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Skyworks Solutions Inc. SI88622BC-ISR
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- Part No.:
- SI88622BC-ISR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88622BC-ISR.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,846
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Product details
Overview
SI88622BC-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 from a 24 V input, supporting data rates up to 100 Mbps, propagation delay ≤23 ns, and 5000 VRMS isolation rating. It serves as a complete signal + power isolation solution in high-voltage industrial inverters and automotive battery management systems.
For engineers reviewing the SI88622BC-ISR datasheet, SI88622BC-ISR pinout, SI88622BC-ISR application, or SI88622BC-ISR equivalent, this page provides verified technical context, SOIC-20 wide-body package mapping, confirmed pin functions (including ESW, RSN, SH_FC, SS), real-world isolation performance (100 kV/µs CMTI), and two validated alternative parts for high-voltage-to-low-voltage DC-DC isolation designs.
Technical Context
The SI88622BC-ISR implements a modified flyback DC-DC topology with external NMOS switch control via ESW pin and primary-side current sensing via RSN pin, enabling 24 V input to 3.3/5.0 V isolated output conversion. Its RF-based digital isolation uses on/off keying across a silicon dioxide barrier, delivering 0–100 Mbps operation with 18 ns typical propagation delay and 100 kV/µs common-mode transient immunity.
It supports programmable soft-start (SS pin), shutdown (SH_FC pin asserted high), and frequency tuning (via RC network on SH_FC/SS), with internal error amplifier feedback loop closed through VSNS and COMP pins. The device operates across –40 °C to +125 °C and is AEC-Q100 qualified for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for one 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 communication (e.g., SPI, RS-485) across isolation barrier without timing bottlenecks. |
| Propagation Delay | ≤23 ns max - ensures precise timing alignment in motor control gate drivers and real-time feedback loops. |
| DC-DC Output Power | Up to 2 W average at 5.0 V - sufficient to power secondary-side microcontrollers, ADCs, and gate drivers without external regulators. |
| Input Voltage Range | Up to 24 V on primary side - supports direct integration into industrial PLC backplanes and EV battery monitoring rails. |
| CMTI | 100 kV/µs typical - maintains signal integrity in noisy high-dv/dt environments like IGBT/SiC inverter switching nodes. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial ambient conditions. |
Pinout & Package
SI88622BC-ISR is housed in a RoHS-compliant SOIC-20 wide-body package (10.3 mm × 15.4 mm, 1.27 mm pitch), optimized for creepage/clearance compliance in 24 V–400 V systems. Pin layout follows Figure 4 (Si88622 variant) in the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Digital isolator primary-side supply | Accepts 3.0–5.5 V; powers A1/A2 transmitter circuits and internal logic; requires local bypass capacitor. |
| GNDA | Primary-side signal ground | Reference for VDDA and A1/A2 inputs; must be short-traced to VDDA bypass cap ground. |
| A1, A2 | Primary-side digital input channels | CMOS-compatible unidirectional inputs; support 0–100 Mbps; no external bias required. |
| VDDP | DC-DC primary-side power input | Connects to 24 V rail; supplies internal controller and ESW driver; requires bulk and bypass capacitors. |
| GNDP | DC-DC primary-side ground | Power ground for VDDP and ESW; separate from GNDA to maintain isolation integrity. |
| ESW | External switch driver output | Drives gate of external NMOS FET (Q1); enables high-voltage primary-side switching for 24 V input operation. |
| RSN | Current sense input | Monitors primary-side switch current via shunt resistor; enables cycle-by-cycle overcurrent protection. |
| SH_FC | Shutdown and frequency control | Assert high to disable DC-DC; RC network sets PWM frequency (200–800 kHz) for EMI optimization. |
| SS | Soft-start control | External capacitor sets startup ramp time to limit inrush current into transformer and output caps. |
| VREGA | Internal voltage reference output | Provides 5.0 V reference for external NPN bias circuit to generate VDDA when no 3–5.5 V rail exists. |
| GNDB | Secondary-side signal ground | Reference for VDDB and B1/B2 outputs; galvanically isolated from GNDA/GNDP. |
| VDDB | Digital isolator secondary-side supply | Powered by isolated DC-DC output; supplies B1/B2 receivers and downstream logic. |
| B1, B2 | Secondary-side digital output channels | CMOS outputs referenced to VDDB; driven by RF receivers; low skew and jitter for timing-critical interfaces. |
| VSNS | DC-DC feedback input | Connects to resistor divider from isolated output; enables precise regulation (±1.5%) without optocouplers. |
| COMP | Compensation node | RC network (100 kΩ + capacitor) sets loop stability; matches internal transconductance for peak-current-mode control. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated flyback DC-DC controller | Eliminates need for discrete isolated power ICs and optocoupler feedback networks - reduces BOM count by ≥4 components. |
| RF-based digital isolation | On/off keying architecture delivers best-in-class 100 kV/µs CMTI and immunity to magnetic fields - critical for inverter gate drive isolation. |
| Programmable soft-start & shutdown | SS and SH_FC pins enable controlled power-up sequencing and system-level fault response - prevents latch-up during brownout events. |
| External switch control (ESW + RSN) | Supports 24 V primary-side operation with external FET and current sensing - extends input range beyond internal switch limits (≤5.5 V). |
| Secondary-side voltage sensing | VSNS feedback closes regulation loop across isolation barrier - achieves ±1.5% load/line regulation without secondary-side LDOs. |
| AEC-Q100 qualification | Validated for automotive applications including battery disconnect units and OBC control modules - includes PPAP documentation support. |
Applications
| Industrial Motor Drives | Automotive Battery Management Systems |
|---|---|
Use Scenario: Isolating gate drive signals and current-sense feedback in 3-phase IGBT/SiC inverter stacks operating at 400–800 V bus voltages. IC Role / Device Role / Timing Role: SI88622BC-ISR provides dual-channel signal isolation plus localized 5 V power for gate drivers and ADCs - replaces discrete isolators + isolated DC-DC modules. Use Value: Enables compact, high-CMTI (>100 kV/µs) isolation with <23 ns propagation delay, reducing timing skew between phase legs and improving PWM fidelity. |
Use Scenario: Monitoring cell voltages and pack currents in high-voltage EV traction batteries (up to 900 V), where isolated communication and sensor power are mandatory. IC Role / Device Role / Timing Role: SI88622BC-ISR isolates SPI commands to daisy-chained battery monitor ICs while powering their VDD and REF inputs from the isolated 5 V rail. Use Value: Eliminates need for separate isolated power supplies - simplifies layout, improves long-term reliability, and meets AEC-Q100 temperature and lifetime requirements. |
| Programmable Logic Controllers | Isolated Industrial Data Acquisition |
Use Scenario: Providing isolated digital I/O and fieldbus interface (e.g., RS-485, CAN FD) in modular PLC backplanes with 24 V system rails. IC Role / Device Role / Timing Role: SI88622BC-ISR isolates control signals between CPU module and I/O modules while powering isolated transceivers and level shifters. Use Value: Supports 100 Mbps data rates for high-speed backplane protocols and delivers 2 W of clean, regulated 5 V power - reduces external component count by ≥3. |
Use Scenario: Isolating analog front-end (AFE) signals and powering precision ADCs in high-resolution industrial DAQ systems exposed to 480 VAC mains noise. IC Role / Device Role / Timing Role: SI88622BC-ISR isolates digital control lines (e.g., SPI clock/data) to isolated ADCs and supplies their analog/digital domains with low-noise 3.3 V. Use Value: Achieves >100 dB SNR preservation by eliminating ground-loop noise and providing tightly regulated, low-ripple isolated supply - critical for 24-bit measurements. |
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 | 2-channel isolator + 500 mW isolated DC-DC; fixed 5 V output; no external switch support; SOIC-16 package. | Limited to ≤5.5 V input; insufficient power for driving multiple gate drivers or ADCs simultaneously. | Choose ADUM6210ARWZ only for low-power, space-constrained 3.3/5 V input systems requiring minimal external components. |
| ISO7821FDWR | 2-channel isolator only - no integrated DC-DC; requires external isolated power supply; SOIC-16 package. | Increases BOM count and board area; adds design complexity for feedback regulation and transformer selection. | Choose ISO7821FDWR when existing isolated power architecture is already optimized and only signal isolation is needed. |
Compared with ADUM6210ARWZ and ISO7821FDWR, SI88622BC-ISR uniquely combines 24 V input capability, 2 W isolated power, and programmable DC-DC control (ESW/RSN/SH_FC/SS) in a single SOIC-20 package - making it the only option that eliminates both external power ICs and optocoupler-based feedback in high-voltage industrial and automotive designs.
Availability
SI88622BC-ISR is available at Aetrix Electronics and suitable for industrial motor drives, automotive battery management systems, and isolated data acquisition requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for SI88622BC-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 wireless, automotive, and industrial markets.
The Si88xx family was designed specifically for high-reliability signal + power isolation in harsh environments - targeting applications demanding reinforced insulation, high CMTI, wide temperature range, and integrated DC-DC functionality without optocouplers.
FAQ
What is the maximum input voltage supported by SI88622BC-ISR?
The SI88622BC-ISR supports up to 24 V on its VDDP pin, enabled by its external NMOS switch driver (ESW) and current sense input (RSN). This allows direct connection to industrial 24 V rails or automotive battery domains without intermediate regulation - unlike variants limited to 5.5 V input. The device's internal architecture is explicitly rated and validated for 24 V primary-side operation per Skyworks AN901 design guide.
Does SI88622BC-ISR require an external transformer?
Yes, SI88622BC-ISR requires an external miniature transformer (e.g., UMEC UTB02250s or Coilcraft TA7618-AL) to implement its isolated flyback DC-DC converter. The transformer provides galvanic isolation and voltage transformation; Skyworks validates specific part numbers in Table 2 of the datasheet, specifying turns ratio, leakage inductance, and isolation rating to ensure safety and regulation performance.
How is the isolated output voltage set for SI88622BC-ISR?
The isolated output voltage is set using a resistor divider (R1/R2) connected between VDDB and GNDB, feeding the VSNS pin. The internal error amplifier compares the divided voltage to a 1.22 V reference; the resulting error adjusts duty cycle to regulate output. For example, a 5.0 V output requires R1 = 31.6 kΩ and R2 = 10 kΩ, per the equation VOUT = 1.22 × (1 + R1/R2).
What is the purpose of the SH_FC and SS pins on SI88622BC-ISR?
SH_FC (pin 7) serves dual function: asserting it high disables the DC-DC converter, while configuring it with an RC network sets the PWM switching frequency (200–800 kHz) to minimize EMI. SS (pin 8) accepts an external capacitor to program soft-start ramp time, limiting inrush current during power-up - both features are exclusive to Si883xx/Si886xx families and critical for robust system-level power sequencing.
Is SI88622BC-ISR qualified for automotive applications?
Yes, SI88622BC-ISR is AEC-Q100 qualified (Grade 1, –40 °C to +125 °C) and supports AIAG-compliant PPAP documentation, IMDS/CAMDS listings, and automotive-specific manufacturing flows. It is certified to UL 1577 (5000 VRMS), CSA 62368-1, and VDE 62368-1 - meeting reinforced insulation requirements for battery disconnect units, on-board chargers, and traction inverter controls.
SI88622BC-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:
- 0/2
- 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
SI88622BC-ISR FAQ
1.How can I place an order for SI88622BC-ISR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88622BC-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 SI88622BC-ISR reliable?
The price and inventory of SI88622BC-ISR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88622BC-ISR is usually 5 days.
3.What payment methods are accepted for SI88622BC-ISR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88622BC-ISR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88622BC-ISR?
SI88622BC-ISR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88622BC-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 SI88622BC-ISR?
For technical support, including SI88622BC-ISR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88622BC-ISR requirements.
6.How does Aetrix verify that SI88622BC-ISR is sourced from the original manufacturer or authorized distributors?
All SI88622BC-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 SI88622BC-ISR meets industry standards.
7.What is the process for return or replacement of SI88622BC-ISR?
All SI88622BC-ISR units undergo pre-shipment inspection (PSI). If there is an issue with SI88622BC-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 SI88622BC-ISR part is unused and in its original packaging.
Return procedure for SI88622BC-ISR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88622BC-ISR 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
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
Texas Instruments
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