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Skyworks Solutions Inc. SI88220BC-ISR
- Part No.:
- SI88220BC-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88220BC-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,738
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Product details
Overview
SI88220BC-ISR from Skyworks Solutions is a dual-channel digital isolator with integrated isolated DC-DC converter, delivering up to 5 W peak output power at 3.3 V or 5.0 V, supporting data rates up to 100 Mbps, propagation delay ≤23 ns, and 5000 VRMS isolation. It serves as a self-powered signal isolator in industrial motor control and EV inverter gate drive circuits.
For engineers reviewing the SI88220BC-ISR datasheet, SI88220BC-ISR pinout, SI88220BC-ISR application, or SI88220BC-ISR equivalent, this page provides verified technical context, SOIC-16 wide-body package mapping, confirmed dual unidirectional channel architecture, isolated power delivery specs, and two validated alternative parts for automotive-grade isolated power + signal transfer designs.
Technical Context
The SI88220BC-ISR implements RF-based on/off keying modulation across a silicon dioxide capacitive barrier for robust noise immunity and magnetic field rejection. Its integrated flyback DC-DC controller operates in peak current mode with closed-loop secondary-side voltage sensing via VSNS and internal error encoding across the isolation barrier.
It features user-programmable soft-start (SS pin), shutdown control (SH pin), and fixed 250 kHz switching frequency. The device supports low-voltage input (3–5.5 V) to isolated 3/5 V output configurations and requires only an external transformer, Schottky diode, and minimal passive components for full operation.
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, and VDE 62368-1. |
| Data Rate | Up to 100 Mbps - enables high-speed serial interface isolation (e.g., SPI, RS-485, CAN FD physical layer). |
| Propagation Delay | ≤23 ns max - ensures tight timing alignment in real-time control loops like motor phase commutation. |
| DC-DC Output Power | Up to 5 W peak - powers isolated gate drivers, ADCs, or microcontrollers without external isolated supply. |
| Operating Temp | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments. |
| Transient Immunity | 100 kV/µs typical - withstands fast-rising common-mode transients in inverter switching nodes. |
| AEC-Q100 Grade | Qualified - supports automotive functional safety applications requiring robustness and PPAP documentation. |
Pinout & Package
SI88220BC-ISR is housed in a RoHS-compliant SOIC-16 wide-body package (10.3 mm × 10.3 mm, 1.27 mm pitch) with creepage/clearance ≥8.3 mm, rated for reinforced insulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GNDP | Primary-side power ground | Return path for internal primary switch and VDDP; must be short-traced to VDDP bypass capacitor. |
| 2 VSW | Internal switch output | Drives transformer primary; connects directly to transformer primary winding and snubber network. |
| 3 VDDP | Primary-side power supply | Input for DC-DC controller (3–5.5 V); requires local 10 µF ceramic bypass capacitor. |
| 4 VDDA | Primary-side signal supply | Powers A1/A2 digital inputs; decoupled separately from VDDP to minimize coupling noise. |
| 5 GNDA | Primary-side signal ground | Reference for A1/A2 I/O; isolated from GNDP by internal barrier; connected to system logic ground. |
| 6 SH | Shutdown control | Active-high disable of DC-DC converter; tie to GND for normal operation; enables safe power sequencing. |
| 7 GNDB | Secondary-side signal ground | Reference for B1/B2 outputs; forms isolated domain with VDDB; must not connect to GNDA or GNDP. |
| 8 VDDB | Secondary-side signal supply | Powered by internal DC-DC; supplies B1/B2 outputs and external isolated loads up to 2 W average. |
| 9 VSNS | Feedback sense input | Monitors isolated output voltage via resistor divider; sets VOUT precision (±1.5% typical regulation). |
| 10 COMP | Compensation node | Connects external R-C network (49.9 kΩ + capacitor) to stabilize DC-DC control loop bandwidth. |
| 11 NC | No connect | Not bonded; leave floating; no PCB trace or pad required. |
| 12 A1 | Primary-side input channel 1 | Unidirectional CMOS input driving HF XMTR; compatible with 3.3 V/5 V logic levels. |
| 13 A2 | Primary-side input channel 2 | Unidirectional CMOS input driving second HF XMTR; independent timing from A1. |
| 14 B1 | Secondary-side output channel 1 | Unidirectional CMOS output from HF RCVR; drives isolated MCU GPIO or gate driver enable. |
| 15 B2 | Secondary-side output channel 2 | Unidirectional CMOS output from second HF RCVR; supports dual feedback or status signaling. |
| 16 HF | High-frequency carrier node | Internal RF oscillator node; not user-accessible; critical for EMI control via layout shielding. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC with secondary-side sensing | Eliminates optocoupler-based feedback, improving line/load regulation (<±1.5%) and reliability over lifetime. |
| RF on/off keying isolation | Provides superior CMTI (100 kV/µs) and magnetic immunity vs. pulse-width or capacitive schemes. |
| Programmable soft-start (SS) | Controls inrush current during power-up using external capacitor; prevents transformer saturation. |
| Shutdown control (SH) | Allows system-level power management by disabling DC-DC output while preserving isolation integrity. |
| SOIC-16 wide-body package | Meets 8.3 mm creepage/clearance for reinforced insulation; compatible with standard SMT reflow profiles. |
| AEC-Q100 qualification | Validated for automotive use with IMDS/CAMDS support, AIAG-compliant PPAP, and zero-defect manufacturing flow. |
Applications
| Industrial Motor Control | EV Inverter Gate Drive |
|---|---|
Use Scenario: Isolating PWM signals and fault feedback between MCU and 3-phase IGBT/SiC gate drivers in variable-frequency drives. IC Role / Device Role / Timing Role: Dual-channel isolator providing independent forward (A→B) and reverse (B→A) signal paths with <23 ns propagation delay for synchronized switching. Use Value: Enables precise dead-time control and fast overcurrent response (<100 ns fault reporting) without external isolated power rails. |
Use Scenario: Providing isolated power and signal transfer for half-bridge gate drivers in traction inverters operating at 800 V DC bus. IC Role / Device Role / Timing Role: Self-powered isolator delivering regulated 5 V to isolated gate driver ICs while transmitting PWM and DESAT feedback across 5 kVRMS barrier. Use Value: Reduces BOM count by eliminating discrete isolated DC-DC modules and optocouplers; supports ASIL-B functional safety decomposition. |
| PLC Digital I/O Modules | Isolated Data Acquisition |
Use Scenario: Galvanically isolating 24 V digital input/output channels in programmable logic controllers for factory automation. IC Role / Device Role / Timing Role: Dual-channel isolator with integrated 5 V DC-DC powering downstream level-shifters and protection circuitry on field side. Use Value: Simplifies field-side power design; eliminates need for separate isolated 5 V rail; maintains >100 kV/µs transient immunity against industrial noise. |
Use Scenario: Isolating analog front-end ADCs and sensor interfaces in high-voltage battery monitoring systems. IC Role / Device Role / Timing Role: Signal isolator transferring conversion ready strobes and data valid signals while powering isolated ADC reference buffers. Use Value: Prevents ground loop errors and noise injection into precision measurement paths; supports ±0.1% accuracy over temperature. |
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; lower power, no programmable soft-start or shutdown. | Suitable for low-power sensor interfaces but insufficient for gate driver biasing or high-current loads. | Select when isolated power demand is <0.5 W and AEC-Q100 is not required. |
| ISO7821FDWR | 2-channel isolator only - no integrated DC-DC; requires external isolated supply (e.g., ISOW7841). | Offers higher data rate (100 Mbps) and lower propagation delay (11 ns), but increases system complexity and component count. | Select when maximum timing precision is critical and board space allows separate isolated power solution. |
Compared with ADUM6210ARWZ and ISO7821FDWR, SI88220BC-ISR uniquely combines 5 W peak isolated power, AEC-Q100 qualification, and programmable DC-DC control in a single SOIC-16 package - enabling compact, automotive-grade inverter and motor control designs without external power conversion stages.
Availability
SI88220BC-ISR is available at Aetrix Electronics and suitable for industrial motor control, EV inverter gate drive, and PLC digital I/O modules requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for SI88220BC-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-reliability applications.
The Si88x2x family was designed specifically for self-powered isolated signal transfer in harsh environments - targeting automotive traction inverters, industrial servo drives, and energy infrastructure where integrated isolated power and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum continuous output power capability of the SI88220BC-ISR's integrated DC-DC converter?
The SI88220BC-ISR supports up to 5 W peak isolated output power, with 2 W average output power at 5.0 V. This is sufficient to power isolated gate drivers, ADCs, and microcontrollers in motor control and EV inverter applications. The actual sustained load depends on thermal design and ambient conditions, but the device maintains regulation within ±1.5% across its full load range. SI88220BC-ISR achieves this using secondary-side voltage sensing and internal error encoding across the isolation barrier.
Does the SI88220BC-ISR support programmable switching frequency for EMI reduction?
No - the SI88220BC-ISR uses a fixed 250 kHz switching frequency for its internal DC-DC controller. Programmable frequency is available only on Si883xx and Si886xx variants via the SH_FC and SS pins. SI88220BC-ISR instead provides dithering and soft-start (SS pin) to reduce conducted and radiated emissions. These features, combined with RF-based isolation, ensure compliance with CISPR 25 Class 5 in automotive applications. SI88220BC-ISR does not require external frequency-setting components.
Can the SI88220BC-ISR be used in high-voltage input configurations (e.g., 24 V primary)?
No - the SI88220BC-ISR is designed exclusively for low-voltage input (3–5.5 V) to isolated 3/5 V output. For 24 V input applications, Skyworks specifies Si884xx or Si886xx families, which feature external switch drivers (ESW), current sense (RSN), and VREGA/VREGB pins. Attempting to apply 24 V to SI88220BC-ISR's VDDP will exceed absolute maximum ratings and cause permanent damage. SI88220BC-ISR must be powered from a pre-regulated 3.3 V or 5.0 V supply.
What is the purpose of the HF pin on the SI88220BC-ISR, and should it be connected externally?
The HF pin is an internal high-frequency carrier node used for RF modulation across the isolation barrier and is not intended for external connection. It is not bonded to the package lead and must remain unconnected on the PCB. Routing traces or placing components near HF may degrade EMI performance or cause coupling into adjacent signals. SI88220BC-ISR relies on internal RF generation, and the HF pin serves only for internal test and characterization - no external circuitry should interface with it.
How does the SI88220BC-ISR handle undervoltage lockout (UVLO) on both sides of the isolation barrier?
SI88220BC-ISR implements independent UVLO monitors on VDDA (primary) and VDDB (secondary). Side A enters UVLO when VDDA falls below 2.7 V and exits above 2.9 V; Side B follows the same thresholds on VDDB. Outputs remain latched low during UVLO, preventing glitch propagation. This dual-threshold behavior ensures clean startup sequencing and avoids metastability during brownout events. SI88220BC-ISR maintains isolation integrity even if one side is unpowered while the other remains active.
SI88220BC-ISR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SI88220BC-ISR FAQ
1.How can I place an order for SI88220BC-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88220BC-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 SI88220BC-ISR reliable?
The price and inventory of SI88220BC-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88220BC-ISR is usually 5 days.
3.What payment methods are accepted for SI88220BC-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88220BC-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88220BC-ISR?
SI88220BC-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88220BC-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 SI88220BC-ISR?
For technical support, including SI88220BC-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88220BC-ISR requirements.
6.How does Aetrix verify that SI88220BC-ISR is sourced from the original manufacturer or authorized distributors?
All SI88220BC-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 SI88220BC-ISR meets industry standards.
7.What is the process for return or replacement of SI88220BC-ISR?
All SI88220BC-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI88220BC-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 SI88220BC-ISR part is unused and in its original packaging.
Return procedure for SI88220BC-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88220BC-ISR Tags
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7741DWR
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ISO7741FDWR
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