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Skyworks Solutions Inc. SI88620EC-ISR
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- Part No.:
- SI88620EC-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88620EC-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,741
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Product details
Overview
SI88620EC-ISR from Skyworks Solutions is a dual-channel digital isolator with integrated isolated DC-DC converter, designed for high-voltage-to-low-voltage conversion (e.g., 24 V input to 5 V isolated output), delivering up to 2 W average output power, supporting 100 Mbps data rate, and providing 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 SI88620EC-ISR datasheet, SI88620EC-ISR pinout, SI88620EC-ISR application, or SI88620EC-ISR equivalent, key selection criteria include its external-FET–driven flyback topology, programmable soft-start and switching frequency, AEC-Q100 qualification, and SOIC-20 wide-body package with reinforced insulation certified to UL, VDE, and CQC standards.
Technical Context
The SI88620EC-ISR implements a modified isolated flyback DC-DC controller with external primary-side NMOS switch (driven by ESW), current sensing via RSN, and secondary-side voltage feedback through VSNS. Its RF-based digital isolation uses on/off keying across a silicon dioxide barrier, enabling 18 ns typical propagation delay and 100 kV/µs transient immunity.
This variant belongs to the Si8862x family optimized for high-input-voltage operation (up to 24 V), requiring VDDA ≤ 5.5 V and supporting VREGB-referenced external regulation for outputs > 5.5 V. It features externally adjustable soft-start (SS pin) and frequency control (SH_FC pin), with Type 1 loop compensation at COMP using 100 kΩ + capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute - meets reinforced insulation requirements per UL 1577, VDE 62368-1, and CQC GB4943.1. |
| Data Rate | Up to 100 Mbps - supports high-speed serial interfaces such as SPI, RS-485 transceiver control, and PWM feedback in real-time motor control. |
| Propagation Delay | 18 ns typical - enables precise timing alignment between isolated control and power stages in inverters and servo drives. |
| DC-DC Output Power | 2 W average at 5 V - sufficient to power isolated gate drivers, ADC references, and microcontroller peripherals without external regulators. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient environments. |
| Transient Immunity | 100 kV/µs (typical) - ensures robust operation in noisy power electronics systems with fast-switching SiC/GaN devices. |
| AEC-Q100 Grade | Qualified per AEC-Q100 Rev G - supports automotive applications including battery management and traction inverter subsystems. |
Pinout & Package
SI88620EC-ISR 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 5000 VRMS working voltage.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 15, 16, 17, 18 | GNDP, VDDP, RSN, ESW, VREGA, GNDA, VDDA, SH_FC, SS, NC | Primary-side DC-DC and signal interface: GNDP/VDDP power ground/supply; RSN senses peak current; ESW drives external FET; VREGA supplies bias for external NPN regulator; SH_FC controls switching frequency; SS sets soft-start time constant. |
| 7, 8, 9, 10, 11, 12, 13, 14, 19, 20 | GNDB, VDDB, VSNS, COMP, A1, A2, B1, B2, NC, NC | Secondary-side DC-DC and isolation channels: GNDB/VDDB isolated ground/power; VSNS feeds back output voltage divider; COMP accepts Type 1 compensation network (100 kΩ + cap); A1/A2/B1/B2 are unidirectional CMOS I/O channels (2 forward, 2 reverse). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated flyback DC-DC controller | Supports 24 V → 5 V conversion with external FET, eliminating need for separate isolated DC-DC module and reducing BOM count by ≥3 components. |
| Programmable soft-start | Capacitor-connected SS pin enables user-defined inrush current limiting-critical for reliability in high-capacitance gate-drive loads. |
| External frequency control | SH_FC pin allows adjustment of PWM frequency from 200 kHz to 800 kHz-enabling EMI optimization and transformer size reduction. |
| Secondary-side voltage sensing | VSNS feedback eliminates optocoupler and bias circuitry-improving line/load regulation accuracy and long-term stability over temperature. |
| RF-based digital isolation | On/off keying architecture delivers 100 kV/µs CMTI and 18 ns prop delay-superior noise immunity vs. capacitive or magnetic isolators in high-dV/dt environments. |
Applications
| Industrial Motor Drive | Automotive Traction Inverter |
|---|---|
Use Scenario: Isolating PWM gate signals and current-sense feedback between MCU and SiC half-bridge modules in variable-frequency drives. IC Role / Device Role / Timing Role: SI88620EC-ISR provides dual-channel signal isolation plus local 5 V supply for gate drivers, replacing discrete isolators + isolated DC-DC. Use Value: Enables <18 ns timing skew between channel pairs and withstands 100 kV/µs transients during 100 A/µs switching events. |
Use Scenario: Providing isolated power and control signals to IGBT/SiC gate drivers in electric vehicle main inverter units. IC Role / Device Role / Timing Role: SI88620EC-ISR acts as AEC-Q100-qualified isolated power + signal hub for phase-leg control, meeting ASIL-B functional safety requirements. Use Value: Delivers 2 W isolated 5 V rail and 100 Mbps communication while maintaining 5000 VRMS reinforced insulation across 125 °C operating range. |
| Isolated Data Acquisition | PLC Digital I/O Module |
Use Scenario: Isolating analog front-end ADC/DAC control lines and powering isolated sensor signal conditioning in high-noise factory-floor environments. IC Role / Device Role / Timing Role: SI88620EC-ISR supplies clean 5 V to isolated op-amps and buffers while transmitting configuration and status data across the barrier. Use Value: Eliminates ground loops and common-mode noise pickup, achieving >80 dB CMRR at 1 MHz due to 100 kV/µs CMTI performance. |
Use Scenario: Providing channel-level isolation and local power for 24 V digital input/output cards in distributed control systems. IC Role / Device Role / Timing Role: SI88620EC-ISR replaces optocoupler + DC-DC combos per I/O pair, enabling compact 16-channel modules with unified supply architecture. Use Value: Reduces PCB area by 40% versus discrete solutions and supports hot-swap detection via precise UVLO thresholds on both sides. |
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 switches (no external FET required); lower max output power (0.5 W); fixed 250 kHz frequency; no soft-start or frequency control. | Better suited for low-power logic-level isolation where external transformer driver capability is unnecessary. | Select ADUM6210ARWZ when board space is constrained and output load ≤ 100 mA at 5 V. |
| ISO7821FDWWR | No integrated DC-DC; requires external isolated power supply; higher data rate (200 Mbps); lower prop delay (11 ns); 8000 VRMS isolation rating. | Preferred for ultra-high-speed deterministic communication where local power must be sourced separately. | Choose ISO7821FDWWR when system already includes an isolated DC-DC rail and timing-critical SPI/CAN FD links demand sub-12 ns skew. |
Compared with ADUM6210ARWZ and ISO7821FDWWR, SI88620EC-ISR uniquely combines external-FET–driven 24 V input capability, programmable soft-start/frequency, and AEC-Q100 qualification-making it the only option among the three that supports scalable 2 W isolated power in automotive-grade high-voltage systems.
Availability
SI88620EC-ISR is available at Aetrix Electronics and suitable for industrial motor control, automotive traction inverters, and PLC digital I/O modules requiring stable component supply with automotive-grade reliability and long-term lifecycle support.
Supply support for SI88620EC-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 Si8862x product line was engineered specifically for high-input-voltage isolated power and signal transfer in automotive and industrial systems-emphasizing AEC-Q100 compliance, programmable DC-DC control, and robust RF isolation in SOIC-20 wide-body packaging.
FAQ
What is the maximum input voltage supported by the SI88620EC-ISR DC-DC converter?
The SI88620EC-ISR is designed for high-voltage-to-low-voltage configurations, supporting up to 24 V DC on the primary side. Its ESW pin drives an external NMOS FET, and RSN provides current sensing-enabling safe operation at 24 V input while delivering regulated 3.3 V or 5.0 V on the isolated side. Input voltages above 5.5 V require use of VREGA for VDDA biasing.
Does the SI88620EC-ISR support both forward and reverse digital isolation channels?
Yes, the SI88620EC-ISR provides two unidirectional digital isolation channels: A1→B1 and A2→B2 are forward channels; B1→A1 and B2→A2 are reverse channels. This bidirectional capability is implemented via dedicated HF XMTR/RCVR circuitry per channel, enabling full-duplex control signaling in applications like isolated UART or SPI bus extension.
What transformer specifications are validated for use with the SI88620EC-ISR?
Skyworks validates transformers including UMEC UTB02250s (7–24 V input, 3.3–5.5 V output, 3.0:1 turns ratio, 5 kVRMS isolation) and Coilcraft TA7788-AL (12 V input, 5/15 V output, multi-winding, 5 kVRMS). These meet leakage inductance (<600 nH), primary inductance (25 µH ±5%), and isolation rating requirements specified in AN901 for Si8862x designs.
How is soft-start configured on the SI88620EC-ISR?
Soft-start is configured using an external capacitor connected to the SS pin. The SI88620EC-ISR's internal timer charges this capacitor to control ramp-up of the DC-DC converter's duty cycle-limiting inrush current into output capacitance. Typical values range from 1 nF to 100 nF, with larger values extending startup time for high-capacitance loads like gate-driver rails.
Is the SI88620EC-ISR pin-compatible with other Si8862x variants such as SI88621EC-ISR?
No, SI88620EC-ISR is not pin-compatible with SI88621EC-ISR or SI88622EC-ISR. While all share the SOIC-20 wide-body package and core pin functions (e.g., ESW, VSNS, COMP), channel directionality differs: SI88620EC-ISR has two forward and two reverse channels (A1→B1, A2→B2, B1→A1, B2→A2), whereas SI88621EC-ISR configures all four as forward-only. Pin mapping and functional allocation are distinct per variant.
SI88620EC-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
SI88620EC-ISR FAQ
1.How can I place an order for SI88620EC-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88620EC-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 SI88620EC-ISR reliable?
The price and inventory of SI88620EC-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88620EC-ISR is usually 5 days.
3.What payment methods are accepted for SI88620EC-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88620EC-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88620EC-ISR?
SI88620EC-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88620EC-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 SI88620EC-ISR?
For technical support, including SI88620EC-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88620EC-ISR requirements.
6.How does Aetrix verify that SI88620EC-ISR is sourced from the original manufacturer or authorized distributors?
All SI88620EC-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 SI88620EC-ISR meets industry standards.
7.What is the process for return or replacement of SI88620EC-ISR?
All SI88620EC-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI88620EC-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 SI88620EC-ISR part is unused and in its original packaging.
Return procedure for SI88620EC-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88620EC-ISR Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7741DWR
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ISO7741FDWR
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