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Skyworks Solutions Inc. SI8286BC-ASR
- Part No.:
- SI8286BC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI8286BC-ASR.pdf
- Description:
- DGT ISO 3.75KV 1CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,147
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Product details
Overview
SI8286BC-ASR from Skyworks is an automotive-grade, isolated high-current gate driver IC 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 5.0 kVrms isolation (UL 1577), features DESAT detection with <1 µs response, and operates across –40 to 125 °C.
For engineers reviewing the SI8286BC-ASR datasheet, SI8286BC-ASR pinout, SI8286BC-ASR application, or SI8286BC-ASR equivalent, this device is selected for high-reliability EV power stages requiring reinforced insulation (IEC 62368-1), soft shutdown, Miller clamping, and AEC-Q100 qualification - with attention to UVLO thresholds (13 V), external switch configuration, and 24-pin wide-body SOIC packaging.
Technical Context
The SI8286BC-ASR implements a dual-channel RF-based isolation architecture with separate VH/VL output pins for independent gate resistor control, enabling precise tuning of SiC FET switching transitions. Its integrated DC-DC controller uses an external power switch and supports programmable frequency, soft-start, and shutdown control - distinguishing it from internal-switch variants like SI8281/83.
On the driver side, it integrates DESAT sensing with fixed 7 V threshold and 220 mV hysteresis, active-low FLTb fault reporting, push-pull RDY status indication, and Miller clamp functionality tied to CLMP pin. The input accepts complementary digital logic (IN+/IN–) with configurable active-high/active-low operation and robust CMTI of 125 kV/µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.0 kVrms (UL 1577, 1 min); enables reinforced insulation in 800 V EV systems without additional barrier components. |
| Peak Output Current | ±4.0 A; sufficient to drive high-Qg SiC FETs (e.g., 100 nC) with fast turn-on/turn-off at >100 kHz switching. |
| UVLO Threshold | 13 V (VDDB–VMID); matches common SiC FET gate bias requirements and prevents partial turn-on during brownout. |
| DESAT Response Time | <1 µs; ensures immediate shutdown before destructive IGBT/SiC FET overcurrent damage occurs. |
| Driver Supply Voltage | 30 V max on VDDB; supports high-side gate drive in half-bridge topologies with elevated floating rail voltages. |
| CMTI | 125 kV/µs; maintains signal integrity in high-dV/dt motor inverter environments (e.g., >50 kV/µs transients). |
| Operating Temperature | –40 to +125 °C; qualified per AEC-Q100 Grade 1 for under-hood automotive applications. |
Pinout & Package
SI8286BC-ASR is housed in a RoHS-compliant 24-pin wide-body SOIC package (WB SOIC-24) with creepage/clearance optimized for 5.0 kVrms isolation. Pin pitch is 1.27 mm; body width is 7.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Primary-side supply | Accepts 4.5–24 V input for logic and isolation transmitter; powers IN+/IN–, RSTb, RDY, FLTb. |
| IN+ | Complementary input | Active-high control input; used with IN– held low for standard PWM interface to MCU. |
| IN– | Complementary input | Active-low control input; used with IN+ held high for inverted logic drive. |
| RSTb | Active-low reset | Clears DESAT fault latching; must be pulsed low ≥350 ns after FLTb assertion to resume operation. |
| RDY | Power-ready indicator | Push-pull output goes high only when both VDDA and VDDB exit UVLO; requires 10 kΩ pulldown if unused. |
| FLTb | Fault indicator | Open-drain output pulled low during DESAT or UVLO fault; shared across multiple drivers via OR-wiring. |
| VH | High-side gate drive | Source-only output; connects to gate via external RH resistor for controlled turn-on slew rate. |
| VL | Low-side gate drive | Sink-only output; connects to gate via external RL resistor for controlled turn-off slew rate. |
| CLMP | Miller clamp control | Activates internal NMOS to clamp gate to VMID during high dV/dt, preventing parasitic turn-on in half-bridge. |
| DSAT | Desaturation sense | Monitors VCE/VDS via external RDSAT/DDSAT; triggers soft shutdown if voltage exceeds 7 V post-blanking. |
| VMID | Reference midpoint | Common node for DSAT sensing, VSSB shorting (if no negative bias), and blanking capacitor (CBL) return. |
| VSSB | Secondary-side ground | Driver-side return; shorted to VMID unless negative gate bias (e.g., –5 V) is implemented via auxiliary winding. |
| VDDB | Secondary-side supply | Output of integrated DC-DC converter; powers VH/VL/CLMP/DSAT circuitry; regulated to 13 V nominal. |
| SH/FC | Shutdown/frequency control | Analog pin configuring DC-DC shutdown enable and switching frequency (via external resistor to VDDA). |
| SS | Soft-start control | Adjusts DC-DC startup ramp time via external capacitor to VSSB; prevents inrush current into transformer. |
| COMP | DC-DC error amplifier | Feedback compensation node for external RC network; stabilizes isolated DC-DC regulation loop. |
| ESW | External switch driver | Drives gate of external MOSFET (e.g., Si8284-style); enables high-input-voltage DC-DC operation up to 24 V. |
| GNDA | Primary-side ground | Logic-side reference; must be separated from GNDB by isolation barrier; ties to PCB primary ground plane. |
| GNDP | Transformer primary ground | Isolated ground for transformer primary winding; connects to ESW and VDDA return path. |
| NC | No connect | Two pins (positions 1 and 24) are internally unconnected; must remain unpopulated or floated. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC with external switch | Enables 12–24 V input compatibility and higher power delivery than internal-switch variants; supports Si8284-class topology. |
| Programmable DC-DC frequency | Reduces EMI through dithering and allows optimization against transformer core losses and layout resonances. |
| Soft shutdown on DESAT | Discharges gate via weak pull-down (VH + RH) instead of hard short, limiting dV/dt and preventing secondary breakdown. |
| Dedicated Miller clamp (CLMP) | Actively pulls gate to VMID during high dV/dt events, eliminating need for external clamp transistor in most SiC half-bridges. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use with zero-defect manufacturing flow, PPAP documentation, and IMDS/CAMDS compliance. |
Applications
| Traction Inverter | On-Board Charger (OBC) |
|---|---|
Use Scenario: High-power 3-phase inverter converting battery DC to AC for electric vehicle motor drive, operating at 800 V bus and >10 kHz switching. IC Role / Device Role / Timing Role: Isolated gate driver controlling SiC FET half-bridges with cycle-by-cycle DESAT protection and soft shutdown. Use Value: Prevents catastrophic failure during phase-to-phase short circuits; maintains system uptime via fast fault recovery and RDY monitoring. |
Use Scenario: Bidirectional AC/DC and DC/DC conversion in EV OBC, requiring galvanic isolation between grid and battery domains. IC Role / Device Role / Timing Role: Primary-side gate driver for totem-pole PFC and secondary-side driver for isolated LLC resonant converter. Use Value: Enables single-chip isolated power stage control with integrated DC-DC bias supply, reducing BOM count by 3+ discrete regulators. |
| DC-DC Converter | Industrial Motor Drive |
Use Scenario: 1–3 kW isolated DC-DC module stepping down 800 V battery to 48 V or 12 V for auxiliary systems in BEVs. IC Role / Device Role / Timing Role: Gate driver for high-side/low-side SiC switches in dual-active-bridge (DAB) topology with synchronized ZVS control. Use Value: Supports >100 kHz operation with 125 kV/µs CMTI, ensuring reliable timing alignment across isolation barrier despite high common-mode noise. |
Use Scenario: Variable-frequency drive for HVAC compressors or industrial pumps using 650–1200 V SiC modules in harsh factory environments. IC Role / Device Role / Timing Role: Fault-tolerant gate driver with UVLO, DESAT, and Miller clamp for IGBT/SiC hybrid inverters. Use Value: Extends mean time between failures (MTBF) via automotive-grade process controls and validated thermal derating up to 125 °C ambient. |
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 and AEC-Q100 Grade 1 rating, but with 15 V UVLO and external DC-DC switch; identical pinout and feature set. | Optimized for 15 V SiC FET gate bias; requires different RDSAT/DDSAT tuning due to higher DESAT threshold margin. | Select SI8284EC-ASR when driving 15 V-gate SiC FETs; SI8286BC-ASR is preferred for 13 V bias with tighter UVLO hysteresis. |
| UCC5870QDWJRQ1 | Texas Instruments' 5.7 kVRMS isolated driver with integrated DC-DC; differs in pinout, uses SPI configuration, and lacks programmable frequency. | Requires external configuration EEPROM and SPI host; not drop-in compatible; suited for systems needing diagnostics and telemetry. | Choose UCC5870QDWJRQ1 only when advanced fault logging or multi-device synchronization is required; SI8286BC-ASR offers simpler analog control. |
Compared with SI8284EC-ASR, SI8286BC-ASR provides lower UVLO (13 V vs. 15 V) for improved SiC FET gate control margin, while differing from UCC5870QDWJRQ1 in its analog-configurable DC-DC and pin-compatible upgrade path within Skyworks' Si828x family.
Availability
SI8286BC-ASR is available at Aetrix Electronics and suitable for traction inverters, on-board chargers, and isolated DC-DC converters requiring stable component supply, AEC-Q100 compliance, and 5.0 kVrms reinforced insulation.
Supply support for SI8286BC-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, isolation, and power management technologies.
The SI828x product line was engineered for high-reliability EV and industrial power conversion, integrating isolation, gate drive, and DC-DC functions to replace multi-chip solutions in SiC/IGBT-based inverters.
FAQ
What is the isolation voltage rating of the SI8286BC-ASR and which safety standards does it meet?
The SI8286BC-ASR is rated for 5.0 kVrms withstand voltage per UL 1577 (1 minute). It carries reinforced insulation certifications including CSA IEC 62368-1, VDE EN 62368-1, and CQC GB4943.1-2011. These approvals validate its use in automotive high-voltage domains such as 800 V traction inverters where galvanic separation between control and power stages is critical. SI8286BC-ASR meets all required creepage and clearance distances for these ratings in its 24-pin wide-body SOIC package.
Does the SI8286BC-ASR support both SiC FETs and IGBTs, and how does its DESAT function differ between them?
Yes, the SI8286BC-ASR is explicitly designed for both SiC FETs and IGBTs, with DESAT detection calibrated for either device type. Its fixed 7 V threshold and 220 mV hysteresis accommodate typical VCE(sat) of IGBTs (~2–3 V) and VDS(on) of SiC FETs (~3–5 V), while the blanking time (set by external CBL) is adjusted per device - e.g., 220–270 pF for SiC FETs versus 390 pF for IGBTs. SI8286BC-ASR's soft shutdown behavior remains consistent across both, discharging the gate via VH/RH to limit dV/dt.
How is the DC-DC converter in the SI8286BC-ASR configured, and what external components are required?
The SI8286BC-ASR uses an external power switch (driven by ESW pin) and requires an external miniature transformer, two Schottky rectifiers (D1/D2), output capacitors (C26/C27), and feedback compensation network (COMP pin). Input voltage range is 12–24 V; output is regulated to 13 V on VDDB. SH/FC and SS pins configure shutdown enable, switching frequency (via resistor), and soft-start ramp (via capacitor). SI8286BC-ASR does not include internal power switches - unlike SI8281/83 - making it suitable for higher-power bias rails.
What is the purpose of the CLMP pin on the SI8286BC-ASR, and how is it implemented in a half-bridge layout?
The CLMP pin on SI8286BC-ASR activates an internal NMOS transistor that clamps the driven switch's gate to VMID during high dV/dt events - preventing Miller-induced parasitic turn-on in half-bridge configurations. In layout, CLMP is connected directly to the gate node (via low-inductance trace), while VMID is tied to VSSB unless a negative bias is used. No external transistor is needed, simplifying design versus discrete clamp solutions. This feature is especially critical for SiC FETs with low Qgd and high dv/dt (>50 V/ns) in fast-switching inverters.
Is the SI8286BC-ASR pin-compatible with other Si828x family members, and which variants share the same 24-pin WB SOIC package?
SI8286BC-ASR shares the 24-pin wide-body SOIC package and identical pinout with SI8283xx-ASR and SI8284xx-ASR variants (e.g., SI8284EC-ASR). All support external DC-DC switch (ESW), programmable frequency (SH/FC), and soft-start (SS). However, SI8286BC-ASR is not pin-compatible with 20-pin variants (e.g., SI8281/82) or internal-switch types lacking ESW/SH/FC/SS pins. Migration within the 24-pin family requires only UVLO and DC-DC configuration changes - no PCB redesign.
SI8286BC-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:
- 10V ~ 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
SI8286BC-ASR FAQ
1.How can I place an order for SI8286BC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8286BC-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 SI8286BC-ASR reliable?
The price and inventory of SI8286BC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8286BC-ASR is usually 5 days.
3.What payment methods are accepted for SI8286BC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8286BC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8286BC-ASR?
SI8286BC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8286BC-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 SI8286BC-ASR?
For technical support, including SI8286BC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8286BC-ASR requirements.
6.How does Aetrix verify that SI8286BC-ASR is sourced from the original manufacturer or authorized distributors?
All SI8286BC-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 SI8286BC-ASR meets industry standards.
7.What is the process for return or replacement of SI8286BC-ASR?
All SI8286BC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8286BC-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 SI8286BC-ASR part is unused and in its original packaging.
Return procedure for SI8286BC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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