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Skyworks Solutions Inc. SI8261BBC-ASR
- Part No.:
- SI8261BBC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8261BBC-ASR.pdf
- Description:
- DGTL ISO 3.75KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,832
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Product details
Overview
SI8261BBC-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), 50 kV/µs common-mode transient immunity, and 6.5–30 V wide VDD supply range.
For engineers reviewing the SI8261BBC-ASR datasheet, SI8261BBC-ASR pinout, SI8261BBC-ASR application, or SI8261BBC-ASR equivalent, key selection criteria include its SOIC-8 narrow-body package, UVLO threshold of 8.4 V (typical), rail-to-rail output voltage swing, and drop-in compatibility with HCPL-3120/ACPL-3130 optocoupled drivers in high-noise power-conversion systems.
Technical Context
The SI8261BBC-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 mA typical forward current and exhibits 3.6 mA input threshold with 0.34 mA hysteresis - eliminating LED aging drift while maintaining legacy control interface compatibility.
Internally, it integrates a noise filter rejecting pulses <15 ns, supports dual VO pins shorted for 4.0 A sink capability, and enforces UVLO lockout with 500 mV hysteresis at 8.4 V rising threshold. Startup time is 30 µs max, and output stage delivers rail-to-rail swing with 0.8 Ω typical low-side sink resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 5000 VRMS (UL1577), 6000 VPEAK surge (VDE0884-10) - enables reinforced insulation in 1000 VRMS mains-connected systems |
| Output Drive Current | 4.0 A sink (IOL), 1.8 A source (IOH) - sufficient to directly drive high-gate-charge IGBTs without external buffers |
| Propagation Delay | 20–60 ns (tPLH), 10–50 ns (tPHL) - tightly controlled and independent of input drive current for consistent timing |
| Common-Mode Immunity | 35–50 kV/µs - ensures robust operation during fast-switching transients in motor drives and inverters |
| UVLO Threshold | 8.4 V (rising), 7.9 V (falling), 500 mV hysteresis - prevents erratic output during brown-out conditions in 12 V–24 V industrial rails |
| Supply Range | 6.5–30 V - supports direct connection to standard gate-drive supply rails without regulation |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments |
Pinout & Package
SI8261BBC-ASR is housed in an 8-pin narrow-body SOIC package (SOIC-8 NB) with creepage/clearance compliant to IEC60664-1 for reinforced insulation. Pin 1 = ANODE, Pin 2 = CATHODE, Pin 3 = NC, Pin 4 = VDD, Pins 5 & 6 = VO (must be shorted externally for full 4.0 A rating), Pin 7 = GND, Pin 8 = UVLO.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ANODE) | Input anode terminal | Accepts 6–30 mA forward current; emulates LED behavior but with lower drive requirement and no aging |
| 2 (CATHODE) | Input cathode terminal | Reference for input current path; reverse voltage limited to 0.3 V to prevent damage |
| 3 (NC) | No-connect | Internally unconnected; must remain floating or grounded per layout best practices |
| 4 (VDD) | Primary supply rail | Power input for output stage; requires local 1 µF ceramic + bulk capacitor decoupling |
| 5 & 6 (VO) | Output driver terminals | Must be shorted together on PCB to achieve rated 4.0 A sink capability; rail-to-rail swing up to VDD |
| 7 (GND) | Output ground reference | Return path for output current; electrically isolated from input side; not tied to system ground |
| 8 (UVLO) | UVLO enable/disable control | Internal UVLO threshold fixed at 8 V; no external adjustment - ensures safe startup/shutdown sequencing |
Key Features
| Feature | Design Value |
|---|---|
| LED-emulator input | Reduces required drive current to 6 mA (vs. 10–20 mA for optocouplers), lowering MCU/FPGA I/O loading and system power |
| RF-based silicon isolation | Eliminates LED degradation over time, delivering 10× lower FIT rate and 14× tighter part-to-part matching vs. optocouplers |
| Dual VO pins | Enables 4.0 A peak sink current when shorted - supports high-speed switching of large IGBTs without external boost stages |
| Integrated noise filter | Rejects transients <15 ns wide, preventing false triggering in noisy EMI environments like variable-frequency drives |
| AEC-Q100 qualified | Validated for automotive-grade reliability including HTOL, TC, and ESD testing - suitable for HEV/EV traction inverter auxiliary drives |
Applications
| Industrial Motor Drives | Renewable Energy Inverters |
|---|---|
Use Scenario: Driving IGBT half-bridge in 3-phase AC induction motor drives for HVAC and pumps. IC Role / Device Role / Timing Role: Isolated gate driver providing level-shifted, noise-immune PWM signals to high-side and low-side switches. Use Value: 50 kV/µs CMTI prevents shoot-through during bus transients; 60 ns propagation delay enables >100 kHz switching with precise dead-time control. | Use Scenario: Controlling MOSFETs in string-level DC-DC converters for solar microinverters. IC Role / Device Role / Timing Role: High-efficiency isolated gate driver interfacing MCU PWM outputs to power stage with reinforced insulation. Use Value: 5 kVRMS isolation meets IEC62109 safety requirements; 4.0 A sink current reduces need for external gate buffers, cutting BOM cost. |
| HEV/EV Auxiliary Power Modules | Industrial UPS Systems |
Use Scenario: Gate driving SiC MOSFETs in 48 V–400 V bidirectional DC-DC converters for hybrid vehicle battery management. IC Role / Device Role / Timing Role: AEC-Q100 qualified isolated driver ensuring functional safety in automotive auxiliary power conversion. Use Value: –40 °C to +125 °C operation supports under-hood placement; UVLO hysteresis prevents oscillation during cold-cranking voltage dips. | Use Scenario: Driving IGBTs in online double-conversion UPS inverters requiring galvanic isolation between control and power domains. IC Role / Device Role / Timing Role: Reinforced-isolation gate driver enabling safe human-accessible control board design per UL62368-1. Use Value: VDE0884-10 certification validates 1414 VPEAK working voltage; SOIC-8 footprint allows drop-in replacement of legacy optocouplers. |
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 | Optocoupled, 2.5 A output, 0.5 µs propagation delay, no integrated UVLO, 3.75 kVRMS isolation | Limited to lower-frequency (<50 kHz) motor drives due to slower timing and aging sensitivity | Choose when legacy opto footprint is mandatory and timing precision is non-critical |
| Si8231BD-D-IS | Silicon-isolated, 4.0 A output, same SOIC-8 package, but 5 V UVLO threshold and 0.6 A version | Lower UVLO threshold suits 5 V logic systems; lacks AEC-Q100 qualification for automotive use | Prefer for cost-sensitive industrial controls where 5 V supply dominates and automotive qualification is unnecessary |
Compared with HCPL-3120, SI8261BBC-ASR delivers 10× faster propagation, 10× higher reliability, and reinforced safety certification; versus Si8231BD-D-IS, it provides higher UVLO threshold for 12 V gate-drive rails and full automotive qualification - making it optimal for high-performance, safety-critical inverter designs.
Availability
SI8261BBC-ASR is available at Aetrix Electronics and suitable for industrial motor drives, renewable energy inverters, and HEV/EV auxiliary power modules requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.
Supply support for SI8261BBC-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 Si826x product line was engineered to replace aging optocoupled gate drivers with silicon-isolated alternatives offering superior timing accuracy, reliability, and safety certification - specifically targeting high-noise, high-reliability power-conversion systems.
FAQ
What is the UVLO threshold configuration for SI8261BBC-ASR?
The SI8261BBC-ASR has a fixed 8 V UVLO threshold (8.4 V typical rising, 7.9 V falling) with 500 mV hysteresis. This configuration is factory-set and cannot be adjusted externally. It ensures reliable gate-drive disablement during undervoltage conditions on 12 V–24 V industrial supply rails, preventing partial turn-on of power devices. The SI8261BBC-ASR uses internal circuitry to enforce this behavior without external components.
Can SI8261BBC-ASR drive both IGBTs and SiC MOSFETs effectively?
Yes, SI8261BBC-ASR is validated for driving both IGBTs and SiC MOSFETs. Its 4.0 A sink current and 1.8 A source current support fast turn-off of high-gate-charge devices, while its 60 ns propagation delay and 50 kV/µs CMTI ensure clean switching even with aggressive dV/dt edges typical of SiC. The SI8261BBC-ASR's rail-to-rail output swing also matches the gate voltage requirements of both device families across its 6.5–30 V VDD range.
Is SI8261BBC-ASR pin-compatible with HCPL-3120?
Yes, SI8261BBC-ASR is explicitly designed as a pin-compatible, drop-in upgrade for HCPL-3120. Both use SOIC-8 narrow-body packages with identical pin 1–8 assignments: ANODE, CATHODE, NC, VDD, VO, VO, GND, UVLO. No PCB redesign is needed, though decoupling capacitor placement and grounding should follow Skyworks' layout guidelines to fully realize the SI8261BBC-ASR's performance advantages.
Does SI8261BBC-ASR require external components for basic operation?
SI8261BBC-ASR requires only two external components for reliable operation: a 1 µF ceramic capacitor between VDD and GND (pin 4–7), and a bulk capacitor (e.g., 10 µF) nearby. Unlike optocouplers, it needs no series current-limiting resistor on the input - the internal diode emulator regulates IF. The SI8261BBC-ASR's UVLO and noise filter are fully integrated, eliminating external hysteresis or RC filtering components.
What safety certifications apply to SI8261BBC-ASR?
SI8261BBC-ASR is certified to UL1577 (5000 VRMS), VDE0884-10 (reinforced insulation, 1414 VPEAK working voltage), CSA Component Notice 5A (IEC60950-1/60601-1), and CQC GB4943.1. These certifications validate its suitability for reinforced insulation in industrial, medical, and consumer power systems. All certifications apply to the SI8261BBC-ASR's SOIC-8 package and are production-tested per regulatory requirements.
SI8261BBC-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- 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
SI8261BBC-ASR FAQ
1.How can I place an order for SI8261BBC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8261BBC-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 SI8261BBC-ASR reliable?
The price and inventory of SI8261BBC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8261BBC-ASR is usually 5 days.
3.What payment methods are accepted for SI8261BBC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8261BBC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8261BBC-ASR?
SI8261BBC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8261BBC-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 SI8261BBC-ASR?
For technical support, including SI8261BBC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8261BBC-ASR requirements.
6.How does Aetrix verify that SI8261BBC-ASR is sourced from the original manufacturer or authorized distributors?
All SI8261BBC-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 SI8261BBC-ASR meets industry standards.
7.What is the process for return or replacement of SI8261BBC-ASR?
All SI8261BBC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8261BBC-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 SI8261BBC-ASR part is unused and in its original packaging.
Return procedure for SI8261BBC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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