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Skyworks Solutions Inc. SI88620BC-ASR
- Part No.:
- SI88620BC-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88620BC-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:3,626
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Product details
Overview
SI88620BC-ASR 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), supporting up to 2 W average output power, 5000 VRMS isolation rating, and 100 Mbps data rate. It serves as a complete signal + power isolation solution in motor control gate drivers and industrial PLC I/O modules.
For engineers reviewing the SI88620BC-ASR datasheet, SI88620BC-ASR pinout, SI88620BC-ASR application, or SI88620BC-ASR equivalent, this device delivers verified AEC-Q100 qualified performance, programmable soft-start and switching frequency, external transformer driver (ESW), and secondary-side voltage sensing (VSNS) - critical for automotive and industrial isolated power + signal integrity design.
Technical Context
The SI88620BC-ASR implements RF-based capacitive digital isolation across two unidirectional channels (A1/A2 → B1/B2), using on/off keying modulation for superior EMI immunity and 18 ns typical propagation delay. Its isolated DC-DC converter uses peak current mode control with closed-loop feedback via VSNS/COMP pins and supports external NMOS switch drive via ESW and current sensing via RSN.
This variant belongs to the Si8862x family optimized for high-voltage primary-side operation (up to 24 V), requiring external FET Q1 and sense resistor R4. It features programmable soft-start (SS pin), shutdown/frequency control (SH_FC pin), and internal voltage reference VREGA for biasing primary-side circuitry when VDDA < 5.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute - enables reinforced insulation per UL 1577, CSA 62368-1, and VDE 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 | 18 ns typical - ensures tight timing alignment between isolated control and feedback signals in motor drives. |
| DC-DC Output Power | 2 W average at 5 V - sufficient to power secondary-side microcontrollers, gate drivers, and analog front-ends without external regulators. |
| Operating Temperature | –40 °C to +125 °C - validated for under-hood automotive and industrial ambient conditions. |
| Transient Immunity | 100 kV/µs (typical) - maintains signal integrity during fast-switching events in inverters and power converters. |
| AEC-Q100 Grade | Qualified - meets automotive reliability requirements including temperature cycling, HTOL, and ESD. |
Pinout & Package
SI88620BC-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, certified for reinforced insulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GNDP | Primary-side power ground | Reference for VDDP, ESW, RSN; must be low-inductance connected to primary ground plane. |
| 2 RSN | Current sense input | Monitors primary-side switch current for overcurrent protection and cycle skipping control. |
| 3 ESW | External switch driver | Drives gate of external NMOS Q1; supports >5.5 V primary-side operation (e.g., 24 V input). |
| 4 VDDA | Primary-side signal supply | Must be ≤ 5.5 V; powered via external LDO or VREGA + NPN if primary rail exceeds 5.5 V. |
| 5 GNDA | Primary-side signal ground | Reference for A1/A2 inputs and VDDA; separate from GNDP but tied at single point. |
| 6 VREGA | Voltage reference output | Zener-referenced output used with external NPN to generate regulated VDDA when Vin > 5.5 V. |
| 7 NC | No connect | Not bonded; leave floating or grounded per layout best practices. |
| 8 SH_FC | Shutdown / frequency control | High = DC-DC shutdown; RC network with SS sets switching frequency (200–800 kHz). |
| 9 A1 | Primary-side input channel 1 | Unidirectional CMOS input driving isolated B1 output; compatible with 1.8–5.5 V logic. |
| 10 A2 | Primary-side input channel 2 | Unidirectional CMOS input driving isolated B2 output; independent timing and fail-safe behavior. |
| 11 B1 | Secondary-side output channel 1 | Isolated CMOS output referenced to VDDB; driven by A1 with 18 ns typical prop delay. |
| 12 B2 | Secondary-side output channel 2 | Isolated CMOS output referenced to VDDB; driven by A2 with independent UVLO monitoring. |
| 13 GNDB | Secondary-side signal ground | Reference for VDDB, B1/B2 outputs, and VSNS/COMP feedback loop. |
| 14 VDDB | Secondary-side signal supply | Powered by internal DC-DC; supplies isolated logic and can deliver up to 2 W to external loads. |
| 15 NC | No connect | Not bonded; leave floating or grounded. |
| 16 VSNS | Feedback voltage sense | Connects to resistor divider on secondary side to set regulated VDDB output voltage (e.g., 5 V). |
| 17 COMP | Compensation node | RC network (RCOMP = 100 kΩ + CCOMP) sets loop stability for peak current mode DC-DC control. |
| 18 NC | No connect | Not bonded; leave floating or grounded. |
| 19 SS | Soft-start capacitor | External capacitor sets startup ramp time to limit inrush current into VDDB and external loads. |
| 20 NC | No connect | Not bonded; leave floating or grounded. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC with external FET support | Enables 24 V → 5 V conversion using ESW/RSN interface and external NMOS Q1, eliminating need for discrete flyback controller. |
| Secondary-side voltage sensing | VSNS pin enables precise regulation of VDDB without optocouplers, improving line/load regulation and reducing component count. |
| Programmable soft-start & shutdown | SS and SH_FC pins allow user-defined startup timing and system-level power sequencing control in safety-critical applications. |
| AEC-Q100 qualification | Validated for automotive use including temperature cycling, HTOL, and ESD - supports PPAP documentation and IMDS reporting. |
| RF-based capacitive isolation | On/off keying modulation provides 100 kV/µs transient immunity and immunity to magnetic fields, outperforming opto- and transformer-based isolators. |
Applications
| Motor Control Gate Driver | Automotive Battery Management System |
|---|---|
Use Scenario: Isolating PWM signals and fault feedback between MCU and high-side IGBT/MOSFET drivers in 400 V traction inverters. IC Role / Device Role / Timing Role: SI88620BC-ASR provides dual-channel signal isolation plus 5 V isolated supply for gate driver ICs, with 18 ns prop delay enabling precise dead-time control. Use Value: Eliminates external isolated DC-DC module and optocouplers, reducing BOM count by ≥4 components while meeting ASIL-B functional safety requirements. |
Use Scenario: Isolating cell voltage monitoring and balancing signals between battery monitor ICs and MCU in EV pack management units. IC Role / Device Role / Timing Role: SI88620BC-ASR delivers reinforced isolation (5000 VRMS) and AEC-Q100 qualification, powering isolated ADCs and transmitting sampled data at 100 Mbps. Use Value: Enables direct integration of isolated power + data in compact BMS modules, avoiding thermal derating issues associated with optocoupler-based solutions. |
| Industrial PLC Digital I/O Module | Isolated Industrial Ethernet Node |
Use Scenario: Providing isolated 24 V input sensing and 24 V output switching in DIN-rail mounted PLC backplanes. IC Role / Device Role / Timing Role: SI88620BC-ASR powers isolated input buffers and output drivers via its 2 W DC-DC, while A1/A2 and B1/B2 handle status and command signals. Use Value: Supports 3000+ hour MTBF at 125 °C ambient, exceeding IEC 61000-4-5 surge immunity requirements for factory floor deployment. |
Use Scenario: Isolating PHY interface and MAC control lines in PROFINET or EtherCAT slave nodes with integrated isolated power. IC Role / Device Role / Timing Role: SI88620BC-ASR supplies isolated 3.3 V/5 V to Ethernet PHY and relays link status/interrupt signals with sub-20 ns timing fidelity. Use Value: Meets EN 55032 Class B emissions limits without external filtering due to dithered switching and integrated EMI suppression. |
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 | Single-channel isolator + 500 mW DC-DC; SOIC-16; no ESW/RSN; fixed 250 kHz switching. | Limited to low-power isolated logic; insufficient for gate driver or ADC supply in high-current systems. | Select when only one isolated signal + minimal power needed; not suitable for 24 V input or >1 W load. |
| ISO7821FDWR | Dual-channel isolator only (no DC-DC); SOIC-16; 100 Mbps; requires external isolated power supply. | Increases BOM and layout complexity; lacks integrated power, limiting space-constrained designs. | Select when system already includes isolated DC-DC; preferred for ultra-high CMTI (>100 kV/µs) or extended temp range beyond 125 °C. |
Compared with ADUM6210ARWZ and ISO7821FDWR, the SI88620BC-ASR uniquely integrates 2 W isolated power delivery with dual high-speed channels and 24 V primary-side support - reducing total isolation solution size by ≥35% and eliminating external regulator design effort.
Availability
SI88620BC-ASR is available at Aetrix Electronics and suitable for industrial automation systems, hybrid electric vehicle motor control, and isolated power supplies requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.
Supply support for SI88620BC-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 Si8862x product line targets high-reliability isolated power + signal applications in automotive and industrial environments, delivering AEC-Q100 qualified performance, programmable DC-DC control, and reinforced 5000 VRMS isolation in a single SOIC-20 package.
FAQ
What is the maximum input voltage supported by the SI88620BC-ASR DC-DC converter?
The SI88620BC-ASR is designed for high-voltage primary-side operation up to 24 V. Its ESW and RSN pins enable external NMOS switching, allowing safe and efficient conversion from 24 V input to isolated 3.3 V or 5 V outputs. Input voltages above 5.5 V require use of the VREGA pin with external NPN transistor to generate a compliant VDDA supply for the primary-side logic.
Does the SI88620BC-ASR support fail-safe operation on power loss?
Yes, the SI88620BC-ASR includes configurable fail-safe modes. When VDDA or VDDB drops below their respective UVLO thresholds, outputs B1 and B2 default to predefined logic states (low or high, depending on ordering option). This behavior is hardware-defined and does not require firmware intervention, ensuring predictable shutdown in motor control or safety-critical systems.
Can the SI88620BC-ASR drive an external MOSFET directly from the ESW pin?
No - the ESW pin is a gate driver output rated for driving the gate of an external NMOS power transistor (e.g., Q1 in Figure 9), not a load. It provides controlled voltage and current slew rates suitable for MOSFET gate charging, but requires external gate resistor and bootstrap components per Skyworks AN901 design guidelines. It does not source load current.
What transformer is recommended for use with the SI88620BC-ASR in a 24 V to 5 V application?
Skyworks validates the UMEC UTB02250s and Coilcraft TA7788-AL transformers for 24 V input to 5 V output with the SI88620BC-ASR. Both meet 5 kVRMS isolation, ≤600 nH leakage inductance, and 25 µH ±5% primary inductance. The UTB02250s is AEC-Q200 qualified, making it preferred for automotive deployments where vibration and thermal cycling are concerns.
How is loop compensation implemented for the SI88620BC-ASR DC-DC converter?
The SI88620BC-ASR uses peak current mode control with Type 1 compensation. A 100 kΩ resistor (RCOMP) is required from COMP to GNDB, and an external capacitor (CCOMP) is connected from COMP to GNDB. Capacitance value is calculated as CCOMP = 1/(2π × fC × RCOMP), where fC is the desired crossover frequency - typically 20–50 kHz for stability across line/load variations.
SI88620BC-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
SI88620BC-ASR FAQ
1.How can I place an order for SI88620BC-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88620BC-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 SI88620BC-ASR reliable?
The price and inventory of SI88620BC-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88620BC-ASR is usually 5 days.
3.What payment methods are accepted for SI88620BC-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88620BC-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88620BC-ASR?
SI88620BC-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88620BC-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 SI88620BC-ASR?
For technical support, including SI88620BC-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88620BC-ASR requirements.
6.How does Aetrix verify that SI88620BC-ASR is sourced from the original manufacturer or authorized distributors?
All SI88620BC-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 SI88620BC-ASR meets industry standards.
7.What is the process for return or replacement of SI88620BC-ASR?
All SI88620BC-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI88620BC-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 SI88620BC-ASR part is unused and in its original packaging.
Return procedure for SI88620BC-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88620BC-ASR Tags
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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
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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