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Skyworks Solutions Inc. SI8285DC-ISR
- Part No.:
- SI8285DC-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8285DC-ISR.pdf
- Description:
- DGT ISO 3.75KV 1CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,075
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Product details
Overview
SI8285DC-ISR from Skyworks Solutions is an isolated high-current gate driver IC with integrated DC-DC converter, designed for SiC FETs and IGBTs in high-reliability inverter and motor control systems. It delivers 4 A peak source/sink drive current, features 5.0 kVrms isolation (UL 1577), 13 V UVLO threshold, and desaturation (DESAT) fault protection with <1 µs response time.
For engineers reviewing the SI8285DC-ISR datasheet, SI8285DC-ISR pinout, SI8285DC-ISR application, or SI8285DC-ISR equivalent, this device supports critical safety-critical timing roles in traction inverters, on-board chargers, and industrial renewable energy inverters where robust isolation, fast fault shutdown, and integrated bias supply are mandatory.
Technical Context
The SI8285DC-ISR implements RF-based capacitive isolation with 125 kV/µs CMTI, enabling noise-immune signal transfer across the barrier. Its dual-output architecture provides independent VH (high-side gate drive) and VL (low-side gate drive) pins, supporting asymmetric 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 DESAT circuit uses a fixed 7 V threshold with 220 mV hysteresis and blanking timer controlled by external CBL to suppress turn-on transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.0 kVrms withstand voltage per UL 1577 - enables reinforced insulation in 1000 V+ DC bus systems. |
| Peak Output Current | ±4 A - sufficient to drive large SiC FETs (e.g., 1200 V/100 A) with low gate charge without external boost. |
| UVLO Threshold | 13 V (VDDB–VMID) - matches SiC FET gate drive requirements and prevents partial turn-on during brownout. |
| DESAT Response Time | <1 µs - ensures sub-microsecond fault detection and soft shutdown initiation before destructive energy accumulates. |
| CMTI | 125 kV/µs - maintains signal integrity in high-dV/dt environments like traction inverters with >50 kV/µs edge rates. |
| DC-DC Input Support | External power switch configuration - allows high-voltage primary-side input (e.g., 12–24 V automotive rail) to generate isolated 15 V gate supply. |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions. |
Pinout & Package
SI8285DC-ISR 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' Si828x family standard for mechanical and thermal compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN− | Complementary digital input pair | Accept CMOS-level PWM signals; supports active-high (IN+) or active-low (IN−) control without external logic inversion. |
| VH, VL | Separate gate drive outputs | Enable 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 fault shutdown if voltage exceeds 7 V for > blanking time. |
| /FLT, /RST | Open-drain fault output & active-low reset | /FLT asserts low on DESAT/UVLO fault; /RST must be pulsed low to clear fault and resume operation. |
| RDY | Power-ready status indicator | Push-pull output goes high only when both VDDA and VDDB are above UVLO thresholds - confirms full system readiness. |
| SH/FC, SS | DC-DC control inputs | Enable shutdown, frequency adjustment, and soft-start sequencing of integrated isolated DC-DC converter. |
| CLMP | Miller clamp driver | Actively clamps gate to VMID during high dV/dt events to prevent parasitic turn-on in half-bridge configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DESAT protection | Fixed 7 V threshold with 220 mV hysteresis and user-configurable blanking time - eliminates need for external comparator and timer circuits. |
| Soft shutdown on fault | Controlled gate discharge via weak pull-down path (VH + RH) limits dV/dt during fault recovery - prevents secondary overvoltage stress on SiC FET. |
| Miller clamp | Dedicated CLMP pin drives external NMOS to short gate-to-source during high dV/dt - suppresses parasitic turn-on without increasing gate loop inductance. |
| Programmable DC-DC | SH/FC and SS pins allow real-time adjustment of switching frequency and startup behavior - reduces EMI and improves system-level power-up sequencing. |
| AEC-Q100 qualified | Automotive-grade process flow with PPAP documentation - meets functional safety requirements for ASIL-B/C traction inverter subsystems. |
Applications
| Traction Inverter | On-Board Charger (OBC) |
|---|---|
Use Scenario: High-power 3-phase inverter driving SiC-based motor modules in electric vehicles, operating at 800 V DC bus and >20 kHz switching frequency. IC Role / Device Role / Timing Role: Isolated gate driver providing timing-synchronized, fault-protected drive to upper/lower leg SiC FETs with <1 µs DESAT response and 125 kV/µs CMTI immunity. Use Value: Enables reliable 175 °C junction operation and eliminates external isolated DC-DC converters - reducing BOM count and board area by 30% vs. discrete solutions. | Use Scenario: Bidirectional AC/DC and DC/DC conversion stage in EV OBC, requiring galvanic isolation between primary and secondary control domains. IC Role / Device Role / Timing Role: Gate driver with integrated isolated bias supply delivering synchronized, UVLO-protected drive to SiC MOSFETs in totem-pole PFC and CLLC resonant stages. Use Value: Integrated DC-DC supports 12 V input from vehicle battery to generate stable 15 V gate supply - eliminating need for separate isolated flyback controller and transformer. |
| Industrial Solar Inverter | High-Voltage DC-DC Converter |
Use Scenario: Central string inverter for utility-scale photovoltaic farms, handling 1500 V DC input and delivering grid-synchronized 3-phase AC output. IC Role / Device Role / Timing Role: Isolated driver managing SiC FET switching in three-level NPC topology with precise dead-time control and DESAT monitoring per phase leg. Use Value: 5.0 kVrms isolation rating meets IEC 62109-1 requirements for PV system safety - avoids costly creepage/clearance redesigns in high-altitude installations. | Use Scenario: 10 kW isolated DC-DC module converting 800 V battery voltage to 48 V auxiliary supply in commercial EV platforms. IC Role / Device Role / Timing Role: Dual-channel gate driver controlling synchronous rectification and primary-side SiC FETs with coordinated soft-start and fault propagation across channels. Use Value: RDY pin synchronization ensures both primary and secondary sides power up in lockstep - preventing shoot-through during cold start and improving system MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8284DC-IS | Same 24-pin WB SOIC package, identical 13 V UVLO and 5.0 kVrms isolation, but lacks automotive qualification and PPAP support. | Targeted for industrial inverters only - not suitable for production EV programs requiring AEC-Q100 documentation. | Select Si8284DC-IS only for cost-sensitive non-automotive designs where PPAP and IMDS compliance are unnecessary. |
| UCC5870QDWJRQ1 | TI's AEC-Q100 qualified 5.7 kVrms isolated driver with integrated DC-DC; differs in pinout, uses single-ended input, and has fixed 10 V UVLO. | Requires PCB redesign due to different pin assignment and lacks complementary input flexibility - increases validation effort for existing Si828x layouts. | Choose UCC5870QDWJRQ1 only when migrating to TI ecosystem or needing higher isolation margin; expect layout and firmware adaptation. |
Compared with Si8284DC-IS, SI8285DC-ISR adds automotive-grade manufacturing traceability and PPAP support without changing electrical performance; versus UCC5870QDWJRQ1, it retains pin-compatible layout and complementary input architecture while offering tighter UVLO matching for SiC FETs.
Availability
SI8285DC-ISR is available at Aetrix Electronics and suitable for traction inverters, on-board chargers, and industrial solar inverters requiring stable component supply across multi-year automotive and energy storage production cycles.
Supply support for SI8285DC-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, isolation, and power management technologies.
The Si828x product line was engineered specifically for high-reliability SiC and IGBT gate driving in automotive traction and industrial energy conversion, integrating safety-critical functions like DESAT, soft shutdown, and isolated bias generation into a single package.
FAQ
What is the isolation voltage rating of the SI8285DC-ISR and which safety standards does it meet?
The SI8285DC-ISR provides 5.0 kVrms isolation per UL 1577 for 1 minute. It holds CSA, VDE, and CQC certifications for reinforced insulation per IEC/EN/GB 62368-1, making it compliant for use in high-voltage automotive and industrial systems requiring double or reinforced insulation barriers.
Does the SI8285DC-ISR support both SiC FETs and IGBTs, and how does its UVLO setting accommodate SiC gate requirements?
Yes, the SI8285DC-ISR is explicitly designed for both SiC FETs and IGBTs. Its 13 V UVLO threshold (VDDB–VMID) aligns with recommended SiC gate drive voltages, ensuring full enhancement while avoiding overvoltage stress - unlike generic 15 V UVLO drivers that risk accelerated gate oxide degradation in SiC devices.
How does the DESAT protection in SI8285DC-ISR differ from basic overcurrent sensing, and what is its typical response latency?
The SI8285DC-ISR implements true desaturation detection by monitoring VDS/VCE directly via the DSAT pin, not just source current. With a fixed 7 V threshold and <1 µs response time, it detects loss-of-saturation before destructive energy builds - significantly faster than current-sense-based methods that rely on secondary-side shunt amplifiers and ADC delays.
Can the integrated DC-DC converter in SI8285DC-ISR operate from a 12 V automotive supply, and what external components are required?
Yes, the SI8285DC-ISR's external-switch DC-DC configuration supports 12 V input. It requires only a miniature transformer, two Schottky diodes, feedback resistors, and a compensation capacitor - no controller IC or optocoupler needed. The SH/FC pin enables frequency tuning to optimize EMI in noisy vehicle environments.
What is the function of the CLMP pin on SI8285DC-ISR, and how is it implemented in a half-bridge layout?
The CLMP pin on SI8285DC-ISR drives an external NMOS transistor to clamp the driven SiC FET's gate to VMID during high dV/dt events. In half-bridge layouts, this prevents Miller-induced parasitic turn-on by actively discharging the gate when the complementary switch's drain voltage rises rapidly - a critical safeguard against shoot-through failure.
SI8285DC-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:
- 14V ~ 30V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
- Approval Agency:
- CQC, CSA, UL, VDE
SI8285DC-ISR FAQ
1.How can I place an order for SI8285DC-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8285DC-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 SI8285DC-ISR reliable?
The price and inventory of SI8285DC-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8285DC-ISR is usually 5 days.
3.What payment methods are accepted for SI8285DC-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8285DC-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8285DC-ISR?
SI8285DC-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8285DC-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 SI8285DC-ISR?
For technical support, including SI8285DC-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8285DC-ISR requirements.
6.How does Aetrix verify that SI8285DC-ISR is sourced from the original manufacturer or authorized distributors?
All SI8285DC-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 SI8285DC-ISR meets industry standards.
7.What is the process for return or replacement of SI8285DC-ISR?
All SI8285DC-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8285DC-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 SI8285DC-ISR part is unused and in its original packaging.
Return procedure for SI8285DC-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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