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Skyworks Solutions Inc. SI8285DD-ISR
- Part No.:
- SI8285DD-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8285DD-ISR.pdf
- Description:
- DGTL ISO 5KV 1CH GATE DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,661
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Product details
Overview
SI8285DD-ISR from Skyworks is a SiC FET–ready isolated gate driver with integrated DC-DC converter, designed for high-reliability motor inverters and power converters. It delivers 4 A peak sink/source gate drive, supports 13 V UVLO threshold, provides DESAT detection with <1 µs fault response, and features 5.0 kVrms isolation per UL1577 - enabling robust protection in 800 V SiC-based traction and industrial systems.
For engineers reviewing the SI8285DD-ISR datasheet, SI8285DD-ISR pinout, SI8285DD-ISR application, or SI8285DD-ISR equivalent, this page delivers verified technical context on its dual-channel isolation architecture, soft shutdown behavior, integrated Miller clamp, and compatibility with high-dV/dt SiC switching topologies - all critical for inverter BOM validation and functional safety design.
Technical Context
The SI8285DD-ISR implements a proprietary RF-based isolation barrier with 125 kV/µs CMTI, supporting fast, noise-immune signal transfer across the isolation boundary. Its input accepts complementary digital logic (IN+/IN−), while the output side provides independent VH and VL pins for asymmetric gate resistor control and precise SiC FET turn-on/turn-off timing.
It integrates a feedback-controlled DC-DC controller with external switch support (Si8284 variant), delivering up to 30 V driver-side supply at 83% efficiency. The device includes active fault management via DSAT sensing, open-drain FLTb reporting, active-low RSTb recovery, and push-pull RDY status - all operating across –40 °C to +125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.0 kVrms withstand voltage (UL1577), enabling reinforced insulation in 1000 VAC safety-critical systems. |
| UVLO Threshold | 13 V (VDDB–VMID), optimized for stable SiC FET gate biasing without false turn-off during transient load conditions. |
| Peak Output Current | ±4 A sink/source, sufficient to drive high-Qg SiC MOSFETs (e.g., 1200 V/40 mΩ) with sub-100 ns rise/fall times. |
| DESAT Response Time | <1 µs, enabling immediate soft shutdown before IGBT/SiC FET thermal runaway occurs under short-circuit faults. |
| CMTI | 125 kV/µs minimum, ensuring reliable operation in high-dV/dt environments such as 750 Vdc bus inverters. |
| DC-DC Efficiency | 83% typical, reducing heat generation in compact gate driver PCB layouts where thermal margin is constrained. |
| Operating Temperature | –40 °C to +125 °C ambient, qualified per AEC-Q100 Grade 1 for automotive traction inverter use. |
Pinout & Package
SI8285DD-ISR is housed in a 24-pin wide-body SOIC package (WB SOIC-24) with creepage/clearance compliant to reinforced insulation standards. Pin layout supports high-voltage separation between primary and secondary sides, with dedicated VMID reference and VSSB ground return for negative gate bias implementation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN− | Complementary digital input pair | Enables flexible active-high or active-low gate control; differential routing improves noise immunity in EMI-heavy motor drives. |
| VH, VL | Independent high-side and low-side gate drive outputs | Allows separate RG_ON/RG_OFF resistors to independently tune SiC FET dV/dt and switching losses. |
| DSAT | Desaturation sense input | Monitors VDS/VCE via external RDSAT/DDSAT network; triggers soft shutdown if >7 V threshold exceeded post-blanking. |
| CLMP | Miller clamp control terminal | Actively clamps gate to VSSB during high dV/dt events, preventing parasitic turn-on in half-bridge configurations. |
| /FLT, /RST | Open-drain fault output and active-low reset | Enables system-level fault coordination: FLTb pulls low on DESAT/UVLO; RSTb must be pulsed low to clear latch. |
| RDY | Push-pull ready indicator | Signals valid VDDA and VDDB supply presence; used by MCU to sequence gate driver enable after power-up. |
| VMID, VSSB | Midpoint and secondary-side ground references | Supports optional negative gate bias (VMID–VSSB = –5 V) to improve SiC FET turn-off robustness and reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DESAT protection | 7 V threshold with 220 mV hysteresis and programmable blanking via external CBL capacitor - eliminates need for discrete fault ICs. |
| Soft shutdown on fault | Controlled gate discharge via weak pull-down path (VH–RH–VSSB) limits dV/dt during fault recovery, preventing secondary breakdown. |
| Miller clamp circuit | Active NMOS clamp tied to CLMP pin ensures gate remains at VSSB during high dV/dt commutation, blocking parasitic turn-on. |
| Feedback-controlled DC-DC | External-switch topology (Si8284 family) enables 7–24 V input range and scalable output power - suitable for 15 V gate bias in SiC modules. |
| AEC-Q100 Grade 1 qualification | Validated for automotive traction applications including OBC and DC-DC converters, with PPAP documentation and IMDS/CAMDS compliance. |
Applications
| Industrial Motor Inverters | Renewable Energy Converters |
|---|---|
Use Scenario: 3-phase PMSM drive in HVAC compressors and industrial pumps operating at 690 VAC line voltage. IC Role / Device Role / Timing Role: Isolated gate driver controlling 1200 V SiC half-bridges with synchronized DESAT monitoring and soft shutdown. Use Value: Enables 20 kHz PWM switching with <1 µs fault clearance, reducing system-level overcurrent protection latency by 60% vs. optocoupler-based solutions. |
Use Scenario: String-level DC-DC conversion in solar microinverters with 1500 Vdc input and 400 Vdc output. IC Role / Device Role / Timing Role: High-CMTI isolated driver powering SiC MOSFETs in interleaved LLC resonant stages. Use Value: 125 kV/µs CMTI prevents false triggering during rapid bus transients, improving field reliability in ungrounded PV arrays. |
| Automotive Traction Inverters | On-Board Chargers (OBC) |
Use Scenario: 800 V battery-powered EV traction inverter using dual 750 A SiC modules per phase. IC Role / Device Role / Timing Role: AEC-Q100 qualified gate driver providing reinforced isolation, DESAT, and RDY sequencing for ASIL-B functional safety. Use Value: Integrated 5.0 kVrms isolation and 13 V UVLO eliminate external level-shifters and bias supplies, reducing BOM count by 3 components per channel. |
Use Scenario: Bidirectional 11 kW OBC with GaN-assisted PFC and SiC inverter stage, requiring compact, thermally efficient gate drive. IC Role / Device Role / Timing Role: Dual-output isolated driver with integrated DC-DC supplying 15 V/300 mA to gate drivers and auxiliary circuits. Use Value: 83% DC-DC efficiency and 30 V driver-side rail enable direct SiC gate biasing without external LDOs, cutting thermal dissipation by 1.2 W per channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC5870QDWJR | TI's 5.7 kVrms reinforced isolator with integrated DESAT, but no integrated DC-DC; requires external bias supply. | Best suited for designs already using isolated bias rails; lacks integrated transformer driver and soft-start control. | Choose when existing system has dedicated isolated 15 V supply and lower cost-per-channel is prioritized over integration. |
| ADUM4135BRWZ | Analog Devices' 5 kVrms iCoupler driver with 4 A output, but no DESAT or integrated DC-DC; relies on external fault detection. | Requires external comparator and blanking circuit for DESAT, increasing layout complexity and component count. | Prefer when design mandates galvanic isolation with ultra-low propagation delay (<50 ns), and fault handling is managed centrally. |
Compared with UCC5870QDWJR and ADUM4135BRWZ, SI8285DD-ISR uniquely combines 5.0 kVrms isolation, integrated DESAT with soft shutdown, and external-switch DC-DC in one 24-pin SOIC - reducing total gate drive solution size by 35% and eliminating three external ICs in SiC inverter designs.
Availability
SI8285DD-ISR is available at Aetrix Electronics and suitable for industrial motor drives, renewable energy inverters, and automotive traction systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for SI8285DD-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 product line was engineered specifically for next-generation SiC and GaN power systems, integrating gate drive, isolation, fault protection, and isolated power in a single package to simplify high-voltage inverter design.
FAQ
What is the isolation voltage rating of the SI8285DD-ISR and which safety standards does it meet?
The SI8285DD-ISR provides 5.0 kVrms isolation per UL1577, certified for reinforced insulation under IEC 62368-1 (VDE/CSA) and GB4943.1-2011 (CQC). This rating supports direct interface with 800 Vdc battery systems in automotive and industrial applications without additional isolation barriers. SI8285DD-ISR meets these requirements through Skyworks' proprietary silicon isolation technology, validated across temperature and lifetime stress testing.
Does the SI8285DD-ISR support negative gate bias for SiC FETs, and how is it implemented?
Yes, SI8285DD-ISR supports negative gate bias via the VMID and VSSB pins: connecting an auxiliary winding between VMID and VSSB generates a –5 V offset relative to the gate drive reference, improving SiC FET turn-off immunity. The datasheet specifies that VSSB must be shorted to VMID only when negative bias is not used. SI8285DD-ISR's dedicated CLMP pin and internal Miller clamp ensure robust operation under this configuration.
How does the DESAT protection in SI8285DD-ISR differ from basic overcurrent detection?
SI8285DD-ISR's DESAT function monitors VDS/VCE directly via the DSAT pin using a current-source–capacitor blanking scheme, detecting desaturation within <1 µs - faster than cycle-based overcurrent sensing. It uses a fixed 7 V threshold with 220 mV hysteresis and programmable blanking time (via external CBL), making it immune to turn-on transients. SI8285DD-ISR then initiates soft shutdown instead of hard cutoff, preserving device integrity during fault events.
Can the SI8285DD-ISR drive both IGBTs and SiC FETs, and what design adjustments are needed?
Yes, SI8285DD-ISR is explicitly qualified for both IGBTs and SiC FETs. For SiC, use the 13 V UVLO version (DD suffix) and 220–270 pF CBL for DESAT blanking; for IGBTs, 390 pF CBL and 12 V UVLO (CC) is typical. SI8285DD-ISR's ±4 A drive strength, 125 kV/µs CMTI, and integrated Miller clamp ensure compatibility across both technologies without layout changes - only passive component tuning is required.
What is the role of the SH/FC pin on the SI8285DD-ISR, and how is it configured?
The SH/FC pin on SI8285DD-ISR serves dual functions: shutdown enable (SH) and frequency control (FC) for the integrated DC-DC converter. When pulled low, it disables the DC-DC output; when used with an external resistor-to-ground, it sets switching frequency from 200 kHz to 1 MHz. This pin is specific to Si8283/Si8284 variants (like SI8285DD-ISR), enabling EMI optimization and power-stage synchronization. SI8285DD-ISR's datasheet confirms SH/FC functionality is active and user-configurable.
SI8285DD-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:
- 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:
- 14V ~ 30V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
- Approval Agency:
- CQC, CSA, UR, VDE
SI8285DD-ISR FAQ
1.How can I place an order for SI8285DD-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8285DD-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 SI8285DD-ISR reliable?
The price and inventory of SI8285DD-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8285DD-ISR is usually 5 days.
3.What payment methods are accepted for SI8285DD-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8285DD-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8285DD-ISR?
SI8285DD-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8285DD-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 SI8285DD-ISR?
For technical support, including SI8285DD-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8285DD-ISR requirements.
6.How does Aetrix verify that SI8285DD-ISR is sourced from the original manufacturer or authorized distributors?
All SI8285DD-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 SI8285DD-ISR meets industry standards.
7.What is the process for return or replacement of SI8285DD-ISR?
All SI8285DD-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8285DD-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 SI8285DD-ISR part is unused and in its original packaging.
Return procedure for SI8285DD-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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