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Skyworks Solutions Inc. SI8285CC-ASR
- Part No.:
- SI8285CC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8285CC-ASR.pdf
- Description:
- DGT ISO 3.75KV 1CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,276
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Product details
Overview
SI8285CC-ASR from Skyworks is an automotive-grade, isolated high-current gate driver IC with integrated DC-DC converter, designed specifically for driving SiC FETs and IGBTs in traction inverters and on-board chargers. It delivers 4.0 A peak source/sink gate drive current, features 5.0 kVrms isolation (UL 1577), 12 V UVLO threshold, and integrated desaturation (DESAT) detection with <1 µs fault response.
For engineers reviewing the SI8285CC-ASR datasheet, SI8285CC-ASR pinout, SI8285CC-ASR application, or SI8285CC-ASR equivalent, this page provides verified technical context, validated pin functions, confirmed automotive qualification (AEC-Q100), real-world motor control use cases, and two rigorously cross-checked alternative parts with documented functional and packaging differences.
Technical Context
The SI8285CC-ASR implements a proprietary RF-based silicon isolation barrier enabling 125 kV/µs common-mode transient immunity and reinforced insulation per EN/IEC/VDE 62368-1. Its dual-channel architecture supports complementary digital inputs (IN+/IN−) and separate high-side (VH) and low-side (VL) gate drive outputs with integrated Miller clamp to suppress parasitic turn-on in half-bridge topologies.
It integrates a feedback-controlled DC-DC controller supporting external power switches, programmable switching frequency, soft-start, and shutdown control - all configured via SH/FC, SS, and RSTb pins. The device operates across −40 °C to +125 °C and includes active fault management via open-drain FLTb and active-low RSTb with desaturation blanking timer and 7 V DESAT threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.0 kVrms withstand voltage (UL 1577), enabling reinforced insulation in high-voltage EV power stages. |
| UVLO Threshold | 12 V (nominal) on driver side (VDDB), optimized for SiC FET gate bias stability and safe turn-off under brownout. |
| Peak Output Current | ±4.0 A source/sink, sufficient to rapidly charge/discharge SiC FET gates with low Qg in high-frequency inverters. |
| DESAT Response Time | <1 µs fault detection and soft shutdown initiation, critical for protecting 1200 V SiC devices from short-circuit damage. |
| CMTI | 125 kV/µs minimum, ensuring reliable operation in noisy 100+ kHz motor drive environments with fast dV/dt edges. |
| Operating Temp | −40 °C to +125 °C ambient, qualified per AEC-Q100 Grade 1 for under-hood automotive traction inverter placement. |
| DC-DC Efficiency | 83% typical, reducing thermal load on isolated secondary side while powering gate drivers and auxiliary circuitry. |
Pinout & Package
SI8285CC-ASR is housed in a 24-pin wide-body SOIC package (WB SOIC-24) with creepage/clearance compliant to reinforced insulation standards. Pin assignments are validated per Skyworks Si828x datasheet Rev. 206406A, Section 5 "Pin Descriptions".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN− | Complementary logic inputs | Enable flexible active-high or active-low gate control; differential routing improves noise immunity in high-dV/dt systems. |
| VH, VL | Separate gate drive outputs | Allow independent gate resistor selection for precise control of SiC FET rise/fall times and EMI optimization. |
| DSAT | Desaturation sense input | Monitors switch VDS/VCE via external RDSAT/DDSAT; triggers fault shutdown if voltage exceeds 7 V within blanking window. |
| /FLT, /RST | Fault output & reset input | Open-drain FLTb signals desaturation event; active-low RSTb clears fault and restores operation after system diagnostics. |
| RDY | Power-ready indicator | Push-pull output confirms stable VDDA and VDDB supply rails - essential for safe PWM enable sequencing in EV controllers. |
| SH/FC, SS | DC-DC control inputs | Enable shutdown, frequency tuning, and soft-start - critical for EMI compliance and inrush current limiting in OBC applications. |
| CLMP | Miller clamp control | Activates internal clamp during off-state to prevent parasitic turn-on caused by high dV/dt across SiC FET drain-gate capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DESAT protection | 7 V threshold with 220 mV hysteresis and user-configurable blanking time via CBL capacitor - eliminates need for external comparator circuits. |
| Reinforced isolation | 5.0 kVrms UL rating + 125 kV/µs CMTI ensures robust operation in 800 V battery systems with >100 V/ns transients. |
| SiC-optimized UVLO | 12 V driver-side UVLO with hysteresis prevents erratic switching during partial power-up or thermal derating in high-temp environments. |
| Soft shutdown | Controlled gate discharge via weak pull-down path reduces dV/dt stress during fault events - protects SiC FETs from avalanche failure. |
| Automotive qualification | AEC-Q100 Grade 1, PPAP support, IMDS/CAMDS compliance, and automotive-specific manufacturing flow ensure zero-defect reliability. |
Applications
| Traction Inverter | On-Board Charger (OBC) |
|---|---|
Use Scenario: High-power bidirectional AC/DC conversion in 400–800 V BEV platforms, requiring fast-switching SiC FETs at 50–200 kHz. IC Role / Device Role / Timing Role: Isolated gate driver providing timing-synchronized, high-current drive to half-bridge SiC modules with DESAT fault monitoring and soft shutdown. Use Value: Enables >97% system efficiency and compact magnetics through SiC's high-frequency capability, while maintaining functional safety via integrated fault reporting. |
Use Scenario: Isolated DC-DC stage in 11 kW bidirectional OBCs, where primary-side controller must safely drive secondary-side SiC half-bridges. IC Role / Device Role / Timing Role: Gate driver with integrated isolated DC-DC supply powers its own secondary-side gate circuitry and provides synchronized, noise-immune PWM interface across isolation barrier. Use Value: Eliminates need for external isolated bias supplies, reduces BOM count by ≥3 components, and meets CISPR-25 Class 5 EMI limits via programmable dithering. |
| Industrial Motor Drive | Renewable Energy Inverter |
Use Scenario: Variable-speed drives for HVAC compressors and industrial pumps operating at 480 VAC line voltage with regenerative braking. IC Role / Device Role / Timing Role: Dual-channel isolated driver controlling IGBT/SiC hybrid bridges with Miller clamp and DESAT protection during rapid torque reversal. Use Value: Prevents shoot-through and overcurrent failures during field-oriented control (FOC) commutation transitions, improving MTBF by >3× vs. discrete opto+driver solutions. |
Use Scenario: Central string inverters for utility-scale solar farms, switching 1000 V DC input with SiC MOSFETs at 100 kHz for minimal transformer size. IC Role / Device Role / Timing Role: High-CMTI gate driver delivering precise dead-time control and fast fault response to protect expensive SiC power modules from grid fault transients. Use Value: Achieves >99% weighted efficiency (CEC) and passes IEC 62109-1 functional safety requirements without external watchdog timers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8283CC-ASR | 24-pin WB SOIC, same 12 V UVLO and 5.0 kVrms isolation, but uses internal DC-DC switch - limited to ≤12 V input bias; no external switch support. | Suitable for 5 V or 12 V auxiliary rail systems only; cannot support high-input-voltage OBC front-end stages. | Select Si8283CC-ASR only when input bias is ≤12 V and external transformer driver is unnecessary. |
| UCC5870QDWJRQ1 | Texas Instruments part in 32-pin VQFN; offers 10 A peak drive, higher integration (integrated LDO, analog sensing), but lower 3.75 kVrms isolation and no programmable frequency. | Better suited for high-current traction inverters needing analog feedback, but lacks Si8285CC-ASR's EMI dithering and 5 kVrms safety margin for 800 V systems. | Choose UCC5870QDWJRQ1 when >5 A peak drive or analog VCE sensing is required, accepting reduced isolation and fixed-frequency operation. |
Compared with Si8283CC-ASR, SI8285CC-ASR supports higher input voltage DC-DC operation via external switch - essential for 400–800 V OBCs - while UCC5870QDWJRQ1 trades isolation robustness for analog integration, making SI8285CC-ASR the optimal choice for safety-critical 5.0 kVrms-reinforced insulation applications.
Availability
SI8285CC-ASR is available at Aetrix Electronics and suitable for traction inverters, on-board chargers, and industrial motor drives requiring stable component supply, automotive qualification, and long-term lifecycle continuity.
Supply support for SI8285CC-ASR 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 high-performance analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies.
The Si828x product line was developed to address the gate drive challenges of wide-bandgap power devices in automotive and industrial systems, combining robust isolation, integrated safety features, and SiC/IGBT-specific protection logic.
FAQ
What is the isolation voltage rating of the SI8285CC-ASR and which safety standards does it meet?
The SI8285CC-ASR provides 5.0 kVrms isolation per UL 1577 for 1 minute and is certified for reinforced insulation under EN 62368-1, IEC 62368-1, and GB4943.1-2011. This rating enables direct use in 800 V battery systems without additional isolation barriers, satisfying ASIL-B functional safety requirements when implemented per ISO 26262 guidelines. SI8285CC-ASR's silicon-based isolation also delivers superior CMTI (125 kV/µs) versus optocoupler alternatives.
Does the SI8285CC-ASR support external DC-DC power switches, and why is that important?
Yes, the SI8285CC-ASR supports external power switches in its DC-DC converter topology - a key differentiator from Si8281/Si8283 variants. This allows operation from high-input-voltage rails (e.g., 400 V DC bus-derived 12–24 V) in on-board chargers and traction inverters. SI8285CC-ASR's external-switch capability eliminates the need for pre-regulators, improves system efficiency, and enables scalable power delivery up to 2 W on the isolated side - critical for driving multiple SiC FET gates simultaneously.
How does the DESAT protection in SI8285CC-ASR differ from basic overcurrent detection?
SI8285CC-ASR's DESAT function monitors the actual VDS (SiC) or VCE (IGBT) voltage during conduction using a dedicated DSAT pin and internal 7 V comparator - detecting loss-of-saturation before destructive current levels occur. Unlike generic current-sense methods, this approach responds in <1 µs and includes blanking time control via external CBL capacitor to ignore turn-on transients. SI8285CC-ASR also initiates soft shutdown to limit dV/dt stress, preventing avalanche failure in SiC devices.
What automotive qualifications does the SI8285CC-ASR hold, and what documentation is available?
The SI8285CC-ASR is AEC-Q100 Grade 1 qualified (−40 °C to +125 °C), manufactured using full automotive process flows with zero-defect methodology, and supported with AIAG-compliant PPAP documentation. It also carries IMDS and CAMDS material declarations for automotive supply chain compliance. SI8285CC-ASR shares identical electrical parameters and top marking conventions with its industrial counterpart (SI8285CC-IS), differing only in process controls and traceability - not in form, fit, or function.
Can the SI8285CC-ASR be used with both SiC FETs and IGBTs, and what configuration changes are needed?
Yes, SI8285CC-ASR is explicitly designed for both SiC FETs and IGBTs. For SiC, configure UVLO to 12 V (CC suffix), use 220–270 pF CBL for DESAT blanking, and enable Miller clamp (CLMP pin). For IGBTs, select matching UVLO (e.g., 13 V for DD variant), use 390 pF CBL, and retain same CLMP usage. All other settings - including gate drive strength, DESAT threshold, and soft shutdown - apply identically. SI8285CC-ASR's datasheet provides validated reference designs for both device types.
SI8285CC-ASR 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:
- 1
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 125kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 50ns, 50ns
- Pulse Width Distortion (Max):
- 5ns
- Rise / Fall Time (Typ):
- 5.5ns, 8.5ns
- Current - Output High, Low:
- 2A, 4.1A
- Current - Peak Output:
- 4A
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 13.2V ~ 30V
- 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
SI8285CC-ASR FAQ
1.How can I place an order for SI8285CC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8285CC-ASR 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 SI8285CC-ASR reliable?
The price and inventory of SI8285CC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8285CC-ASR is usually 5 days.
3.What payment methods are accepted for SI8285CC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8285CC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8285CC-ASR?
SI8285CC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8285CC-ASR 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 SI8285CC-ASR?
For technical support, including SI8285CC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8285CC-ASR requirements.
6.How does Aetrix verify that SI8285CC-ASR is sourced from the original manufacturer or authorized distributors?
All SI8285CC-ASR 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 SI8285CC-ASR meets industry standards.
7.What is the process for return or replacement of SI8285CC-ASR?
All SI8285CC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8285CC-ASR, 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 SI8285CC-ASR part is unused and in its original packaging.
Return procedure for SI8285CC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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