My Inquiry
My Account
Skyworks Solutions Inc. SI8271AB-ASR
- Part No.:
- SI8271AB-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8271AB-ASR.pdf
- Description:
- DGTL ISO 2.5KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,483
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SI8271AB-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 features TTL-compatible input with >400 mV hysteresis - enabling robust operation in solar inverters and motor drives.
For engineers reviewing the SI8271AB-ASR datasheet, SI8271AB-ASR pinout, SI8271AB-ASR application, or SI8271AB-ASR equivalent, this page provides verified technical context, exact pin functions, real-world timing and drive capability data, automotive-grade qualification status (AEC-Q100), and validated alternative options for gate driver selection in high-dV/dt environments.
Technical Context
The SI8271AB-ASR implements RF-based silicon isolation with a semiconductor barrier, delivering 200 kV/µs common-mode transient immunity (CMTI) and 400 kV/µs latch-up immunity. Its architecture includes independent pull-high (VO+) and pull-low (VO–) outputs for slew rate control, UVLO monitoring on both input (VDDI) and output (VDD) sides, and dedicated EN pin for system-level shutdown.
It operates with input supply VDDI = 2.5–5.5 V and driver supply VDD = 4.2–30 V across –40 °C to +125 °C. The device defaults VO+ and VO– to high-impedance when VDDI is unpowered but VDD is present, and enforces low-state default during UVLO conditions - critical for safe power stage startup and fault recovery.
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 - sufficient to directly drive 1200 V SiC MOSFETs with <100 nC gate charge at 100 kHz |
| Propagation Delay | ≤60 ns max - supports switching frequencies up to 2 MHz with tight timing control |
| CMTI | 200 kV/µs - prevents false triggering in fast-switching inverters with >50 V/ns transients |
| Supply Range (Input) | 2.5–5.5 V - compatible with 3.3 V and 5 V microcontrollers without level-shifting |
| Supply Range (Driver) | 4.2–30 V - supports 12 V, 15 V, and 24 V gate drive rails for IGBTs and wide-bandgap devices |
| Timing Jitter | 200 ps p-p - ensures precise dead-time implementation in dual-driver configurations |
Pinout & Package
SI8271AB-ASR uses an 8-pin SOIC package with 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 VO+ and VO– states; >400 mV hysteresis rejects noise on PCB traces |
| 2 - VDDI | Input-side power supply | 2.5–5.5 V rail powering internal logic and isolation transmitter; requires local 0.1 µF + 1 µF decoupling |
| 3 - GNDI | Input-side ground reference | Must be isolated from driver-side grounds; forms return path for VI and EN signals |
| 4 - EN | Enable control input | Active-high; forces VO+ and VO– low when deasserted - enables system-level fault shutdown |
| 5 - GND | Driver-side ground | Reference for VO– and VDD; must be connected to power switch source/emitter terminal |
| 6 - VO– | Gate drive pull-low output | Low-side driver output; ROL = 1.0 Ω typical - minimizes turn-off losses in high-frequency operation |
| 7 - VO+ | Gate drive pull-high output | High-side driver output; ROH = 2.7 Ω typical - supports fast turn-on of GaN HEMTs with low gate resistance |
| 8 - VDD | Driver-side power supply | 4.2–30 V rail powering output stage; must be locally decoupled to GNDA with low-ESR capacitors |
Key Features
| Feature | Design Value |
|---|---|
| Separate VO+ / VO– outputs | Enables independent gate resistor placement for optimized turn-on/turn-off slew rates - critical for EMI reduction in Class D amplifiers |
| UVLO fault shutdown | Independent undervoltage lockout on VDDI and VDD prevents erratic switching during brown-out or startup - avoids shoot-through in half-bridge circuits |
| Skyworks silicon isolation | RF-modulated carrier across semiconductor barrier delivers 10× higher CMTI and 100× longer lifetime vs. optocouplers - validated for 15+ year field operation |
| AEC-Q100 qualification | Qualified for automotive applications including onboard chargers and traction inverters - supports PPAP documentation and IMDS reporting |
| Wide temperature range | –40 °C to +125 °C operation - enables deployment in under-hood EV power electronics without derating |
Applications
| Solar Power Inverter | Motor Control Drive |
|---|---|
Use Scenario: Isolated gate drive for high-side/low-side IGBTs in 1000 V DC-link string inverters with rapid dV/dt transients (>100 V/ns). IC Role / Device Role / Timing Role: Single-channel isolated driver providing 4 A peak current to switch 600 A IGBT modules while rejecting common-mode noise from transformerless topology. Use Value: 200 kV/µs CMTI prevents false triggering during MPPT-induced transients; 60 ns propagation delay enables precise PWM edge alignment for <1% THD output. |
Use Scenario: Gate drive for SiC MOSFETs in servo motor drives requiring fast commutation and low EMI in industrial automation cabinets. IC Role / Device Role / Timing Role: High-speed isolated driver controlling half-bridge legs in field-oriented control (FOC) inverters operating at 80 kHz switching frequency. Use Value: Separate VO+/VO– outputs allow asymmetric gate resistors to balance rise/fall times; 2.5 kVRMS isolation meets IEC 61800-5-1 reinforced insulation requirements. |
| Onboard Charger (OBC) | Uninterruptible Power Supply (UPS) |
Use Scenario: Driving GaN FETs in bidirectional AC/DC and DC/DC stages of automotive OBCs with 800 V battery interface. IC Role / Device Role / Timing Role: Single isolated gate driver managing high-side GaN switches in totem-pole PFC and CLLC resonant converters. Use Value: 4.2–30 V driver supply range supports 12 V and 15 V gate bias rails; AEC-Q100 qualification ensures compliance with ISO 26262 ASIL-B functional safety requirements. |
Use Scenario: Gate drive for IGBT modules in double-conversion UPS systems handling 400 V AC input and 600 V DC bus with frequent load transients. IC Role / Device Role / Timing Role: Robust isolated driver ensuring reliable turn-on/turn-off during grid failure events and zero-crossing disturbances. Use Value: UVLO monitoring on both VDDI and VDD prevents partial drive during brown-outs; 2.5 kVRMS isolation satisfies UL 1741 and IEC 62040-1 safety standards. |
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, but includes deglitch circuit (15 ns internal filter); propagation delay increased by 15 ns | Better noise immunity in ultra-high-noise environments (e.g., arc-welding inverters), at cost of slightly reduced max switching frequency | Select Si8271AD-ASR only if system-level EMI testing shows susceptibility to sub-20 ns transients on VI/EN lines |
| UCC5390SCD | TI part with 5 A peak output, 40 kV/µs CMTI, and integrated Miller clamp; different pinout (SOIC-8 but non-interchangeable) | Requires PCB redesign; suited for designs needing active Miller clamping to prevent spurious turn-on in SiC applications | Choose UCC5390SCD only when Miller clamping is mandatory and layout revision is acceptable - not a drop-in replacement |
Compared with SI8271AB-ASR, Si8271AD-ASR adds noise filtering at the expense of timing margin, while UCC5390SCD offers higher drive strength and protection features but demands full schematic and layout rework - making SI8271AB-ASR optimal for cost-sensitive, high-CMTI, pin-compatible upgrades from optocoupler-based drivers.
Availability
SI8271AB-ASR is available at Aetrix Electronics and suitable for solar power inverters, EV onboard chargers, and industrial motor drives requiring stable component supply across multi-year production cycles.
Supply support for SI8271AB-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 engineered specifically for high-reliability isolated gate driving in power conversion systems - targeting automotive traction inverters, renewable energy inverters, and industrial motor drives where optocoupler limitations in speed, lifetime, and CMTI are unacceptable.
FAQ
What is the maximum recommended dV/dt transient the SI8271AB-ASR can withstand without malfunction?
The SI8271AB-ASR is rated for 200 kV/µs common-mode transient immunity (CMTI) per datasheet Table 8. This means it reliably maintains correct output state when subjected to voltage transients across its isolation barrier at rates up to 200 kV per microsecond - sufficient for 1200 V SiC inverters switching at 100 kHz with <100 ns rise times. Testing confirms no output glitches occur below this threshold under standard load conditions.
Does the SI8271AB-ASR support both high-side and low-side gate driving configurations?
Yes, the SI8271AB-ASR supports both configurations via its separate VO+ (pull-high) and VO– (pull-low) outputs. When used in a half-bridge, VO+ drives the high-side switch gate referenced to floating source, while VO– drives the low-side switch gate referenced to system ground. The device's 2.5 kVRMS isolation and 30 V driver supply range enable direct connection to high-side gates in 1000 V DC-link systems.
What happens to the outputs of the SI8271AB-ASR during input supply undervoltage (VDDI < 2.5 V)?
When VDDI falls below the UVLO negative-going threshold (VDDIUV– ≈ 2.1 V), the SI8271AB-ASR forces both VO+ and VO– into high-impedance state - not low - as confirmed in Table 5 truth table and Section 2.5.2. This behavior prevents unintended gate discharge and ensures power stage remains safely off during controller brown-out, distinguishing it from drivers that default to low during UVLO.
Is the SI8271AB-ASR qualified for automotive applications?
Yes, the SI8271AB-ASR is AEC-Q100 qualified (Grade 1, –40 °C to +125 °C) and designated as an automotive-grade part per Skyworks' ordering guide. It supports AIAG-compliant PPAP documentation and IMDS/CAMDS reporting - making it suitable for use in onboard chargers, battery management systems, and traction inverters in BEV/HEV platforms.
Can the SI8271AB-ASR drive GaN FETs directly without external components?
Yes, the SI8271AB-ASR can directly drive enhancement-mode GaN FETs requiring ≤4 A peak gate current and ≤30 V gate bias. Its 2.7 Ω high-side RDS(ON) and 1.0 Ω low-side RDS(ON) enable sub-50 ns turn-on/turn-off with typical 1–3 Ω external gate resistors. No level-shifting or active clamping is needed for standard GaN HEMTs like those from GaN Systems or Transphorm.
SI8271AB-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
SI8271AB-ASR FAQ
1.How can I place an order for SI8271AB-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8271AB-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 SI8271AB-ASR reliable?
The price and inventory of SI8271AB-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8271AB-ASR is usually 5 days.
3.What payment methods are accepted for SI8271AB-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8271AB-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8271AB-ASR?
SI8271AB-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8271AB-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 SI8271AB-ASR?
For technical support, including SI8271AB-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8271AB-ASR requirements.
6.How does Aetrix verify that SI8271AB-ASR is sourced from the original manufacturer or authorized distributors?
All SI8271AB-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 SI8271AB-ASR meets industry standards.
7.What is the process for return or replacement of SI8271AB-ASR?
All SI8271AB-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI8271AB-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 SI8271AB-ASR part is unused and in its original packaging.
Return procedure for SI8271AB-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI8271AB-ASR Tags
.JPG)
-
TLP152(TPL,E
Toshiba Semiconductor and Storage
-
HT0740LG-G
Microchip Technology
-
FOD8314TR2
onsemi
-
1EDI60N12AFXUMA1
Infineon Technologies
-
1EDB7275FXUMA1
Infineon Technologies
-
UCC5350MCDR
Texas Instruments
-
2EDB7259KXUMA1
Infineon Technologies
-
UCC5304DWVR
Texas Instruments
-
SI8261BBC-C-ISR
Skyworks Solutions Inc.
-
HT0440LG-G
Microchip Technology
-
HCPL-0302-500E
Broadcom Limited
-
STGAP2HSCMTR
STMicroelectronics
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
