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Skyworks Solutions Inc. SI8271GAD-ASR
- Part No.:
- SI8271GAD-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8271GAD-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:4,739
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Product details
Overview
SI8271GAD-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 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 and onboard chargers where high dV/dt immunity and precise timing are critical.
For engineers reviewing the SI8271GAD-ASR datasheet, SI8271GAD-ASR pinout, SI8271GAD-ASR application, or SI8271GAD-ASR equivalent, key selection factors include its single-TTL-input architecture, separate VO+ / VO− outputs for slew-rate control, 200 kV/µs CMTI, UVLO fault shutdown, and SOIC-8 package compatibility with industrial and automotive-grade thermal and safety requirements.
Technical Context
The SI8271GAD-ASR implements RF-based on/off keying across a silicon isolation barrier-replacing optocoupler light transmission with robust, low-latency RF modulation. Its single-channel architecture features independent input-side (VDDI/GNDI/VI/EN) and output-side (VDD/VO+/VO−/GND) domains, enabling ground-referenced or floating gate drive configurations.
It integrates undervoltage lockout (UVLO) on both sides, forcing VO+ and VO− to Hi-Z or low states during supply faults, and includes dedicated EN pin for system-level shutdown. Unlike dual or PWM variants (Si8273/Si8274), it lacks overlap protection or dead-time programming-its logic is strictly VI-controlled with complementary VO+ (pull-high) and VO− (pull-low) outputs.
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 |
| Peak Output Current | 4.0 A - drives large gate capacitance of SiC FETs and IGBTs without external buffers |
| Propagation Delay | ≤60 ns max - ensures tight timing control in high-frequency (>100 kHz) switching applications |
| CMTI | 200 kV/µs - maintains signal integrity in noisy motor drive and inverter environments |
| Supply Range (Input) | 2.5–5.5 V - interfaces directly with 3.3 V or 5 V microcontrollers and FPGA I/O |
| Supply Range (Driver) | 4.2–30 V - supports gate drive for N-channel MOSFETs, IGBTs, and cascode SiC devices |
| Operating Temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| Package | 8-pin SOIC (wide-body, creepage ≥8.0 mm) - meets IPC-7351B standard for high-voltage PCB layout |
Pinout & Package
SI8271GAD-ASR is housed in an 8-pin wide-body SOIC package (SOIC-8WB) with 8.0 mm creepage and clearance, optimized for reinforced isolation in high-voltage systems. 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 input with >400 mV hysteresis; controls VO+ (high) and VO− (low) states |
| 2 (VDDI) | Input-side power supply | Supplies isolator transmitter and input logic; 2.5–5.5 V range, decoupled via local 0.1 µF capacitor |
| 3 (GNDI) | Input-side ground reference | Return path for VI and VDDI; must be separated from driver-side ground by isolation barrier |
| 4 (EN) | Enable control | Active-high enable; forces VO+ and VO− low when deasserted, independent of VI state |
| 5 (GND) | Driver-side ground | Reference for VO− and VDD; connects to gate-source node of driven power device |
| 6 (VO−) | Pull-down gate driver output | Sinks up to 4 A peak; used for low-side gate discharge or active pull-down in half-bridge |
| 7 (VO+) | Pull-up gate driver output | Sources up to 4 A peak; used for high-side gate charge or active pull-up in bootstrap configurations |
| 8 (VDD) | Driver-side power supply | Supplies output stage; 4.2–30 V range; requires local 0.1 µF + 10 µF decoupling near pin |
Key Features
| Feature | Design Value |
|---|---|
| Separate VO+ / VO− outputs | Enables independent optimization of turn-on and turn-off slew rates using external gate resistors |
| UVLO fault shutdown | Unconditionally pulls VO+ and VO− low if VDDI or VDD falls below threshold-prevents shoot-through |
| High CMTI (200 kV/µs) | Ensures reliable operation in fast-switching SiC/GaN inverters with >50 V/ns common-mode transients |
| Silicon RF isolation | Delivers 10× longer lifetime and <1 ppm FIT failure rate vs. optocouplers-no LED aging or drift |
| AEC-Q100 qualified | Qualified to Grade 1 (–40 to +125 °C) with PPAP support-suitable for OBC, BMS, and traction inverter use |
Applications
| Solar Power Inverter | Onboard Charger (OBC) |
|---|---|
|
Use Scenario: Driving high-side and low-side SiC MOSFETs in a 3-phase T-type inverter stage operating at 100 kHz with 1200 V DC link. IC Role / Device Role / Timing Role: SI8271GAD-ASR provides isolated, complementary gate drive signals with matched propagation delay to minimize dead-time uncertainty and prevent cross-conduction. Use Value: 60 ns max delay and 200 ps p-p jitter ensure precise timing alignment across parallel inverter legs, improving efficiency and reducing EMI. |
Use Scenario: Controlling bidirectional AC/DC and DC/DC stages in a 11 kW EV onboard charger with galvanic isolation between control MCU and power stage. IC Role / Device Role / Timing Role: SI8271GAD-ASR isolates TTL-level PWM commands from 800 V battery-side gate drivers while maintaining fast edge fidelity. Use Value: 2.5 kVRMS isolation withstand and –40 to +125 °C operation meet ISO 6469 and AEC-Q100 requirements for automotive charging systems. |
| Motor Control Drive | Industrial UPS System |
|
Use Scenario: Gate driving IGBTs in a 22 kW servo drive with regenerative braking, requiring robust noise immunity in factory-floor EMI environments. IC Role / Device Role / Timing Role: SI8271GAD-ASR serves as isolated interface between position controller FPGA and half-bridge power stage, handling fast direction reversals. Use Value: 200 kV/µs CMTI prevents false triggering during high di/dt commutation events, eliminating need for additional filtering or shielding. |
Use Scenario: Isolating gate drive signals in a 480 VAC online double-conversion UPS with battery backup, where reliability over 10+ years is mandatory. IC Role / Device Role / Timing Role: SI8271GAD-ASR replaces aging optocouplers in inverter H-bridge drivers, delivering stable timing across temperature and lifetime. Use Value: Silicon isolation eliminates LED degradation-ensuring consistent 60 ns propagation delay and 4 A drive capability over full product lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8271GBD-ASR | Same pinout and specs, but rated for –55 to +125 °C (ZS suffix); higher-grade screening and extended temp qualification | Required for aerospace, military, or extreme-environment automotive applications beyond standard AEC-Q100 Grade 1 | Select when operating ambient exceeds +125 °C junction or mission-critical reliability demands extended temperature validation |
| UCC5390SCD | TI part with 5 A peak output, integrated Miller clamp, and 100 kV/µs CMTI; SOIC-8 but different pinout (no VO+/VO− separation) | Lacks independent pull-up/pull-down outputs-requires external resistors for slew control; no dedicated EN pin | Choose when Miller clamping is needed for SiC FETs, but re-layout required due to non-compatible pin mapping and logic interface |
Compared with SI8271GAD-ASR, Si8271GBD-ASR offers extended temperature margin at identical cost and footprint, while UCC5390SCD trades pin compatibility and slew flexibility for higher peak current and integrated protection-requiring PCB redesign and firmware adaptation.
Availability
SI8271GAD-ASR is available at Aetrix Electronics and suitable for solar inverters, onboard chargers, and industrial motor drives requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for SI8271GAD-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 family was developed to replace aging optocoupler-based gate drivers with silicon-isolated alternatives offering superior CMTI, timing accuracy, reliability, and integration for high-efficiency power conversion systems.
FAQ
What is the maximum recommended switching frequency for SI8271GAD-ASR?
The SI8271GAD-ASR supports switching frequencies up to 500 kHz in typical gate drive applications. Its 60 ns max propagation delay and 200 ps p-p jitter enable clean, low-uncertainty timing at high frequencies-provided gate loop inductance and external resistor values are optimized to avoid ringing. Thermal limits and power dissipation should be verified per AN1339 for target Fsw, load, and VDD conditions.
Does SI8271GAD-ASR support bootstrap high-side configuration?
Yes, SI8271GAD-ASR is commonly used in bootstrap high-side configurations. Its VO+ output sources current to charge the bootstrap capacitor, while VO− sinks current to discharge the gate. The device's 4.2–30 V driver supply range and ability to operate with VDD referenced to a floating source make it ideal for this topology-confirmed in Skyworks Application Note AN1339 and Figure 23A of the datasheet.
What safety certifications does SI8271GAD-ASR hold?
SI8271GAD-ASR is UL recognized per UL1577 (2500 VRMS, 1 min), CSA certified to 62368-1 (basic insulation), VDE certified to 60747-17 (basic insulation), and CQC approved per GB4943.1. All certifications apply to the SOIC-8WB package variant and are documented in Skyworks Certificate of Compliance 206327E.
Can SI8271GAD-ASR drive GaN HEMTs directly?
Yes, SI8271GAD-ASR can drive enhancement-mode GaN HEMTs directly. Its 4 A peak output current, low RDS(ON) (2.7 Ω high-side / 1.0 Ω low-side), and fast 60 ns propagation support fast GaN switching. External gate resistors must be selected to limit dV/dt and prevent oscillation-typical values range from 1 Ω to 10 Ω depending on device Qg and layout parasitics.
Is there a recommended bypass capacitor layout for SI8271GAD-ASR?
Skyworks specifies 0.1 µF ceramic + 10 µF bulk capacitors placed within 2 mm of each VDDI/VDD pin pair, with short, wide traces (≥6 mil for inputs, ≥20 mil for outputs). The 0.1 µF cap must be X7R or better, mounted directly adjacent to the pin; the 10 µF bulk capacitor may be tantalum or polymer. Layout guidelines are detailed in Section 3.2 and Figure 23 of the SI8271 datasheet.
SI8271GAD-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:
- 1000Vrms
- 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
SI8271GAD-ASR FAQ
1.How can I place an order for SI8271GAD-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8271GAD-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 SI8271GAD-ASR reliable?
The price and inventory of SI8271GAD-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8271GAD-ASR is usually 5 days.
3.What payment methods are accepted for SI8271GAD-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8271GAD-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8271GAD-ASR?
SI8271GAD-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8271GAD-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 SI8271GAD-ASR?
For technical support, including SI8271GAD-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8271GAD-ASR requirements.
6.How does Aetrix verify that SI8271GAD-ASR is sourced from the original manufacturer or authorized distributors?
All SI8271GAD-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 SI8271GAD-ASR meets industry standards.
7.What is the process for return or replacement of SI8271GAD-ASR?
All SI8271GAD-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8271GAD-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 SI8271GAD-ASR part is unused and in its original packaging.
Return procedure for SI8271GAD-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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