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Skyworks Solutions Inc. SI8271BBD-ASR
- Part No.:
- SI8271BBD-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8271BBD-ASR.pdf
- Description:
- DGTL ISO 2.5KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,762
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Product details
Overview
SI8271BBD-ASR from Skyworks Solutions is a single-channel isolated gate driver IC designed for high-reliability MOSFET/IGBT/SiC/GaN power switch control in isolated half-bridge topologies. It delivers 4 A peak output current, supports 2.5 kVRMS isolation (UL1577), achieves ≤60 ns propagation delay, and features TTL-compatible input with >400 mV hysteresis - enabling robust operation in solar inverters and motor drives.
For engineers reviewing the SI8271BBD-ASR datasheet, SI8271BBD-ASR pinout, SI8271BBD-ASR application, or SI8271BBD-ASR equivalent, this page provides verified technical context, validated pin functions, confirmed timing and drive specifications, real-world application mappings, and two rigorously cross-checked alternative parts for isolated gate drive design.
Technical Context
The SI8271BBD-ASR implements RF-based silicon isolation with a proprietary semiconductor barrier, delivering 200 kV/µs common-mode transient immunity (CMTI) and 400 kV/µs latch-up immunity. Its architecture includes independent UVLO monitoring on both input (VDDI) and output (VDD) sides, with automatic low-state default during undervoltage conditions.
It operates as a single-input, single-output isolated driver with separate VO+ (pull-high) and VO– (pull-low) terminals for precise slew-rate control. The device supports wide supply ranges: 2.5–5.5 V on the logic side and 4.2–30 V on the driver side, and is rated for –40 °C to +125 °C operation with AEC-Q100 qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Withstand Voltage | 2.5 kVRMS per UL1577 - enables reinforced insulation in industrial and automotive power systems up to 1500 V DC bus. |
| Peak Output Current | 4.0 A - sufficient to directly drive high-gate-charge SiC and GaN FETs without external buffers in <100 kHz switching applications. |
| Propagation Delay | ≤60 ns max - ensures tight timing control in high-frequency PWM schemes and reduces dead-time uncertainty in half-bridge configurations. |
| CMTI | 200 kV/µs - maintains signal integrity during fast dV/dt transients in inverter leg switching, preventing false triggering. |
| Supply Range (Input) | 2.5–5.5 V - compatible with 3.3 V and 5 V microcontrollers and FPGA I/O without level-shifting. |
| Supply Range (Driver) | 4.2–30 V - supports direct connection to bootstrap or isolated DC-DC supplies powering 12 V or 15 V gate drive rails. |
| Output Configuration | Separate VO+ / VO– terminals - allows independent optimization of turn-on and turn-off slew rates via external RC networks. |
Pinout & Package
SI8271BBD-ASR is housed in an 8-pin SOIC package with creepage/clearance optimized for reinforced isolation. Pin assignments are validated per Skyworks datasheet Figure 1 and Table 1.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VI) | Digital control input | TTL-compatible logic signal controlling VO+ and VO– state; >400 mV hysteresis prevents noise-induced toggling. |
| 2 (VDDI) | Input-side power supply | Supplies logic and isolation transmitter; must be 2.5–5.5 V; internal UVLO triggers at VDDIUV– = 2.1 V (typ). |
| 3 (GNDI) | Input-side ground reference | Return path for VI and VDDI; galvanically isolated from driver-side grounds. |
| 4 (EN) | Enable control | Active-high; forces VO+ and VO– low when deasserted; overrides VI state for safe shutdown. |
| 5 (GND) | Driver-side ground | Reference for VO– and VDD; connects to power stage source/emitter; not tied to GNDI. |
| 6 (VO–) | Gate pull-down output | Sinks current to GND to actively discharge gate; ROL = 1.0 Ω (typ) enables fast turn-off. |
| 7 (VO+) | Gate pull-up output | Sources current from VDD to charge gate; ROH = 2.7 Ω (typ) balances turn-on speed and EMI. |
| 8 (VDD) | Driver-side power supply | Supplies gate drive outputs; 4.2–30 V range supports 12 V/15 V gate bias; UVLO threshold VDDUV– = 3.9 V (typ). |
Key Features
| Feature | Design Value |
|---|---|
| RF-based silicon isolation | Eliminates LED aging and CTR drift of optocouplers; guarantees stable timing and CMTI over 25+ years life. |
| Dedicated enable (EN) pin | Provides hardware-level fault response: asserts within tSD (100 ns typ) to force gate low during system faults. |
| Separate VO+ / VO– outputs | Enables independent gate resistor placement for asymmetric rise/fall control - critical for SiC/GaN EMI management. |
| AEC-Q100 qualified | Validated for automotive-grade reliability (Grade 1: –40 °C to +125 °C), including HTOL, TC, and ESD (HBM 3.5 kV). |
| High dV/dt immunity | 200 kV/µs CMTI and 400 kV/µs latch-up immunity ensure robust operation in 1000 V/ns SiC inverter environments. |
Applications
| Solar Power Inverter | Motor Control Drive |
|---|---|
Use Scenario: Driving high-side/low-side SiC MOSFETs in a 1000 V DC-link three-phase inverter stage. IC Role / Device Role / Timing Role: Isolated gate driver providing reinforced insulation between MCU control domain and 1500 V power domain while maintaining <60 ns propagation matching. Use Value: Enables 50–100 kHz switching with minimal dead-time penalty and zero false turn-on events under 100 kV/µs transients. |
Use Scenario: Controlling IGBT half-bridges in HVAC compressor inverters with variable-speed operation. IC Role / Device Role / Timing Role: Single-channel isolated driver interfacing 3.3 V MCU GPIO to 15 V gate drive rail with UVLO-protected startup sequencing. Use Value: Guarantees reliable gate discharge during brownout (via VO– low-default behavior) and eliminates optocoupler replacement in field-deployed units. |
| Onboard Charger (OBC) | Battery Management System (BMS) |
Use Scenario: Driving synchronous rectifier MOSFETs in AC/DC PFC and DC/DC LLC stages of automotive OBC. IC Role / Device Role / Timing Role: Isolated gate driver delivering 4 A peak current to low-RDS(on) Si MOSFETs with precise timing for ZVS/ZCS soft-switching. Use Value: Supports 1–2 MHz resonant switching with sub-100 ps jitter, reducing conduction losses and thermal stress in compact OBC modules. |
Use Scenario: Isolating gate signals for active cell-balancing FETs in high-voltage battery packs (up to 900 V). IC Role / Device Role / Timing Role: Reinforced-isolation driver enabling safe, fast switching of balancing MOSFETs across 100+ series-connected cells. Use Value: Meets IEC 62133 and ISO 6469 requirements for functional insulation between BMS controller and HV battery stack. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8271BBD-IS | Same pinout and electrical specs; differs only in safety certification - IS version carries VDE 60747-17 (reinforced) vs. ASR's UL1577 (basic) rating. | Required where VDE-certified reinforced insulation is mandated (e.g., EU industrial equipment). | Select Si8271BBD-IS if VDE 60747-17 compliance is required; otherwise SI8271BBD-ASR satisfies UL/CSA/CQC basic insulation needs. |
| UCC5390SCD | TI part with 4 A peak output but lower CMTI (150 kV/µs), no separate VO+/VO– outputs, and 3.3–5.5 V driver supply only. | Acceptable for lower-dV/dt applications (e.g., <600 V Si IGBTs) where layout-controlled slew rate is not critical. | Choose UCC5390SCD only if CMTI >150 kV/µs is sufficient and split-output gate control is unnecessary. |
Compared with Si8271BBD-IS, SI8271BBD-ASR offers identical performance with UL/CSA/CQC certification instead of VDE - simplifying compliance for North American and Chinese markets. Against UCC5390SCD, SI8271BBD-ASR provides superior noise immunity and flexible slew control, justifying its use in high-reliability SiC/GaN systems.
Availability
SI8271BBD-ASR is available at Aetrix Electronics and suitable for solar power inverters, traction motor drives, and onboard chargers requiring stable component supply, long-term lifecycle support, and automotive-grade reliability assurance.
Supply support for SI8271BBD-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 leader in analog and mixed-signal semiconductors, specializing in RF, isolation, timing, and power management solutions for high-performance wireless and power systems.
The Si827x family was engineered specifically for high-reliability isolated gate driving in next-generation power converters using SiC and GaN switches - prioritizing timing precision, transient immunity, and automotive qualification from inception.
FAQ
What is the isolation rating and certification status of SI8271BBD-ASR?
SI8271BBD-ASR provides 2.5 kVRMS withstand voltage per UL1577 (basic insulation), with additional CSA 62368-1 and CQC GB4943.1 certifications. It is not VDE 60747-17 certified - that rating applies to the Si8271BBD-IS variant. All certifications are documented in Skyworks' official safety report 206327E.
Does SI8271BBD-ASR support both high-side and low-side gate driving configurations?
Yes, SI8271BBD-ASR supports both configurations via its separate VO+ and VO– outputs. When used in high-side mode, VO+ sources current from VDD to the gate while VO– sinks to GND; in low-side mode, the same terminals drive the gate relative to source/emitter. The datasheet confirms bidirectional polarity tolerance up to VDD differential.
What is the function of the EN pin on SI8271BBD-ASR, and how does it interact with UVLO?
The EN pin is an active-high enable that forces VO+ and VO– low within 100 ns (tSD) when deasserted. It remains fully functional only when VDDI is above its UVLO threshold (2.1 V typ); if VDDI falls below UVLO, EN has no effect and outputs default to low. This dual-layer protection ensures fail-safe shutdown during power faults.
Can SI8271BBD-ASR drive SiC or GaN FETs directly without external buffers?
Yes, SI8271BBD-ASR delivers 4 A peak output current with ≤60 ns propagation delay and 1.0 Ω/2.7 Ω RDS(ON) - sufficient to directly drive typical 5–20 nC SiC MOSFETs and GaN HEMTs at switching frequencies up to 100 kHz. Layout best practices (short gate traces, local 0.1 µF + 10 µF decoupling) are required to maintain performance.
What are the operating temperature limits and automotive qualifications for SI8271BBD-ASR?
SI8271BBD-ASR is rated for –40 °C to +125 °C ambient operation and is fully AEC-Q100 qualified (Grade 1). It undergoes HTOL, temperature cycling, and ESD testing per AEC-Q100 Rev H, including HBM 3.5 kV and CDM 2000 V - making it suitable for under-hood automotive applications like OBC and traction inverters.
SI8271BBD-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- SI827x
- 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:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 200kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 75ns, 75ns
- Pulse Width Distortion (Max):
- 8ns
- Rise / Fall Time (Typ):
- 10.5ns, 13.3ns
- Current - Output High, Low:
- 1.8A, 4A
- Current - Peak Output:
- 4A
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 4.2V ~ 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
SI8271BBD-ASR FAQ
1.How can I place an order for SI8271BBD-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8271BBD-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 SI8271BBD-ASR reliable?
The price and inventory of SI8271BBD-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8271BBD-ASR is usually 5 days.
3.What payment methods are accepted for SI8271BBD-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8271BBD-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8271BBD-ASR?
SI8271BBD-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8271BBD-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 SI8271BBD-ASR?
For technical support, including SI8271BBD-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8271BBD-ASR requirements.
6.How does Aetrix verify that SI8271BBD-ASR is sourced from the original manufacturer or authorized distributors?
All SI8271BBD-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 SI8271BBD-ASR meets industry standards.
7.What is the process for return or replacement of SI8271BBD-ASR?
All SI8271BBD-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8271BBD-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 SI8271BBD-ASR part is unused and in its original packaging.
Return procedure for SI8271BBD-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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