Skyworks Solutions Inc. SI8220BB-A-ISR

Overview

SI8220BB-A-ISR from Skyworks Solutions is a 2.5 A peak-output isolated gate driver with opto-emulator input, 5.0 kVRMS isolation rating (UL1577), 60 ns max propagation delay, and –40 to +125 °C operating range. It replaces HCPL-3120/HCPL-0302 in IGBT/MOSFET gate drive circuits for industrial inverters and UPS systems.

For engineers reviewing the SI8220BB-A-ISR datasheet, SI8220BB-A-ISR pinout, SI8220BB-A-ISR application, or SI8220BB-A-ISR equivalent, key selection criteria include its 5.0 kVRMS reinforced insulation, UVLO hysteresis of 1000 mV (12.5 V threshold), 30 kV/µs CMTI, and SOIC-8 narrow-body package compatibility with legacy opto-driver footprints.

Technical Context

The SI8220BB-A-ISR implements RF-based on/off keying across a silicon isolation barrier-replacing LED/photodiode coupling-to deliver stable timing independent of input current. Its input emulates an LED but requires only 5–20 mA forward current, enabling direct MCU/FPGA I/O drive without external transistors.

Internally, it integrates under-voltage lockout with 12.5 V turn-on threshold (VDDUV+ = 12.4–14.8 V) and 1000 mV hysteresis, plus output driver stages optimized for 2.5 A peak sink/source into capacitive gate loads up to 200 pF at ≤2 MHz switching frequency.

Key Specifications

Pinout & Package

SI8220BB-A-ISR is housed in an ROHS-compliant SOIC-8 narrow-body package (5.3 mm width, 5.0 mm body length, 1.75 mm height) with creepage/clearance ≥4.01 mm / 4.9 mm per IEC 60664-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated gate driver applications.

Compared with HCPL-3120-000E, SI8220BB-A-ISR delivers 8× faster propagation, eliminates LED degradation over time, and adds precise UVLO control-enabling reliable operation in high-reliability industrial systems where timing consistency and long-term parametric stability are mandatory.

Availability

SI8220BB-A-ISR is available at Aetrix Electronics and suitable for industrial inverters, UPS systems, and motor control drives requiring stable component supply, long lifecycle support, and certified reinforced isolation.

Supply support for SI8220BB-A-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 for wireless, infrastructure, and industrial markets.

The Si8220 family is designed for high-reliability isolated gate driving in power conversion systems where optocoupler limitations-aging, temperature drift, and slow timing-must be eliminated.

FAQ

What is the isolation voltage rating of the SI8220BB-A-ISR?

The SI8220BB-A-ISR is rated for 5.0 kVRMS isolation per UL1577, with production testing performed at 6.0 kVRMS for 1 second. This rating applies to the SOIC-8 narrow-body package and satisfies reinforced insulation requirements for IEC 60950-1 and IEC 62368-1 end-equipment standards. The device achieves this via Skyworks' proprietary silicon isolation barrier, not optical coupling.

Does the SI8220BB-A-ISR require external components for basic operation?

Yes - the SI8220BB-A-ISR requires local decoupling: a 0.1 µF ceramic capacitor and a 10 µF bulk capacitor placed between VDD (Pin 2) and VSS (Pin 4). No external pull-ups, level shifters, or bias resistors are needed for standard MCU-driven operation, as its LED-emulator input accepts 5–20 mA directly from GPIO pins.

Can the SI8220BB-A-ISR replace HCPL-3120 in existing PCB layouts?

Yes - the SI8220BB-A-ISR uses the same SOIC-8 narrow-body footprint as HCPL-3120, with identical pin 1–4 and pin 5–8 assignments. However, note that SI8220BB-A-ISR has NC pins (7, 8) instead of internal logic connections, so unused pins must remain unconnected or grounded per layout guidelines - no trace rerouting is required.

What is the under-voltage lockout behavior of the SI8220BB-A-ISR?

The SI8220BB-A-ISR features a 12.5 V nominal UVLO threshold with 1000 mV hysteresis: VO remains low until VDD rises above 12.4–14.8 V (VDDUV+), and stays active until VDD falls below 11.6–13.8 V (VDDUV−). This prevents partial-turn-on of power devices during brownout conditions and ensures clean startup in industrial power supplies.

Is the SI8220BB-A-ISR suitable for automotive applications?

Yes - the SI8220BB-A-ISR is AEC-Q100 qualified (Grade 1: –40 °C to +125 °C ambient), has reinforced insulation certified to VDE 0884-5 and UL1577, and supports the voltage, timing, and reliability demands of automotive traction inverters, on-board chargers, and DC-DC converters - provided system-level safety analysis validates its use per ISO 26262 ASIL requirements.