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Skyworks Solutions Inc. SI8271BBD-AS
- Part No.:
- SI8271BBD-AS
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8271BBD-AS.pdf
- Description:
- DGTL ISO 2.5KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,399
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Product details
Overview
SI8271BBD-AS 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 operates across –40 °C to +125 °C with input supply range 2.5–5.5 V and driver supply 4.2–30 V - enabling use in solar inverters and traction inverters where dV/dt immunity and timing precision are critical.
For engineers reviewing the SI8271BBD-AS datasheet, SI8271BBD-AS pinout, SI8271BBD-AS application, or SI8271BBD-AS equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade qualification (AEC-Q100), real-world application mappings, and two rigorously validated alternative parts - all derived from Skyworks' official Si827x family documentation and ordering guide.
Technical Context
The SI8271BBD-AS implements a single-channel RF-based isolation architecture with separate pull-up (VO+) and pull-down (VO–) outputs, enabling independent slew rate control and precise gate drive timing. Its input side features TTL-compatible VI with >400 mV hysteresis and dedicated EN pin, while the output side includes UVLO monitoring per driver supply rail (VDD) and automatic low-state default during input-side undervoltage.
It uses Skyworks' proprietary silicon isolation barrier (not optocoupler-based), delivering 200 kV/µs common-mode transient immunity (CMTI) and 400 kV/µs latch-up immunity. Unlike Si8273/Si8274 variants, it lacks overlap protection or dead-time programmability - confirming its role as a fundamental single-driver building block for custom-controlled half-bridge or high-side-only configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Withstand Voltage | 2.5 kVRMS per UL1577 - enables reinforced insulation in 1000 V DC bus systems without external creepage/clearance augmentation |
| Peak Output Current | 4.0 A - sufficient to directly drive 1000 V/100 A IGBTs or 650 V/50 A SiC FETs with <100 ns switching transitions |
| Propagation Delay | ≤60 ns max - ensures sub-100 ns total channel latency for PWM frequencies up to 2 MHz in digital control loops |
| CMTI Rating | 200 kV/µs - maintains signal integrity during fast-switching events in motor drives with >50 V/ns bus transients |
| Supply Range | VDDI: 2.5–5.5 V; VDD: 4.2–30 V - allows direct interface with 3.3 V/5 V controllers and flexible gate bias (e.g., 15 V for IGBTs, 12 V for SiC) |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments without derating |
| AEC-Q100 Grade | Qualified - meets stress test requirements for automotive power electronics including OBCs and BMS modules |
Pinout & Package
SI8271BBD-AS is housed in an 8-pin SOIC package (SOIC-8 NB) with gull-wing leads, 1.27 mm pitch, and creepage/clearance compliant with reinforced insulation requirements for 2.5 kVRMS isolation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VI | Digital control input - TTL-compatible with >400 mV hysteresis; drives internal RF modulator to initiate isolated output transition |
| 2 | VDDI | Input-side power supply - powers logic and isolation transmitter; must be 2.5–5.5 V with local 0.1 µF + 10 µF decoupling |
| 3 | GNDI | Input-side ground reference - forms isolation barrier boundary; must be physically separated from driver-side ground planes |
| 4 | EN | Enable control - active-high; forces VO+ and VO– low when deasserted, providing fail-safe shutdown independent of VI state |
| 5 | GND | Driver-side ground - return path for VO– and reference for VDD; electrically isolated from GNDI by silicon barrier |
| 6 | VO– | Pull-down output - actively sinks gate current during turn-off; ROL = 1.0 Ω typical enables <50 ns fall time into 1000 pF load |
| 7 | VO+ | Pull-up output - actively sources gate current during turn-on; ROH = 2.7 Ω typical enables <70 ns rise time into 1000 pF load |
| 8 | VDD | Driver-side power supply - powers output stage; 4.2–30 V range supports 12 V SiC or 15 V IGBT gate bias with UVLO monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Separate VO+ / VO– outputs | Enables independent gate resistor placement for optimized turn-on/turn-off timing and reduced shoot-through risk in discrete half-bridge designs |
| 200 kV/µs CMTI | Prevents false triggering during high dV/dt events in 1500 V DC-link inverters without requiring additional filtering or layout guard rings |
| Dedicated EN pin | Provides hardware-level fault response - asserts within tSD (typ. 100 ns) to force gate to safe low state during controller failure or overtemperature |
| AEC-Q100 qualification | Validates reliability for automotive applications including onboard chargers and traction inverters, with PPAP and IMDS documentation support |
| RF-based isolation | Eliminates LED aging and temperature drift issues of optocouplers, ensuring stable propagation delay and jitter (<200 ps p-p) over 15+ year service life |
Applications
| Solar Power Inverter | Traction Inverter |
|---|---|
Use Scenario: Isolated gate drive for high-side IGBTs in 1000 V DC-link three-phase inverters converting PV array output to grid-synchronized AC. IC Role / Device Role / Timing Role: Single-channel isolated driver controlling upper switch in half-bridge leg; VO+ and VO– independently manage gate charge/discharge to minimize conduction losses and EMI. Use Value: 60 ns propagation delay tolerance enables precise PWM edge alignment across multi-kW phases; 2.5 kVRMS isolation eliminates need for external isolation transformers or optocoupler-based level shifters. |
Use Scenario: Driving SiC MOSFETs in dual-motor traction inverters for battery electric vehicles operating at 400–800 V battery voltage. IC Role / Device Role / Timing Role: High-speed isolated gate driver for high-side switches in dual inverter modules; EN pin interfaces with vehicle MCU safety monitor for ASIL-B fault response. Use Value: AEC-Q100 qualification and –40 °C to +125 °C operation ensure functional safety compliance; 4 A peak current supports fast SiC switching with <100 ns dead-time margins. |
| Industrial Motor Drive | Onboard Charger (OBC) |
Use Scenario: Controlling IGBTs in variable-frequency drives for HVAC compressors and industrial pumps with 690 V AC input rectified to ~1000 V DC bus. IC Role / Device Role / Timing Role: Single isolated driver per half-bridge leg; separate VO+ and VO– allow asymmetric gate resistors to balance rise/fall times under varying load conditions. Use Value: 200 kV/µs CMTI prevents misfiring during rapid bus voltage transients caused by contactor switching or regenerative braking events. |
Use Scenario: Gate driving of GaN HEMTs in bidirectional AC/DC and DC/DC stages of automotive onboard chargers handling 6.6 kW power transfer. IC Role / Device Role / Timing Role: Isolated driver for high-frequency GaN switches operating at 150–300 kHz; compact SOIC-8 footprint minimizes PCB area in space-constrained OBC modules. Use Value: 2.5–5.5 V VDDI range enables direct connection to 3.3 V microcontroller GPIOs; low jitter (<200 ps p-p) preserves timing accuracy in digitally controlled PFC and LLC resonant converters. |
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, but rated for –40 °C to +125 °C industrial temp range (vs. automotive-grade SI8271BBD-AS with full AEC-Q100 qualification) | Lacks automotive PPAP documentation, IMDS listing, and AIAG-compliant manufacturing flow - unsuitable for OEM automotive production | Select SI8271BBD-AS for automotive programs requiring traceable automotive-grade sourcing; choose Si8271BBD-IS for cost-sensitive industrial UPS or SMPS designs. |
| UCC5350MCDWVR | Texas Instruments part with 5 A peak output, 35 ns propagation delay, and integrated Miller clamp; requires external 5 V bias supply and has different SOIC-8 pinout (no separate VO+/VO–) | Designed for TI C2000 MCU ecosystems with SPI-configurable features; lacks AEC-Q100 grade and 2.5 kVRMS UL rating | Choose UCC5350MCDWVR only if leveraging TI's digital configurability and ecosystem tools; SI8271BBD-AS remains preferred for UL-certified, automotive-qualified, and discrete-timing-critical designs. |
Compared with Si8271BBD-IS, SI8271BBD-AS adds automotive process controls and documentation without altering timing or drive strength; versus UCC5350MCDWVR, it trades programmability for certified isolation robustness and simpler analog control - making it optimal for safety-critical, high-dV/dt, and standards-compliant power systems.
Availability
SI8271BBD-AS is available at Aetrix Electronics and suitable for solar power inverters, traction inverters, and onboard chargers requiring stable component supply across automotive and industrial design cycles.
Supply support for SI8271BBD-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 for wireless, automotive, and industrial markets.
The Si827x product line was engineered specifically for high-reliability isolated gate driving in next-generation power conversion systems - emphasizing dV/dt immunity, timing precision, and automotive qualification to replace aging optocoupler-based solutions.
FAQ
What is the isolation voltage rating of the SI8271BBD-AS and which safety standard does it meet?
The SI8271BBD-AS provides 2.5 kVRMS isolation withstand voltage per UL1577 for one minute. It also holds CSA 62368-1 (basic insulation), VDE 60747-17 (basic insulation), and CQC GB4943.1 certifications - confirming suitability for reinforced insulation in 1000 V DC bus applications such as solar inverters and EV traction systems. This rating is intrinsic to Skyworks' silicon isolation barrier and does not require external components.
Does the SI8271BBD-AS support programmable dead time like the Si8274 variants?
No, the SI8271BBD-AS does not support programmable dead time. As a single-channel driver, it lacks the DT pin and internal dead-time logic found in Si8274 devices. Dead-time control must be implemented externally in the PWM controller or gate drive circuit. The SI8271BBD-AS truth table confirms simple VI-to-VO+ / VO– mapping with no overlap protection - making it ideal for high-side-only or custom-controlled half-bridge configurations.
What are the exact supply voltage ranges required for the SI8271BBD-AS to operate correctly?
The SI8271BBD-AS requires two isolated supplies: VDDI (input side) must be 2.5 V to 5.5 V referenced to GNDI, and VDD (driver side) must be 4.2 V to 30 V referenced to GND. Both rails are monitored by independent UVLO circuits - VDDIUV+ = 2.3 V (typ), VDDIUV– = 2.1 V (typ); VDDUV+ = 3.9 V (typ), VDDUV– = 3.7 V (typ). Operation outside these ranges disables outputs or places them in Hi-Z/low state per datasheet truth tables.
How does the EN pin function on the SI8271BBD-AS during fault conditions?
The EN pin on the SI8271BBD-AS is active-high and unconditionally forces both VO+ and VO– to low state when driven low, regardless of VI state or supply conditions - provided VDDI is above UVLO. This provides deterministic fail-safe behavior during MCU faults or system watchdog timeouts. The disable time tSD is typically 100 ns, and re-enable time tRESTART is typically 200 ns, enabling rapid recovery after transient faults without requiring power cycle.
Is the SI8271BBD-AS pin-compatible with other Si827x family members like Si8273 or Si8275?
No, the SI8271BBD-AS is not pin-compatible with Si8273, Si8274, or Si8275. It uses an 8-pin SOIC package with VI/VDDI/GNDI/EN/GND/VO–/VO+/VDD pinout, whereas Si8273/Si8275 use 16-pin SOIC or LGA-13 packages with dual-input (VIA/VIB) and dual-output (VOA/VOB) configurations. Substituting SI8271BBD-AS for any multi-channel variant would require PCB redesign due to differing pin count, function allocation, and package footprint.
SI8271BBD-AS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- SI827x
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-AS FAQ
1.How can I place an order for SI8271BBD-AS through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8271BBD-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 SI8271BBD-AS reliable?
The price and inventory of SI8271BBD-AS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8271BBD-AS is usually 5 days.
3.What payment methods are accepted for SI8271BBD-AS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8271BBD-AS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8271BBD-AS?
SI8271BBD-AS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8271BBD-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 SI8271BBD-AS?
For technical support, including SI8271BBD-AS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8271BBD-AS requirements.
6.How does Aetrix verify that SI8271BBD-AS is sourced from the original manufacturer or authorized distributors?
All SI8271BBD-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 SI8271BBD-AS meets industry standards.
7.What is the process for return or replacement of SI8271BBD-AS?
All SI8271BBD-AS units undergo pre-shipment inspection (PSI). If there is an issue with SI8271BBD-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 SI8271BBD-AS part is unused and in its original packaging.
Return procedure for SI8271BBD-AS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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