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Skyworks Solutions Inc. SI88320BD-ASR
- Part No.:
- SI88320BD-ASR
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SI88320BD-ASR.pdf
- Description:
- LINEAR IC
- Quantity:
- Payment:
- Shipping:
Inventory:4,158
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Product details
Overview
SI88320BD-ASR 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 across 5 kVRMS isolation. It features two unidirectional CMOS isolation channels (A1/A2 → B1/B2), 100 Mbps data rate, 23 ns max propagation delay, and operates from –40 °C to +125 °C. It is used in motor control inverters where galvanic separation of gate drive signals and auxiliary power for isolated-side logic is required.
For engineers reviewing the SI88320BD-ASR datasheet, SI88320BD-ASR pinout, SI88320BD-ASR application, or SI88320BD-ASR equivalent, this page provides verified functional specifications, SOIC-20WB package mapping, confirmed automotive-grade AEC-Q100 qualification, and validated alternative parts for isolated power + signal transfer in industrial and EV traction systems.
Technical Context
The SI88320BD-ASR implements RF-based on/off keying modulation across a silicon dioxide capacitive barrier for noise-immune digital isolation. Its integrated flyback DC-DC controller uses peak current mode control with secondary-side voltage sensing via VSNS and closed-loop feedback transmitted across the isolation barrier.
It supports low-voltage input (3–5.5 V) to 3.3/5.0 V output configuration with internal power switches (VSW), programmable soft-start (SS pin), shutdown control (SH_FC pin), and adjustable switching frequency (200–800 kHz via SH_FC/SS RC network). Thermal shutdown and cycle-skipping at light loads are built-in.
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, VDE 62368-1. |
| Data Rate | Up to 100 Mbps - enables high-speed serial communication (e.g., SPI, UART) across isolation barrier without timing skew. |
| Propagation Delay | 23 ns max - ensures tight timing alignment between isolated control signals in gate driver applications. |
| DC-DC Output Power | 2 W average at 5.0 V - sufficient to power isolated microcontrollers, ADCs, or gate drivers without external regulators. |
| Operating Temperature | –40 °C to +125 °C - qualified for under-hood automotive and industrial motor control environments. |
| AEC-Q100 Grade | Qualified per AEC-Q100 Rev G - supports PPAP documentation and IMDS/CAMDS compliance for automotive OEM use. |
| Transient Immunity | 100 kV/µs typical - maintains signal integrity during fast-switching IGBT/SiC events in inverter circuits. |
Pinout & Package
SI88320BD-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 | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6 | GNDP, VSW, VDDP, VDDA, GNDA, SH_FC | Primary-side ground, internal switch output, primary power input, signal supply, signal ground, shutdown/frequency control - enables safe, configurable DC-DC operation. |
| 7, 8, 9, 10 | NC, SS, A1, A2 | No-connect, soft-start timing capacitor node, forward channel inputs - SS sets startup ramp time to limit inrush current. |
| 11, 12, 13, 14 | B1, B2, HF XMTR, HF RCVR | Isolated-side outputs, high-frequency transmitter/receiver - B1/B2 deliver isolated logic signals; HF pins handle internal RF modulation. |
| 15, 16, 17, 18, 19, 20 | GNDB, VDDB, VSNS, COMP, NC, NC | Secondary ground, isolated-side power supply, feedback sense, compensation node, no-connect - VSNS enables precise secondary-side regulation without optocouplers. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC-DC with secondary-side sensing | Eliminates optocoupler bias circuitry, improves load regulation (< ±1.5%) and simplifies BOM for isolated power rails. |
| Programmable soft-start (SS pin) | External capacitor sets controlled ramp-up of isolated output voltage, preventing inrush into downstream capacitance. |
| Shutdown & frequency control (SH_FC pin) | Single pin enables converter disable or RC-tuned PWM frequency (200–800 kHz) to avoid EMI-sensitive bands. |
| RF-based isolation architecture | On/off keying delivers >100 kV/µs CMTI and immunity to magnetic fields - critical for noisy motor drive environments. |
| AEC-Q100 automotive qualification | Validated for automotive-grade reliability including HTOL, TC, and ESD testing - supports functional safety (ASIL-B ready). |
Applications
| Industrial Motor Drives | EV Traction Inverters |
|---|---|
Use Scenario: Isolating PWM gate signals and powering isolated gate driver ICs in 3-phase IGBT/SiC inverter stacks. IC Role / Device Role / Timing Role: Dual-channel isolator transfers high-speed control signals while supplying regulated 5 V to isolated-side drivers and current-sense amplifiers. Use Value: Enables compact, single-chip isolated power + signal solution with <23 ns prop delay - reduces timing skew vs. discrete isolator + DC-DC combos. |
Use Scenario: Providing isolated 5 V power and signal transfer for MCU-based torque control in battery electric vehicle inverters. IC Role / Device Role / Timing Role: SI88320BD-ASR delivers reinforced insulation (5 kVRMS) and AEC-Q100 qualification for safety-critical subsystems. Use Value: Meets automotive transient immunity (100 kV/µs) and thermal range (–40 to +125 °C) without derating - eliminates need for external protection components. |
| PLC Digital I/O Modules | Isolated Data Acquisition Systems |
Use Scenario: Galvanically isolating field-side digital inputs/outputs in programmable logic controllers with onboard power conversion. IC Role / Device Role / Timing Role: SI88320BD-ASR replaces optocouplers + isolated DC-DC converters, reducing board area by >40% in 24 V input modules. Use Value: SOIC-20WB package provides 8.3 mm creepage - satisfies IEC 61000-4-5 surge and pollution degree 2 requirements without layout spacing penalties. |
Use Scenario: Isolating analog front-end sensor interfaces (e.g., isolated Σ-Δ ADCs) while powering isolated reference buffers and SPI interfaces. IC Role / Device Role / Timing Role: Dual-channel isolation separates sensor domain from host MCU, with 100 Mbps data rate supporting high-resolution sampling. Use Value: Secondary-side VSNS feedback ensures stable 3.3 V rail under varying load - critical for precision ADC reference stability and SNR performance. |
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; SOIC-16WB; 25 Mbps max data rate; no programmable frequency or soft-start. | Limited to lower-power isolated logic; insufficient for driving gate drivers or high-current ADC references. | Select when only basic isolation and <500 mW auxiliary power are needed - not suitable for 2 W motor control loads. |
| ISO7821FDWWR | 2-channel isolator only (no DC-DC); SOIC-16WB; 100 Mbps; requires external isolated power supply. | Increases BOM count and layout complexity due to separate DC-DC converter and transformer. | Choose when system already includes an isolated power rail and only signal isolation is required - avoids redundant DC-DC integration. |
Compared with ADUM6210ARWZ and ISO7821FDWWR, SI88320BD-ASR uniquely combines 2 W isolated power, 100 Mbps signaling, AEC-Q100 qualification, and programmable soft-start/frequency in one SOIC-20WB package - enabling single-component solutions for automotive and industrial inverters where space, reliability, and EMI control are critical.
Availability
SI88320BD-ASR is available at Aetrix Electronics and suitable for industrial motor drives, EV traction inverters, and PLC digital I/O modules requiring stable component supply with automotive-grade lifecycle assurance.
Supply support for SI88320BD-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.
The Si88x2x product line was designed specifically for high-reliability isolated power + signal transfer in automotive and industrial systems - integrating robust digital isolation with flexible, efficient DC-DC conversion in a single package.
FAQ
What is the maximum isolated DC-DC output power of the SI88320BD-ASR?
The SI88320BD-ASR delivers up to 2 W average output power at 5.0 V in low-voltage configurations (3–5.5 V input). This is sufficient to power isolated gate drivers, microcontrollers, and precision analog circuitry without external regulators. Peak power capability exceeds 5 W briefly during startup, but sustained operation is rated at 2 W under thermal limits specified in the datasheet.
Does the SI88320BD-ASR support AEC-Q100 qualification for automotive use?
Yes, the SI88320BD-ASR is AEC-Q100 qualified (Grade 1, –40 °C to +125 °C junction temperature) and supported with AIAG-compliant PPAP documentation, IMDS, and CAMDS listings. It meets automotive requirements for HTOL, temperature cycling, and ESD robustness - making it suitable for EV inverter control units and battery management systems.
How does the SI88320BD-ASR achieve secondary-side voltage regulation without optocouplers?
The SI88320BD-ASR uses an internal error amplifier that compares the divided output voltage (via VSNS pin) to a precision internal reference. The resulting error signal is encoded and transmitted across the isolation barrier via a dedicated feedback path - eliminating external optocouplers and their associated biasing complexity and aging drift.
Can the switching frequency of the integrated DC-DC converter be adjusted on the SI88320BD-ASR?
Yes, the SI88320BD-ASR allows programmable PWM frequency from 200 kHz to 800 kHz using an external RC network connected between SH_FC and SS pins. This enables EMI optimization by shifting switching noise away from sensitive frequency bands - a feature not available on fixed-frequency alternatives like ADUM6210.
What is the role of the SH_FC pin on the SI88320BD-ASR?
The SH_FC pin on the SI88320BD-ASR serves dual functions: asserting it high disables the DC-DC converter (shutdown mode), and configuring it with an RC network sets the switching frequency. During normal operation, it must be grounded or actively driven - floating is not permitted per datasheet recommendations.
SI88320BD-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
SI88320BD-ASR FAQ
1.How can I place an order for SI88320BD-ASR through Aetrix?
Please submit a Request for Quotation (RFQ) for SI88320BD-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 SI88320BD-ASR reliable?
The price and inventory of SI88320BD-ASR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI88320BD-ASR is usually 5 days.
3.What payment methods are accepted for SI88320BD-ASR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI88320BD-ASR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI88320BD-ASR?
SI88320BD-ASR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI88320BD-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 SI88320BD-ASR?
For technical support, including SI88320BD-ASR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI88320BD-ASR requirements.
6.How does Aetrix verify that SI88320BD-ASR is sourced from the original manufacturer or authorized distributors?
All SI88320BD-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 SI88320BD-ASR meets industry standards.
7.What is the process for return or replacement of SI88320BD-ASR?
All SI88320BD-ASR units undergo pre-shipment inspection (PSI). If there is an issue with SI88320BD-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 SI88320BD-ASR part is unused and in its original packaging.
Return procedure for SI88320BD-ASR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SI88320BD-ASR Tags
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SI8710AC-B-ISR
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ISO7741FDWR
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