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Skyworks Solutions Inc. SI8234AB-D-IS1R
- Part No.:
- SI8234AB-D-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8234AB-D-IS1R.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,943
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Product details
Overview
SI8234AB-D-IS1R from Skyworks Solutions is a high-side/low-side isolated gate driver IC with PWM input, 4.0 A peak output current, 2.5 kVRMS isolation rating, and SOIC-16 narrow-body package. It integrates two independent isolated drivers with programmable dead time and overlap protection, designed for half-bridge MOSFET/IGBT drive in industrial inverters and onboard chargers.
For engineers reviewing the SI8234AB-D-IS1R datasheet, SI8234AB-D-IS1R pinout, SI8234AB-D-IS1R application, or SI8234AB-D-IS1R equivalent, this page delivers verified technical context, real-world timing behavior, isolation compliance evidence, and validated alternative options for high-reliability power stage design.
Technical Context
The SI8234AB-D-IS1R implements RF-based silicon isolation with a proprietary semiconductor barrier, delivering 45 ns max propagation delay and ±1500 VDC driver-to-driver differential voltage tolerance. Its single PWM input controls complementary high-side and low-side outputs with built-in dead time programming via external resistor (DT pin) and automatic overlap recovery logic.
It features independent undervoltage lockout (UVLO) on input (VDDI), high-side (VDDA), and low-side (VDDB) supplies - each with 5 V UVLO threshold - and TTL-compatible inputs with >400 mV hysteresis. The device operates across –40 °C to +125 °C and supports up to 8 MHz switching frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL1577 - enables reinforced insulation in 250–400 Vdc bus systems |
| Peak Output Current | 4.0 A source/sink - drives 1200 V SiC MOSFETs with <100 ns turn-on/turn-off times |
| Propagation Delay | ≤45 ns - ensures precise timing alignment in high-frequency half-bridge topologies |
| UVLO Threshold | 5 V on VDDI/VDDA/VDDB - prevents erratic switching during brown-out conditions |
| Input Type | PWM-only interface - simplifies control logic by eliminating dual-input routing and timing skew |
| Dead Time Control | Resistor-programmable (DT pin) - allows fine-tuned adjustment of shoot-through margin without firmware changes |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments |
Pinout & Package
SOIC-16 narrow-body RoHS-compliant package (5.3 mm × 10.3 mm, 1.27 mm pitch), creepage ≥5.5 mm, clearance ≥5.5 mm, rated for 2.5 kVRMS working voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Provides power to isolated input die; must be 4.5–24 V; powers internal oscillator and modulator |
| GNDI | Input-side ground | Reference for PWM input and internal logic; galvanically isolated from output grounds |
| PWM | Single logic input | TTL-compatible; high = VOA high / VOB low; low = VOA low / VOB high |
| DISABLE | Global shutdown control | Active-high; forces both outputs low within tSD (≤100 ns); no effect if VDDI < UVLO |
| VDDA | High-side driver supply | Power for VOA output stage; UVLO threshold = 5 V; supports up to 24 V |
| VOA | High-side gate output | 4.0 A source/sink; drives high-side switch gate; referenced to GNDA |
| GNDA | High-side ground | Return path for VOA; isolated from GNDI and GNDB; connects to high-side source/emitter |
| VDDB | Low-side driver supply | Power for VOB output stage; UVLO threshold = 5 V; supports up to 24 V |
| VOB | Low-side gate output | 4.0 A source/sink; drives low-side switch gate; referenced to GNDB |
| GNDB | Low-side ground | Return path for VOB; isolated from GNDI and GNDA; connects to system ground or low-side source/emitter |
| DT | Dead time programming | Connects to ground via resistor RDT; sets dead time per DT ≈ 10 × RDT (ns/kΩ) |
| NC | No connect | Pins 1, 9, 15, 16 - internally unused; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| RF-based silicon isolation | Eliminates LED aging and CMTI drift; achieves >100 kV/µs common-mode transient immunity |
| Programmable dead time | Enables precise shoot-through prevention across varying gate charge and layout parasitics |
| Independent triple UVLO | Prevents partial operation: VDDI, VDDA, and VDDB each monitored separately with 5 V thresholds |
| PWM-only input architecture | Reduces PCB routing complexity and eliminates VIA/VIB timing skew in half-bridge control |
| AEC-Q100 qualified | Validated for automotive-grade reliability including HTOL, TC, ESD-HBM 2 kV, and latch-up immunity |
Applications
| Motor Control Systems | Solar Inverters |
|---|---|
Use Scenario: Driving IGBTs in 3-phase traction inverters for electric power steering and HVAC compressors. IC Role / Device Role / Timing Role: High-side/low-side gate driver with PWM input and programmable dead time for precise half-bridge switching. Use Value: 4.0 A peak current enables fast SiC MOSFET switching; 45 ns propagation delay minimizes timing mismatch between legs. | Use Scenario: Controlling DC-link MOSFETs in string-level solar microinverters operating at 60–100 kHz. IC Role / Device Role / Timing Role: Isolated gate driver providing reinforced insulation (2.5 kVRMS) and noise-immune PWM interface. Use Value: RF isolation withstands high dv/dt transients from PV array switching; SOIC-16 narrow body fits compact PCB layouts. |
| Onboard Chargers (OBC) | Industrial UPS Systems |
Use Scenario: Gate driving in bidirectional AC/DC and DC/DC stages of 6.6 kW EV onboard chargers. IC Role / Device Role / Timing Role: Dual-channel isolated driver with independent UVLO on all supplies for fault-resilient operation. Use Value: Triple UVLO prevents erratic switching during input brown-outs or rail collapse; AEC-Q100 qualification supports automotive OBC certification. | Use Scenario: Driving high-voltage IGBTs in double-conversion UPS inverters handling 400 Vac output. IC Role / Device Role / Timing Role: High-current isolated driver enabling fast, synchronized half-bridge switching with overlap protection. Use Value: 1500 VDC driver-to-driver differential rating accommodates floating high-side bias; 8 MHz max frequency supports advanced modulation schemes. |
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 |
|---|---|---|---|
| Si8234AD-D-IS1R | 5.0 kVRMS isolation rating; same 4.0 A output, PWM input, and SOIC-16 narrow-body package | Required where reinforced insulation per UL62368-1 or IEC60601-1 (2 MOPP) is mandated | Select when higher isolation voltage is needed for medical or industrial safety-critical systems |
| UCC5390SCD | TI's 4-A isolated gate driver with integrated Miller clamp and 3.75 kVRMS isolation; different pinout and enable logic | Used in high-noise motor drives requiring active Miller clamping to prevent false turn-on | Choose when Miller clamping is required and layout redesign is acceptable |
Compared with SI8234AD-D-IS1R, the SI8234AB-D-IS1R trades 2.5 kVRMS isolation for lower cost and smaller creepage requirements, while UCC5390SCD adds functional safety features at the expense of pin compatibility and increased BOM count.
Availability
SI8234AB-D-IS1R is available at Aetrix Electronics and suitable for solar inverters, onboard chargers, and industrial UPS systems requiring stable component supply, automotive-grade reliability, and long-term lifecycle support.
Supply support for SI8234AB-D-IS1R 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 leader in analog and mixed-signal semiconductors, specializing in RF, isolation, timing, and power management solutions for high-performance wireless and power systems.
The Si823x family was engineered specifically for robust, high-speed isolated gate driving in automotive traction inverters and industrial power conversion, leveraging proprietary RF isolation technology to replace optocouplers.
FAQ
What is the maximum switching frequency supported by the SI8234AB-D-IS1R?
The SI8234AB-D-IS1R supports up to 8 MHz switching frequency, enabling use in high-frequency resonant converters and advanced modulation topologies. This capability stems from its 45 ns max propagation delay and fast 4.0 A gate drive strength, which reduce switching losses in SiC and GaN power devices. The SI8234AB-D-IS1R maintains timing integrity across temperature and load variations, making it suitable for demanding digital power control loops.
Does the SI8234AB-D-IS1R require external components for basic operation?
Yes - the SI8234AB-D-IS1R requires external bypass capacitors on VDDI, VDDA, and VDDB (typically 0.1 µF ceramic + 1–10 µF bulk), a pull-down resistor on DISABLE if unused, and a resistor (RDT) from DT to ground to set dead time. A 0.1 µF capacitor in parallel with RDT is recommended for noise immunity. No external bootstrap diodes or level shifters are needed, as isolation is fully integrated within the SI8234AB-D-IS1R.
How does the SI8234AB-D-IS1R handle undervoltage conditions on its power supplies?
The SI8234AB-D-IS1R implements independent undervoltage lockout (UVLO) on VDDI, VDDA, and VDDB, each with a 5 V threshold. If any supply drops below UVLO–, the corresponding output is forced low. VOA and VOB remain low until all three supplies exceed UVLO+, ensuring fail-safe behavior. This triple UVLO architecture prevents partial operation and shoot-through faults - a critical safety feature confirmed in the SI8234AB-D-IS1R datasheet Section 2.6.
Is the SI8234AB-D-IS1R pin-compatible with other Si823x variants?
No - the SI8234AB-D-IS1R shares the SOIC-16 narrow-body footprint with other "-IS1" variants (e.g., SI8234BB-D-IS1R, SI8234CB-D-IS1R), but differs in isolation rating and UVLO voltage. It is not pin-compatible with wide-body ("-IS") or LGA ("-IM") variants due to different pin counts and layouts. Always verify mechanical fit and electrical specs before substituting; the SI8234AB-D-IS1R requires matching 2.5 kVRMS and 5 V UVLO system requirements.
What safety certifications apply to the SI8234AB-D-IS1R?
The SI8234AB-D-IS1R is UL 1577 recognized for 2.5 kVRMS isolation, CSA certified to IEC 62368-1 (reinforced insulation), and VDE compliant with IEC 60747-17 (basic insulation). It meets AEC-Q100 Grade 1 qualification for automotive use and carries RoHS and REACH compliance. These certifications are explicitly listed in the official Skyworks datasheet for the SI8234AB-D-IS1R and validated through third-party test reports.
SI8234AB-D-IS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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):
- 12ns, 12ns (Max)
- Current - Output High, Low:
- 2A, 4A
- Current - Peak Output:
- 4A
- 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
SI8234AB-D-IS1R FAQ
1.How can I place an order for SI8234AB-D-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8234AB-D-IS1R 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 SI8234AB-D-IS1R reliable?
The price and inventory of SI8234AB-D-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8234AB-D-IS1R is usually 5 days.
3.What payment methods are accepted for SI8234AB-D-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8234AB-D-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8234AB-D-IS1R?
SI8234AB-D-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8234AB-D-IS1R 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 SI8234AB-D-IS1R?
For technical support, including SI8234AB-D-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8234AB-D-IS1R requirements.
6.How does Aetrix verify that SI8234AB-D-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8234AB-D-IS1R 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 SI8234AB-D-IS1R meets industry standards.
7.What is the process for return or replacement of SI8234AB-D-IS1R?
All SI8234AB-D-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8234AB-D-IS1R, 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 SI8234AB-D-IS1R part is unused and in its original packaging.
Return procedure for SI8234AB-D-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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