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Skyworks Solutions Inc. SI8271ABD-ASR
- Part No.:
- SI8271ABD-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8271ABD-ASR.pdf
- Description:
- DGTL ISO 2.5KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,269
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Product details
Overview
SI8271ABD-ASR from Skyworks Solutions is a single-channel isolated gate driver IC designed for high-reliability MOSFET/IGBT/SiC/GaN FET control in power conversion systems. It delivers 4 A peak output current, 60 ns max propagation delay, 200 kV/µs common-mode transient immunity (CMTI), 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 half-bridge motor drives and solar inverters requiring robust isolation and precise timing.
For engineers reviewing the SI8271ABD-ASR datasheet, SI8271ABD-ASR pinout, SI8271ABD-ASR application, or SI8271ABD-ASR equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters, real-world application mappings, and two rigorously cross-checked alternative parts - all aligned to Skyworks' official Si8271 family documentation.
Technical Context
The SI8271ABD-ASR implements a single-channel RF-based isolation architecture with semiconductor die-to-die isolation barrier, supporting 2.5 kVRMS withstand voltage per UL1577. Its input side features TTL-compatible logic with >400 mV hysteresis and dedicated EN pin, while the output side integrates independent pull-high (VO+) and pull-low (VO–) drivers with UVLO monitoring on both input and driver supplies.
It uses on/off keying modulation for noise-immune signal transmission, enabling industry-leading CMTI (200 kV/µs) and latch-up immunity (400 kV/µs). The device defaults outputs to Hi-Z when VDDI is unpowered but VDD is present, and enforces safe low-state behavior during undervoltage lockout on either side.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Withstand Voltage | 2.5 kVRMS per UL1577 - enables reinforced insulation in industrial and automotive power stages |
| 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) - supports >1 MHz switching frequencies with tight timing control |
| CMTI | 200 kV/µs - prevents false triggering in noisy high-dV/dt environments like traction inverters |
| Supply Range (Input) | 2.5–5.5 V - compatible with 3.3 V and 5 V microcontrollers and FPGA I/O |
| Supply Range (Driver) | 4.2–30 V - supports gate drive for 12 V, 15 V, and 20 V logic-level FETs and IGBTs |
| Operating Temperature | –40 to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| Jitter | 200 ps p-p - ensures consistent dead-time control and minimizes timing uncertainty in PWM systems |
Pinout & Package
SI8271ABD-ASR is housed in an 8-pin SOIC package with wide creepage/clearance for reinforced isolation. Pin assignments are validated per Skyworks Si8271 datasheet Figure 1 and Table 1.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VI) | Digital control input | TTL-compatible signal controlling VO+ and VO– state; >400 mV hysteresis rejects noise |
| 2 (VDDI) | Input-side power supply | Supplies isolation transmitter and logic; 2.5–5.5 V range with UVLO monitoring |
| 3 (GNDI) | Input-side ground reference | Reference for VI, EN, and VDDI; galvanically isolated from driver-side grounds |
| 4 (EN) | Enable control input | Active-high; forces VO+ and VO– low when deasserted, independent of VI state |
| 5 (GND) | Driver-side ground | Reference for VO+, VO–, and VDD; isolated from GNDI and supports floating operation |
| 6 (VO–) | Output pull-down terminal | Sinks up to 4 A peak; complements VO+ to enable push-pull gate driving |
| 7 (VO+) | Output pull-up terminal | Sources up to 4 A peak; used with VO– for active gate control of high-side or low-side FETs |
| 8 (VDD) | Driver-side power supply | Supplies output stage; 4.2–30 V range with independent UVLO detection |
Key Features
| Feature | Design Value |
|---|---|
| Separate VO+ / VO– outputs | Enables independent slew-rate control via external gate resistors on high- and low-side paths |
| UVLO fault shutdown | Independent undervoltage lockout on VDDI and VDD prevents erratic gate drive during brownout |
| High CMTI (200 kV/µs) | Ensures reliable operation in 1500 V DC bus systems with fast-switching SiC/GaN devices |
| RF isolation technology | Eliminates LED aging and temperature drift issues inherent in optocoupled gate drivers |
| AEC-Q100 qualification | Validated for automotive applications including onboard chargers and traction inverters |
| 8-pin SOIC package | Industry-standard footprint with 8.3 mm creepage for reinforced insulation compliance |
Applications
| Motor Control Systems | Solar Power Inverters |
|---|---|
Use Scenario: Driving high-side/low-side IGBTs in 3-phase PMSM motor drives for HVAC and industrial automation. IC Role / Device Role / Timing Role: Isolated gate driver providing level-shifted, noise-immune control signals to power switches with <60 ns timing accuracy. Use Value: Enables >20 kHz PWM operation with minimal shoot-through risk due to tight propagation matching and 200 kV/µs CMTI. |
Use Scenario: Controlling SiC MOSFET half-bridges in string inverters handling up to 1500 V DC input. IC Role / Device Role / Timing Role: Single-channel isolated driver managing gate turn-on/turn-off with 4 A peak current capability. Use Value: Supports fast switching with low RDS(on) drive strength while maintaining safety isolation across high-voltage domains. |
| Onboard EV Chargers | Uninterruptible Power Supplies |
Use Scenario: Gate driving of GaN HEMTs in bidirectional AC/DC and DC/DC stages of OBC modules. IC Role / Device Role / Timing Role: Level-shifting interface between 3.3 V MCU and 12 V gate drive rails with reinforced isolation. Use Value: AEC-Q100 qualification and –40 to +125 °C operation ensure reliability in thermally constrained vehicle environments. |
Use Scenario: Driving IGBTs in double-conversion UPS inverters where EMI and transient immunity are critical. IC Role / Device Role / Timing Role: Isolated driver delivering precise timing and high noise immunity in high-noise 400 V AC output stages. Use Value: 400 kV/µs latch-up immunity prevents destructive failure during line transients and load dumps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8271AD-ASR | Same pinout and electrical specs; differs only in deglitch feature (15 ns internal filter) and slightly higher propagation delay (65 ns max). | Preferred where input signal integrity is compromised by sub-15 ns noise spikes; less suitable for ultra-low-latency timing-critical designs. | Select Si8271AD-ASR if system-level noise requires additional input filtering; otherwise SI8271ABD-ASR offers lower latency. |
| UCC5390SCD | TI part with 4 A peak output, 50 ns propagation, but lower CMTI (150 kV/µs) and no AEC-Q100 qualification. | Valid for industrial SMPS and UPS, but not certified for automotive use; lacks latch-up immunity spec. | Choose UCC5390SCD for cost-sensitive non-automotive designs needing marginally faster propagation; SI8271ABD-ASR remains preferred for automotive and high-CMTI requirements. |
Compared with Si8271AD-ASR, SI8271ABD-ASR provides 5 ns lower max propagation delay and no deglitch-induced latency - critical for high-frequency SiC systems. Against UCC5390SCD, SI8271ABD-ASR adds AEC-Q100 qualification, 50 kV/µs higher CMTI, and 400 kV/µs latch-up immunity - essential for automotive and high-reliability industrial deployments.
Availability
SI8271ABD-ASR is available at Aetrix Electronics and suitable for motor control systems, solar power inverters, onboard EV chargers, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for SI8271ABD-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, timing, and isolation technologies for high-performance power and communication systems.
The Si827x product line was engineered specifically for isolated gate driving in high-efficiency, high-reliability power conversion - targeting SiC/GaN adoption in automotive traction, renewable energy, and industrial motor drives.
FAQ
What is the maximum operating temperature for SI8271ABD-ASR?
The SI8271ABD-ASR is rated for continuous operation from –40 °C to +125 °C ambient temperature. This range is validated per AEC-Q100 stress testing and applies to all standard-orderable variants including SI8271ABD-ASR. Operation beyond +125 °C risks exceeding the 150 °C absolute maximum junction temperature limit.
Does SI8271ABD-ASR support both high-side and low-side gate driving configurations?
Yes, SI8271ABD-ASR supports both configurations via its separate VO+ and VO– outputs. When used with external gate resistors, it can actively drive either terminal of a MOSFET/IGBT - enabling direct implementation in high-side bootstrap, low-side grounded, or floating half-bridge topologies without additional level-shifting circuitry.
What isolation certifications does SI8271ABD-ASR hold?
SI8271ABD-ASR is UL recognized per UL1577 (2500 VRMS for one minute), CSA certified to 62368-1 (basic insulation), VDE certified to 60747-17 (basic insulation), and CQC approved per GB4943.1 (basic insulation). These approvals confirm suitability for reinforced insulation in industrial and automotive end-equipment.
How does the enable (EN) pin function on SI8271ABD-ASR?
The EN pin on SI8271ABD-ASR is active-high and unconditionally forces both VO+ and VO– into a low-impedance low state when pulled low - regardless of VI input state or supply conditions. Device operation resumes within tRESTART (typically <1 µs) after EN returns high, provided VDDI and VDD are above UVLO thresholds.
Is SI8271ABD-ASR pin-compatible with other Si827x variants like Si8273 or Si8274?
No, SI8271ABD-ASR is not pin-compatible with Si8273, Si8274, or Si8275. It uses an 8-pin SOIC package with VI, VDDI, GNDI, EN, GND, VO–, VO+, and VDD pin assignments. In contrast, Si8273/Si8274/Si8275 use 16-pin SOIC or LGA-13 packages with dual-channel or PWM-specific pinouts - making them physically and functionally distinct layouts.
SI8271ABD-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:
- RF 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
SI8271ABD-ASR FAQ
1.How can I place an order for SI8271ABD-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8271ABD-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 SI8271ABD-ASR reliable?
The price and inventory of SI8271ABD-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8271ABD-ASR is usually 5 days.
3.What payment methods are accepted for SI8271ABD-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8271ABD-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8271ABD-ASR?
SI8271ABD-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8271ABD-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 SI8271ABD-ASR?
For technical support, including SI8271ABD-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8271ABD-ASR requirements.
6.How does Aetrix verify that SI8271ABD-ASR is sourced from the original manufacturer or authorized distributors?
All SI8271ABD-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 SI8271ABD-ASR meets industry standards.
7.What is the process for return or replacement of SI8271ABD-ASR?
All SI8271ABD-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8271ABD-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 SI8271ABD-ASR part is unused and in its original packaging.
Return procedure for SI8271ABD-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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