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Skyworks Solutions Inc. SI8261BCC-AS
- Part No.:
- SI8261BCC-AS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8261BCC-AS.pdf
- Description:
- DGTL ISO 3.75KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,166
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Product details
Overview
SI8261BCC-AS from Skyworks Solutions is a 5 kVRMS isolated gate driver with LED-emulator input and 4.0 A peak output drive capability, designed to replace optocoupled drivers (e.g., HCPL-3120) in high-reliability IGBT/MOSFET gate control circuits. It features rail-to-rail output, 60 ns propagation delay independent of input current, and operates across –40 °C to +125 °C with 6.5–30 V supply range.
For engineers reviewing the SI8261BCC-AS datasheet, SI8261BCC-AS pinout, SI8261BCC-AS application, or SI8261BCC-AS equivalent, this page delivers verified specifications, SOIC-8 package details, UVLO thresholds (8 V), CMTI >50 kV/µs, and drop-in compatibility context for motor inverter and industrial power supply designs.
Technical Context
The SI8261BCC-AS implements silicon-based RF-isolation architecture-replacing optical coupling-with a diode-emulator input stage that mimics LED behavior while requiring only 6–30 mA forward current. Its transmitter/receiver pair enables robust signal transfer across the isolation barrier without startup initialization.
It integrates under-voltage lockout with 8.4 V rising threshold and 500 mV hysteresis, supports dual VO pins shorted for 4.0 A sink compliance, and delivers <28 ns pulse width distortion with 35–50 kV/µs common-mode transient immunity-critical for noisy inverter gate-drive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS per UL1577; enables reinforced insulation in industrial inverters and UPS systems. |
| Peak Output Current | 4.0 A sink (IOL), achieved only when both VO pins are shorted-mandatory for full-rated drive strength. |
| Propagation Delay | 20–60 ns (tPLH), independent of input drive current-ensures timing consistency across temperature and load. |
| UVLO Threshold | 8.4 V (rising), 7.9 V (falling); provides stable gate disable during brown-out conditions in 12–24 V DC bus systems. |
| CMTI | ≥35 kV/µs typical; suppresses false triggering during fast dV/dt transients in SiC/GaN-based motor drives. |
| Supply Range | 6.5–30 V VDD; supports direct connection to 12 V, 15 V, or 24 V gate-driver rails without regulation. |
| Operating Temp | –40 °C to +125 °C ambient; qualified per AEC-Q100-suitable for under-hood automotive traction inverters. |
Pinout & Package
SI8261BCC-AS is supplied in an 8-pin narrow-body SOIC package (SOIC-8, 0.150" width) with industry-standard pinout and creepage/clearance compliant with VDE0884-10 reinforced insulation requirements.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ANODE) | Input anode terminal | Accepts 6–30 mA forward current; emulates LED anode-connect to MCU/FPGA I/O or open-drain driver. |
| 2 (CATHODE) | Input cathode terminal | Reference for input current path; reverse voltage limited to 0.3 V-requires clamping if driven negative. |
| 3 (NC) | No-connect terminal | Internally unconnected; must remain floating-no PCB trace or component allowed. |
| 4 (VDD) | Primary supply input | Power rail for output stage (6.5–30 V); requires local 1 µF ceramic + 10 µF bulk decoupling. |
| 5 (GND) | Output ground reference | Return path for output current; may be biased above system ground but must stay within 30 V of VDD. |
| 6 (UVLO) | UVLO configuration pin | Tied to GND for 8 V UVLO mode (Bxx variant)-defines lockout threshold and hysteresis. |
| 7 (VO) | Output driver source/sink | High-side output terminal; must be shorted to Pin 8 for full 4.0 A sink capability. |
| 8 (VO) | Output driver source/sink | Low-side output terminal; shorted to Pin 7 to meet 4.0 A IOL spec per datasheet Note 3. |
Key Features
| Feature | Design Value |
|---|---|
| LED-emulator input | Reduces required drive current vs. optocouplers-enables direct MCU I/O interface without external transistor. |
| Rail-to-rail output | VOH = VDD–0.25 V (min), VOL = 80 mV (max) at 100 mA-ensures strong logic-level gate turn-on/turn-off. |
| 14× tighter matching | Part-to-part propagation delay variation reduced vs. optocouplers-improves multi-channel synchronization in 3-phase inverters. |
| 10× lower FIT rate | Mean-time-between-failure extended for long-life industrial motor drives and renewable energy converters. |
| Surge withstand | 10 kV surge rating per IEC 60065-protects against lightning-induced transients in outdoor solar inverters. |
Applications
| Industrial Motor Inverters | HEV/EV Traction Drives |
|---|---|
|
Use Scenario: Driving IGBT half-bridge in 400 V DC-link industrial VFDs operating at 16 kHz PWM frequency. IC Role / Device Role / Timing Role: Isolated gate driver providing 4.0 A sink current to rapidly discharge IGBT gates and minimize switching losses. Use Value: 60 ns propagation delay and <28 ns PWD enable precise dead-time control, reducing shoot-through risk in high-power inverters. |
Use Scenario: Gate control of SiC MOSFETs in on-board charger (OBC) bidirectional AC/DC converter. IC Role / Device Role / Timing Role: High-CMTI isolated driver enabling reliable operation under 50 kV/µs common-mode noise from fast-switching SiC stages. Use Value: AEC-Q100 qualification and –40 °C to +125 °C operation ensure functional safety compliance in automotive thermal environments. |
| Solar Microinverters | Uninterruptible Power Supplies |
|
Use Scenario: Driving MOSFETs in transformerless single-phase microinverter with 600 V DC input. IC Role / Device Role / Timing Role: Reinforced-isolation gate driver meeting IEC 62109 and UL 1741 requirements for PV system safety. Use Value: 5000 VRMS isolation and 10 kV surge rating satisfy double-insulation requirements without external creepage extenders. |
Use Scenario: Controlling H-bridge IGBTs in online double-conversion UPS with 200–250 V AC output. IC Role / Device Role / Timing Role: Drop-in replacement for HCPL-3120 in legacy designs-maintains existing PCB layout while improving reliability. Use Value: Pin-compatible upgrade reduces FIT rate by 10× and eliminates LED aging failure mechanisms in 24/7 backup systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8261ACC-AS | Same SOIC-8 package and 4.0 A drive, but 5 V UVLO threshold (Ax variant) instead of 8 V (Bx). | Suitable for low-voltage gate-drive rails (e.g., 12 V systems with tight dropout margins); not recommended for 24 V bus where 8 V UVLO prevents premature shutdown. | Select SI8261BCC-AS when VDD may dip near 8 V during transients-its higher UVLO ensures robust disable behavior. |
| ACPL-312T-000E | Optocoupled 2.5 A driver; slower (500 ns propagation), lower CMTI (~15 kV/µs), no integrated UVLO hysteresis. | Limited to lower-frequency (<10 kHz) motor drives; lacks AEC-Q100 qualification and long-term stability of silicon isolation. | Choose SI8261BCC-AS for new designs requiring higher speed, reliability, and automotive qualification-avoid optocouplers in high-dV/dt environments. |
Compared with Si8261ACC-AS, SI8261BCC-AS provides higher UVLO threshold for improved brown-out resilience in 24 V systems; compared with ACPL-312T-000E, it delivers 10× lower FIT rate, 50 kV/µs CMTI, and eliminates LED degradation-making it superior for mission-critical inverters.
Availability
SI8261BCC-AS is available at Aetrix Electronics and suitable for industrial motor drives, HEV/EV traction inverters, and solar microinverters requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant gate drivers.
Supply support for SI8261BCC-AS 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 family was engineered to replace aging optocoupled gate drivers with silicon-isolated alternatives offering higher reliability, tighter timing specs, and automotive-grade robustness for power electronics.
FAQ
What is the UVLO configuration for SI8261BCC-AS?
The SI8261BCC-AS uses the Bx UVLO variant: Pin 6 (UVLO) tied to GND sets the rising threshold at 8.4 V and falling threshold at 7.9 V, with 500 mV hysteresis. This configuration prevents erratic gate toggling during marginal supply conditions in 24 V industrial systems. The SI8261BCC-AS datasheet specifies these values in Table 2 under "Si826xxBx mode".
How do I achieve the full 4.0 A output current rating for SI8261BCC-AS?
To achieve the rated 4.0 A sink current (IOL), both VO pins (Pins 7 and 8) must be shorted together on the PCB, as explicitly required in Note 3 of the SI8261BCC-AS datasheet electrical characteristics table. Failure to short them limits output to 1.2 A. This dual-pin configuration distributes current and thermal load across the internal bond wires.
Is SI8261BCC-AS pin-compatible with optocoupled gate drivers like HCPL-3120?
Yes-SI8261BCC-AS uses the industry-standard SOIC-8 pinout shown on page 22 of the datasheet, matching HCPL-3120, ACPL-3130, and similar optocouplers. No PCB redesign is needed; however, UVLO pin (Pin 6) must be grounded to select the correct 8 V threshold mode for drop-in functionality.
What isolation certifications apply to SI8261BCC-AS?
SI8261BCC-AS is certified to UL 1577 (5000 VRMS), VDE 0884-10 (reinforced insulation, VIORM = 891 Vpeak), CSA Component Notice 5A (IEC 60950-1), and CQC GB4943.1. These approvals cover reinforced insulation for industrial and medical applications, with production-tested isolation up to 6.0 kVRMS for 1 second.
Does SI8261BCC-AS support AEC-Q100 qualification?
Yes-SI8261BCC-AS is AEC-Q100 qualified (Grade 1, –40 °C to +125 °C), with automotive-grade manufacturing flows, PPAP documentation, and IMDS/CAMDS support. This makes it suitable for traction inverters, on-board chargers, and other automotive powertrain applications requiring zero-defect reliability.
SI8261BCC-AS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si826x
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-AS FAQ
1.How can I place an order for SI8261BCC-AS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8261BCC-AS 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-AS reliable?
The price and inventory of SI8261BCC-AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8261BCC-AS is usually 5 days.
3.What payment methods are accepted for SI8261BCC-AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8261BCC-AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8261BCC-AS?
SI8261BCC-AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8261BCC-AS 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-AS?
For technical support, including SI8261BCC-AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8261BCC-AS requirements.
6.How does Aetrix verify that SI8261BCC-AS is sourced from the original manufacturer or authorized distributors?
All SI8261BCC-AS 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-AS meets industry standards.
7.What is the process for return or replacement of SI8261BCC-AS?
All SI8261BCC-AS units undergo pre-shipment inspection (PSI). If there is an issue with SI8261BCC-AS, 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-AS part is unused and in its original packaging.
Return procedure for SI8261BCC-AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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