My Inquiry
My Account
Skyworks Solutions Inc. SI8231AB-D-ISR
- Part No.:
- SI8231AB-D-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8231AB-D-ISR.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,256
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI8231AB-D-ISR 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 for half-bridge MOSFET/IGBT control in power converters and motor drives.
For engineers reviewing the SI8231AB-D-ISR datasheet, SI8231AB-D-ISR pinout, SI8231AB-D-ISR application, or SI8231AB-D-ISR equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options - all aligned to the exact part number and its documented electrical behavior, safety certifications, and automotive-grade qualification status.
Technical Context
The SI8231AB-D-ISR implements RF-based silicon isolation with a proprietary semiconductor barrier, delivering 45 ns propagation delay and up to 8 MHz switching frequency. Its single PWM input controls complementary high-side and low-side outputs with built-in programmable dead time and overlap protection logic.
It features independent undervoltage lockout (UVLO) on input (VDDI), high-side (VDDA), and low-side (VDDB) supplies, with 5 V UVLO threshold and internal hysteresis >400 mV. Outputs are TTL-compatible and support grounded or floating output configurations across separate grounds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL1577 - enables safe operation in medium-voltage industrial inverters and onboard chargers |
| Peak Output Current | 0.5 A - sufficient to drive small-to-medium IGBTs and MOSFETs in <1 kW power stages |
| Propagation Delay | 45 ns - supports precise timing control in high-frequency PWM applications up to 8 MHz |
| UVLO Threshold | 5 V - ensures reliable startup and shutdown behavior in 5 V control rail systems |
| Input Type | PWM - simplifies control interface by replacing dual-input logic with single-signal complementary output generation |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| AEC-Q100 Grade | Qualified - meets automotive reliability requirements for onboard chargers and battery management systems |
Pinout & Package
SI8231AB-D-ISR is housed in a RoHS-compliant SOIC-16 narrow body package (5.3 mm × 10.3 mm, 1.75 mm height) with creepage/clearance optimized for 2.5 kVRMS isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Provides power to isolated input die; must be ≥5 V to exit UVLO and enable signal transmission |
| GNDI | Input-side ground | Reference for PWM input and internal oscillator; galvanically separated from output grounds |
| PWM | Single logic input | TTL-compatible; high = VOA high / VOB low; low = VOA low / VOB high |
| DISABLE | Global output disable | Active-high; forces both outputs low regardless of PWM state when asserted |
| VDDA | High-side driver supply | Power for high-side output stage; UVLO triggers if <5 V, forcing VOA low |
| VOA | High-side gate output | Drives MOSFET/IGBT gate with 0.5 A sink/source; referenced to GNDA |
| GNDA | High-side ground | Return path for high-side driver; may be connected to bootstrap node or floating rail |
| VDDB | Low-side driver supply | Power for low-side output stage; independent UVLO monitoring at 5 V threshold |
| VOB | Low-side gate output | Complementary to VOA; referenced to GNDB; supports direct ground-referenced switching |
| GNDB | Low-side ground | Return path for low-side driver; typically system ground or isolated reference |
| DT | Dead time programming | Resistor-to-ground sets dead time (ns); floating or tied to VDDI yields ~400 ps nominal |
| NC | No connect | Pins 1, 9, 10, 15 - internally unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| RF-based silicon isolation | Eliminates LED aging and CMTI limitations of optocouplers; achieves >100 kV/µs common-mode transient immunity |
| Programmable dead time | Configurable via external resistor (RDT) to prevent shoot-through in half-bridge topologies without MCU intervention |
| Independent UVLO per supply | Ensures safe default-low output states during brown-out on VDDI, VDDA, or VDDB - critical for fault-tolerant power stages |
| PWM input architecture | Reduces PCB routing complexity vs. dual-input drivers; eliminates need for external logic to generate complementary signals |
| AEC-Q100 qualification | Validated for automotive use in OBCs and traction inverters, including PPAP documentation and IMDS/CAMDS compliance |
Applications
| Motor Control Systems | Isolated DC-DC Power Supplies |
|---|---|
Use Scenario: Driving half-bridge IGBTs in 48 V BLDC motor controllers for e-bikes and industrial actuators. IC Role / Device Role / Timing Role: High-side/low-side gate driver with PWM input and programmable dead time to prevent shoot-through during commutation. Use Value: Enables compact, reliable motor control with 45 ns propagation matching and 0.5 A drive strength for fast turn-on of <100 nC gate charge devices. | Use Scenario: Controlling synchronous rectifiers and primary-side switches in isolated flyback and LLC resonant converters. IC Role / Device Role / Timing Role: Isolated gate driver providing reinforced insulation between primary and secondary control domains. Use Value: 2.5 kVRMS isolation and AEC-Q100 qualification support safety-critical power delivery in medical and EV auxiliary supplies. |
| Onboard Chargers (OBC) | Battery Management Systems (BMS) |
Use Scenario: Gate driving SiC MOSFETs in bidirectional AC/DC and DC/DC stages of automotive OBC modules. IC Role / Device Role / Timing Role: PWM-controlled isolated driver enabling precise phase-shifted modulation in dual-active-bridge topologies. Use Value: 8 MHz max switching frequency and 5 V UVLO match 3.3/5 V microcontroller interfaces while maintaining robust isolation in high-noise EV environments. | Use Scenario: Isolating gate drive signals between battery pack controller and cell-level switching FETs in modular BMS stacks. IC Role / Device Role / Timing Role: Dual-channel isolated driver ensuring fault containment between high-voltage battery rails and low-voltage monitoring circuits. Use Value: Independent UVLO on VDDA/VDDB prevents unintended switching during partial power loss - essential for fail-safe cell balancing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8231BB-D-IS1 | Same PWM input, 0.5 A, SOIC-16 narrow body, but 2.5 kVRMS isolation and 8 V UVLO | Designed for industrial systems where higher UVLO margin is required; not AEC-Q100 qualified | Select when automotive qualification is unnecessary and 8 V UVLO improves noise immunity in noisy 24 V systems |
| UCC21520DWR | TI dual-channel isolated driver with 4 A peak output, 5 kVRMS, and dual-input logic (not PWM) | Higher drive strength suits larger MOSFETs; lacks integrated dead time programming and requires external logic for complement generation | Select when >0.5 A drive is needed or when design already uses dual-input control architecture |
Compared with Si8231BB-D-IS1, SI8231AB-D-ISR offers automotive qualification and lower UVLO for 5 V systems; compared with UCC21520DWR, it trades higher drive strength for integrated PWM logic and simpler layout - making it optimal for cost-sensitive, space-constrained automotive OBC and BMS designs.
Availability
SI8231AB-D-ISR is available at Aetrix Electronics and suitable for onboard chargers, battery management systems, and isolated DC-DC power supplies requiring stable component supply, automotive-grade reliability, and reinforced insulation certification.
Supply support for SI8231AB-D-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
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions for communications, automotive, and industrial markets.
The Si823x family was designed specifically for isolated gate driving in high-reliability power conversion systems - emphasizing robustness, low propagation delay, and automotive qualification from the outset.
FAQ
What is the isolation voltage rating of SI8231AB-D-ISR?
The SI8231AB-D-ISR has a certified 2.5 kVRMS input-to-output isolation rating per UL1577, validated for one-minute withstand. This rating supports reinforced insulation in applications such as onboard chargers and isolated DC-DC converters where galvanic separation between control and power domains is mandatory.
Does SI8231AB-D-ISR support programmable dead time?
Yes, SI8231AB-D-ISR supports programmable dead time via an external resistor (RDT) connected from the DT pin to ground. The dead time (in ns) follows DT ≈ 10 × RDT (kΩ), enabling precise shoot-through prevention in half-bridge topologies without firmware overhead.
What is the UVLO threshold for SI8231AB-D-ISR?
The SI8231AB-D-ISR features a 5 V undervoltage lockout (UVLO) threshold on VDDI, VDDA, and VDDB supplies, with >400 mV hysteresis. This ensures clean startup and fault-safe default-low outputs during brown-out conditions typical in automotive 5 V rail systems.
Is SI8231AB-D-ISR qualified for automotive applications?
Yes, SI8231AB-D-ISR is AEC-Q100 qualified and designated as an automotive-grade part (suffix "-A" in full OPN). It supports AIAG-compliant PPAP documentation, IMDS/CAMDS listing, and zero-defect manufacturing flows for use in onboard chargers and battery management systems.
How does the PWM input function in SI8231AB-D-ISR?
In SI8231AB-D-ISR, the PWM input directly controls complementary outputs: a high PWM signal drives VOA high and VOB low; a low PWM signal drives VOA low and VOB high. This eliminates external logic gates and simplifies timing-critical half-bridge control in motor drives and power converters.
SI8231AB-D-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:
- 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-ISR FAQ
1.How can I place an order for SI8231AB-D-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8231AB-D-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 SI8231AB-D-ISR reliable?
The price and inventory of SI8231AB-D-ISR 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-ISR is usually 5 days.
3.What payment methods are accepted for SI8231AB-D-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8231AB-D-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8231AB-D-ISR?
SI8231AB-D-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8231AB-D-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 SI8231AB-D-ISR?
For technical support, including SI8231AB-D-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8231AB-D-ISR requirements.
6.How does Aetrix verify that SI8231AB-D-ISR is sourced from the original manufacturer or authorized distributors?
All SI8231AB-D-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 SI8231AB-D-ISR meets industry standards.
7.What is the process for return or replacement of SI8231AB-D-ISR?
All SI8231AB-D-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8231AB-D-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 SI8231AB-D-ISR part is unused and in its original packaging.
Return procedure for SI8231AB-D-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8231AB-D-ISR Tags
.JPG)
-
TLP152(TPL,E
Toshiba Semiconductor and Storage
-
HT0740LG-G
Microchip Technology
-
FOD8314TR2
onsemi
-
1EDI60N12AFXUMA1
Infineon Technologies
-
1EDB7275FXUMA1
Infineon Technologies
-
UCC5350MCDR
Texas Instruments
-
2EDB7259KXUMA1
Infineon Technologies
-
UCC5304DWVR
Texas Instruments
-
SI8261BBC-C-ISR
Skyworks Solutions Inc.
-
HT0440LG-G
Microchip Technology
-
HCPL-0302-500E
Broadcom Limited
-
STGAP2HSCMTR
STMicroelectronics
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
