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Skyworks Solutions Inc. SI8221DC-A-ISR
- Part No.:
- SI8221DC-A-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8221DC-A-ISR.pdf
- Description:
- DGTL ISO 3.75KV 1CH GT DVR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,591
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Product details
Overview
SI8221DC-A-ISR from Skyworks Solutions is a 2.5 A peak-output isolated gate driver with opto-emulator input, 5.0 kVRMS reinforced isolation (UL 1577), 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 SI8221DC-A-ISR datasheet, SI8221DC-A-ISR pinout, SI8221DC-A-ISR application, or SI8221DC-A-ISR equivalent, key selection criteria include its 5.0 kVRMS isolation rating, 2.5 A sink/source capability, UVLO hysteresis of 1000 mV (12.5 V threshold), SOIC-8 narrow-body package, and functional compatibility with legacy opto-driver layouts.
Technical Context
The SI8221DC-A-ISR implements RF-based on/off keying across a silicon isolation barrier-replacing LED/photodiode coupling-to deliver stable timing independent of input current. Its input emulates an LED but requires only 5–20 mA forward current, enabling direct MCU/FPGA I/O drive without external transistors.
Internally, it integrates under-voltage lockout with 12.5 V turn-on threshold (±0.7 V hysteresis), 30 kV/µs common-mode transient immunity, and output drivers optimized for 6.5–24 V gate supply. The device operates as a single-channel, unidirectional, high-side or low-side compatible gate driver with logic-high output when input current exceeds 5 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.0 kVRMS (1 min, UL 1577); enables reinforced insulation in 600 VRMS mains-connected industrial equipment. |
| Peak Output Current | 2.5 A sink/source; drives high-gate-charge IGBTs and GaN FETs without external buffers in SMPS and motor drives. |
| Propagation Delay | ≤60 ns (tPLH), ≤40 ns (tPHL); ensures tight timing control in high-frequency (>1 MHz) switching applications. |
| UVLO Threshold | 12.5 V turn-on (VDDUV+ = 12.4–14.8 V), 11.6–13.8 V turn-off; prevents erratic gate switching during brown-out conditions. |
| Common-Mode Immunity | 30 kV/µs CMTI; maintains signal integrity in noisy power-conversion environments with fast dv/dt transients. |
| Operating Temperature | –40 to +125 °C ambient; supports deployment in enclosed industrial enclosures and automotive under-hood zones. |
| Supply Voltage Range | 6.5–24 V on VDD; compatible with standard 12 V/15 V gate driver rails and eliminates need for LDO pre-regulation. |
Pinout & Package
SI8221DC-A-ISR is housed in an 8-pin narrow-body SOIC (SOIC-8 NB) package with creepage/clearance ≥4.01 mm / 4.9 mm and RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VSS) | Input-side ground reference | Return path for input LED emulator; must be isolated from output ground plane. |
| 2 (VDD) | Output-side supply rail | Power source for gate driver stage; requires local 0.1 µF + 10 µF decoupling. |
| 3 (VO) | Driver output terminal | Push-pull output capable of sourcing/sinking 2.5 A; connects directly to MOSFET/IGBT gate. |
| 4 (VSS) | Output-side ground reference | Return path for output stage; forms isolated secondary side with VDD and VO. |
| 5 (CATHODE) | Input cathode terminal | Connects to system ground or controller low-side when used with open-drain drivers. |
| 6 (ANODE) | Input anode terminal | Accepts 5–20 mA forward current from MCU GPIO or transistor switch; no external LED required. |
| 7 (NC) | No-connect | Internally unused; must remain floating per datasheet layout guidance. |
| 8 (NC) | No-connect | Internally unused; must remain floating and not tied to any net. |
Key Features
| Feature | Design Value |
|---|---|
| RF-based isolation architecture | Eliminates LED aging drift and temperature-dependent gain shift-enabling ±0.5% propagation delay stability over life and temperature. |
| Input current independence | Propagation delay remains constant across 5–20 mA input drive range-simplifying input circuit design and removing IF tuning requirements. |
| 14× tighter part-to-part matching | Reduces timing skew in multi-phase inverter designs, enabling synchronous switching without calibration or trimming. |
| AEC-Q100 qualified | Validated for automotive-grade reliability (Grade 1: –40 to +125 °C), supporting use in EV traction inverters and onboard chargers. |
| SOIC-8 narrow-body footprint | Direct drop-in replacement for HCPL-3120/HCPL-0302-no PCB redesign needed for legacy opto-driver layouts. |
Applications
| Industrial Motor Drives | Uninterruptible Power Supplies |
|---|---|
Use Scenario: Driving high-voltage IGBT half-bridges in servo amplifiers with >10 kHz PWM frequency and >1 kV bus voltage. IC Role / Device Role / Timing Role: Isolated gate driver providing level-shifted, noise-immune turn-on/turn-off signals to upper-leg IGBTs. Use Value: 30 kV/µs CMTI and 5.0 kVRMS isolation prevent false triggering during high-dv/dt commutation events. | Use Scenario: Controlling SiC MOSFETs in double-conversion online UPS inverters operating at 50–100 kHz switching frequency. IC Role / Device Role / Timing Role: Unidirectional gate driver delivering precise 2.5 A peak current to minimize switching losses in high-efficiency topologies. Use Value: 60 ns max tPLH enables <100 ns dead-time control-critical for minimizing shoot-through risk in full-bridge configurations. |
| Switch-Mode Power Supplies | Inverters for Renewable Energy |
Use Scenario: Gate driving GaN HEMTs in 1–3 kW telecom rectifiers and server PSUs requiring >1 MHz operation. IC Role / Device Role / Timing Role: High-speed isolated driver interfacing between PWM controller and fast-switching power devices. Use Value: 20 ns output rise/fall time (CL = 200 pF) preserves waveform fidelity and reduces EMI generation at high frequencies. | Use Scenario: Driving 1200 V IGBTs in solar string inverters exposed to outdoor thermal cycling and grid fault transients. IC Role / Device Role / Timing Role: Reinforced-isolation gate driver ensuring safe operation under IEC 62109 and UL 1741 requirements. Use Value: VDE-certified 5.0 kVRMS isolation and 891 Vpeak working voltage meet reinforced insulation requirements for PV DC-side isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8220DC-A-ISR | 0.5 A peak output current; identical 5.0 kVRMS isolation, SOIC-8 NB package, and pinout. | Suitable for low-power MOSFETs (<50 nC gate charge); insufficient for high-current IGBTs or GaN FETs. | Select when gate drive strength requirement is ≤0.5 A and cost optimization is prioritized. |
| ACPL-312T-000E | Optocoupler-based; 2.5 A peak output but 200 ns propagation delay, higher IF(ON) = 16 mA, and aging-sensitive LED. | Limited lifetime in high-temperature environments; requires larger input drive margin and derating over time. | Choose only if legacy opto qualification or specific regulatory legacy acceptance is mandatory. |
Compared with Si8220DC-A-ISR, SI8221DC-A-ISR delivers 5× higher peak drive strength for demanding power stages, while ACPL-312T-000E trades timing precision and long-term stability for optical legacy compliance-making SI8221DC-A-ISR optimal for new high-efficiency, high-reliability designs.
Availability
SI8221DC-A-ISR is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies, and renewable-energy inverters requiring stable component supply, long-lifecycle support, and certified reinforced isolation.
Supply support for SI8221DC-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.
The Si822x family was designed specifically to replace aging optocoupled gate drivers with silicon-isolated alternatives offering superior timing accuracy, thermal stability, and safety certification-targeting industrial, automotive, and energy infrastructure applications.
FAQ
What is the isolation voltage rating of the SI8221DC-A-ISR?
The SI8221DC-A-ISR is rated for 5.0 kVRMS isolation per UL 1577 (1 minute test), with production-tested withstand voltage of 6.0 kVRMS. This corresponds to 891 Vpeak working voltage under IEC 60747-5-5 for reinforced insulation-validating its use in 600 VRMS mains-connected equipment such as industrial inverters and UPS systems. SI8221DC-A-ISR meets VDE, CSA, and CQC safety standards for this rating.
Does the SI8221DC-A-ISR require an external LED in its input circuit?
No, the SI8221DC-A-ISR does not require an external LED. Its input stage emulates LED electrical behavior using a proprietary silicon circuit that accepts 5–20 mA forward current directly from MCU GPIO, FPGA outputs, or open-drain drivers. This eliminates LED aging, temperature drift, and external component count-reducing BOM cost and improving long-term reliability versus optocoupler-based alternatives like HCPL-3120. SI8221DC-A-ISR's ANODE and CATHODE pins interface identically to an LED but contain no optoelectronic element.
What is the UVLO behavior of the SI8221DC-A-ISR?
The SI8221DC-A-ISR features under-voltage lockout with a 12.5 V turn-on threshold (VDDUV+ = 12.4–14.8 V) and 11.6–13.8 V turn-off threshold, yielding 1000 mV hysteresis. When VDD falls below the lower threshold, VO is forced low to prevent partial gate turn-on. Startup delay (tSTART) is ≤40 µs after VDD crosses VDDUV+. This behavior ensures robust operation during power sequencing and brown-out events in industrial power supplies and motor drives. SI8221DC-A-ISR's UVLO protects downstream power devices from undefined states.
Can the SI8221DC-A-ISR drive both N-channel and P-channel MOSFETs?
Yes, the SI8221DC-A-ISR can drive both N-channel and P-channel MOSFETs. As a unidirectional, non-inverting push-pull output driver, it sources up to 2.5 A to pull VO high (turning on a P-channel high-side switch or N-channel low-side switch) and sinks up to 2.5 A to pull VO low (turning off a P-channel or on an N-channel). Its output swing ranges from VSS to VDD–0.1 V (high) and up to 50 mV above VSS (low), making it compatible with standard logic-level and gate-threshold voltages. SI8221DC-A-ISR's flexible output stage supports diverse topology implementations without external level-shifting components.
Is the SI8221DC-A-ISR pin-compatible with the HCPL-3120?
Yes, the SI8221DC-A-ISR is pin-compatible with the HCPL-3120 in the SOIC-8 narrow-body package. Pin assignments match exactly: VSS (1), VDD (2), VO (3), VSS (4), CATHODE (5), ANODE (6), NC (7), NC (8). No PCB layout changes are required for drop-in replacement. However, SI8221DC-A-ISR uses lower input current (5–20 mA vs. 16 mA typical for HCPL-3120), offers tighter propagation delay matching, and provides 5.0 kVRMS isolation versus HCPL-3120's 3.75 kVRMS-enhancing safety margin in new designs.
SI8221DC-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:
- 14.8V ~ 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
SI8221DC-A-ISR FAQ
1.How can I place an order for SI8221DC-A-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8221DC-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 SI8221DC-A-ISR reliable?
The price and inventory of SI8221DC-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 SI8221DC-A-ISR is usually 5 days.
3.What payment methods are accepted for SI8221DC-A-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8221DC-A-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8221DC-A-ISR?
SI8221DC-A-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8221DC-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 SI8221DC-A-ISR?
For technical support, including SI8221DC-A-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8221DC-A-ISR requirements.
6.How does Aetrix verify that SI8221DC-A-ISR is sourced from the original manufacturer or authorized distributors?
All SI8221DC-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 SI8221DC-A-ISR meets industry standards.
7.What is the process for return or replacement of SI8221DC-A-ISR?
All SI8221DC-A-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI8221DC-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 SI8221DC-A-ISR part is unused and in its original packaging.
Return procedure for SI8221DC-A-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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