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Skyworks Solutions Inc. SI8271DBD-ASR
- Part No.:
- SI8271DBD-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8271DBD-ASR.pdf
- Description:
- DGTL ISO 2.5KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,885
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Product details
Overview
SI8271DBD-ASR from Skyworks Solutions is a single-channel isolated gate driver IC designed for high-reliability MOSFET/IGBT/SiC/GaN power switch control in high-dV/dt environments. It delivers 4 A peak output current, supports 2.5 kVRMS isolation (UL1577), achieves ≤60 ns propagation delay, and operates across –40 to +125 °C with input supply range 2.5–5.5 V and driver supply range 4.2–30 V. It is used in solar inverters, motor drives, and onboard chargers where robust transient immunity and precise timing are critical.
For engineers reviewing the SI8271DBD-ASR datasheet, SI8271DBD-ASR pinout, SI8271DBD-ASR application, or SI8271DBD-ASR equivalent, this page provides verified technical context, validated pin functions, confirmed CMTI (200 kV/µs), exact package mapping (SOIC-8 wide-body), and two rigorously cross-checked alternative parts - all aligned with Skyworks' official Si827x family documentation.
Technical Context
The SI8271DBD-ASR implements a single-channel RF-based isolation architecture with separate pull-up (VO+) and pull-down (VO–) outputs for independent slew rate control. Its input side features TTL-compatible VI with >400 mV hysteresis and an EN pin that unconditionally forces outputs low when asserted.
It integrates dedicated undervoltage lockout (UVLO) on both input (VDDI) and output (VDD) sides, ensuring safe startup/shutdown behavior and defaulting VO+ and VO– to Hi-Z or low states per UVLO state. The device uses Skyworks' proprietary silicon isolation barrier, enabling 200 kV/µs common-mode transient immunity and 400 kV/µs latch-up immunity without optical degradation.
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. |
| Propagation Delay | ≤60 ns max - ensures tight timing control in high-frequency switching converters (>100 kHz). |
| CMTI | 200 kV/µs - prevents false triggering in noisy motor drive or inverter environments with fast voltage transients. |
| Supply Ranges | VDDI: 2.5–5.5 V; VDD: 4.2–30 V - supports direct interface with 3.3 V/5 V controllers and wide-range gate drive rails. |
| Operating Temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions. |
| Jitter | 200 ps p-p - minimizes timing uncertainty in synchronous multi-phase topologies. |
Pinout & Package
SI8271DBD-ASR is housed in an 8-pin SOIC wide-body (SOIC-8 WB) package with creepage/clearance optimized for reinforced isolation. Pin 1 is marked with a dot; pin numbering follows standard SOIC convention (counterclockwise from pin 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VI) | Digital control input | TTL-compatible logic signal controlling VO+ and VO– state; >400 mV hysteresis rejects noise on control lines. |
| 2 (VDDI) | Input-side power supply | Supplies isolated input die (2.5–5.5 V); powers internal oscillator, modulator, and EN logic. |
| 3 (GNDI) | Input-side ground reference | Return path for VI and VDDI; galvanically isolated from driver-side grounds. |
| 4 (EN) | Enable control input | Active-high; forces VO+ and VO– low when deasserted - enables system-level fault shutdown. |
| 5 (GND) | Driver-side ground | Reference for VO– and VDD; must be connected to gate driver return path (e.g., source of low-side FET). |
| 6 (VO–) | Pull-down output terminal | Sinks up to 4 A peak; actively pulls gate low during turn-off - critical for fast, controlled FET discharge. |
| 7 (VO+) | Pull-up output terminal | Sources up to 4 A peak; actively drives gate high during turn-on - reduces Miller plateau time. |
| 8 (VDD) | Driver-side power supply | Supplies output driver stage (4.2–30 V); determines gate drive voltage and peak current capability. |
Key Features
| Feature | Design Value |
|---|---|
| Separate VO+ / VO– outputs | Enables independent optimization of turn-on and turn-off slew rates via external gate resistors - essential for EMI control and dv/dt management. |
| UVLO on both sides | Prevents partial operation: input-side UVLO holds outputs inactive until VDDI > 2.5 V; output-side UVLO forces VO low if VDD < 4.2 V. |
| 200 kV/µs CMTI | Ensures reliable operation in high-noise environments like traction inverters or industrial motor drives with fast-switching SiC devices. |
| 60 ns max propagation delay | Supports precise dead-time implementation in half-bridge topologies and enables >1 MHz switching in resonant converters. |
| AEC-Q100 qualified | Validated for automotive applications including onboard chargers and battery management systems - meets stress test requirements for Grade 1 (–40 to +125 °C). |
Applications
| Solar Power Inverter | Industrial Motor Drive |
|---|---|
|
Use Scenario: Driving high-side and low-side IGBTs in three-phase inverter stages handling 1000 V DC link voltage. IC Role / Device Role / Timing Role: Isolated gate driver providing reinforced insulation and 200 kV/µs CMTI to prevent false triggering during rapid bus voltage transitions. Use Value: Enables direct replacement of optocouplers with higher reliability, tighter timing, and no LED aging - extending inverter service life beyond 15 years. |
Use Scenario: Controlling 650 V SiC MOSFETs in servo amplifier half-bridges operating at 80 kHz PWM frequency. IC Role / Device Role / Timing Role: Single-channel driver delivering 4 A peak current to minimize gate charge time and reduce conduction losses. Use Value: Achieves ≤60 ns propagation delay and 200 ps jitter - critical for maintaining phase accuracy across multi-axis motion control systems. |
| Onboard Charger (OBC) | Uninterruptible Power Supply (UPS) |
|
Use Scenario: Gate driving of GaN HEMTs in AC/DC PFC and DC/DC LLC stages within compact 6.6 kW OBC modules. IC Role / Device Role / Timing Role: Isolated driver supporting 30 V VDD rail and operating across –40 to +125 °C ambient - qualified per AEC-Q100 Grade 1. Use Value: Meets automotive PPAP requirements with IMDS/CAMDS support and AIAG-compliant documentation - accelerates OEM qualification. |
Use Scenario: Driving high-voltage IGBTs in double-conversion UPS inverters requiring fail-safe shutdown during grid faults. IC Role / Device Role / Timing Role: Driver with dedicated EN pin enabling immediate gate discharge upon system fault detection. Use Value: Ensures zero-output-state safety during brownouts or controller failure - preventing shoot-through and catastrophic bus short circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8271ADBD-ASR | Same pinout and electrical specs, but rated for –55 to +125 °C (ZS suffix) and includes deglitch circuit (15 ns typical delay added to propagation). | Required for extended temperature automotive or military applications; deglitch improves noise immunity in ultra-high-noise environments. | Select Si8271ADBD-ASR only if extended temp range or enhanced noise rejection is mandatory; otherwise SI8271DBD-ASR offers lower latency. |
| UCC23513DWYR | TI's 5.7 kVRMS reinforced isolator with 4 A output, but uses capacitive isolation and has 50 ns max propagation delay; different pinout (SOIC-8, but non-compatible). | Offers higher isolation rating and slightly faster timing, but lacks separate VO+/VO– outputs - limits slew rate tuning flexibility. | Choose UCC23513DWYR for designs prioritizing maximum isolation voltage over gate drive flexibility; not drop-in compatible. |
Compared with SI8271DBD-ASR, Si8271ADBD-ASR trades 15 ns added propagation delay for extended temperature and deglitching, while UCC23513DWYR sacrifices independent slew control for higher isolation rating and marginally faster timing - making SI8271DBD-ASR optimal for cost-sensitive, high-flexibility industrial and automotive gate drive where 2.5 kVRMS suffices.
Availability
SI8271DBD-ASR is available at Aetrix Electronics and suitable for solar power inverters, industrial motor drives, and onboard chargers requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.
Supply support for SI8271DBD-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 precision timing technologies.
The Si827x product line was engineered specifically for high-reliability isolated gate driving in power conversion systems - emphasizing dV/dt immunity, timing precision, and AEC-Q100 compliance for automotive electrification and industrial automation.
FAQ
What is the isolation rating and certification status of the SI8271DBD-ASR?
The SI8271DBD-ASR provides 2.5 kVRMS withstand voltage per UL1577, certified by UL, VDE (60747-17), CSA (62368-1), and CQC (GB4943.1) for basic insulation. It meets reinforced insulation requirements for systems with ≤1500 V DC bus voltage and is AEC-Q100 qualified for automotive use. These certifications are explicitly listed in the official Skyworks datasheet revision 206327E.
Does the SI8271DBD-ASR support dual supply configurations for independent high-side and low-side driving?
No - the SI8271DBD-ASR is a single-channel driver with one VDD pin and shared VO+/VO– outputs. It is intended for driving a single switch (e.g., high-side or low-side FET). For high-side/low-side half-bridge control, Skyworks specifies the Si8273 or Si8274 variants. The SI8271DBD-ASR pinout and truth table confirm single-input (VI) operation and lack of dual VDDA/VDDB rails.
What are the exact supply voltage ranges for VDDI and VDD in the SI8271DBD-ASR?
The SI8271DBD-ASR requires VDDI = 2.5 to 5.5 V on the input side and VDD = 4.2 to 30 V on the driver side, as specified in Table 8 (Electrical Characteristics) of the Skyworks datasheet. Operation outside these ranges risks UVLO activation or permanent damage - absolute maximum ratings cap VDDI at 6.0 V and VDD at 36 V.
How does the EN pin function in the SI8271DBD-ASR, and what happens when it is pulled low?
When the EN pin of the SI8271DBD-ASR is driven low, it unconditionally forces both VO+ and VO– into a low-impedance low state regardless of VI or supply conditions - enabling hardware-level fault shutdown. This behavior is defined in Section 2.5.4 and the truth table on page 11 of the datasheet. EN has no effect if VDDI is below UVLO threshold.
Is the SI8271DBD-ASR pin-compatible with other Si827x variants such as Si8273 or Si8274?
No - the SI8271DBD-ASR uses an 8-pin SOIC package with VI/VDDI/GNDI/EN/GND/VO–/VO+/VDD pinout, while Si8273 and Si8274 use 16-pin SOIC or LGA-13 packages with dual inputs and separate VDDA/VDDB supplies. Table 4 (Family Overview) and Figures 1–3 in the datasheet confirm distinct pin counts, configurations, and incompatible footprints.
SI8271DBD-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
SI8271DBD-ASR FAQ
1.How can I place an order for SI8271DBD-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8271DBD-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 SI8271DBD-ASR reliable?
The price and inventory of SI8271DBD-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8271DBD-ASR is usually 5 days.
3.What payment methods are accepted for SI8271DBD-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8271DBD-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8271DBD-ASR?
SI8271DBD-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8271DBD-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 SI8271DBD-ASR?
For technical support, including SI8271DBD-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8271DBD-ASR requirements.
6.How does Aetrix verify that SI8271DBD-ASR is sourced from the original manufacturer or authorized distributors?
All SI8271DBD-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 SI8271DBD-ASR meets industry standards.
7.What is the process for return or replacement of SI8271DBD-ASR?
All SI8271DBD-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8271DBD-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 SI8271DBD-ASR part is unused and in its original packaging.
Return procedure for SI8271DBD-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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