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Skyworks Solutions Inc. SI88620BC-ISR
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- Part No.:
- SI88620BC-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88620BC-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,705
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Product details
Overview
SI88620BC-ISR 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 on the secondary side. It features two unidirectional CMOS isolation channels (A1/A2 → B1/B2), 100 Mbps data rate, 23 ns max propagation delay, and 5000 VRMS reinforced isolation. Used in industrial inverters and automotive motor control where compact isolated power + signal integrity are critical.
For engineers reviewing the SI88620BC-ISR datasheet, SI88620BC-ISR pinout, SI88620BC-ISR application, or SI88620BC-ISR equivalent, this page delivers verified specifications, SOIC-20W package mapping, functional pin roles, automotive-grade AEC-Q100 qualification, and real-world design context for high-voltage DC-DC conversion with digital isolation.
Technical Context
The SI88620BC-ISR implements a modified flyback DC-DC controller with external NMOS switch drive (ESW pin), primary-side current sensing (RSN), and secondary-side voltage feedback (VSNS). Its RF-based digital isolation uses on/off keying across a silicon dioxide barrier, enabling robust noise immunity and no startup initialization.
This variant belongs to the Si8862x family optimized for high-voltage-to-low-voltage conversion (e.g., 24 V input to 3.3/5 V isolated output), requiring external transformer, rectifier, and loop compensation (RCOMP = 100 kΩ, CCOMP calculated per crossover frequency). It supports programmable soft-start (SS pin) and shutdown (SH_FC pin), but lacks internal power switches - all switching is externally controlled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute (UL 1577, VDE 62368-1, CSA 62368-1) |
| Data Rate | Up to 100 Mbps - supports high-speed serial interfaces like SPI, RS-485 transceiver control, and PWM feedback loops |
| Propagation Delay | 23 ns max - enables tight timing control in motor gate drivers and real-time protection circuits |
| DC-DC Output Power | 2 W average at 5 V - sufficient to power secondary-side microcontrollers, ADCs, or isolated gate drivers without auxiliary supply |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions |
| AEC-Q100 Grade | Qualified to Grade 1 - meets automotive reliability requirements for powertrain and chassis systems |
| Transient Immunity | 100 kV/µs (typical) - withstands fast EFT/burst events in noisy industrial environments |
Pinout & Package
SI88620BC-ISR is housed in a RoHS-compliant SOIC-20 wide-body package (10.3 mm × 15.4 mm, 1.27 mm pitch), rated for 5000 VRMS isolation and creepage/clearance ≥8.3 mm.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 18, 20 | GNDP, RSN, ESW, VDDA, GNDA, VREGA, GNDP, RSN | Primary-side ground, current sense input, external switch driver, primary logic supply, primary signal ground, internal voltage reference output - enables 24 V input operation with external FET |
| 7, 8, 14, 13 | NC, SH_FC, SS, NC | No-connect, shutdown/frequency control input, soft-start timing capacitor connection - allows safe power sequencing and EMI optimization |
| 9, 10, 12, 11 | A1, A2, B1, B2 | Unidirectional digital channel inputs (A-side) and outputs (B-side) - supports forward/reverse isolation paths for bidirectional protocols |
| 15, 16, 17, 19 | GNDB, VDDB, VSNS, COMP | Secondary-side ground, isolated logic supply, feedback voltage sense, compensation network node - completes closed-loop regulation without optocouplers |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC controller with external switch drive | Enables 24 V primary-to-5 V isolated conversion using low-cost discrete FETs and Schottky diodes - eliminates need for separate isolated DC-DC module |
| Secondary-side voltage sensing (VSNS) | Delivers superior line/load regulation (<±1.5%) without optocoupler bias circuitry - reduces component count and improves long-term stability |
| Programmable soft-start (SS) and shutdown (SH_FC) | Prevents inrush current and allows system-level power sequencing - essential for automotive ASIL-B compliant designs |
| RF-based capacitive isolation | Provides 100 kV/µs CMTI and >100-year lifetime MTTF - exceeds requirements for IEC 61800-5-1 motor drives and ISO 26262 power electronics |
| AEC-Q100 Grade 1 qualification | Validated for automotive use with PPAP support, IMDS/CAMDS compliance, and zero-defect manufacturing flow - suitable for EPS, battery management, and inverter control |
Applications
| Industrial Inverters | Automotive Motor Control |
|---|---|
Use Scenario: Isolated gate driving and current sensing feedback in 3-phase IGBT/SiC inverter stages operating at 600–1200 V bus voltage. IC Role / Device Role / Timing Role: SI88620BC-ISR provides galvanically isolated PWM signals to gate drivers while powering them via its integrated 5 V/2 W DC-DC output. Use Value: Eliminates separate isolated bias supply, reduces PCB area by >30%, and maintains <23 ns channel-to-channel skew for precise phase timing. |
Use Scenario: Traction inverter control unit in hybrid electric vehicles requiring ASIL-B compliant isolation for MCU-to-gate-driver communication. IC Role / Device Role / Timing Role: SI88620BC-ISR serves as the safety-critical isolation interface between the main MCU and isolated gate drivers, with AEC-Q100 validated reliability. Use Value: Meets ISO 26262 hardware metrics (FIT <10) and supports diagnostic coverage via UVLO monitoring on both sides. |
| Isolated Data Acquisition | PLC Digital I/O Modules |
Use Scenario: High-precision current/voltage measurement in factory automation systems with 1000 V common-mode transients. IC Role / Device Role / Timing Role: SI88620BC-ISR isolates analog front-end SPI bus lines while powering isolated ADCs and reference buffers from its 3.3 V DC-DC output. Use Value: Achieves >100 dB SNR retention across isolation barrier and sustains 100 Mbps throughput for multi-channel synchronized sampling. |
Use Scenario: DIN-rail mounted PLC modules interfacing with 24 V field sensors/actuators in harsh industrial environments. IC Role / Device Role / Timing Role: SI88620BC-ISR provides channelized digital isolation for discrete input/output signals and powers isolated level translators from its secondary supply. Use Value: Supports 100 kV/µs transient immunity per IEC 61000-4-4, enabling reliable operation in electrically noisy factory floors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel isolated DC-DC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM6210ARWZ | Integrated internal power switches; 500 mW max output; SOIC-16W package; no programmable frequency or soft-start | Better suited for low-power, space-constrained applications where external FETs are undesirable | Choose ADUM6210ARWZ when board area is critical and output power ≤500 mW suffices |
| ISO7821FDWWR | No integrated DC-DC; requires external isolated supply; 100 Mbps; 25 kV/µs CMTI; SOIC-16W | Used where isolated power is already available (e.g., from separate DC-DC module) and only signal isolation is needed | Choose ISO7821FDWWR when system-level power architecture separates isolation and regulation functions |
Compared with ADUM6210ARWZ and ISO7821FDWWR, SI88620BC-ISR uniquely combines 2 W isolated power delivery, AEC-Q100 qualification, programmable soft-start/shutdown, and 24 V input capability - making it optimal for automotive and industrial systems needing self-contained, high-reliability isolation with embedded power conversion.
Availability
SI88620BC-ISR is available at Aetrix Electronics and suitable for industrial inverters, automotive motor control, isolated data acquisition, and PLC digital I/O modules requiring stable component supply across extended temperature and high-reliability lifecycles.
Supply support for SI88620BC-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 Si88xx family was designed specifically for high-reliability industrial and automotive applications demanding integrated signal isolation plus isolated power - eliminating external DC-DC modules while meeting stringent safety certifications.
FAQ
What is the maximum isolated output power supported by the SI88620BC-ISR?
The SI88620BC-ISR supports up to 2 W of average isolated output power at 5 V, delivered via its secondary-side VDDB supply. This is achieved using an external NMOS power switch driven by the ESW pin, with feedback regulation through the VSNS pin. Peak power capability depends on transformer selection and thermal design, but continuous operation is rated at 2 W under full load and 125 °C junction temperature.
Does the SI88620BC-ISR include internal power switches for the DC-DC converter?
No, the SI88620BC-ISR does not include internal power switches. It is part of the Si8862x series designed for high-voltage input configurations (e.g., 24 V primary), requiring an external NMOS transistor driven by the ESW pin. This architecture enables higher efficiency and thermal flexibility compared to integrated-switch variants like Si8822x/Si8832x.
What isolation certifications apply to the SI88620BC-ISR?
The SI88620BC-ISR is certified to UL 1577 (5000 VRMS, 1 min), VDE EN 62368-1 (reinforced insulation), CSA C22.2 No. 62368-1, and CQC GB4943.1. It also meets IEC 60747-17 basic insulation requirements (pending final validation). These approvals confirm suitability for safety-critical applications in industrial and automotive end equipment.
Can the SI88620BC-ISR be used for 24 V to 24 V isolated DC-DC conversion?
Yes, the SI88620BC-ISR supports high-voltage-to-high-voltage conversion (e.g., 24 V input to 24 V isolated output) using an external transformer with appropriate turns ratio and an external rectifier/regulator stage on the secondary side. The VSNS feedback loop must be configured to sense the 24 V output, and VREGB may be used as a reference if output exceeds 5.5 V.
What is the role of the RSN pin on the SI88620BC-ISR?
The RSN (Current Sense) pin on the SI88620BC-ISR provides primary-side peak current sensing for the external NMOS switch. It connects to a shunt resistor between the switch source and ground, enabling cycle-by-cycle current limiting and overcurrent protection. This function is essential for stable operation in high-input-voltage flyback topologies and is required for proper DC-DC controller operation.
SI88620BC-ISR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 20-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:
- 20-SOIC
SI88620BC-ISR FAQ
1.How can I place an order for SI88620BC-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88620BC-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 SI88620BC-ISR reliable?
The price and inventory of SI88620BC-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88620BC-ISR is usually 5 days.
3.What payment methods are accepted for SI88620BC-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88620BC-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88620BC-ISR?
SI88620BC-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88620BC-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 SI88620BC-ISR?
For technical support, including SI88620BC-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88620BC-ISR requirements.
6.How does Aetrix verify that SI88620BC-ISR is sourced from the original manufacturer or authorized distributors?
All SI88620BC-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 SI88620BC-ISR meets industry standards.
7.What is the process for return or replacement of SI88620BC-ISR?
All SI88620BC-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI88620BC-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 SI88620BC-ISR part is unused and in its original packaging.
Return procedure for SI88620BC-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88620BC-ISR Tags
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ISO6721BDR
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SI8710AC-B-ISR
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ISO6741FQDWRQ1
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ISO7741DWR
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ISO7741FDWR
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