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Skyworks Solutions Inc. SI8285EC-ASR
- Part No.:
- SI8285EC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8285EC-ASR.pdf
- Description:
- DGT ISO 3.75KV 1CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,174
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Product details
Overview
SI8285EC-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, supports 15 V UVLO threshold, provides desaturation detection with <1 µs fault response, and features reinforced isolation rated at 5.0 kVrms per UL1577.
For engineers reviewing the SI8285EC-ASR datasheet, SI8285EC-ASR pinout, SI8285EC-ASR application, or SI8285EC-ASR equivalent, this page delivers 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 grounded in Skyworks' official Si828x family documentation.
Technical Context
The SI8285EC-ASR implements a proprietary RF-based silicon isolation barrier enabling 125 kV/µs common-mode transient immunity and stable timing across temperature. Its dual-output architecture separates VH (gate pull-up) and VL (gate pull-down) paths to enable independent gate resistor tuning for precise SiC FET switching control.
It integrates a feedback-controlled DC-DC controller with external power switch support, programmable frequency, soft-start, and shutdown capability - all configured via SH/FC, SS, and RSTb pins. The device includes dedicated DSAT sensing with 7 V threshold and 220 mV hysteresis, plus Miller clamp functionality to prevent 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 for 800 V+ SiC systems. |
| Peak Output Current | ±4.0 A source/sink, sufficient to drive high-Qg SiC FETs at >100 kHz switching frequencies. |
| UVLO Threshold | 15 V (VDDB–VMID), optimized for SiC FET gate bias stability and safe turn-off margin. |
| Desat Detection | 7 V threshold with 220 mV hysteresis and <1 µs response, providing ultra-fast short-circuit protection. |
| CMTI | 125 kV/µs minimum, ensuring robust operation in high-dV/dt inverter environments. |
| DC-DC Control | External switch configuration with programmable frequency, soft-start, and shutdown - configurable via SH/FC and SS pins. |
| Operating Temp | –40 °C to +125 °C ambient, qualified per AEC-Q100 Grade 1 for automotive powertrain applications. |
Pinout & Package
SI8285EC-ASR is housed in a 24-pin wide-body SOIC package (WB SOIC-24) with creepage/clearance compliant for reinforced insulation. Pin functions are validated per Skyworks Si828x datasheet Section 5 (Pin Descriptions) and Table 1.1 ordering guide.
| 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 in high-noise motor drives. |
| VH, VL | Separate gate drive outputs | Allows independent gate resistor selection for optimizing SiC FET rise/fall times and dV/dt control. |
| DSAT | Desaturation sense input | Monitors VDS/VCE via external RDSAT/DDSAT; triggers soft shutdown within <1 µs upon overcurrent detection. |
| CLMP | Miller clamp control output | Actively clamps gate to VMID during off-state to suppress parasitic turn-on in half-bridge configurations. |
| /FLT, /RST | Open-drain fault indicator & active-low reset | Enables system-level fault coordination: FLTb pulls low on DESAT/UVLO; RSTb clears fault after MCU intervention. |
| RDY | Push-pull power-ready indicator | Signals valid VDDA and VDDB supply rails - used by MCU to gate PWM startup and ensure safe initialization. |
| SH/FC, SS | DC-DC control inputs | SH/FC sets switching frequency; SS enables soft-start - critical for EMI reduction and inrush current management. |
| VMID, VSSB | Reference and negative bias return | VSSB tied to VMID unless negative gate bias is required; enables flexible gate drive voltage configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC controller with external switch | Supports high-input-voltage rails (e.g., 12 V automotive) and delivers up to 30 V driver-side supply with 83% efficiency. |
| Ultra-fast desaturation protection | Sub-microsecond (<1 µs) fault detection and soft shutdown, preventing destructive shoot-through in SiC half-bridges. |
| Dedicated Miller clamp | Active gate clamping during off-state eliminates need for external transistor, reducing BOM count and layout complexity. |
| AEC-Q100 Grade 1 qualification | Validated for automotive powertrain use including traction inverters and on-board chargers with full PPAP support. |
| Programmable DC-DC frequency & soft-start | EMI optimization via dithering and controlled inrush current - essential for CISPR-25 compliance in EV systems. |
Applications
| Traction Inverter | On-Board Charger (OBC) |
|---|---|
Use Scenario: Driving parallel SiC FET half-bridges in 800 V battery electric vehicle inverters with >10 kHz PWM and >150 A phase current. IC Role / Device Role / Timing Role: Isolated gate driver providing reinforced insulation, DESAT protection, and independent VH/VL control for precise SiC switching. Use Value: Enables reliable 175 °C junction operation with 125 kV/µs CMTI, eliminating optocoupler aging and timing drift in high-power traction systems. |
Use Scenario: Controlling SiC MOSFETs in bidirectional AC/DC and DC/DC stages of 11 kW OBCs operating at 200–300 kHz. IC Role / Device Role / Timing Role: Gate driver with integrated DC-DC supplying isolated 15 V gate bias and soft-start for transformer inrush control. Use Value: Reduces external component count by integrating DC-DC control, DESAT, and Miller clamp - accelerating OBC design and improving thermal reliability. |
| Industrial Motor Drive | Renewable Energy Inverter |
Use Scenario: Driving IGBTs in variable-frequency drives for HVAC compressors and industrial pumps requiring SIL-2 functional safety compliance. IC Role / Device Role / Timing Role: Safety-enhanced isolated driver with fault feedback (/FLT), ready signal (RDY), and UVLO monitoring for system-level diagnostics. Use Value: Provides certified DESAT detection and soft shutdown - enabling IEC 61800-5-2-compliant safe torque off (STO) without external supervision ICs. |
Use Scenario: Gate driving SiC FETs in string inverters for solar PV systems operating at 1000 V DC input with rapid MPPT transients. IC Role / Device Role / Timing Role: High-CMTI isolated driver with programmable DC-DC frequency to minimize EMI during fast voltage transitions. Use Value: Maintains signal integrity under >50 kV/µs transients from lightning surges or grid faults, ensuring uninterrupted inverter operation and grid-code compliance. |
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-ASR | Same 24-pin WB SOIC package, 5.0 kVrms isolation, 15 V UVLO, and external-switch DC-DC - but adds frequency control and shutdown not present in SI8285EC-ASR. | SI8285EC-ASR lacks SH/FC and SS pins; Si8284EC-ASR supports full DC-DC configurability - suitable where EMI tuning or inrush control is mandatory. | Select Si8284EC-ASR only if programmable frequency or soft-start is required; otherwise SI8285EC-ASR offers identical core gate drive and protection with simpler control interface. |
| UCC5870QDWJRQ1 | Texas Instruments' AEC-Q100 qualified 5.7 kVrms isolated driver with 10 A peak output, but uses internal DC-DC switch and lacks dedicated CLMP pin. | Higher drive strength suits larger SiC modules; however, absence of integrated Miller clamp requires external transistor, increasing layout complexity and BOM cost. | Choose UCC5870QDWJRQ1 for >10 A peak drive needs; prefer SI8285EC-ASR when integrated Miller clamp, proven DESAT accuracy, and compact 24-pin SOIC are prioritized. |
Compared with Si8284EC-ASR, SI8285EC-ASR simplifies system design by removing redundant DC-DC controls while retaining identical isolation, drive strength, and protection - and compared with UCC5870QDWJRQ1, it reduces layout risk and component count via native Miller clamping and optimized SiC-specific UVLO.
Availability
SI8285EC-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 support.
Supply support for SI8285EC-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 SI8285EC-ASR belongs to Skyworks' Si828x family of SiC-optimized isolated gate drivers - engineered for high-reliability automotive and industrial power conversion where reinforced isolation, ultra-fast fault response, and integrated safety features are mandatory.
FAQ
What is the isolation rating and safety certification of the SI8285EC-ASR?
The SI8285EC-ASR provides 5.0 kVrms isolation per UL1577 and carries reinforced insulation certifications per IEC 62368-1 (VDE/CSA) and GB4943.1-2011 (CQC). It is AEC-Q100 Grade 1 qualified and built using automotive-specific manufacturing flows - making it suitable for ISO 26262 ASIL-B–capable traction inverter subsystems where galvanic separation and long-term reliability are critical. SI8285EC-ASR meets these requirements without external components.
Does the SI8285EC-ASR support SiC FETs with 15 V gate drive, and how is UVLO configured?
Yes, the SI8285EC-ASR is explicitly designed for SiC FETs and features a 15 V UVLO threshold (VDDB–VMID), ensuring robust turn-on and safe turn-off margins for devices requiring ±15 V gate bias. This UVLO level prevents partial enhancement during brownout conditions and is factory-trimmed - no external resistors or configuration are needed. SI8285EC-ASR maintains this specification across its full –40 °C to +125 °C operating range.
How does the desaturation detection work on the SI8285EC-ASR, and what is its response time?
The SI8285EC-ASR implements hardware-based desaturation detection with a fixed 7 V threshold and 220 mV hysteresis on the DSAT pin, achieving <1 µs fault-to-shutdown latency. It uses an internal current source to charge an external blanking capacitor (CBL), enabling programmable blanking time to ignore turn-on transients. SI8285EC-ASR then initiates soft shutdown - discharging the gate via RH - to limit dV/dt and prevent secondary failures.
What DC-DC converter topology does the SI8285EC-ASR support, and is an external switch required?
The SI8285EC-ASR uses an external-switch DC-DC controller architecture, requiring an external MOSFET (e.g., Si828x ESW pin drives gate) and miniature transformer. This enables higher input voltage tolerance (e.g., 12 V automotive rail) and greater output power than internal-switch variants. SI8285EC-ASR does not integrate power switches - its SH/FC and SS pins configure frequency and soft-start, but the power stage remains external for thermal and efficiency optimization.
Is the SI8285EC-ASR pin-compatible with other Si828x family members, and which package does it use?
Yes, the SI8285EC-ASR uses the 24-pin wide-body SOIC (WB SOIC-24) package and shares identical pinout with Si8283x and Si8284x variants - including VH, VL, DSAT, CLMP, /FLT, /RST, RDY, and SH/FC. However, SI8285EC-ASR omits the SS pin (soft-start disabled), distinguishing it from Si8284EC-ASR. All WB SOIC-24 Si828x parts maintain mechanical and solder-reflow compatibility, enabling drop-in replacement where feature alignment permits. SI8285EC-ASR's pin mapping is fully documented in Skyworks' datasheet Section 5.
SI8285EC-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:
- 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, UL, VDE
SI8285EC-ASR FAQ
1.How can I place an order for SI8285EC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8285EC-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 SI8285EC-ASR reliable?
The price and inventory of SI8285EC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8285EC-ASR is usually 5 days.
3.What payment methods are accepted for SI8285EC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8285EC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8285EC-ASR?
SI8285EC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8285EC-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 SI8285EC-ASR?
For technical support, including SI8285EC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8285EC-ASR requirements.
6.How does Aetrix verify that SI8285EC-ASR is sourced from the original manufacturer or authorized distributors?
All SI8285EC-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 SI8285EC-ASR meets industry standards.
7.What is the process for return or replacement of SI8285EC-ASR?
All SI8285EC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8285EC-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 SI8285EC-ASR part is unused and in its original packaging.
Return procedure for SI8285EC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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