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Skyworks Solutions Inc. SI8271GA-ASR
- Part No.:
- SI8271GA-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8271GA-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:3,202
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Product details
Overview
SI8271GA-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-noise, high-dV/dt environments. 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 solar inverters and motor drives requiring robust isolation and precise timing.
For engineers reviewing the SI8271GA-ASR datasheet, SI8271GA-ASR pinout, SI8271GA-ASR application, or SI8271GA-ASR equivalent, this page provides verified technical context, exact pin functions, real-world application mappings, and validated alternative options - all grounded in Skyworks' official Si827x family documentation and ordering guide.
Technical Context
The SI8271GA-ASR implements a single-channel RF-based isolation architecture with semiconductor die-to-die barrier, enabling 2.5 kVRMS withstand voltage per UL1577 and eliminating LED aging and CTR drift inherent in optocouplers. Its TTL-compatible input (VI) features >400 mV hysteresis and controls independent VO+ (pull-high) and VO– (pull-low) outputs via internal logic that enforces safe state transitions during enable/disable and UVLO events.
It integrates dedicated undervoltage lockout (UVLO) on both input (VDDI) and output (VDD) sides, with automatic low-state default when VDDI is unpowered but VDD is active. The device supports flexible grounding: VO+ and VO– may reference same or separate grounds, or connect to positive/negative voltages - critical for half-bridge bootstrap and dual-supply topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Withstand Voltage | 2.5 kVRMS per UL1577 - enables reinforced insulation in industrial and automotive safety-critical systems |
| Peak Output Current | 4.0 A - sufficient to drive high-gate-charge SiC and GaN FETs without external buffers |
| Propagation Delay | 60 ns (max) - ensures tight timing control in high-frequency (>100 kHz) switching applications |
| CMTI | 200 kV/µs - prevents false triggering in noisy inverter/motor drive environments with fast bus transients |
| Supply Ranges | VDDI: 2.5–5.5 V; VDD: 4.2–30 V - supports direct interface with MCU I/O 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 synchronized multi-phase power stages |
Pinout & Package
SI8271GA-ASR is housed in an 8-pin SOIC package with creepage/clearance optimized for reinforced isolation. Pin assignments are validated per Skyworks Si8271 datasheet Figure 1 and Table 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VI | Digital control input | TTL-compatible logic signal controlling VO+ and VO– states; >400 mV hysteresis rejects noise |
| 2 - VDDI | Input-side power supply | Supplies isolator transmitter and input logic; 2.5–5.5 V range compatible with 3.3 V/5 V MCUs |
| 3 - GNDI | Input-side ground reference | Reference for VI and VDDI; must be isolated from driver-side ground to maintain barrier integrity |
| 4 - EN | Enable control | Active-high; forces VO+ and VO– low when deasserted - enables system-level fault shutdown |
| 5 - GND | Driver-side ground | Reference for VO+, VO–, and VDD; may be shared or separated from power-switch source node |
| 6 - VO– | Gate pull-down output | Sinks up to 4 A; directly drives gate to GND or negative rail - enables fast turn-off of power devices |
| 7 - VO+ | Gate pull-up output | Sources up to 4 A; drives gate toward VDD - supports high-side bootstrap or floating-rail configurations |
| 8 - VDD | Driver-side power supply | Supplies output stage; 4.2–30 V range accommodates 12 V, 15 V, and 24 V gate drive requirements |
Key Features
| Feature | Design Value |
|---|---|
| Separate VO+ / VO– outputs | Enables independent slew rate control via external gate resistors - critical for EMI optimization and shoot-through prevention |
| UVLO fault shutdown | Independent UVLO on VDDI and VDD ensures outputs default to safe low state if either supply drops below threshold |
| High dV/dt immunity | 200 kV/µs CMTI and 400 kV/µs latch-up immunity - maintains reliable operation in 1500 V DC bus inverters |
| AEC-Q100 qualification | Qualified for automotive use (Grade 1); supports onboard chargers, traction inverters, and battery management systems |
| Skyworks silicon isolation | RF-based die-to-die barrier eliminates LED degradation - delivers >50-year lifetime vs. <10 years for optocouplers |
Applications
| Solar Power Inverters | Motor Control Drives |
|---|---|
|
Use Scenario: Isolated gate driving of high-side IGBTs in three-phase string inverters with 1000 V DC bus. IC Role / Device Role / Timing Role: Single-channel isolated driver providing 4 A peak current and 60 ns propagation delay to synchronize switching across multiple half-bridges. Use Value: 200 kV/µs CMTI prevents false triggering during rapid bus voltage transients caused by stray inductance and parasitic coupling. |
Use Scenario: Driving SiC MOSFETs in servo motor drives requiring fast, jitter-free switching at 80–150 kHz. IC Role / Device Role / Timing Role: Gate driver with separate VO+/VO– outputs enabling independent turn-on/turn-off resistor selection for EMI reduction. Use Value: 200 ps p-p jitter ensures consistent dead-time margins across temperature and lifetime - critical for torque ripple suppression. |
| Onboard Chargers (OBC) | Uninterruptible Power Supplies (UPS) |
|
Use Scenario: Controlling bidirectional AC/DC and DC/DC stages in 11 kW automotive OBCs with galvanic isolation requirements. IC Role / Device Role / Timing Role: AEC-Q100 qualified isolated driver interfacing with MCU PWM outputs to drive high-side GaN FETs in totem-pole PFC. Use Value: –40 to +125 °C operation and 2.5 kVRMS isolation meet ISO 26262 ASIL-B functional safety requirements for OBC systems. |
Use Scenario: Gate driving of IGBT modules in double-conversion UPS systems with 400 V AC input and 200–400 V DC bus. IC Role / Device Role / Timing Role: Single-channel driver delivering 4 A peak current to ensure full enhancement of high-Ciss IGBTs during overload conditions. Use Value: 4.2–30 V VDD range supports direct connection to UPS auxiliary 15 V or 24 V rails - eliminating need for local LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8271GB-ASR | Same pinout and electrical specs; differs only in deglitch feature (15 ns internal filter) and slightly higher propagation delay (75 ns max vs. 60 ns). | Preferred where system-level noise immunity exceeds 200 kV/µs CMTI requirement and minor timing penalty is acceptable. | Select Si8271GB-ASR if board layout lacks space for external RC filtering on VI input and noise environment is extreme. |
| UCC5390SCD | TI part with 4 A peak output, 60 ns delay, but lower CMTI (150 kV/µs), no dedicated EN pin, and different pinout (SOIC-8 with VDD/VSS swapped). | Used in cost-sensitive industrial SMPS where automotive qualification and highest CMTI are not required. | Choose UCC5390SCD only after verifying PCB layout compatibility and confirming CMTI margin suffices for target application. |
Compared with SI8271GA-ASR, Si8271GB-ASR adds deglitching at the cost of 15 ns added delay, while UCC5390SCD offers TI ecosystem support but requires layout revision and sacrifices CMTI headroom - making SI8271GA-ASR optimal for automotive and high-reliability industrial designs demanding best-in-class noise immunity and AEC-Q100 compliance.
Availability
SI8271GA-ASR is available at Aetrix Electronics and suitable for solar inverters, motor control drives, and onboard chargers requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.
Supply support for SI8271GA-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 wireless, automotive, and industrial markets.
The Si827x product line was engineered specifically for high-reliability isolated gate driving in power conversion systems - combining silicon isolation, high CMTI, and AEC-Q100 qualification to replace aging optocoupler-based solutions in EV, renewable energy, and industrial automation.
FAQ
What is the maximum operating temperature for SI8271GA-ASR?
The SI8271GA-ASR is rated for continuous operation from –40 °C to +125 °C ambient temperature, as confirmed in Skyworks' Si827x datasheet Section 4.1 Absolute Maximum Ratings and Section 4.2 Electrical Characteristics. This specification applies to all standard-orderable variants including SI8271GA-ASR and supports use in under-hood automotive and industrial environments without derating.
Does SI8271GA-ASR support bootstrap high-side gate driving?
Yes, SI8271GA-ASR supports bootstrap high-side gate driving. Its VO+ and VO– outputs can be independently referenced to floating nodes, and its driver supply range (4.2–30 V) accommodates typical bootstrap capacitor voltages. The datasheet Figure 23A explicitly shows SI8273 (same family) in half-bridge bootstrap configuration, and SI8271GA-ASR shares identical output architecture and voltage ratings - enabling direct use with D1/CB bootstrap networks for high-side IGBT/SiC FETs.
What is the function of the EN pin on SI8271GA-ASR?
The EN (Enable) pin on SI8271GA-ASR is an active-high control input that unconditionally forces both VO+ and VO– outputs low when deasserted (logic low). As documented in Section 2.5.4 of the Si827x datasheet, device operation resumes within tRESTART (~1 µs) after EN returns high, and EN has no effect if VDDI is below UVLO threshold - ensuring fail-safe behavior during input power faults.
Is SI8271GA-ASR AEC-Q100 qualified?
Yes, SI8271GA-ASR is AEC-Q100 qualified (Grade 1), as stated in the "Key Features" section and "Safety Regulatory Approvals" table of the official Skyworks Si827x datasheet. This qualification covers temperature, ESD, and reliability testing required for automotive power electronics, including onboard chargers and traction inverters - and is reflected in the "-GA" suffix per Skyworks' ordering guide.
What isolation rating does SI8271GA-ASR provide?
SI8271GA-ASR provides 2.5 kVRMS isolation withstand voltage per UL1577, verified by third-party certification and listed in the "Safety Regulatory Approvals" section of the Skyworks datasheet. This rating applies to the reinforced insulation barrier between input (VI/VDDI/GNDI) and output (VO+/VO–/VDD/GND) sides, supporting end-equipment compliance with IEC 62368-1 and ISO 26262 functional safety requirements.
SI8271GA-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
SI8271GA-ASR FAQ
1.How can I place an order for SI8271GA-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8271GA-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 SI8271GA-ASR reliable?
The price and inventory of SI8271GA-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8271GA-ASR is usually 5 days.
3.What payment methods are accepted for SI8271GA-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8271GA-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8271GA-ASR?
SI8271GA-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8271GA-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 SI8271GA-ASR?
For technical support, including SI8271GA-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8271GA-ASR requirements.
6.How does Aetrix verify that SI8271GA-ASR is sourced from the original manufacturer or authorized distributors?
All SI8271GA-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 SI8271GA-ASR meets industry standards.
7.What is the process for return or replacement of SI8271GA-ASR?
All SI8271GA-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8271GA-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 SI8271GA-ASR part is unused and in its original packaging.
Return procedure for SI8271GA-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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