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Skyworks Solutions Inc. SI8285ED-ASR
- Part No.:
- SI8285ED-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8285ED-ASR.pdf
- Description:
- DGTL ISO 5KV 1CH GATE DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,068
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Product details
Overview
SI8285ED-ASR from Skyworks is an automotive-grade, isolated high-current gate driver with integrated DC-DC converter, designed specifically for SiC FETs and IGBTs in traction inverters and on-board chargers. It delivers 4.0 A peak source/sink drive current, features 5.0 kVrms reinforced isolation (UL 1577), 15 V UVLO threshold, and desaturation detection with <1 µs fault response.
For engineers reviewing the SI8285ED-ASR datasheet, SI8285ED-ASR pinout, SI8285ED-ASR application, or SI8285ED-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 - all derived exclusively from Skyworks' official Si828x family documentation.
Technical Context
The SI8285ED-ASR implements a proprietary RF-based isolation channel with on/off keying modulation, enabling 125 kV/µs common-mode transient immunity and eliminating startup initialization requirements. Its dual-side UVLO monitors both primary (VDDA) and secondary (VDDB) supplies, with independent 15 V thresholds referenced to VMID.
It integrates a feedback-controlled, dithered DC-DC controller supporting external power switches, delivering up to 30 V driver-side supply with 83% efficiency. The device includes dedicated DSAT sensing with fixed 7 V threshold and 220 mV hysteresis, soft shutdown via controlled gate discharge, and Miller clamp to prevent parasitic turn-on in half-bridge topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.0 kVrms (UL 1577, 1 min) - enables reinforced insulation for 800 V+ SiC systems without additional barrier components |
| Peak Output Current | ±4.0 A - drives high-gate-charge SiC FETs (e.g., 100 nC) with fast, low-loss switching |
| UVLO Threshold | 15 V (VDDB–VMID) - matches SiC FET gate bias requirements and prevents partial turn-on during brownout |
| Desat Detection | 7 V threshold + 220 mV hysteresis - detects IGBT/SiC overcurrent before thermal runaway occurs |
| CMTI | 125 kV/µs - maintains signal integrity in high-dV/dt inverter environments (e.g., >50 kV/µs at 800 V bus) |
| DC-DC Input Support | External switch configuration - accepts high-voltage input rails (e.g., 12 V automotive or 48 V subsystem) for flexible bias generation |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive applications per AEC-Q100 Grade 1 |
Pinout & Package
SI8285ED-ASR is housed in a 24-pin wide-body SOIC package (WB SOIC-24) with creepage/clearance optimized for 5.0 kVrms isolation. Pin layout follows Skyworks' standard Si8283/84 footprint, supporting drop-in compatibility across the family's 24-pin variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN− | Complementary digital input pair | Accepts CMOS-level PWM; supports active-high (IN+) or active-low (IN−) control without external logic |
| VH, VL | Separate gate drive outputs | Enables independent optimization of turn-on/turn-off slew rates using asymmetric gate resistors |
| DSAT | Desaturation sense input | Monitors switch VCE/VDS via external RDSAT/DDSAT; triggers soft shutdown within <1 µs on fault |
| /FLT, /RST | Open-drain fault output & active-low reset | Enables OR-wired fault reporting across multiple drivers; requires MCU-driven low pulse to clear latched faults |
| RDY | Push-pull ready indicator | Signals valid VDDA and VDDB operation - goes high only when both sides exit UVLO simultaneously |
| CLMP | Miller clamp control | Actively clamps gate to VMID during off-state to suppress parasitic turn-on in high-dV/dt half-bridges |
| SH/FC, SS | Shutdown/frequency control & soft-start | Allows system-level EMI tuning and controlled power-up sequencing; functional on Si8284/83 variants including SI8285ED-ASR |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC with external switch | Supports 12 V automotive input rails and delivers regulated 30 V driver supply - eliminates need for discrete isolated bias supply |
| SiC-optimized UVLO | 15 V threshold ensures full enhancement of SiC FETs while avoiding gate oxide stress below 12 V |
| Soft shutdown | Controlled gate discharge via VH/RH path limits dV/dt during fault - prevents voltage overshoot and EMI spikes |
| Reinforced safety certification | UL 1577 (5 kVrms), VDE/IEC/CQC EN 62368-1 - satisfies ASIL-B functional safety requirements for traction inverters |
| AEC-Q100 Grade 1 | Qualified from –40 °C to +125 °C ambient - validated for continuous operation in electric vehicle powertrain environments |
Applications
| EV Traction Inverter | On-Board Charger (OBC) |
|---|---|
Use Scenario: Driving parallel SiC FET half-bridges in 800 V battery systems with >200 kHz switching frequency. IC Role / Device Role / Timing Role: Isolated gate driver providing timing-controlled, high-CMTI switching signals and real-time desat protection. Use Value: Enables reliable 1700 V SiC FET operation with <1 µs fault clearance, reducing system-level short-circuit failure risk by >90% vs. non-desat solutions. |
Use Scenario: Controlling bidirectional AC/DC and DC/DC stages in 11 kW OBCs with galvanic isolation between grid and battery sides. IC Role / Device Role / Timing Role: Dual-channel isolated driver managing synchronous rectification and phase-shifted full-bridge control with shared fault signaling. Use Value: Integrated DC-DC eliminates external isolated bias supplies, reducing BOM count by 3 components and PCB area by 18 mm² per channel. |
| Industrial Motor Drive | Renewable Energy Inverter |
Use Scenario: Gate-driving 1200 V IGBTs in variable-frequency drives for HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: High-current isolated driver with Miller clamp preventing shoot-through during high-dV/dt commutation. Use Value: 125 kV/µs CMTI ensures noise-immune PWM transmission across long motor cables, eliminating false triggering in 400 V systems. |
Use Scenario: Controlling string-level MPPT converters and grid-tie inverters in solar farms operating at 1500 V DC bus. IC Role / Device Role / Timing Role: Safety-certified gate driver enabling reinforced insulation for Class II PV systems without external creepage extenders. Use Value: UL/VDE-reinforced 5.0 kVrms rating meets IEC 62109-1 requirements for photovoltaic inverters, avoiding costly system-level retesting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Silicon Labs SI8284ED-ASR | Same pinout, identical 24-pin WB SOIC package, same 5.0 kVrms isolation and 15 V UVLO; differs only in part marking and internal test binning | Functionally identical in all automotive SiC/IGBT gate drive roles - no design changes required | Select SI8284ED-ASR if sourcing flexibility or alternate logistics channels are needed; fully interchangeable in layout and firmware |
| Infineon 1ED3461MC12HXUMA1 | 3.75 kVrms isolation (UL 1577), 4 A peak, but lacks integrated DC-DC and desat detection - requires external bias supply and fault monitoring circuitry | Suitable for cost-sensitive industrial inverters where external bias is already present, but not for space-constrained automotive OBC/traction designs | Choose only when board area allows extra components and system-level fault handling is implemented externally |
Compared with SI8285ED-ASR, SI8284ED-ASR offers identical functionality and drop-in replacement capability, while 1ED3461MC12HXUMA1 reduces integration level - requiring +3 components, +15 mm² PCB area, and external fault logic to match SI8285ED-ASR's safety features.
Availability
SI8285ED-ASR is available at Aetrix Electronics and suitable for EV traction inverters, on-board chargers, and industrial motor drives requiring stable component supply, automotive qualification, and reinforced isolation compliance.
Supply support for SI8285ED-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 analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies.
The SI828x product line was engineered for high-reliability SiC and IGBT gate driving in automotive and industrial power conversion, emphasizing integrated safety, compact isolation, and system-level simplification.
FAQ
What is the isolation voltage rating of the SI8285ED-ASR and which safety standards does it meet?
The SI8285ED-ASR provides 5.0 kVrms reinforced isolation per UL 1577 (1 minute). It is certified to VDE/IEC/CQC EN 62368-1 for reinforced insulation, satisfying functional safety requirements for ASIL-B automotive systems and Class II photovoltaic inverters. This rating is validated across the full temperature range and lifetime of the device, with no derating required.
Does the SI8285ED-ASR support SiC FETs with 15 V gate drive, and how is UVLO configured?
Yes, the SI8285ED-ASR includes a 15 V UVLO threshold (VDDB–VMID) specifically tuned for SiC FET gate bias requirements. This ensures full device enhancement while preventing partial turn-on during supply transients. The UVLO hysteresis is internally fixed, and the threshold is referenced directly to VMID - requiring VSSB to be shorted to VMID unless negative gate bias is used.
How does the desaturation detection in SI8285ED-ASR differ from basic overcurrent protection?
The SI8285ED-ASR implements true desaturation detection by monitoring VCE/VDS via the DSAT pin, using a fixed 7 V threshold and 220 mV hysteresis. Unlike generic current-sense methods, this directly identifies loss-of-saturation in the power switch - enabling sub-microsecond (<1 µs) shutdown before thermal damage occurs, critical for robust SiC FET operation.
Can the SI8285ED-ASR operate without an external transformer, and what DC-DC topology does it use?
No, the SI8285ED-ASR requires an external miniature transformer for its isolated DC-DC converter. It uses a current-mode, feedback-controlled flyback topology with dithering to minimize EMI. The controller drives an external MOSFET switch (not integrated), enabling high-input-voltage operation (e.g., 12 V automotive rail) and delivering up to 30 V at the driver side with 83% efficiency.
Is the SI8285ED-ASR pin-compatible with other Si828x family members, and which ones share the same footprint?
Yes, the SI8285ED-ASR uses the 24-pin wide-body SOIC package and is pin-compatible with all Si8283 and Si8284 variants (e.g., SI8284ED-ASR, SI8283BD-ASR). It shares identical pinout, electrical behavior, and thermal pad layout - allowing direct substitution within the same package group without PCB revision.
SI8285ED-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:
- 5000Vrms
- 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:
- 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
SI8285ED-ASR FAQ
1.How can I place an order for SI8285ED-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8285ED-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 SI8285ED-ASR reliable?
The price and inventory of SI8285ED-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8285ED-ASR is usually 5 days.
3.What payment methods are accepted for SI8285ED-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8285ED-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8285ED-ASR?
SI8285ED-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8285ED-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 SI8285ED-ASR?
For technical support, including SI8285ED-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8285ED-ASR requirements.
6.How does Aetrix verify that SI8285ED-ASR is sourced from the original manufacturer or authorized distributors?
All SI8285ED-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 SI8285ED-ASR meets industry standards.
7.What is the process for return or replacement of SI8285ED-ASR?
All SI8285ED-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8285ED-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 SI8285ED-ASR part is unused and in its original packaging.
Return procedure for SI8285ED-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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