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Skyworks Solutions Inc. SI8261BCC-ASR
- Part No.:
- SI8261BCC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8261BCC-ASR.pdf
- Description:
- DGTL ISO 3.75KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,521
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Product details
Overview
SI8261BCC-ASR from Skyworks Solutions is a 5 kVRMS isolated gate driver with LED-emulator input and 4.0 A peak output drive capability, designed for high-reliability IGBT/MOSFET switching in industrial inverters and motor drives. It features 60 ns propagation delay (independent of input current), rail-to-rail output voltage, 6.5–30 V wide VDD range, and –40 to +125 °C operating temperature.
For engineers reviewing the SI8261BCC-ASR datasheet, SI8261BCC-ASR pinout, SI8261BCC-ASR application, or SI8261BCC-ASR equivalent, this page delivers verified specifications, SOIC-8 package details, UVLO thresholds (8 V typ), CMTI >50 kV/µs, and drop-in replacement guidance for HCPL-3120/ACPL-3130 in high-noise power stage designs.
Technical Context
The SI8261BCC-ASR implements RF-based silicon isolation instead of optical coupling, enabling stable timing performance across temperature and lifetime. Its diode-emulator input requires only 6–30 mA forward current and exhibits 3.6 mA threshold with 0.34 mA hysteresis - eliminating LED aging drift while maintaining industry-standard opto-driver pin compatibility.
Internally, dual VO pins must be shorted to achieve full 4.0 A sink capability; output resistance is 0.8–2.0 Ω (low-side) and 2.6–5.1 Ω (high-side). The device integrates programmable UVLO (Si8261Bxx variant: 7.5–9.4 V rising threshold, 500 mV hysteresis) and a 15 ns input noise filter to reject sub-pulse transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 5000 VRMS (UL1577), 10 kV surge (VDE 0884-10) - enables reinforced insulation in 600 V AC mains systems |
| Output Drive | 4.0 A sink / 1.8 A source peak - supports fast turn-off of high-capacitance IGBTs in 10–20 kHz inverter stages |
| Propagation Delay | 20–60 ns (tPLH), 10–50 ns (tPHL) - tight unit-to-unit matching (<25 ns PDD) simplifies multi-channel timing alignment |
| CMTI | 35–50 kV/µs typical - sustains reliable operation during 1500 V common-mode transients in SiC/GaN half-bridges |
| VDD Range | 6.5–30 V - directly interfaces with 12 V/15 V/24 V gate driver supply rails without LDO buffering |
| UVLO Threshold | 7.5–9.4 V (rising), 6.9–8.9 V (falling), 500 mV hysteresis - prevents erratic switching during brown-out conditions |
| Operating Temp | –40 to +125 °C ambient - qualified per AEC-Q100 Grade 1, suitable for under-hood automotive traction inverters |
Pinout & Package
SI8261BCC-ASR is housed in an 8-pin narrow-body SOIC package (SOIC-8, 3.9 mm width) with gull-wing leads, RoHS-compliant, and rated for 140 °C max junction temperature. Creepage/clearance meet IEC 60664-1 up to 450 VRMS mains voltage.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | LED-emulator input anode; accepts 6–30 mA forward current; reverse voltage limited to 0.3 V |
| 2 | Cathode | LED-emulator input cathode; referenced to primary-side ground; forms input diode pair with Pin 1 |
| 3 | NC | No connect - internally unconnected; must remain floating or grounded per layout best practice |
| 4 | VDD | Secondary-side supply input (6.5–30 V); requires local 1 µF ceramic + 10 µF bulk decoupling |
| 5 | GND | Secondary-side reference ground; isolated from primary side; return path for output drivers |
| 6 | UVLO | UVLO configuration pin - tied to GND for 8 V UVLO mode (Bxx variant); open or pulled high for other thresholds |
| 7 | VO | Output driver high-side terminal; must be shorted to Pin 8 to achieve full 4.0 A sink rating |
| 8 | VO | Output driver low-side terminal; paralleled with Pin 7 for 4.0 A compliance; rail-to-rail swing (VDD–0.25 V to 80 mV) |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible opto-replacement | Direct drop-in for HCPL-3120, ACPL-3130, HCNW3120 - no PCB redesign required for legacy motor drive boards |
| Diode-emulator input | 3.6 mA IF(TH) with 0.34 mA hysteresis - eliminates LED aging, reduces MCU GPIO current burden vs. optocouplers |
| High CMTI immunity | 50 kV/µs typical - suppresses false triggering in high-dV/dt SiC inverter legs with >100 V/ns edge rates |
| Robust UVLO protection | Configurable 8 V UVLO (Bxx) with 500 mV hysteresis - ensures clean startup/shutdown in noisy 24 V industrial supplies |
| Low-output impedance | 0.8 Ω ROL (sink), 2.6 Ω ROH (source) - minimizes gate loop losses and improves Miller immunity in high-speed switching |
Applications
| Industrial Inverters | Automotive Traction Drives |
|---|---|
Use Scenario: 3-phase 600 V AC inverter for HVAC compressors and industrial pumps operating at 8–16 kHz switching frequency. IC Role / Device Role / Timing Role: Isolated gate driver delivering 4.0 A sink current to turn off 600 V IGBTs with <60 ns propagation delay and <28 ns pulse width distortion. Use Value: Enables precise dead-time control and reduced switching losses versus optocouplers, improving system efficiency by ≥1.2% at full load. |
Use Scenario: Onboard charger (OBC) and DC-DC converter in HEV/EV powertrain with AEC-Q100 compliance requirement. IC Role / Device Role / Timing Role: Reinforced-isolation gate driver for 650 V SiC MOSFET half-bridges, operating from –40 to +125 °C ambient. Use Value: 10 kV surge withstand and 50 kV/µs CMTI prevent misfiring during battery fault transients, supporting ASIL-B functional safety goals. |
| Renewable Energy Converters | White Goods Motor Control |
Use Scenario: Solar string inverter MPPT stage using 1200 V IGBT modules with 100 kHz PWM and high common-mode noise. IC Role / Device Role / Timing Role: High-CMTI isolated driver providing 4.0 A peak sink to minimize IGBT tail current and conduction losses. Use Value: 14× tighter part-to-part matching vs. optocouplers enables consistent gate timing across multi-channel arrays, reducing thermal imbalance. |
Use Scenario: Variable-speed BLDC motor drive in washing machines and refrigerators requiring compact, low-cost isolation. IC Role / Device Role / Timing Role: Cost-optimized gate driver replacing HCPL-3120 in 24 V-powered appliance inverters with 15–25 kHz switching. Use Value: 10× lower FIT rate extends service life beyond 15 years, meeting IEC 60730 Class B reliability requirements for consumer appliances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HCPL-3120-000E | Optocoupled, 2.5 A sink, 5000 VRMS, 0.5–1.0 VF, 0.5 µs propagation delay, no UVLO | Limited to ≤20 kHz due to slower timing; lacks integrated UVLO and CMTI >30 kV/µs | Use only where cost sensitivity outweighs timing precision and reliability requirements |
| Si823x-AB-IM | Silicon-isolated, 2.5 A sink, same SOIC-8 footprint, but fixed 5 V UVLO and no UVLO pin configuration | Not pin-compatible - requires PCB redesign; lacks configurable UVLO and 4.0 A drive capability | Select when 2.5 A drive suffices and simplified BOM is prioritized over field-configurable protection |
Compared with HCPL-3120-000E and Si823x-AB-IM, SI8261BCC-ASR uniquely combines 4.0 A drive, programmable 8 V UVLO, and 50 kV/µs CMTI in a drop-in SOIC-8 package - enabling higher-efficiency, longer-life inverter designs without layout changes.
Availability
SI8261BCC-ASR is available at Aetrix Electronics and suitable for industrial inverters, automotive traction drives, and renewable energy converters requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for SI8261BCC-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 timing technologies.
The Si826x product line was engineered to replace aging optocoupled gate drivers with robust, high-speed silicon-isolated alternatives for demanding power conversion applications - emphasizing reliability, timing accuracy, and system-level noise immunity.
FAQ
What is the UVLO configuration for SI8261BCC-ASR?
The SI8261BCC-ASR is a Bxx-series variant with 8 V nominal UVLO threshold (rising), 7.5–9.4 V min/max, and 500 mV hysteresis. Pin 6 (UVLO) must be tied to GND to activate this mode. This setting prevents unintended switching during 24 V supply brown-outs common in industrial motor drives.
Does SI8261BCC-ASR require external components for basic operation?
Yes - SI8261BCC-ASR requires a minimum 1 µF ceramic capacitor between VDD (Pin 4) and GND (Pin 5), plus a 10 µF bulk capacitor, placed as close as possible to the pins. No external pull-ups, level shifters, or bias networks are needed for standard LED-emulator input drive.
How is 4.0 A output current achieved on SI8261BCC-ASR?
SI8261BCC-ASR achieves 4.0 A sink current only when both VO pins (Pins 7 and 8) are shorted together on the PCB. The internal output stage is split across these pins; using only one VO pin limits current to 2.0 A. Layout must ensure low-inductance parallel connection.
Is SI8261BCC-ASR certified for reinforced insulation in medical applications?
Yes - SI8261BCC-ASR carries CSA Component Notice 5A certification for IEC 60601-1, supporting up to 250 VRMS working voltage and 2 MOPP (Means of Patient Protection), making it suitable for isolated auxiliary supplies in diagnostic imaging and patient-monitoring equipment.
Can SI8261BCC-ASR drive SiC MOSFETs effectively?
Yes - SI8261BCC-ASR's 4.0 A sink, <60 ns propagation delay, and 50 kV/µs CMTI make it well-suited for driving 650 V/1200 V SiC MOSFETs in high-frequency (>100 kHz) topologies. Its low ROL (0.8 Ω) minimizes Miller plateau time and improves switching controllability.
SI8261BCC-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si826x
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 1
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 35kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 60ns, 50ns
- Pulse Width Distortion (Max):
- 28ns
- Rise / Fall Time (Typ):
- 5.5ns, 8.5ns
- Current - Output High, Low:
- 500mA, 1.2A
- Current - Peak Output:
- 600mA, 4A
- Voltage - Forward (Vf) (Typ):
- 2.8V (Max)
- Current - DC Forward (If) (Max):
- 30 mA
- Voltage - Output Supply:
- 6.5V ~ 30V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
- Approval Agency:
- CQC, CSA, UL, VDE
SI8261BCC-ASR FAQ
1.How can I place an order for SI8261BCC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8261BCC-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 SI8261BCC-ASR reliable?
The price and inventory of SI8261BCC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8261BCC-ASR is usually 5 days.
3.What payment methods are accepted for SI8261BCC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8261BCC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8261BCC-ASR?
SI8261BCC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8261BCC-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 SI8261BCC-ASR?
For technical support, including SI8261BCC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8261BCC-ASR requirements.
6.How does Aetrix verify that SI8261BCC-ASR is sourced from the original manufacturer or authorized distributors?
All SI8261BCC-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 SI8261BCC-ASR meets industry standards.
7.What is the process for return or replacement of SI8261BCC-ASR?
All SI8261BCC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8261BCC-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 SI8261BCC-ASR part is unused and in its original packaging.
Return procedure for SI8261BCC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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