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Skyworks Solutions Inc. SI8235AB-C-IS1R
- Part No.:
- SI8235AB-C-IS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8235AB-C-IS1R.pdf
- Description:
- DGTL ISO 2.5KV 2CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,531
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Product details
Overview
SI8235AB-C-IS1R from Silicon Labs is a dual-channel isolated gate driver IC with 4.0 A peak output current per channel, 5 kVRMS input-to-output isolation (wide-body SOIC-16), 60 ns max propagation delay, and operation from –40 to +125 °C. It serves as a dual independent driver for high-side/low-side MOSFET or IGBT control in isolated power converters and motor drives.
For engineers reviewing the SI8235AB-C-IS1R datasheet, SI8235AB-C-IS1R pinout, SI8235AB-C-IS1R application, or SI8235AB-C-IS1R equivalent, key selection criteria include its 4.0 A sink/source capability, programmable dead time support (via external resistor), 45 kV/µs CMTI, dual-channel independence, and UL/VDE/CSA safety certifications for reinforced insulation.
Technical Context
The SI8235AB-C-IS1R implements RF-based on/off keying across a silicon isolation barrier-enabling robust noise immunity without startup initialization. Each channel operates independently with separate VDDA/GNDA and VDDB/GNDB supplies, supporting grounded or floating output configurations.
It features TTL-compatible inputs with 400 mV hysteresis, undervoltage lockout on both input (VDDI) and driver (VDDA/VDDB) rails, and internal overlap protection logic that prevents shoot-through during simultaneous high-state transitions-critical for half-bridge topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Output Current | 4.0 A per channel - enables direct drive of high-gate-charge MOSFETs/IGBTs without external buffers |
| Isolation Rating | 5 kVRMS (1 min, UL 1577) - certified for reinforced insulation in industrial and medical systems |
| Propagation Delay | ≤60 ns - supports >8 MHz switching frequency with tight timing control |
| CMTI | ≥45 kV/µs - ensures reliable operation in high-dv/dt environments like motor drives and inverters |
| Operating Temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| Input Hysteresis | 400 mV - rejects noise on control lines without external Schmitt triggers |
| Supply Voltage Range | VDDI: 2.7–5.5 V; VDDA/VDDB: 6.5–24 V - accommodates diverse controller and gate-drive rail architectures |
Pinout & Package
SI8235AB-C-IS1R is housed in a RoHS-compliant 16-pin wide-body SOIC package (WBSOIC-16), providing 8.0 mm creepage and clearance for 5 kVRMS isolation compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Input-side pins (VDDI, GNDI, VIA, VIB, DISABLE) | Isolated input domain: powers logic interface and receives control signals; DISABLE asserts low-side outputs to low |
| 9, 10, 11, 12, 13, 14, 15, 16 | Output-side pins (VDDA, GNDA, VOA, VDDB, GNDB, VOB) | Isolated output domain: dual independent gate-drive channels with separate supplies and grounds |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent isolated channels | No shared ground or supply dependency - enables asymmetric topologies (e.g., high-side + floating low-side) |
| 45 kV/µs common-mode transient immunity | Prevents false triggering in noisy power stages with fast-switching SiC/GaN devices |
| Programmable dead time (70–900 ns) | Configurable via single external resistor - eliminates need for external timing ICs in half-bridge designs |
| AEC-Q100 qualified | Validated for automotive-grade reliability (Grade 1: –40 to +125 °C junction) |
| UL/VDE/CSA/GB4943.1 certified | Meets reinforced insulation requirements for functional safety-critical applications |
Applications
| Motor Control Systems | Isolated DC-DC Power Supplies |
|---|---|
Use Scenario: Driving high-voltage half-bridge IGBTs in HVAC compressor inverters. IC Role / Device Role / Timing Role: Dual isolated gate driver delivering 4.0 A peak current to switch IGBTs at 15 kHz with <60 ns channel matching. Use Value: Eliminates optocoupler latency and aging; enables precise dead-time control to prevent shoot-through under thermal drift. | Use Scenario: Gate driving synchronous rectifiers in 1 kW isolated LLC resonant converters. IC Role / Device Role / Timing Role: Isolated dual driver controlling primary-side high-side and secondary-side low-side MOSFETs with independent supply domains. Use Value: 5 kVRMS isolation meets IEC 62368-1 reinforced insulation; 45 kV/µs CMTI sustains regulation during transformer leakage transients. |
| Solar Inverters | Industrial Motor Drives |
Use Scenario: Controlling three-phase IGBT stacks in string inverters with 1000 V DC input. IC Role / Device Role / Timing Role: Dual-channel driver per phase leg, operating with split 15 V gate supplies and UVLO monitoring on both sides. Use Value: AEC-Q100 qualification ensures long-term reliability in outdoor deployments; programmable dead time adapts to varying gate charge profiles. | Use Scenario: Driving 650 V SiC MOSFETs in servo amplifier output stages. IC Role / Device Role / Timing Role: High-speed dual driver enabling >100 kHz PWM with matched propagation delay across channels. Use Value: 60 ns max tPLH/tPHL and <5.6 ns pulse-width distortion maintain PWM fidelity critical for torque ripple reduction. |
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 |
|---|---|---|---|
| Si8235AD-C-IS1R | Same pinout and specs, but rated for 2.5 kVRMS isolation (narrow-body SOIC-16) | Lower isolation voltage limits use in <600 VRMS working voltage systems only | Select when cost-sensitive designs accept reduced creepage/clearance and lack regulatory requirement for 5 kVRMS |
| UCC5390SCD | 3.5 A peak output, 3.75 kVRMS isolation, integrated Miller clamp, no programmable dead time | Lacks dead-time programming; requires external circuitry for overlap protection | Choose when Miller clamping is mandatory and dead-time tuning is handled externally or not required |
Compared with Si8235AD-C-IS1R and UCC5390SCD, SI8235AB-C-IS1R uniquely delivers 5 kVRMS isolation in wide-body SOIC with on-chip programmable dead time-reducing BOM count and layout complexity in high-reliability industrial and solar applications.
Availability
SI8235AB-C-IS1R is available at Aetrix Electronics and suitable for motor control systems, isolated dc-dc power supplies, solar inverters, and industrial motor drives requiring stable component supply, long-lifecycle assurance, and full regulatory certification traceability.
Supply support for SI8235AB-C-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
Silicon Labs is a fabless semiconductor company specializing in precision timing, isolation, and mixed-signal ICs for industrial, automotive, and communications markets.
The Si823x family was designed specifically for high-reliability isolated gate driving in power conversion systems-emphasizing noise immunity, safety certification, and thermal robustness across extended temperature ranges.
FAQ
What is the maximum isolation voltage rating for SI8235AB-C-IS1R?
SI8235AB-C-IS1R is rated for 5 kVRMS input-to-output isolation per UL 1577 (1 minute test), verified on the wide-body SOIC-16 package. This corresponds to 6500 VRMS production test level and qualifies it for reinforced insulation per IEC 60950-1, IEC 61010-1, and IEC 60601-1 standards. The 5 kVRMS rating applies only to WBSOIC-16 variants-not narrow-body or LGA packages.
Does SI8235AB-C-IS1R support programmable dead time?
Yes, SI8235AB-C-IS1R supports programmable dead time via an external resistor connected to the DT pin. Dead time can be adjusted from 70 ns to 900 ns depending on resistor value (6 kΩ to 100 kΩ). This feature is implemented in hardware and does not require firmware or configuration registers-making it deterministic and immune to software faults.
What are the supply voltage requirements for SI8235AB-C-IS1R?
SI8235AB-C-IS1R requires three independent supplies: VDDI (2.7–5.5 V) for the input side, and VDDA/VDDB (6.5–24 V each) for the two output channels. All supplies must be decoupled with low-ESR capacitors placed near their respective pins. VDDA and VDDB may be tied together only if both outputs share the same ground reference and voltage level.
Is SI8235AB-C-IS1R AEC-Q100 qualified?
Yes, SI8235AB-C-IS1R is AEC-Q100 qualified for Grade 1 (–40 °C to +125 °C ambient), including stress testing for HTOL, TC, UHAST, and ESD. This qualification covers the full device-including isolation barrier, driver stages, and logic interface-and confirms suitability for automotive powertrain and chassis applications where reliability under thermal cycling and vibration is critical.
How does SI8235AB-C-IS1R handle undervoltage lockout (UVLO)?
SI8235AB-C-IS1R implements independent UVLO on all three supply domains: VDDI (threshold ~4.0 V), VDDA (~5.8 V), and VDDB (~5.8 V). When any supply drops below its UVLO threshold, the corresponding outputs are forced low. The hysteresis is 250 mV on VDDI and ~280–1000 mV on VDDA/VDDB depending on UVLO version. Outputs remain disabled until all supplies recover and stabilize.
SI8235AB-C-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:
- Obsolete
- 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
SI8235AB-C-IS1R FAQ
1.How can I place an order for SI8235AB-C-IS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8235AB-C-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 SI8235AB-C-IS1R reliable?
The price and inventory of SI8235AB-C-IS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8235AB-C-IS1R is usually 5 days.
3.What payment methods are accepted for SI8235AB-C-IS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8235AB-C-IS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8235AB-C-IS1R?
SI8235AB-C-IS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8235AB-C-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 SI8235AB-C-IS1R?
For technical support, including SI8235AB-C-IS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8235AB-C-IS1R requirements.
6.How does Aetrix verify that SI8235AB-C-IS1R is sourced from the original manufacturer or authorized distributors?
All SI8235AB-C-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 SI8235AB-C-IS1R meets industry standards.
7.What is the process for return or replacement of SI8235AB-C-IS1R?
All SI8235AB-C-IS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8235AB-C-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 SI8235AB-C-IS1R part is unused and in its original packaging.
Return procedure for SI8235AB-C-IS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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