AB-D-IS1 pinout, SI8231AB-D-IS1 application, or SI8231AB-D-IS1 equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options for gate-drive circuit design, motor control layout, and isolated power supply implementation.
Technical Context
The SI8231AB-D-IS1 implements a single-PWM-input high-side/low-side configuration with built-in programmable dead time and overlap protection logic. Its RF-based isolation barrier provides 2.5 kVRMS withstand voltage (UL1577), 45 ns max propagation delay, and TTL-compatible input with >400 mV hysteresis.
It features independent undervoltage lockout (UVLO) on input (VDDI), high-side (VDDA), and low-side (VDDB) supplies, with 5 V UVLO threshold and automatic output disable during fault conditions. The DT pin supports resistor-programmable dead time (10 × RDT ns) to prevent shoot-through in bridge topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL1577 - enables reinforced insulation in 250–400 VAC mains-connected systems |
| Peak Output Current | 0.5 A - sufficient to drive medium-power MOSFETs (Qg ≤ 25 nC) at ≤1 MHz switching |
| Propagation Delay | ≤45 ns - supports high-frequency PWM control up to 8 MHz with tight timing margins |
| UVLO Threshold | 5 V (VDDI) - ensures reliable startup and shutdown behavior in 5 V logic-supplied systems |
| Input Compatibility | TTL-level with >400 mV hysteresis - rejects noise in noisy industrial environments without external Schmitt triggers |
| Package | SOIC-16 narrow body - fits standard PCB footprints while maintaining 2.5 kVRMS creepage/clearance |
| Operating Temp | –40 °C to +125 °C - qualified for extended industrial and automotive under-hood applications |
Pinout & Package
SI8231AB-D-IS1 uses a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width) with 1.27 mm pitch, rated for 260 °C reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Powers internal RF transmitter and logic; must be ≥5 V for reliable operation |
| GNDI | Input-side ground | Reference for PWM input and internal isolation barrier; must be separated from power grounds |
| PWM | Single logic input | TTL-compatible signal: high → VOA=H/VOB=L; low → VOA=L/VOB=H |
| DISABLE | Global output disable | Active-high; forces both outputs low regardless of PWM state when asserted |
| VDDA | High-side driver supply | Powers high-side output stage; UVLO triggers if <5 V |
| VOA | High-side gate output | Drives MOSFET/IGBT gate referenced to floating high-side source (e.g., bootstrap node) |
| GNDA | High-side ground reference | Return path for VOA; tied to source of high-side switch |
| VDDB | Low-side driver supply | Powers low-side output stage; independent UVLO monitoring |
| VOB | Low-side gate output | Drives low-side switch referenced to system ground or isolated return |
| GNDB | Low-side ground reference | Return path for VOB; typically connected to system ground or isolated return plane |
| DT | Dead time programming | Resistor-to-ground sets dead time (DT = 10 × RDT ns); floating = ~400 ps nominal |
Key Features
| Feature | Design Value |
|---|---|
| Integrated overlap protection | Prevents simultaneous high-state outputs via hardware logic - eliminates risk of shoot-through without MCU intervention |
| Programmable dead time | Resistor-adjustable delay (0–1 µs range) between VOA/VOB transitions - enables precise timing tuning for different FETs and layouts |
| Silicon RF isolation | No LED degradation or CMTI drift over time - maintains 45 ns propagation delay and >35 kV/µs common-mode transient immunity across life |
| Independent UVLO per domain | Separate monitoring of VDDI, VDDA, and VDDB ensures safe output behavior during partial supply faults or bootstrap capacitor discharge |
| AEC-Q100 qualified | Automotive-grade variant available (SI8231AB-AS1) - supports onboard chargers and traction inverters requiring zero-defect manufacturing |
Applications
| Motor Control Systems | Isolated DC-DC Power Supplies |
|---|---|
|
Use Scenario: Driving half-bridge IGBTs in 3-phase BLDC motor inverters for HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: High-side/low-side gate driver with PWM input and programmable dead time, synchronizing switching of upper/lower FETs. Use Value: Prevents shoot-through via hardware overlap protection and enables compact layout with SOIC-16 narrow-body footprint. |
Use Scenario: Gate driving synchronous rectifiers and primary-side switches in isolated flyback and LLC resonant converters. IC Role / Device Role / Timing Role: Isolated level shifter and driver delivering precise PWM edge timing across 2.5 kVRMS barrier. Use Value: Maintains <45 ns propagation delay variation over temperature, ensuring stable regulation and efficiency at 500 kHz–1 MHz. |
| Solar Inverters | Onboard Chargers (OBC) |
|
Use Scenario: Controlling H-bridge MOSFETs in string-level MPPT stages and grid-tie inverters operating at 600–1000 VDC bus. IC Role / Device Role / Timing Role: Reinforced-isolation gate driver interfacing microcontroller PWM to high-voltage power stage. Use Value: 2.5 kVRMS rating meets IEC 62109 creepage requirements for PV system safety certification. |
Use Scenario: Driving SiC MOSFETs in bidirectional AC/DC and DC/DC stages of EV onboard chargers. IC Role / Device Role / Timing Role: High-CMTI isolated driver supporting fast-switching SiC with minimal timing skew. Use Value: >35 kV/µs common-mode transient immunity prevents false triggering during high-di/dt switching events. |
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 |
|---|---|---|---|
| Si8231BB-D-IS1 | Same PWM-input HS/LS architecture, but 8 V UVLO threshold and 2.5 kVRMS rating in SOIC-16 narrow body | Better suited for 12 V input-supplied systems where higher UVLO margin is required | Select when system VDDI is ≥8 V and tighter UVLO hysteresis is needed for noisy rail environments |
| Si8231AD-D-IS | Identical functionality and 5 V UVLO, but in SOIC-16 wide-body package with 5.0 kVRMS isolation | Required for applications needing reinforced insulation per IEC 62368-1 or medical 2 MOPP compliance | Choose when regulatory certification demands ≥5 kVRMS isolation, accepting larger board area |
Compared with SI8231AB-D-IS1, Si8231BB-D-IS1 offers higher UVLO for 12 V systems but same isolation; Si8231AD-D-IS adds 5 kVRMS safety margin at the cost of wider SOIC footprint - selection depends on supply rail stability and regulatory isolation requirements.
Availability
SI8231AB-D-IS1 is available at Aetrix Electronics and suitable for motor control systems, isolated dc-dc power supplies, and solar inverters requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.
Supply support for SI8231AB-D-IS1 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, with leadership in RF, isolation, and precision timing technologies.
The Si823x family was designed specifically for isolated gate driving in high-reliability power conversion systems, combining silicon-based isolation, programmable timing control, and automotive-qualified robustness.
FAQ
What is the isolation voltage rating of the SI8231AB-D-IS1?
The SI8231AB-D-IS1 has a certified 2.5 kVRMS input-to-output isolation rating per UL1577, tested for one minute. This rating applies to its SOIC-16 narrow-body package and supports reinforced insulation in industrial power applications up to 400 VAC mains systems. It is not rated for 5 kVRMS - that requires variants like SI8231AD-D-IS.
Does the SI8231AB-D-IS1 support programmable dead time?
Yes, the SI8231AB-D-IS1 supports resistor-programmable dead time via its DT pin. Connecting a resistor RDT (in kΩ) from DT to ground sets dead time as DT = 10 × RDT ns. Floating the pin yields ~400 ps nominal dead time. A 0.1 µF ceramic capacitor placed near the DT pin improves noise immunity.
What is the function of the DISABLE pin on the SI8231AB-D-IS1?
The DISABLE pin on the SI8231AB-D-IS1 is an active-high control that unconditionally forces both VOA and VOB outputs low, overriding the PWM input. It asserts within tSD (typ. 100 ns) and releases within tRESTART (typ. 500 ns) after being deasserted. It has no effect if VDDI is below UVLO.
Can the SI8231AB-D-IS1 drive SiC MOSFETs?
Yes, the SI8231AB-D-IS1 can drive discrete SiC MOSFETs with gate charge ≤25 nC at switching frequencies up to 1 MHz, thanks to its 0.5 A peak output current and <45 ns propagation delay. For higher Qg devices or >1 MHz operation, consider the 4.0 A variants like SI8234AB-D-IS1.
What is the input logic compatibility of the SI8231AB-D-IS1 PWM pin?
The PWM input of the SI8231AB-D-IS1 is TTL-level compatible with >400 mV hysteresis, accepting logic-high voltages from 2.0 V to VDDI and logic-low ≤0.8 V. It does not require external level shifting when driven by standard 3.3 V or 5 V microcontrollers, and the hysteresis suppresses noise-induced glitches.
SI8231AB-D-IS1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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
SI8231AB-D-IS1 FAQ
1.How can I place an order for SI8231AB-D-IS1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8231AB-D-IS1 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 SI8231AB-D-IS1 reliable?
The price and inventory of SI8231AB-D-IS1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8231AB-D-IS1 is usually 5 days.
3.What payment methods are accepted for SI8231AB-D-IS1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8231AB-D-IS1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8231AB-D-IS1?
SI8231AB-D-IS1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8231AB-D-IS1 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 SI8231AB-D-IS1?
For technical support, including SI8231AB-D-IS1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8231AB-D-IS1 requirements.
6.How does Aetrix verify that SI8231AB-D-IS1 is sourced from the original manufacturer or authorized distributors?
All SI8231AB-D-IS1 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 SI8231AB-D-IS1 meets industry standards.
7.What is the process for return or replacement of SI8231AB-D-IS1?
All SI8231AB-D-IS1 units undergo pre-shipment inspection (PSI). If there is an issue with SI8231AB-D-IS1, 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 SI8231AB-D-IS1 part is unused and in its original packaging.
Return procedure for SI8231AB-D-IS1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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