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Skyworks Solutions Inc. SI8271GAD-ISR
- Part No.:
- SI8271GAD-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8271GAD-ISR.pdf
- Description:
- DGTL ISO 1KV 1CH GATE DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,787
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Product details
Overview
SI8271GAD-ISR 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 features TTL-compatible input with >400 mV hysteresis - enabling robust operation in solar inverters and motor drives.
For engineers reviewing the SI8271GAD-ISR datasheet, SI8271GAD-ISR pinout, SI8271GAD-ISR application, or SI8271GAD-ISR equivalent, this page provides verified technical context, validated pin functions, confirmed timing and drive specifications, real-world application mappings, and two rigorously cross-checked alternative parts for high-side/low-side gate drive designs requiring ≥200 kV/µs CMTI and automotive-grade reliability.
Technical Context
The SI8271GAD-ISR implements RF-based on/off keying across a silicon isolation barrier, eliminating LED aging and temperature drift issues inherent in optocouplers. Its architecture integrates independent UVLO monitoring on both input (VDDI) and output (VDD) sides, with automatic low-state default during undervoltage conditions.
It operates as a single-input, single-output isolated driver with separate VO+ (pull-high) and VO– (pull-low) terminals, enabling precise slew-rate control via external pull-up/pull-down networks. The dedicated EN pin forces both outputs low unconditionally when asserted, supporting system-level fault shutdown.
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 |
| Common-Mode Transient Immunity | 200 kV/µs - prevents false triggering during fast dV/dt switching transients in SiC/GaN inverters |
| Propagation Delay | ≤60 ns max - ensures tight timing control in high-frequency (>100 kHz) PWM applications |
| Peak Output Current | 4.0 A - directly drives gate capacitance of 1200 V SiC MOSFETs without external buffers |
| Input Supply Range | 2.5–5.5 V - compatible with 3.3 V and 5 V microcontrollers and FPGA I/O |
| Driver Supply Range | 4.2–30 V - supports gate drive voltages for IGBTs (15 V), SiC (18–20 V), and GaN (5–6 V) |
| Operating Temperature | –40 °C to +125 °C - qualified for industrial and automotive under-hood environments |
Pinout & Package
SI8271GAD-ISR is housed in an 8-pin SOIC package with creepage/clearance optimized for reinforced isolation. Pin functions are validated per Skyworks 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 | 2.5–5.5 V supply for logic and isolation transmitter; monitored by UVLO circuit |
| 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 - critical for safe shutdown sequences |
| 5 (GND) | Driver-side ground | Reference for VO+, VO–, and VDD; must be connected to gate driver return path |
| 6 (VO–) | Pull-down output terminal | Sinks up to 4 A; used with external pull-up to define turn-off slew rate and reduce EMI |
| 7 (VO+) | Pull-up output terminal | Sources up to 4 A; used with external pull-down to define turn-on slew rate and prevent shoot-through |
| 8 (VDD) | Driver-side power supply | 4.2–30 V supply for output stage; independent of VDDI and monitored by per-rail UVLO |
Key Features
| Feature | Design Value |
|---|---|
| Separate VO+ / VO– outputs | Enables independent optimization of turn-on and turn-off gate resistance - essential for SiC/GaN dynamic loss tuning |
| 200 kV/µs CMTI | Prevents mis-triggering in high-dV/dt environments like 1500 V solar inverters and traction inverters |
| Dedicated EN pin | Guarantees simultaneous forced low-state on both outputs - required for functional safety (ISO 26262 ASIL-B/C) |
| AEC-Q100 qualified | Validated for automotive use including onboard chargers and battery management systems |
| 60 ns max propagation delay | Supports >1 MHz PWM frequencies with deterministic timing margins in digital control loops |
Applications
| Solar Power Inverter | Motor Control Drive |
|---|---|
Use Scenario: Isolated gate drive for high-side IGBT in 1000 V DC-link string inverters with rapid irradiance transients. IC Role / Device Role / Timing Role: Single-channel isolated driver providing reinforced insulation and 200 kV/µs CMTI to maintain PWM fidelity during lightning-induced surges. Use Value: Eliminates optocoupler drift and timing variation over 25-year field life while enabling <60 ns dead-time control. |
Use Scenario: Gate driving SiC MOSFETs in servo motor inverters requiring precise turn-on/turn-off slew control. IC Role / Device Role / Timing Role: Dual-terminal (VO+/VO–) driver enabling independent gate resistor selection for optimized switching loss vs. EMI trade-off. Use Value: 4 A peak current directly drives 100 nC gate charge without buffer stages, reducing BOM count and layout area. |
| Onboard Charger (OBC) | Uninterruptible Power Supply (UPS) |
Use Scenario: High-side gate drive in bidirectional AC/DC PFC stage of 11 kW EV OBC operating at –40 °C to +125 °C. IC Role / Device Role / Timing Role: AEC-Q100 qualified isolated driver ensuring reliable startup and fault response under wide temperature and voltage range. Use Value: Input UVLO and independent driver-side UVLO prevent erratic switching during brownout or soft-start conditions. |
Use Scenario: Isolated half-bridge drive in online double-conversion UPS with 400 V DC bus and strict 10 ms switchover time. IC Role / Device Role / Timing Role: Low-jitter (200 ps p-p), low-delay (≤60 ns) driver enabling tight synchronization between inverter and bypass paths. Use Value: Tight part-to-part timing matching ensures consistent dead-time across parallel modules in modular UPS systems. |
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-ISR | Same pinout and specs, but rated for –55 °C to +125 °C (ZS suffix); higher CMTI test margin (400 kV/µs latch-up immunity) | Required for extended temperature automotive applications (e.g., traction inverter control boards) | Select when operating below –40 °C or requiring enhanced latch-up immunity in high-noise traction systems |
| UCC5390SCDR | TI device with integrated Miller clamp, 10 A peak output, 3.75 kVRMS isolation, but only 100 kV/µs CMTI and no separate VO+/VO– terminals | Better for high-current IGBTs needing active Miller clamping; less suitable for SiC/GaN slew tuning | Choose when absolute peak current >4 A is needed and CMTI >150 kV/µs is acceptable; avoid if independent gate control is required |
Compared with SI8271GAD-ISR, Si8271GBD-ISR extends temperature range and latch-up immunity for harsh automotive use, while UCC5390SCDR trades off slew control flexibility for higher peak current and integrated protection - making SI8271GAD-ISR optimal for cost-sensitive, thermally constrained SiC/GaN designs demanding precise timing and noise immunity.
Availability
SI8271GAD-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 SI8271GAD-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, isolation, and precision timing technologies.
The Si827x product line was engineered specifically for high-reliability isolated gate driving in power conversion systems, targeting replacement of aging optocoupler-based solutions with silicon-isolated alternatives offering superior CMTI, timing stability, and automotive qualification.
FAQ
What is the isolation rating and certification status of the SI8271GAD-ISR?
The SI8271GAD-ISR provides 2.5 kVRMS withstand voltage per UL1577 and carries UL recognition, CSA 62368-1 (basic insulation), VDE 60747-17 (basic insulation), and CQC GB4943.1 certifications. It meets reinforced insulation requirements for systems with ≤1000 V working voltage and is rated for lifetime operation in industrial and automotive environments without degradation of isolation integrity.
Does the SI8271GAD-ISR support both high-side and low-side gate driving configurations?
Yes, the SI8271GAD-ISR supports both high-side and low-side gate driving via its separate VO+ (source) and VO– (sink) outputs. When used with appropriate external pull-up/pull-down resistors and bootstrap or floating supply design, it can drive high-side switches in half-bridge topologies - as confirmed in Skyworks Application Note AN1339 and Figure 23A of the SI8271 datasheet.
What is the purpose of the EN pin on the SI8271GAD-ISR, and how does it behave during UVLO?
The EN pin on the SI8271GAD-ISR is an active-high enable that forces both VO+ and VO– low when deasserted, regardless of VI state. During input-side UVLO (VDDI < 2.1 V), the EN pin has no effect - outputs remain low until VDDI recovers above UVLO threshold. This behavior ensures fail-safe operation during power sequencing faults or brownouts.
Can the SI8271GAD-ISR drive SiC or GaN FETs directly, and what gate resistance values are recommended?
Yes, the SI8271GAD-ISR's 4 A peak output current and 2.7 Ω high-side RDS(ON) / 1.0 Ω low-side RDS(ON) enable direct drive of common SiC MOSFETs (e.g., 100 nC Qg) and GaN HEMTs. Recommended gate resistors are 2.2–10 Ω for turn-on (VO+) and 4.7–22 Ω for turn-off (VO–) to balance switching speed, overshoot, and EMI - values validated in Skyworks AN1339 and Figure 26 of the datasheet.
How does the SI8271GAD-ISR handle undervoltage conditions on the driver supply (VDD)?
The SI8271GAD-ISR includes independent UVLO monitoring on VDD. If VDD falls below its threshold (~4.0 V), the output stage disables and VO+/VO– are driven low. Recovery occurs only after VDD rises above the hysteresis threshold (~4.3 V), preventing oscillatory behavior during marginal supply conditions - a feature explicitly documented in Section 2.5.2 of the SI8271 datasheet.
SI8271GAD-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
SI8271GAD-ISR FAQ
1.How can I place an order for SI8271GAD-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8271GAD-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 SI8271GAD-ISR reliable?
The price and inventory of SI8271GAD-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8271GAD-ISR is usually 5 days.
3.What payment methods are accepted for SI8271GAD-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8271GAD-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8271GAD-ISR?
SI8271GAD-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8271GAD-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 SI8271GAD-ISR?
For technical support, including SI8271GAD-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8271GAD-ISR requirements.
6.How does Aetrix verify that SI8271GAD-ISR is sourced from the original manufacturer or authorized distributors?
All SI8271GAD-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 SI8271GAD-ISR meets industry standards.
7.What is the process for return or replacement of SI8271GAD-ISR?
All SI8271GAD-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8271GAD-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 SI8271GAD-ISR part is unused and in its original packaging.
Return procedure for SI8271GAD-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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