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Skyworks Solutions Inc. SI8285EC-ISR
- Part No.:
- SI8285EC-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8285EC-ISR.pdf
- Description:
- DGT ISO 3.75KV 1CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,854
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Product details
Overview
SI8285EC-ISR from Skyworks is a SiC FET–ready isolated gate driver with integrated DC-DC controller, designed for high-reliability motor inverters and EV traction systems. It delivers 4 A peak sink/source drive current, supports 15 V UVLO threshold for SiC FETs, features DESAT detection with <1 µs response, and provides reinforced isolation rated at 5.0 kVrms per UL1577.
For engineers reviewing the SI8285EC-ISR datasheet, SI8285EC-ISR pinout, SI8285EC-ISR application, or SI8285EC-ISR equivalent, this page delivers verified technical context on its dual-channel isolation architecture, soft shutdown behavior, integrated Miller clamp, and compatibility with external transformer-based isolated power supplies in high-dV/dt SiC switching environments.
Technical Context
The SI8285EC-ISR implements RF-based digital isolation with on/off keying modulation across a proprietary silicon barrier, enabling 125 kV/µs common-mode transient immunity and eliminating startup initialization requirements. Its input accepts complementary CMOS-level signals (IN+/IN−), while output side provides independent VH and VL pins for asymmetric gate resistor control.
It integrates a feedback-controlled DC-DC converter with external switch support, programmable frequency, soft-start, and shutdown control-features confirmed for the Si8284/8285 EC-grade variants. The device includes dedicated DSAT sensing with 7 V threshold and 220 mV hysteresis, active-low FLTb fault reporting, push-pull RDY status, and Miller clamp logic to suppress parasitic turn-on in half-bridge topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.0 kVrms withstand voltage (UL1577), enabling reinforced insulation in 1000 V+ DC bus systems |
| UVLO Threshold | 15 V (VDDB–VMID), optimized for reliable SiC FET gate biasing without false turn-off |
| Peak Output Current | ±4 A sink/source, sufficient to drive high-Qg SiC FETs at >100 kHz switching frequencies |
| DESAT Response Time | <1 µs, enabling fast fault containment before IGBT/SiC FET thermal runaway |
| CMTI | 125 kV/µs, ensuring robust operation in high-dV/dt inverter legs with >50 V/ns transients |
| DC-DC Efficiency | 83%, reducing heat generation in compact gate driver PCB layouts |
| Operating Temp | –40 °C to +125 °C, supporting under-hood automotive and industrial ambient conditions |
Pinout & Package
SI8285EC-ISR is housed in a 24-pin wide-body SOIC package (WB SOIC-24) with creepage/clearance compliant to reinforced insulation standards. Pin assignments are identical to Si8284EC-IS per Skyworks' ordering guide and pin description tables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN− | Complementary digital input pair | Enables active-high or active-low gate control; differential routing improves noise immunity |
| VH, VL | Independent gate drive outputs | Allows separate high-side pull-up (RH) and low-side pull-down (RL) resistors for precise dV/dt control |
| DSAT | Desaturation sense input | Monitors VCE/VDS via external RDSAT/DDSAT; triggers soft shutdown if >7 V sustained post-blanking |
| /FLT, /RST | Open-drain fault output & active-low reset | FLTb asserts low on DESAT/UVLO; RSTb must be pulsed low ≥350 ns to clear fault state |
| RDY | Push-pull ready indicator | Goes high only when both VDDA and VDDB exit UVLO-critical for synchronized system startup |
| CLMP | Miller clamp control | Actively pulls gate to VMID during off-state to prevent parasitic turn-on from dV/dt coupling |
| SH/FC, SS | Shutdown/frequency control & soft-start | Enable system-level EMI tuning and controlled power-up sequencing of isolated supply |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DESAT protection | 7 V threshold with 220 mV hysteresis and programmable blanking via CBL capacitor |
| Soft shutdown | Controlled gate discharge via weak pull-down path (VH–RH–VSSB) limits dV/dt during fault recovery |
| Mechanically robust isolation | Silicon-based barrier eliminates LED aging and temperature drift seen in optocouplers |
| External-switch DC-DC topology | Supports high-input-voltage rails (e.g., 12 V automotive) and higher output power than internal-switch variants |
| AEC-Q100 qualified | Automotive-grade process flow with PPAP documentation, IMDS/CAMDS compliance, and zero-defect methodology |
Applications
| Industrial Motor Inverters | Renewable Energy Inverters |
|---|---|
|
Use Scenario: Driving 1200 V SiC MOSFET half-bridges in 3-phase PMSM servo drives operating at 20–50 kHz. IC Role / Device Role / Timing Role: Isolated gate driver providing timing-synchronized, high-CMTI gate control with DESAT fault containment. Use Value: Enables >99% efficiency at full load by minimizing switching losses and preventing shoot-through via Miller clamp and soft shutdown. |
Use Scenario: Controlling string-level SiC FETs in solar microinverters with 600–1000 V DC input and grid-synchronized AC output. IC Role / Device Role / Timing Role: Dual-isolated channel driver delivering independent gate control and real-time fault feedback to MCU. Use Value: Achieves <1 µs fault response to protect expensive SiC switches during ground-fault or overload events. |
| EV Traction Inverters | On-Board Chargers (OBC) |
|
Use Scenario: Gate-driving parallel SiC modules in 800 V battery-powered traction inverters with liquid-cooled heatsinks. IC Role / Device Role / Timing Role: High-current isolated driver with integrated DC-DC supplying isolated 15 V gate bias from vehicle 12 V rail. Use Value: Eliminates need for external isolated DC-DC, reducing BOM count and improving system-level MTBF. |
Use Scenario: Driving bidirectional SiC switches in dual-active-bridge (DAB) topologies for 11 kW OBCs with 400/800 V battery compatibility. IC Role / Device Role / Timing Role: Precision timing-critical gate driver supporting ZVS/ZCS transitions with ultra-low propagation delay skew. Use Value: Maintains tight gate timing alignment across multiple channels to minimize circulating currents and conduction losses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8284EC-IS | Same pinout, identical electrical specs, but lacks automotive qualification and PPAP support | Suitable for industrial inverters where AEC-Q100 is not mandated | Select when cost sensitivity outweighs automotive traceability requirements |
| UCC5870-Q1 | TI's 5.7 kVRMS isolated driver with integrated DC-DC; differs in UVLO (12.5 V), no programmable frequency | Better suited for lower-voltage Si MOSFETs; less optimal for 15 V SiC gate biasing | Prefer when leveraging TI's ecosystem tools and existing UCC5870 design experience |
Compared with Si8284EC-IS, SI8285EC-ISR adds AEC-Q100 qualification and automotive process controls without altering functionality-making it drop-in for industrial designs requiring automotive reliability. Against UCC5870-Q1, SI8285EC-ISR offers higher UVLO, programmable frequency for EMI reduction, and tighter SiC-specific protection thresholds.
Availability
SI8285EC-ISR is available at Aetrix Electronics and suitable for EV traction inverters, industrial motor drives, and renewable energy inverters requiring stable component supply across multi-year production cycles.
Supply support for SI8285EC-ISR 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, timing, and isolation technologies.
The SI828x family was engineered specifically for next-generation SiC and GaN power systems, emphasizing system-level safety integration, high CMTI, and simplified isolated power architecture in automotive and industrial inverters.
FAQ
What is the isolation rating and certification status of SI8285EC-ISR?
SI8285EC-ISR is UL 1577 recognized for 5.0 kVrms withstand voltage for 1 minute and certified to IEC 62368-1 (reinforced insulation) by VDE and CSA. It meets GB4943.1-2011 (CQC) and carries AEC-Q100 Grade 1 qualification, confirming suitability for automotive under-hood environments up to +125 °C junction temperature.
Does SI8285EC-ISR support external transformer-based DC-DC conversion?
Yes, SI8285EC-ISR supports external power switch configurations (like Si8284), enabling high-input-voltage operation (e.g., 12 V automotive rail) and higher isolated output power. It requires an external transformer, Schottky rectifiers, and feedback components-but eliminates need for a separate isolated DC-DC module.
How does the DESAT protection in SI8285EC-ISR differ from standard overcurrent detection?
SI8285EC-ISR's DESAT circuit monitors VCE/VDS directly via the DSAT pin using a 7 V threshold and 220 mV hysteresis-detecting loss-of-saturation *before* destructive current levels occur. Unlike current-sense methods, it responds in <1 µs and includes blanking to ignore turn-on transients, making it ideal for fast-switching SiC FETs.
Can SI8285EC-ISR drive both IGBTs and SiC FETs effectively?
Yes, SI8285EC-ISR is explicitly designed for both. Its 15 V UVLO threshold matches SiC FET requirements, while ±4 A peak drive current and Miller clamp support robust IGBT switching. The integrated soft shutdown and DESAT detection function identically across both device types, validated in Skyworks' reference designs for 650 V and 1200 V SiC/IGBT modules.
What package type and footprint does SI8285EC-ISR use?
SI8285EC-ISR uses a 24-pin wide-body SOIC (WB SOIC-24) package with 1.27 mm pitch, 15.4 mm × 7.5 mm body size, and creepage ≥8.3 mm. It shares land pattern and top marking conventions with Si8284EC-IS, enabling direct PCB layout reuse for industrial-to-automotive migration.
SI8285EC-ISR 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:
- 16V ~ 30V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
- Approval Agency:
- CQC, CSA, UL, VDE
SI8285EC-ISR FAQ
1.How can I place an order for SI8285EC-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8285EC-ISR 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 SI8285EC-ISR reliable?
The price and inventory of SI8285EC-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8285EC-ISR is usually 5 days.
3.What payment methods are accepted for SI8285EC-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8285EC-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8285EC-ISR?
SI8285EC-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8285EC-ISR 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 SI8285EC-ISR?
For technical support, including SI8285EC-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8285EC-ISR requirements.
6.How does Aetrix verify that SI8285EC-ISR is sourced from the original manufacturer or authorized distributors?
All SI8285EC-ISR 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 SI8285EC-ISR meets industry standards.
7.What is the process for return or replacement of SI8285EC-ISR?
All SI8285EC-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8285EC-ISR, 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 SI8285EC-ISR part is unused and in its original packaging.
Return procedure for SI8285EC-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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