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Skyworks Solutions Inc. SI8235AC-D-IS1R
- Part No.:
- SI8235AC-D-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8235AC-D-IS1R.pdf
- Description:
- DGT ISO 3.75KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,835
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Product details
Overview
SI8235AC-D-IS1R from Skyworks Solutions is a dual-channel isolated gate driver IC with 4.0 A peak output current per channel, 3.75 kVRMS input-to-output isolation, and TTL-compatible dual-input (VIA/VIB) configuration in SOIC-16 narrow-body package. It operates across –40°C to +125°C and supports high-speed switching up to 8 MHz in isolated half-bridge and dual-MOSFET/IGBT drive applications for solar inverters and motor control.
For engineers reviewing the SI8235AC-D-IS1R datasheet, SI8235AC-D-IS1R pinout, SI8235AC-D-IS1R application, or SI8235AC-D-IS1R equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation value, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The SI8235AC-D-IS1R implements two fully independent, galvanically isolated driver channels using Skyworks' proprietary silicon RF-based isolation barrier-enabling up to 5 kVRMS withstand voltage (UL1577), 45 ns propagation delay, and immunity to magnetic fields and EMI. Unlike optocoupler-based drivers, it requires no external biasing or startup initialization.
As a dual-driver (not HS/LS), it lacks programmable dead time and overlap protection-outputs respond immediately to input transitions with no internal delay. Each channel features independent undervoltage lockout (UVLO) with 5 V threshold and supports separate or common ground configurations for VDDA/VDDB and GNDA/GNDB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75 kVRMS (UL1577) - enables reinforced insulation in industrial power converters meeting IEC 62368-1 and GB4943.1 safety standards. |
| Peak Output Current | 4.0 A per channel - drives high-gate-charge MOSFETs/IGBTs directly without external buffers in 10–20 kW inverters. |
| Propagation Delay | 45 ns max - ensures tight timing alignment between dual outputs for synchronous switching in bidirectional DC-DC stages. |
| Supply Voltage Range | VDDI: 4.5–5.5 V; VDDA/VDDB: 10–24 V - supports logic-side 5 V MCU interfacing and power-side 12/15/24 V gate drive rails. |
| UVLO Threshold | 5 V (rising) - prevents erratic output behavior during brown-out conditions in battery-backed industrial controllers. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive BMS and outdoor solar inverter environments. |
| Switching Frequency | Up to 8 MHz - supports high-frequency GaN FET drive in resonant LLC and active clamp flyback topologies. |
Pinout & Package
SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length), RoHS-compliant, JEDEC MS-012AC, 260 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Input-side terminals (GNDI, VDDI, VIA, VIB, DISABLE) | GNDI and VDDI power the isolated input die; VIA/VIB accept TTL inputs; DISABLE forces both outputs low when high. |
| 9, 10, 11, 12, 13, 14, 15, 16 | Output-side terminals (GNDA, VDDA, VOA, VDDB, VOB) | VDDA/VDDB power respective driver stages; VOA/VOB deliver 4.0 A sink/source to gate nodes; GNDA/GNDB may be separated for noise isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated channels | Eliminates need for two discrete isolators in dual-switch topologies (e.g., H-bridge motor control), reducing PCB area by >35% vs. dual-SOIC solution. |
| Silicon RF isolation barrier | Delivers 45 ns propagation delay and <1 ns skew between channels-critical for minimizing shoot-through risk in fast-switching SiC inverters. |
| TTL-compatible inputs with 400 mV hysteresis | Enables direct interface with 3.3 V/5 V MCUs and FPGAs without level-shifting, while rejecting noise spikes up to ±2 kV/µs (CMTI). |
| Independent UVLO per channel | Prevents partial drive failure: if VDDA drops below 5 V, only VOA shuts down-VOB remains operational, supporting fault-tolerant designs. |
| AEC-Q100 qualified (Grade 1) | Validated for automotive-grade reliability in onboard chargers and traction inverters-supports PPAP documentation and IMDS/CAMDS compliance. |
Applications
| Industrial Inverters | Solar Microinverters |
|---|---|
|
Use Scenario: Isolated gate drive for dual IGBTs in 3-phase 10 kW industrial VFDs operating at 16 kHz PWM frequency. IC Role / Device Role: Dual-channel isolated driver providing independent, noise-immune control of upper/lower switches in each phase leg. Use Value: 4.0 A peak current ensures full turn-on of 1200 V/100 A IGBTs within 50 ns; 3.75 kVRMS isolation meets IEC 61800-5-1 reinforced insulation requirements. |
Use Scenario: Gate driving dual SiC MOSFETs in interleaved half-bridge microinverter stage with 250 kHz switching. IC Role / Device Role: Dual isolated driver delivering matched timing and high CMTI to prevent cross-conduction in high-dV/dt SiC circuits. Use Value: 45 ns propagation delay and <1 ns inter-channel skew enable precise dead-time control; SOIC-16 narrow-body fits compact 2-layer PCB layouts. |
| Automotive Onboard Chargers | Industrial Motor Control |
|
Use Scenario: Driving high-side/low-side Si MOSFETs in bi-directional AC/DC and DC/DC stages of 11 kW OBC modules. IC Role / Device Role: Dual isolated gate driver enabling independent control of primary-side switches and secondary-side synchronous rectifiers. Use Value: AEC-Q100 Grade 1 qualification and –40°C to +125°C operation ensure reliability in under-hood thermal cycling; 5 V UVLO prevents gate oscillation during cold cranking. |
Use Scenario: Controlling dual N-channel MOSFETs in 48 V BLDC motor drives for industrial automation equipment. IC Role / Device Role: Isolated dual driver replacing optocouplers to eliminate LED aging and temperature drift in closed-loop torque control. Use Value: Silicon isolation provides stable 45 ns delay over lifetime and temperature-improving speed regulation accuracy by ±0.3% vs. opto-based solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8235BD-D-IS1R | Same dual-driver architecture and 4.0 A output, but 5.0 kVRMS isolation and 8 V UVLO threshold. | Better suited for medical or high-altitude industrial systems requiring higher creepage/clearance; less tolerant of low-VDDI brown-out. | Select when UL 5000 VRMS certification is mandatory and system VDDI is stable ≥8 V. |
| ADUM4223BRIZ | Analog Devices iCoupler-based dual isolator with 4 A output, 5 kVRMS rating, but 60 ns propagation delay and no independent UVLO per channel. | Requires external UVLO monitoring circuitry; lower CMTI (75 kV/µs vs. SI8235's >100 kV/µs) limits use in high-noise traction inverter environments. | Choose for legacy iCoupler ecosystem compatibility where slightly slower timing is acceptable and cost-per-isolation-barrier is prioritized. |
Compared with SI8235AC-D-IS1R, Si8235BD-D-IS1R offers higher isolation safety margin at the cost of reduced low-voltage robustness, while ADUM4223BRIZ trades timing precision and integrated UVLO for broader vendor support and mature qualification history in non-automotive industrial settings.
Availability
SI8235AC-D-IS1R is available at Aetrix Electronics and suitable for solar inverters, automotive onboard chargers, and industrial motor control systems requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle assurance.
Supply support for SI8235AC-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 semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, isolation, and timing technologies for high-reliability applications.
The Si823x family was designed specifically for isolated gate driving in high-efficiency power conversion systems-including EV traction inverters, renewable energy inverters, and industrial motor drives-leveraging RF-based silicon isolation for superior speed, noise immunity, and longevity versus optocouplers.
FAQ
What is the isolation voltage rating of SI8235AC-D-IS1R and which safety standards does it meet?
The SI8235AC-D-IS1R has a certified 3.75 kVRMS input-to-output isolation rating per UL 1577. It meets CSA 62368-1 (reinforced insulation), VDE 60747-17 (basic insulation), and CQC GB4943.1 (reinforced insulation) requirements. This makes SI8235AC-D-IS1R suitable for industrial power supplies and solar inverters requiring reinforced insulation without additional external barriers.
Does SI8235AC-D-IS1R support programmable dead time like some other Si823x variants?
No, SI8235AC-D-IS1R does not support programmable dead time or overlap protection because it is a dual-driver (not high-side/low-side) configuration. Its truth table shows immediate output response to input changes-no internal delay is inserted. For dead-time control, SI8233AC-D-IS1R or SI8234AC-D-IS1R must be selected instead.
Can SI8235AC-D-IS1R drive both N-channel and P-channel MOSFETs?
Yes, SI8235AC-D-IS1R can drive both N-channel and P-channel MOSFETs. Its outputs are push-pull capable with 4.0 A source/sink current, and output polarity is determined by external gate resistor and layout-no internal inversion. For high-side P-channel drive, connect VOA to gate, VDDA to source, and GNDA to load return.
What is the minimum recommended VDDI supply voltage for reliable operation of SI8235AC-D-IS1R?
The SI8235AC-D-IS1R specifies a 5 V UVLO rising threshold, so VDDI must exceed 5 V to exit undervoltage lockout and enable normal output operation. Stable operation is guaranteed from 4.5 V to 5.5 V. Below 4.5 V, outputs remain low and inputs are ignored-ensuring fail-safe behavior during MCU power ramp-up or brown-out.
Is SI8235AC-D-IS1R pin-compatible with other Si823x devices in SOIC-16 narrow-body packages?
Yes, SI8235AC-D-IS1R shares identical SOIC-16 narrow-body pinout with all Si823x variants in the IS1/IS1R suffix group-including SI8230AC-D-IS1R, SI8232AC-D-IS1R, and SI8233AC-D-IS1R. Pin functions (VIA, VIB, VOA, VOB, DISABLE, etc.) are consistent across dual-driver and HS/LS versions, enabling layout reuse across current-rating variants.
SI8235AC-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:
- 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:
- 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
SI8235AC-D-IS1R FAQ
1.How can I place an order for SI8235AC-D-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8235AC-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 SI8235AC-D-IS1R reliable?
The price and inventory of SI8235AC-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 SI8235AC-D-IS1R is usually 5 days.
3.What payment methods are accepted for SI8235AC-D-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8235AC-D-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8235AC-D-IS1R?
SI8235AC-D-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8235AC-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 SI8235AC-D-IS1R?
For technical support, including SI8235AC-D-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8235AC-D-IS1R requirements.
6.How does Aetrix verify that SI8235AC-D-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8235AC-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 SI8235AC-D-IS1R meets industry standards.
7.What is the process for return or replacement of SI8235AC-D-IS1R?
All SI8235AC-D-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8235AC-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 SI8235AC-D-IS1R part is unused and in its original packaging.
Return procedure for SI8235AC-D-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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