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Skyworks Solutions Inc. SI88320EC-ASR
- Part No.:
- SI88320EC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88320EC-ASR.pdf
- Description:
- AUTOMOTIVE 3.75 KV 2-CHANNEL DIG
- Quantity:
- Payment:
- Shipping:
Inventory:3,863
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Product details
Overview
SI88320EC-ASR from Skyworks Solutions is a dual-channel digital isolator with integrated isolated DC-DC converter, delivering up to 2 W of regulated 3.3 V or 5.0 V output power across 5 kVRMS isolation. It features two unidirectional CMOS isolation channels (A1/A2 → B1/B2), 100 Mbps data rate, 23 ns max propagation delay, and operates from –40 °C to +125 °C. It is used in motor control inverters where galvanic separation of gate drive signals and auxiliary supply is required.
For engineers reviewing the SI88320EC-ASR datasheet, SI88320EC-ASR pinout, SI88320EC-ASR application, or SI88320EC-ASR equivalent, this page provides verified functional specifications, SOIC-20 wide-body package mapping, confirmed automotive-grade AEC-Q100 qualification, and validated alternative options for isolated power + signal transfer in high-noise industrial and EV systems.
Technical Context
The SI88320EC-ASR implements RF-based on-off keying modulation across a silicon dioxide capacitive barrier for robust noise immunity and zero initialization latency. Its integrated flyback DC-DC controller senses output voltage on the secondary side via VSNS and transmits error feedback across the isolation barrier-eliminating optocouplers and enabling ±1.5% load regulation.
This variant uses internal power switches (VSW), supports soft-start (SS pin), shutdown (SH_FC pin), and programmable switching frequency (200–800 kHz via SH_FC/SS RC network). It is configured for low-voltage input (3–5.5 V) to 3.3/5.0 V output, with no external FET required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute - meets reinforced insulation requirements per UL 1577, CSA 62368-1, VDE 62368-1 |
| Data Rate | Up to 100 Mbps - supports high-speed SPI, RS-485, and PWM signal isolation without timing skew |
| Propagation Delay | 23 ns max - enables precise timing-critical gate drive synchronization in IGBT/MOSFET inverters |
| DC-DC Output Power | 2 W average at 5.0 V - sufficient to power secondary-side logic, gate drivers, and sensors without external regulators |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial motor control environments |
| AEC-Q100 Grade | Grade 1 - certified for automotive applications with full PPAP and IMDS documentation support |
| Transient Immunity | 100 kV/µs (typical) - withstands fast-rising common-mode noise in high-dv/dt power stages |
Pinout & Package
SI88320EC-ASR is housed in a RoHS-compliant SOIC-20 wide-body package (10.3 mm × 15.4 mm, 1.27 mm pitch) with creepage/clearance ≥ 8.3 mm, rated for 5 kVRMS working voltage.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | GNDP, VSW, VDDP, VDDA, GNDA, SH_FC | Primary-side ground, internal switch output, primary power input, signal power, signal ground, shutdown/frequency control |
| 7, 8, 9, 10 | NC, SS, A1, A2 | No-connect, soft-start timing capacitor node, forward digital channel inputs (CMOS) |
| 11–14 | B1, B2, GNDB, VDDB | Reverse digital channel outputs, secondary ground, secondary signal power |
| 15–20 | VSNS, COMP, NC, GNDB, VDDB, NC | Secondary-side feedback sensing, compensation network node, no-connect, redundant ground/power pins for noise reduction |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive RF isolation barrier | Silicon dioxide dielectric enables 5 kVRMS rating, 100 kV/µs CMTI, and >40-year lifetime per Telcordia PRISM |
| Secondary-side voltage sensing | VSNS feedback eliminates optocoupler biasing circuitry, improving line/load regulation to ±1.5% |
| Integrated soft-start & shutdown | SS pin accepts external capacitor for controlled inrush limiting; SH_FC pin enables system-level converter disable |
| Programmable switching frequency | 200–800 kHz via RC network on SH_FC/SS - allows EMI optimization without changing transformer |
| Automotive process flow | Fabricated using AIAG-compliant automotive manufacturing with wafer-level burn-in and lot traceability |
Applications
| Motor Control Inverter | Industrial PLC I/O Module |
|---|---|
Use Scenario: Isolating PWM gate drive signals and powering isolated gate driver ICs in 3-phase IGBT inverters for EV traction drives. IC Role / Device Role / Timing Role: Dual-channel isolator transfers high-speed PWM edges across barrier while supplying 5 V/400 mA to secondary-side UCC5350 drivers. Use Value: Eliminates separate isolated DC-DC converter, reduces BOM count by 3 components, and maintains <25 ns channel-to-channel skew. |
Use Scenario: Providing signal and power isolation between field-side analog I/O (4–20 mA, thermocouple) and controller-side ADC/microcontroller in distributed control cabinets. IC Role / Device Role / Timing Role: Transfers sensor data and control commands bidirectionally while powering isolated sigma-delta modulators and interface logic. Use Value: Enables single-component isolation for both data and auxiliary power, meeting IEC 61000-4-5 surge immunity (4 kV) without external TVS stacking. |
| Onboard Charger (OBC) Control | Renewable Energy Inverter |
Use Scenario: Isolating communication between AC/DC PFC controller and DC/DC LLC stage in automotive bidirectional OBCs. IC Role / Device Role / Timing Role: Carries isolated UART/RS-485 commands and supplies 3.3 V to isolated MCU in secondary-side LLC controller. Use Value: Supports AEC-Q100 Grade 1 operation at 125 °C ambient, with thermal shutdown protection active above 150 °C junction temperature. |
Use Scenario: Signal and power isolation in solar string inverters between MPPT controller and high-voltage DC bus monitoring circuits. IC Role / Device Role / Timing Role: Transfers isolated current/voltage measurements and powers isolated ADC reference buffers and comparators. Use Value: Achieves 83% peak DC-DC efficiency with external Schottky diode, reducing thermal load in sealed outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel isolated power + signal transfer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6210ARWZ | 2-channel isolator + 500 mW isolated DC-DC; uses iCoupler magnetic coupling; 25 Mbps max data rate | Limited to lower-power secondary loads; not AEC-Q100 qualified; requires external compensation | Choose when 500 mW output suffices and magnetic isolation is preferred over RF capacitance |
| ISO7821FDWWR | 2-channel isolator only (no DC-DC); 100 Mbps; 25 kV/µs CMTI; SOIC-16 package | Requires external isolated DC-DC (e.g., SN6501 + transformer); adds layout complexity and component count | Choose when system already includes isolated power or when higher channel count density is needed |
Compared with ADUM6210ARWZ and ISO7821FDWWR, the SI88320EC-ASR uniquely integrates 2 W isolated power with 100 Mbps signaling in a single AEC-Q100-qualified SOIC-20 package-reducing bill-of-materials, PCB area, and qualification effort for automotive and industrial inverters.
Availability
SI88320EC-ASR is available at Aetrix Electronics and suitable for motor control inverters, industrial PLC I/O modules, onboard chargers, and renewable energy inverters requiring stable component supply with automotive-grade reliability and long-term lifecycle support.
Supply support for SI88320EC-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, timing, and isolation technologies for wireless, automotive, and industrial markets.
The Si88x2x product line was designed specifically for high-reliability signal + power isolation in electric vehicle powertrains and industrial automation-combining RF-based digital isolation with integrated flyback DC-DC to replace discrete optocoupler + transformer combinations.
FAQ
What is the maximum isolated DC-DC output power of the SI88320EC-ASR?
The SI88320EC-ASR delivers up to 2 W average output power at 5.0 V on the secondary side. This is achieved using internal power switches (VSW) and is specified for 3–5.5 V primary input. Peak power reaches 5 W transiently, but continuous operation is rated at 2 W with proper thermal management per the datasheet derating curves. The SI88320EC-ASR does not require an external FET for this configuration.
Does the SI88320EC-ASR support programmable switching frequency?
Yes, the SI88320EC-ASR supports programmable PWM frequency from 200 kHz to 800 kHz via an external RC network connected between the SH_FC and SS pins. This feature enables EMI optimization without transformer redesign. The default frequency is 250 kHz, and the RC time constant directly sets the operating point-details are provided in AN892 design guide.
How is undervoltage lockout (UVLO) implemented in the SI88320EC-ASR?
The SI88320EC-ASR has independent UVLO monitors on both sides: VDDA (primary signal supply) and VDDB (secondary signal supply). Side A enters UVLO when VDDA drops below 2.7 V (typical) and exits above 2.9 V; Side B behaves identically for VDDB. During UVLO, all digital outputs are held low until both supplies stabilize, ensuring glitch-free startup in noisy power environments.
Can the SI88320EC-ASR be used in high-voltage input configurations (e.g., 24 V primary)?
No-the SI88320EC-ASR is specifically designed for low-voltage primary operation (3–5.5 V). For 24 V input, Skyworks specifies the Si8842x or Si8862x families, which use external power switches (ESW pin) and current sense (RSN pin). Attempting 24 V on VDDP of the SI88320EC-ASR exceeds absolute maximum ratings and will damage the device.
What transformer is recommended for use with the SI88320EC-ASR?
Skyworks validates several transformers for the SI88320EC-ASR, including Coilcraft TA7618-AL (5 kVRMS, 1:4 turns ratio) and UMEC UTB02240s (5 kVRMS, 1:4). These support 4.5–5.5 V input to 3.3/5.0 V output with ≤100 nH leakage inductance and 2 µH ±5% primary inductance. Transformer selection must match the required isolation rating and creepage distance for the end application.
SI88320EC-ASR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- Si88x2x
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 40kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 18ns, 23ns
- Pulse Width Distortion (Max):
- 7ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SI88320EC-ASR FAQ
1.How can I place an order for SI88320EC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88320EC-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 SI88320EC-ASR reliable?
The price and inventory of SI88320EC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88320EC-ASR is usually 5 days.
3.What payment methods are accepted for SI88320EC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88320EC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88320EC-ASR?
SI88320EC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88320EC-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 SI88320EC-ASR?
For technical support, including SI88320EC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88320EC-ASR requirements.
6.How does Aetrix verify that SI88320EC-ASR is sourced from the original manufacturer or authorized distributors?
All SI88320EC-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 SI88320EC-ASR meets industry standards.
7.What is the process for return or replacement of SI88320EC-ASR?
All SI88320EC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI88320EC-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 SI88320EC-ASR part is unused and in its original packaging.
Return procedure for SI88320EC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88320EC-ASR Tags
-
ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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