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Skyworks Solutions Inc. SI8221CC-A-ISR
- Part No.:
- SI8221CC-A-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8221CC-A-ISR.pdf
- Description:
- DGTL ISO 3.75KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,796
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Product details
Overview
SI8221CC-A-ISR from Skyworks Solutions is a 2.5 A peak-output isolated gate driver with opto-emulator input, 5.0 kVRMS reinforced isolation (UL1577), 60 ns max propagation delay, and –40 to +125 °C operation. It replaces HCPL-3120/HCPL-0302 in IGBT/MOSFET gate drive circuits for industrial inverters and UPS systems.
For engineers reviewing the SI8221CC-A-ISR datasheet, SI8221CC-A-ISR pinout, SI8221CC-A-ISR application, or SI8221CC-A-ISR equivalent, key selection criteria include its 5.0 kVRMS isolation rating, 2.5 A sink/source capability, SOIC-8 narrow-body package, UVLO hysteresis of 1000 mV, and CMTI of 30 kV/µs - all critical for high-reliability motor control and power conversion designs.
Technical Context
The SI8221CC-A-ISR implements RF-based on/off keying across a silicon isolation barrier, eliminating LED aging and temperature drift inherent in optocouplers. Its input emulates an LED but requires only 5–20 mA forward current, and propagation delay remains stable across input drive levels.
It features a fixed 12.5 V UVLO threshold with 1000 mV hysteresis, operates from 6.5–24 V VDD, and delivers 2.5 A peak output current with 20 ns rise/fall times (CL = 200 pF). The device is AEC-Q100 qualified and certified to UL1577, VDE 0884-5, CSA 5A, and CQC GB4943.1 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 5.0 kVRMS (1 min, UL1577); enables reinforced insulation in 600 VRMS mains-connected systems |
| Peak Output Current | 2.5 A sink/source; drives high-gate-charge IGBTs and SiC MOSFETs without external buffers |
| Propagation Delay | ≤60 ns (tPLH), ≤40 ns (tPHL); supports >10 MHz switching in SMPS and motor control |
| CMTI | 30 kV/µs minimum; maintains signal integrity during fast dv/dt transients in inverter legs |
| UVLO Threshold | 12.5 V rising (±1.3 V), 11.6–13.8 V falling; prevents erratic gate drive during brown-out conditions |
| Operating Temperature | –40 to +125 °C ambient; suitable for under-hood automotive and industrial enclosure environments |
| Package | SOIC-8 narrow body (5.3 mm width); compatible with legacy optocoupler footprints and automated assembly |
Pinout & Package
SI8221CC-A-ISR uses an 8-pin narrow-body SOIC package (5.3 mm width) with creepage/clearance ≥4.01 mm / 4.9 mm per IEC 60664-1. Pin 1 is ANODE, Pin 2 is CATHODE, Pin 3 is VO (output), Pin 4 is VSS (driver ground), Pin 5 is NC, Pin 6 is NC, Pin 7 is NC, Pin 8 is VDD (driver supply).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | ANODE | Input anode terminal; connects to MCU/FPGA I/O or open-drain driver; requires 5–20 mA forward current |
| 2 | CATHODE | Input cathode terminal; referenced to system ground or floating control domain; defines input polarity |
| 3 | VO | Output driver terminal; sources/sinks up to 2.5 A; directly interfaces IGBT/MOSFET gate terminals |
| 4 | VSS | Driver-side ground reference; must be tied to gate driver local ground; not connected to primary-side ground |
| 5–7 | NC | No-connect pins; must remain unconnected per design; no internal connection or function |
| 8 | VDD | Driver supply input; accepts 6.5–24 V; requires local 0.1 µF + 10 µF decoupling near pin |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation barrier | Eliminates LED degradation and temperature drift; ensures <1% unit-to-unit propagation delay variation over life |
| Input current efficiency | 5 mA typical turn-on current (vs. 10–16 mA for HCPL-3120); reduces MCU GPIO loading and power loss |
| UVLO with hysteresis | 1000 mV hysteresis at 12.5 V threshold; prevents oscillation during marginal supply conditions |
| High CMTI | 30 kV/µs common-mode transient immunity; sustains reliable operation in noisy inverter half-bridges |
| AEC-Q100 qualification | Grade 1 (–40 to +125 °C) qualification; validated for automotive traction inverter and onboard charger applications |
Applications
| Industrial Motor Drives | Switch-Mode Power Supplies |
|---|---|
Use Scenario: Driving high-side IGBTs in three-phase VFDs with 600 V DC bus and 15 kHz PWM. IC Role / Device Role / Timing Role: Isolated gate driver providing level-shifted, noise-immune turn-on/turn-off signals with precise timing control. Use Value: 60 ns max propagation delay and 30 kV/µs CMTI prevent shoot-through and ensure clean commutation under EMI stress. |
Use Scenario: Gate driving SiC MOSFETs in 3.3 kW LLC resonant converter with 300 kHz switching. IC Role / Device Role / Timing Role: High-speed isolated driver enabling fast switching while maintaining galvanic separation between primary and secondary sides. Use Value: 2.5 A peak output current and 20 ns rise time support low-loss SiC gate charging without external buffers. |
| Uninterruptible Power Systems | Automotive Onboard Chargers |
Use Scenario: Controlling bidirectional IGBT modules in 10 kVA UPS inverters operating at 10–20 kHz. IC Role / Device Role / Timing Role: Reinforced-isolation driver ensuring functional safety during grid fault transitions and battery backup mode changes. Use Value: 5.0 kVRMS isolation and AEC-Q100 qualification meet IEC 62040-1 and UL 1741 SB requirements for grid-tied systems. |
Use Scenario: Driving GaN HEMTs in 11 kW OBC PFC and DC-DC stages exposed to automotive thermal and EMC environments. IC Role / Device Role / Timing Role: Robust gate driver delivering consistent timing and drive strength across –40 to +125 °C junction temperature range. Use Value: Stable 2.5 A output and 125 °C ambient rating enable compact, convection-cooled OBC designs without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8221CC-B-ISR | Same 5.0 kVRMS isolation and SOIC-8 package, but with 8 V UVLO threshold (vs. 12.5 V) | Suitable for lower-voltage gate drive rails (e.g., 12 V VDD systems); less margin against supply sag | Select when system VDD is stable at 12–15 V and UVLO reset at ~7.2 V is acceptable |
| HCPL-3120-000E | Optocoupler-based; 2.5 A output but 500 ns propagation delay, 15 kV/µs CMTI, and LED aging effects | Legacy drop-in replacement where isolation rating ≤3.75 kVRMS suffices and timing slack exists | Choose only for cost-sensitive, low-frequency (<50 kHz), non-automotive applications with relaxed reliability requirements |
Compared with SI8221CC-A-ISR, Si8221CC-B-ISR offers lower UVLO for tighter supply monitoring but reduced headroom, while HCPL-3120-000E trades isolation robustness, timing precision, and lifetime stability for legacy compatibility and lower unit cost.
Availability
SI8221CC-A-ISR is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power systems, and automotive onboard chargers requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.
Supply support for SI8221CC-A-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 wireless and power systems.
The Si8220/21 family was designed to replace aging optocoupled gate drivers with silicon-isolated alternatives offering superior timing accuracy, CMTI, and lifetime stability in industrial and automotive power electronics.
FAQ
What is the isolation voltage rating of the SI8221CC-A-ISR?
The SI8221CC-A-ISR is rated for 5.0 kVRMS isolation per UL1577 (1 minute test), with production-tested withstand voltage of 6.0 kVRMS. This corresponds to reinforced insulation per IEC 60747-5-5 and supports up to 600 VRMS working voltage in end equipment. The SI8221CC-A-ISR achieves this using Skyworks' proprietary silicon RF isolation technology, not optical coupling.
Does the SI8221CC-A-ISR require external components for basic operation?
Yes - the SI8221CC-A-ISR requires local decoupling: a 0.1 µF ceramic capacitor and a 10 µF bulk capacitor placed between VDD and VSS, as close to pins 8 and 4 as possible. No external pull-ups, resistors, or timing components are needed for core gate drive functionality. Input current limiting may be required depending on the source driver's capability, but the SI8221CC-A-ISR itself operates standalone.
Can the SI8221CC-A-ISR drive SiC MOSFETs directly?
Yes - the SI8221CC-A-ISR delivers 2.5 A peak sink/source current and 20 ns rise/fall times (CL = 200 pF), making it suitable for direct gate driving of medium-power SiC MOSFETs (e.g., up to 1200 V / 40 mΩ devices in 10–50 kW converters). Layout optimization (short gate loop, Kelvin source connection) is recommended to fully exploit its performance.
What is the UVLO behavior of the SI8221CC-A-ISR during power-up?
The SI8221CC-A-ISR holds VO low until VDD rises above 12.4 V (min), remains latched high once enabled, and reasserts UVLO when VDD falls below 11.6 V (min). Startup time from UVLO exit to valid VO is ≤40 µs. This hysteresis (1000 mV) prevents chatter during marginal supply conditions - a key reliability feature absent in optocouplers like HCPL-3120.
Is the SI8221CC-A-ISR pin-compatible with HCPL-3120?
Yes - the SI8221CC-A-ISR uses an SOIC-8 narrow-body package with identical pinout (ANODE, CATHODE, VO, VSS, NC, NC, NC, VDD) and footprint as HCPL-3120. No PCB redesign is required for drop-in replacement; however, input resistor values may need adjustment to limit IF to ≤20 mA, and VDD must be limited to ≤24 V per SI8221CC-A-ISR specifications.
SI8221CC-A-ISR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Capacitive Coupling
- Number of Channels:
- 1
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 30kV/µs (Typ)
- Propagation Delay tpLH / tpHL (Max):
- 60ns, 40ns
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- 30ns, 30ns (Max)
- Current - Output High, Low:
- 300mA, 500mA
- Current - Peak Output:
- 500mA
- Voltage - Forward (Vf) (Typ):
- 2.5V (Max)
- Current - DC Forward (If) (Max):
- 30 mA
- Voltage - Output Supply:
- 12.2V ~ 24V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
- Approval Agency:
- CSA, UR, VDE
SI8221CC-A-ISR FAQ
1.How can I place an order for SI8221CC-A-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8221CC-A-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 SI8221CC-A-ISR reliable?
The price and inventory of SI8221CC-A-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8221CC-A-ISR is usually 5 days.
3.What payment methods are accepted for SI8221CC-A-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8221CC-A-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8221CC-A-ISR?
SI8221CC-A-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8221CC-A-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 SI8221CC-A-ISR?
For technical support, including SI8221CC-A-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8221CC-A-ISR requirements.
6.How does Aetrix verify that SI8221CC-A-ISR is sourced from the original manufacturer or authorized distributors?
All SI8221CC-A-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 SI8221CC-A-ISR meets industry standards.
7.What is the process for return or replacement of SI8221CC-A-ISR?
All SI8221CC-A-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8221CC-A-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 SI8221CC-A-ISR part is unused and in its original packaging.
Return procedure for SI8221CC-A-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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