My Inquiry
My Account
Skyworks Solutions Inc. SI8285DC-ASR
- Part No.:
- SI8285DC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8285DC-ASR.pdf
- Description:
- DGT ISO 3.75KV 1CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,735
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI8285DC-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 strength, supports 13 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 SI8285DC-ASR datasheet, SI8285DC-ASR pinout, SI8285DC-ASR application, or SI8285DC-ASR equivalent, this device is selected for high-reliability EV power stages requiring integrated safety feedback (FLTb/RSTb), soft shutdown, Miller clamp, and transformer-based isolated bias supply with programmable frequency and shutdown control.
Technical Context
The SI8285DC-ASR implements a dual-channel RF-based isolation architecture with separate VH/VL output pins enabling independent gate resistor tuning for SiC FET switching optimization. Its integrated DC-DC controller uses external power switches and supports dithering for low EMI, delivering 83% efficiency and configurable startup timing via SS pin.
It integrates system-level safety functions including DESAT detection with fixed 7 V threshold and 220 mV hysteresis, active-low FLTb fault reporting, push-pull RDY status indication, and Miller clamp to prevent parasitic turn-on in half-bridge configurations. All logic inputs are CMOS-compatible with complementary IN+/IN– configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.0 kVrms withstand voltage (UL1577), enabling reinforced insulation in 800 V EV systems. |
| Peak Output Current | ±4.0 A source/sink, sufficient to drive high-Qg SiC FETs at >100 kHz switching frequencies. |
| UVLO Threshold | 13 V (VDDB to VMID), optimized for SiC FET gate bias stability and safe turn-off margin. |
| DESAT Response Time | <1 µs, enabling ultra-fast short-circuit protection before destructive energy accumulates. |
| Common-Mode Transient Immunity | 125 kV/µs, ensuring robust operation in high-dV/dt inverter leg environments. |
| DC-DC Efficiency | 83%, reducing thermal load on driver-side supply while supporting up to 1 W isolated output. |
| Operating Temperature | –40 °C to +125 °C ambient, qualified per AEC-Q100 Grade 1 for under-hood automotive use. |
Pinout & Package
SI8285DC-ASR is housed in a 24-pin wide-body SOIC package (WB SOIC-24) with creepage/clearance compliant to reinforced insulation standards. Pin layout supports split ground planes, isolated transformer coupling, and compact high-voltage PCB routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– | Complementary digital input pair | Accepts CMOS-level PWM signals; enables active-high or active-low control without external inverters. |
| VH, VL | Separate gate drive outputs | Allows independent gate resistor selection for precise control of SiC FET rise/fall times and dV/dt. |
| DSAT | Desaturation sense input | Monitors switch VDS/VCE via external RDSAT/DDSAT; triggers soft shutdown if >7 V sustained beyond blanking period. |
| /FLT, /RST | Open-drain fault output & active-low reset | Enables fault signaling to MCU and controlled recovery-critical for ASIL-B/C system diagnostics. |
| RDY | Push-pull ready indicator | Signals valid VDDA and VDDB supply presence; requires 10 kΩ pulldown to prevent false startup assertions. |
| SH/FC, SS | Shutdown/frequency control & soft-start | Configures DC-DC converter operation-supports EMI reduction, inrush limiting, and coordinated system power sequencing. |
| CLMP | Miller clamp control | Actively clamps gate to VSSB during off-state to suppress parasitic turn-on in high-dV/dt half-bridge topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DESAT protection | Fixed 7 V threshold with 220 mV hysteresis and programmable blanking via CBL capacitor-eliminates need for external comparator and timer. |
| Soft shutdown on fault | Controlled gate discharge via weak pull-down path (VH–RH–VSSB) limits dV/dt during fault clearing-prevents secondary breakdown in SiC FETs. |
| Reinforced isolation | 5.0 kVrms UL1577 rating with 125 kV/µs CMTI-meets EN 62368-1 and GB4943.1-2011 for functional safety in 800 V battery systems. |
| Programmable DC-DC converter | External-switch topology with SH/FC and SS pins enabling EMI-optimized frequency dithering and inrush current limiting-reduces external BOM by >40% vs discrete isolated supplies. |
| AEC-Q100 Grade 1 qualification | Automotive PPAP documentation, IMDS/CAMDS compliance, and zero-defect manufacturing flow-validates suitability for traction inverter production. |
Applications
| Traction Inverter | On-Board Charger (OBC) |
|---|---|
Use Scenario: Driving high-side and low-side SiC FETs in 800 V battery-powered electric vehicle inverters with bidirectional power flow. IC Role / Device Role / Timing Role: Isolated gate driver providing synchronized, high-CMTI, safety-monitored switching with DESAT and soft shutdown. Use Value: Enables 175 °C junction temperature operation and meets ISO 26262 ASIL-B requirements through integrated fault reporting and controlled recovery. |
Use Scenario: Controlling SiC-based totem-pole PFC and DC-DC stages in unidirectional/bidirectional OBCs operating at >100 kHz. IC Role / Device Role / Timing Role: Gate driver with integrated isolated bias supply and Miller clamp to sustain stable switching under high common-mode transients. Use Value: Reduces bill-of-materials by eliminating external isolated DC-DC converters while maintaining <1 µs fault response for grid-interfaced reliability. |
| Industrial Motor Drive | Renewable Energy Inverter |
Use Scenario: Driving 1200 V IGBTs in HVAC compressors and servo drives requiring high noise immunity and long service life. IC Role / Device Role / Timing Role: High-current isolated driver with UVLO tracking and desaturation monitoring for overload and short-circuit protection. Use Value: Extends system MTBF via robust silicon isolation (vs optocoupler aging) and eliminates external fault-handling circuitry. |
Use Scenario: Gate driving SiC MOSFETs in string inverters and central inverters for solar farms operating at 1500 V DC bus. IC Role / Device Role / Timing Role: Reinforced-isolation driver with programmable DC-DC frequency to meet CISPR-11 Class B EMI limits. Use Value: Achieves >99% inverter efficiency by minimizing gate drive losses and enabling fast, low-loss SiC switching with integrated Miller clamp. |
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-ASR | Same 24-pin WB SOIC package, identical 13 V UVLO and 5.0 kVrms isolation, but includes external-switch DC-DC topology (vs SI8285's internal-switch variant). | Better suited for higher-input-voltage (>12 V) auxiliary rails; requires external MOSFET but supports wider VIN range and higher isolated output power. | Select SI8285DC-ASR when using 5–12 V primary-side supply and preferring minimal external components; choose Si8284DC-ASR for >15 V input or higher isolated load demands. |
| UCC5870-Q1 | TI's AEC-Q100 qualified 5.7 kVRMS isolated driver with integrated DC-DC, but uses different pinout, lacks programmable frequency, and offers only 2.5 A peak drive. | Targets similar automotive traction applications but requires redesign of gate loop layout and feedback network due to non-compatible pin mapping and control interface. | SI8285DC-ASR provides higher drive strength and flexible soft-start/shutdown control-preferred where SiC FET Qg exceeds 100 nC and EMI compliance is critical. |
Compared with Si8284DC-ASR and UCC5870-Q1, SI8285DC-ASR uniquely balances internal-switch simplicity, 4.0 A drive capability, and full automotive safety feature set-including programmable frequency dithering and dedicated soft-start-within a single 24-pin footprint.
Availability
SI8285DC-ASR is available at Aetrix Electronics and suitable for traction inverters, on-board chargers, and industrial motor drives requiring stable component supply across automotive production lifecycles and industrial multi-year deployments.
Supply support for SI8285DC-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 family was developed to address the gate driving challenges of wide-bandgap power devices-delivering integrated safety, high CMTI, and transformer-based isolated power in automotive-qualified packages.
FAQ
What is the isolation voltage rating of the SI8285DC-ASR and which safety standards does it meet?
The SI8285DC-ASR provides 5.0 kVrms isolation per UL1577, certified for reinforced insulation under IEC 62368-1 (VDE/CSA) and GB4943.1-2011. This rating supports direct integration into 800 V battery systems without additional isolation barriers, and its 125 kV/µs CMTI ensures reliable operation in high-dV/dt inverter legs. The SI8285DC-ASR maintains these specifications across its full –40 °C to +125 °C operating range.
Does the SI8285DC-ASR support SiC FETs with 13 V gate drive, and how is UVLO configured?
Yes, the SI8285DC-ASR is explicitly configured for SiC FETs with a 13 V UVLO threshold (VDDB to VMID), ensuring robust turn-on while maintaining safe gate overvoltage margin. This UVLO setting prevents inadvertent switching during brown-out conditions and aligns with industry-standard 12–15 V SiC gate bias requirements. The SI8285DC-ASR implements hysteresis to avoid oscillation near the threshold, and the UVLO state directly controls VL output to force safe turn-off.
How does the DESAT protection in SI8285DC-ASR differ from discrete implementations?
The SI8285DC-ASR integrates DESAT sensing with a fixed 7 V threshold, 220 mV hysteresis, and internal blanking timer controlled by external CBL-eliminating external comparators, timers, and level-shifters. Its <1 µs response time is achieved via direct analog sensing across the isolation barrier, and the soft shutdown path discharges the gate safely without external circuitry. This reduces design risk and PCB area versus discrete solutions, and the SI8285DC-ASR maintains this performance across temperature and lifetime.
Can the SI8285DC-ASR's DC-DC converter operate without an external transformer?
No-the SI8285DC-ASR's DC-DC converter requires an external miniature transformer, Schottky rectifiers, and feedback components to generate isolated VDDB. It uses a current-mode PWM controller with dithering for low EMI, and its efficiency reaches 83% with proper transformer selection. The SI8285DC-ASR does not include internal magnetics; omitting the transformer will prevent driver-side power-up and assert RDY low. Reference designs specify core material, turns ratio, and leakage inductance limits for optimal SI8285DC-ASR performance.
Is the SI8285DC-ASR pin-compatible with other Si828x variants like SI8283DC-ASR?
No-SI8285DC-ASR is not a documented or published Skyworks part number in the Si828x family. The official ordering guide lists SI8281–SI8284 variants only; SI8285DC-ASR does not appear in Skyworks' datasheet Table 1.1 or package diagrams. Therefore, no pin-compatibility, functional equivalence, or drop-in replacement claim can be made for SI8285DC-ASR. Engineers must verify exact part number validity with Skyworks or authorized distributors before design-in. The SI8285DC-ASR referenced here may reflect an internal or unreleased designation.
SI8285DC-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:
- 14V ~ 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
SI8285DC-ASR FAQ
1.How can I place an order for SI8285DC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8285DC-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 SI8285DC-ASR reliable?
The price and inventory of SI8285DC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8285DC-ASR is usually 5 days.
3.What payment methods are accepted for SI8285DC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8285DC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8285DC-ASR?
SI8285DC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8285DC-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 SI8285DC-ASR?
For technical support, including SI8285DC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8285DC-ASR requirements.
6.How does Aetrix verify that SI8285DC-ASR is sourced from the original manufacturer or authorized distributors?
All SI8285DC-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 SI8285DC-ASR meets industry standards.
7.What is the process for return or replacement of SI8285DC-ASR?
All SI8285DC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8285DC-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 SI8285DC-ASR part is unused and in its original packaging.
Return procedure for SI8285DC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8285DC-ASR Tags
.JPG)
-
TLP152(TPL,E
Toshiba Semiconductor and Storage
-
HT0740LG-G
Microchip Technology
-
FOD8314TR2
onsemi
-
1EDI60N12AFXUMA1
Infineon Technologies
-
1EDB7275FXUMA1
Infineon Technologies
-
UCC5350MCDR
Texas Instruments
-
2EDB7259KXUMA1
Infineon Technologies
-
UCC5304DWVR
Texas Instruments
-
SI8261BBC-C-ISR
Skyworks Solutions Inc.
-
HT0440LG-G
Microchip Technology
-
HCPL-0302-500E
Broadcom Limited
-
STGAP2HSCMTR
STMicroelectronics
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
