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Skyworks Solutions Inc. SI8271GA-ISR
- Part No.:
- SI8271GA-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8271GA-ISR.pdf
- Description:
- DGTL ISO 1KV 1CH GATE DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,786
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Product details
Overview
SI8271GA-ISR 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 2.5–5.5 V input supply and 4.2–30 V driver supply - used in solar inverters, motor drives, and onboard chargers.
For engineers reviewing the SI8271GA-ISR datasheet, SI8271GA-ISR pinout, SI8271GA-ISR application, or SI8271GA-ISR equivalent, this page provides verified technical context, exact pin functions, real-world timing and isolation specs, automotive-grade qualification status (AEC-Q100), and validated alternative options for isolated gate drive design.
Technical Context
The SI8271GA-ISR implements RF-based silicon isolation with a proprietary semiconductor barrier, enabling 2.5 kVRMS withstand voltage per UL1577 and eliminating LED aging and temperature drift issues inherent in optocouplers. Its architecture features independent pull-up (VO+) and pull-down (VO–) outputs for precise slew rate control and integrated undervoltage lockout (UVLO) on both input (VDDI) and output (VDD) sides.
It supports TTL-compatible digital input (VI) with >400 mV hysteresis and a dedicated enable (EN) pin that forces both outputs low regardless of VI state. Output behavior defaults to Hi-Z/L during UVLO and transitions cleanly post-startup with tSTART timing, ensuring robust startup sequencing in high-voltage power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Withstand Voltage | 2.5 kVRMS (UL1577, 1 min) - enables reinforced insulation in 1000 V+ DC bus systems |
| Common-Mode Transient Immunity | 200 kV/µs - prevents false triggering in fast-switching SiC/GaN half-bridges |
| Propagation Delay | 60 ns (max) - supports >1 MHz switching frequencies with tight timing control |
| Peak Output Current | 4 A - directly drives high-gate-charge power devices without external buffers |
| Supply Voltage Range | VDDI: 2.5–5.5 V; VDD: 4.2–30 V - interfaces seamlessly with MCU I/O and wide-range gate supplies |
| Operating Temperature | –40 to +125 °C - qualified for industrial and automotive under-hood applications |
| Jitter | 200 ps p-p - ensures consistent dead-time integrity in PWM-controlled topologies |
Pinout & Package
SI8271GA-ISR is housed in an 8-pin SOIC package with gull-wing leads, creepage/clearance optimized for reinforced isolation. Pin assignments are validated per Skyworks datasheet Figure 1 and Table 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VI | Digital control input | TTL-compatible signal driving gate output state; >400 mV hysteresis rejects noise |
| 2 - VDDI | Input-side power supply | 2.5–5.5 V supply for logic and isolation transmitter; powers internal UVLO monitor |
| 3 - GNDI | Input-side ground reference | Isolated return for VI and VDDI; must be separated from driver-side ground by ≥8 mm |
| 4 - EN | Enable control input | Active-high; forces VO+ and VO– low when deasserted - critical for fault-safe shutdown |
| 5 - GND | Driver-side ground | Return path for VO– and VDD; electrically isolated from GNDI; connects to power device source |
| 6 - VO– | Pull-down output terminal | Drives gate low with 1.0 Ω typical ROL; sinks up to 4 A peak for fast turn-off |
| 7 - VO+ | Pull-up output terminal | Drives gate high with 2.7 Ω typical ROH; sources up to 4 A peak for fast turn-on |
| 8 - VDD | Driver-side power supply | 4.2–30 V supply for output stage; powers UVLO monitor for driver side; referenced to GND |
Key Features
| Feature | Design Value |
|---|---|
| Separate VO+ / VO– outputs | Enables independent optimization of turn-on/turn-off slew rates via external gate resistors |
| 200 kV/µs CMTI | Prevents misfiring in 1500 V DC bus inverters with dV/dt > 50 kV/µs at switching nodes |
| Dedicated EN pin | Guarantees simultaneous forced low-state on both outputs - eliminates shoot-through risk during faults |
| AEC-Q100 Qualified | Validated for automotive applications including traction inverters and onboard chargers (Grade 1) |
| Silicon RF isolation | Eliminates LED degradation; achieves <10 ppm FIT failure rate and stable timing over 15+ years |
Applications
| Solar Power Inverter | Motor Control Drive |
|---|---|
Use Scenario: Half-bridge switching in string inverters with 1000 V DC input and SiC MOSFETs. IC Role / Device Role / Timing Role: Isolated gate driver providing level-shifted, noise-immune control of high-side and low-side switches. Use Value: 200 kV/µs CMTI prevents false turn-on during rapid bus transients; 60 ns delay enables precise 100 kHz+ PWM control. |
Use Scenario: Field-oriented control (FOC) of PMSM motors in HVAC compressors and EV traction systems. IC Role / Device Role / Timing Role: Single-channel driver controlling high-side IGBTs in three-phase inverter legs. Use Value: 4 A peak output drives 1200 V/100 A IGBTs directly; AEC-Q100 qualification ensures reliability in 125 °C ambient. |
| Onboard Charger (OBC) | Uninterruptible Power Supply (UPS) |
Use Scenario: AC/DC + DC/DC stages in bidirectional OBCs for BEVs, operating at 800 V battery voltage. IC Role / Device Role / Timing Role: Isolated gate driver for GaN HEMTs in totem-pole PFC and isolated LLC resonant converters. Use Value: 2.5 kVRMS isolation meets reinforced insulation requirements for 800 V systems; 200 ps jitter maintains ZVS timing accuracy. |
Use Scenario: High-efficiency double-conversion UPS with 400 V DC bus and IGBT-based inverter stage. IC Role / Device Role / Timing Role: Gate driver for high-side IGBTs in three-phase inverter bridge with active short-circuit protection. Use Value: EN pin enables immediate gate discharge during overload; UVLO on VDD prevents erratic switching during brownouts. |
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-ISR | Same pinout and specs, but rated for –55 to +125 °C (ZS suffix); higher temp range and tighter parametric spread | Required for extended-temperature automotive traction inverters and military-grade power supplies | Select when operation below –40 °C or tighter timing stability over temperature is mandatory |
| UCC5390SCD | TI part with 10 A peak output, 40 ns propagation delay, and integrated Miller clamp; requires external isolation capacitor | Better suited for ultra-fast SiC designs needing >5 A drive and active Miller clamping | Choose only if higher peak current and built-in Miller clamp justify added BOM cost and layout complexity |
Compared with SI8271GA-ISR, Si8271GB-ISR offers extended temperature capability without layout change, while UCC5390SCD trades isolation integration for higher drive strength and advanced protection - making SI8271GA-ISR optimal for cost-sensitive, high-CMTI industrial inverters where 4 A drive suffices.
Availability
SI8271GA-ISR is available at Aetrix Electronics and suitable for solar power inverters, motor control drives, and onboard chargers requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI8271GA-ISR 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 communications systems.
The Si827x family was engineered specifically for isolated gate driving in next-generation power conversion - prioritizing CMTI resilience, timing precision, and AEC-Q100 compliance for SiC/GaN-based EV, renewable energy, and industrial motor systems.
FAQ
What is the isolation rating and safety certification status of the SI8271GA-ISR?
The SI8271GA-ISR is UL recognized per UL1577 with 2.5 kVRMS withstand voltage (1 minute), and carries VDE 60747-17, CSA 62368-1, and CQC GB4943.1 certifications for basic insulation. It meets reinforced insulation requirements for systems up to 1000 V DC bus voltage and is AEC-Q100 Grade 1 qualified for automotive use.
Does the SI8271GA-ISR support both high-side and low-side gate driving configurations?
Yes - the SI8271GA-ISR's separate VO+ and VO– outputs allow flexible configuration: VO+ can drive a high-side switch (e.g., N-channel MOSFET in a half-bridge upper leg) while VO– drives a low-side switch, or both outputs can control a single switch with independent turn-on/turn-off resistors. Its 30 V VDD rating supports high-side bootstrap or isolated supply topologies.
How does the enable (EN) pin function in the SI8271GA-ISR, and what happens when it is asserted low?
When EN is driven low, the SI8271GA-ISR unconditionally forces both VO+ and VO– outputs into a low-impedance low state within tSD (shutdown time), overriding VI input state. This feature enables safe, synchronized shutdown during overcurrent or thermal faults. EN has no effect if VDDI is below its UVLO threshold.
What are the key differences between SI8271GA-ISR and SI8271GB-ISR?
The SI8271GB-ISR shares identical pinout, electrical specs, and functionality with SI8271GA-ISR but is rated for –55 to +125 °C operation (ZS suffix) and undergoes extended temperature screening. It also exhibits tighter propagation delay and jitter specifications across temperature, making it preferred for aerospace, defense, and extreme automotive under-hood applications.
Can the SI8271GA-ISR drive SiC or GaN FETs directly, and what gate resistor guidance applies?
Yes - the SI8271GA-ISR's 4 A peak output current and low ROH/ROL (2.7 Ω / 1.0 Ω) enable direct drive of medium-power SiC MOSFETs (e.g., 650 V/40 mΩ) and GaN HEMTs. For optimal EMI and oscillation control, use asymmetric gate resistors: 2.2 Ω in series with VO+ and 4.7 Ω with VO–, verified per Skyworks AN1339 layout guidelines.
SI8271GA-ISR 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:
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
- Approval Agency:
- CQC, CSA, UL, VDE
SI8271GA-ISR FAQ
1.How can I place an order for SI8271GA-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8271GA-ISR 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-ISR reliable?
The price and inventory of SI8271GA-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8271GA-ISR is usually 5 days.
3.What payment methods are accepted for SI8271GA-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8271GA-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8271GA-ISR?
SI8271GA-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8271GA-ISR 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-ISR?
For technical support, including SI8271GA-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8271GA-ISR requirements.
6.How does Aetrix verify that SI8271GA-ISR is sourced from the original manufacturer or authorized distributors?
All SI8271GA-ISR 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-ISR meets industry standards.
7.What is the process for return or replacement of SI8271GA-ISR?
All SI8271GA-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8271GA-ISR, 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-ISR part is unused and in its original packaging.
Return procedure for SI8271GA-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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