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Skyworks Solutions Inc. SI8234AC-AS1R
- Part No.:
- SI8234AC-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8234AC-AS1R.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:2,748
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Product details
Overview
SI8234AC-AS1R from Skyworks Solutions is an automotive-grade, isolated high-side/low-side gate driver IC with PWM input configuration, 4.0 A peak output current, 3.75 kVRMS isolation rating, and SOIC-16 narrow-body package. It integrates two independently isolated drivers for half-bridge MOSFET/IGBT control in traction inverters and onboard chargers.
For engineers reviewing the SI8234AC-AS1R datasheet, SI8234AC-AS1R pinout, SI8234AC-AS1R application, or SI8234AC-AS1R equivalent, key selection factors include its AEC-Q100 qualification, programmable dead time via external resistor, 45 ns propagation delay, and UVLO threshold of 5 V on both input and output sides.
Technical Context
The SI8234AC-AS1R implements RF-based isolation with semiconductor barrier technology, enabling robust noise immunity and eliminating startup initialization. Its single PWM input controls complementary high-side (VOA) and low-side (VOB) outputs with built-in overlap protection and user-programmable dead time (DT pin).
It features independent undervoltage lockout (UVLO) on VDDI (5 V threshold), VDDA, and VDDB, ensuring safe operation during power sequencing. Output drivers support rail-to-rail swing up to 24 V supply and tolerate ±1500 VDC differential voltage between driver outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75 kVRMS per UL1577 - enables reinforced insulation in 400 Vdc bus systems |
| Peak Output Current | 4.0 A - drives high-gate-charge SiC MOSFETs and IGBTs without external buffers |
| Propagation Delay | 45 ns max - supports >8 MHz switching frequency with tight timing control |
| UVLO Threshold | 5 V on VDDI - ensures reliable startup in automotive 5 V supply domains |
| Package | SOIC-16 narrow body - 10.3 mm × 7.5 mm footprint compatible with standard PCB assembly |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood and powertrain applications |
| AEC-Q100 Grade | Grade 1 - meets automotive reliability requirements for safety-critical subsystems |
Pinout & Package
SOIC-16 narrow-body package (7.5 mm × 10.3 mm, 1.27 mm pitch), RoHS-compliant, JEDEC MS-012AC, peak reflow 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Powers internal RF transmitter and logic; 4.5–5.5 V nominal, 5 V UVLO threshold |
| GNDI | Input-side ground | Reference for PWM input and internal isolation barrier |
| PWM | Single logic input | TTL-compatible; high = VOA high / VOB low; low = VOA low / VOB high |
| DISABLE | Global shutdown control | Active-high; forces VOA/VOB low regardless of PWM state when asserted |
| VDDA | High-side driver supply | Powers VOA output stage; supports up to 24 V; 5 V UVLO threshold |
| GNDA | High-side driver ground | Reference for VOA; isolated from GNDI and GNDB |
| VOA | High-side gate drive output | 4.0 A sink/source; rail-to-rail swing; connects to gate of high-side switch |
| VDDB | Low-side driver supply | Powers VOB output stage; supports up to 24 V; 5 V UVLO threshold |
| GNDB | Low-side driver ground | Reference for VOB; isolated from GNDI and GNDA |
| VOB | Low-side gate drive output | 4.0 A sink/source; rail-to-rail swing; connects to gate of low-side switch |
| DT | Dead time programming | Resistor-to-ground sets dead time (DT ≈ 10 × RDT ns); floating = ~400 ps nominal |
| NC | No connect | Pins 1, 9, 15, 16 - unused; must be left unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED aging and CMTI limitations; achieves >100 kV/µs common-mode transient immunity |
| Programmable dead time | External resistor (RDT) sets precise delay (10–500 ns range) to prevent shoot-through in half-bridge topologies |
| Independent UVLO monitoring | Separate 5 V thresholds on VDDI, VDDA, and VDDB ensure fail-safe shutdown if any supply drops out |
| Automotive qualification | AEC-Q100 Grade 1, AIAG PPAP support, IMDS/CAMDS compliance - ready for production automotive use |
| Bootstrap-compatible interface | VOA output supports high-side bootstrap operation up to 1500 V drain-source voltage with external diode/capacitor |
Applications
| Onboard Charger (OBC) | Traction Inverter |
|---|---|
Use Scenario: Controls bidirectional AC/DC and DC/DC stages in 11 kW–22 kW EV onboard chargers using dual active bridge topology. IC Role / Device Role / Timing Role: SI8234AC-AS1R provides isolated, complementary PWM-driven gate signals to high-side and low-side SiC MOSFETs in primary and secondary bridges. Use Value: 45 ns propagation matching and programmable dead time minimize conduction loss and prevent shoot-through at 100–300 kHz switching frequencies. | Use Scenario: Drives phase-leg IGBTs or SiC modules in 400 V–800 V battery electric vehicle traction inverters. IC Role / Device Role / Timing Role: SI8234AC-AS1R serves as isolated half-bridge driver per phase leg, with DISABLE used for fault-induced shutdown. Use Value: 3.75 kVRMS isolation and AEC-Q100 Grade 1 qualification meet ISO 26262 ASIL-B system requirements for functional safety. |
| Battery Management System (BMS) | Industrial Solar Inverter |
Use Scenario: Isolates gate drive signals for contactor pre-charge and main disconnect MOSFETs in high-voltage battery packs (up to 900 V). IC Role / Device Role / Timing Role: SI8234AC-AS1R delivers controlled turn-on/turn-off sequencing with UVLO monitoring across isolated domains. Use Value: Independent VDDA/VDDB UVLO prevents partial drive activation during pack voltage ramp-up or fault conditions. | Use Scenario: Controls H-bridge and NPC (neutral-point-clamped) stages in 3-phase string inverters for commercial rooftop solar installations. IC Role / Device Role / Timing Role: SI8234AC-AS1R drives high-side and low-side switches per leg with synchronized dead time to manage reactive power flow. Use Value: 4.0 A peak output sustains gate charge delivery for 1200 V SiC devices under 15 A load currents at 20 kHz switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8234BD-AS1R | Same pinout and function, but 8 V UVLO threshold and 5.0 kVRMS isolation | Required where system-level reinforced insulation mandates 5 kVRMS (e.g., medical or industrial UPS) | Select when higher isolation voltage and wider UVLO hysteresis are needed; not drop-in for 3.75 kV designs |
| UCC5390SCDR | TI part with 4 A output, 3.75 kVRMS, but no programmable dead time or automotive qualification | Suitable for industrial inverters without ASIL requirements; lacks PPAP/IMDS support | Choose for cost-sensitive non-automotive designs where dead time is managed externally |
Compared with SI8234BD-AS1R, the SI8234AC-AS1R offers tighter 5 V UVLO for 5 V MCU interfaces and optimized creepage for compact 3.75 kV systems; versus UCC5390SCDR, it delivers AEC-Q100 compliance and integrated dead time control essential for automotive OBC and traction systems.
Availability
SI8234AC-AS1R is available at Aetrix Electronics and suitable for onboard chargers, traction inverters, and battery management systems requiring stable component supply, automotive qualification, and long-term lifecycle support.
Supply support for SI8234AC-AS1R 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-reliability markets.
The Si823x family was designed specifically for isolated gate driving in automotive electrification and industrial power conversion, emphasizing AEC-Q100 compliance, fast propagation, and robust noise immunity in harsh EMI environments.
FAQ
What is the isolation voltage rating of the SI8234AC-AS1R?
The SI8234AC-AS1R has a certified 3.75 kVRMS input-to-output isolation rating per UL1577, validated for one-minute withstand. This rating supports reinforced insulation in 400 Vdc battery systems and complies with IEC 62368-1 and GB4943.1 standards for industrial and automotive end equipment.
Does the SI8234AC-AS1R support programmable dead time?
Yes, the SI8234AC-AS1R supports user-programmable dead time via an external resistor (RDT) connected from the DT pin to ground. The relationship is DT (ns) ≈ 10 × RDT (kΩ), enabling precise adjustment from ~10 ns to 500 ns. Floating the DT pin yields ~400 ps nominal dead time.
What is the UVLO threshold for the SI8234AC-AS1R input supply?
The SI8234AC-AS1R has a 5 V undervoltage lockout (UVLO) threshold on the input-side supply (VDDI), with hysteresis specified per datasheet. This ensures reliable startup and shutdown behavior in automotive 5 V supply domains and prevents erratic operation during brownout conditions.
Is the SI8234AC-AS1R pin-compatible with other Si823x variants?
Yes, the SI8234AC-AS1R shares identical SOIC-16 narrow-body pinout with all Si823x PWM-input variants (e.g., Si8234AB-AS1R, Si8234BB-AS1R). However, differences in UVLO threshold (5 V vs. 8 V) and isolation rating (3.75 kV vs. 2.5 kV or 5.0 kV) require verification of system-level compliance before substitution.
What automotive qualifications does the SI8234AC-AS1R hold?
The SI8234AC-AS1R is AEC-Q100 Grade 1 qualified, manufactured using full automotive process flows, and supported with AIAG-compliant PPAP documentation, IMDS, and CAMDS listings. It meets zero-defect methodology requirements across design, qualification, and mass production phases.
SI8234AC-AS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si823x
- 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:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 20kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 45ns, 45ns
- Pulse Width Distortion (Max):
- 5.6ns
- Rise / Fall Time (Typ):
- 12ns, 12ns (Max)
- Current - Output High, Low:
- 200mA, 400mA
- 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, UL, VDE
SI8234AC-AS1R FAQ
1.How can I place an order for SI8234AC-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8234AC-AS1R 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 SI8234AC-AS1R reliable?
The price and inventory of SI8234AC-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8234AC-AS1R is usually 5 days.
3.What payment methods are accepted for SI8234AC-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8234AC-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8234AC-AS1R?
SI8234AC-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8234AC-AS1R 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 SI8234AC-AS1R?
For technical support, including SI8234AC-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8234AC-AS1R requirements.
6.How does Aetrix verify that SI8234AC-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8234AC-AS1R 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 SI8234AC-AS1R meets industry standards.
7.What is the process for return or replacement of SI8234AC-AS1R?
All SI8234AC-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8234AC-AS1R, 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 SI8234AC-AS1R part is unused and in its original packaging.
Return procedure for SI8234AC-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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