Skyworks Solutions Inc. SI8235AB-D-IS1R

Overview

SI8235AB-D-IS1R from Skyworks Solutions is a dual-channel isolated gate driver IC with 2.5 kVRMS input-to-output isolation, 4.0 A peak output current per channel, TTL-compatible inputs (VIA/VIB), and SOIC-16 narrow-body package. It operates across –40°C to +125°C and supports isolated MOSFET/IGBT half-bridge and dual-switch topologies in industrial inverters and motor control systems.

For engineers reviewing the SI8235AB-D-IS1R datasheet, SI8235AB-D-IS1R pinout, SI8235AB-D-IS1R application, or SI8235AB-D-IS1R equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options - all grounded in Skyworks' official Si823x family documentation and ordering guide.

Technical Context

The SI8235AB-D-IS1R implements two independent, galvanically isolated driver channels using Skyworks' proprietary silicon RF isolation barrier, enabling up to 5 kVRMS withstand voltage (UL1577) and 45 ns propagation delay. Each channel features independent UVLO monitoring (5 V threshold), TTL-level inputs with >400 mV hysteresis, and outputs capable of driving high-side and low-side switches without overlap via dedicated VIA/VIB control logic.

Unlike high-side/low-side variants (e.g., SI8233AB-D-IS1), the SI8235AB-D-IS1R lacks programmable dead time and overlap protection - it functions as a true dual driver with immediate, independent output response to input transitions, making it suitable for synchronous buck, phase-shifted full-bridge, or dual independent gate drive applications where timing coordination is externally managed.

Key Specifications

Pinout & Package

SI8235AB-D-IS1R uses a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length, 2.35 mm height) with creepage ≥5.5 mm and clearance ≥5.0 mm per IEC 60664-1 for 2.5 kVRMS isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8235BB-D-IS1 and SI8235AD-D-IS1, the SI8235AB-D-IS1R provides optimal balance of cost, size, and 2.5 kVRMS isolation for mainstream industrial inverters - offering lower BOM cost than 5 kV variants and tighter UVLO matching for 5 V microcontroller interfaces than 8 V alternatives.

Availability

SI8235AB-D-IS1R is available at Aetrix Electronics and suitable for motor control systems, solar inverters, and isolated dc-dc power supplies requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability options.

Supply support for SI8235AB-D-IS1R 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-performance power and communications systems.

The Si823x family was designed specifically for robust, high-speed isolated gate driving in industrial and automotive power conversion - replacing optocouplers with silicon-based isolation that delivers superior CMTI, lifetime reliability, and integration density.

FAQ

What is the maximum switching frequency supported by the SI8235AB-D-IS1R?

The SI8235AB-D-IS1R supports up to 8 MHz switching frequency, enabled by its ≤45 ns propagation delay and fast 4.0 A output drive strength. This makes the SI8235AB-D-IS1R suitable for high-frequency resonant LLC converters, GaN-based adapters, and digital power supplies where timing precision and minimal dead time are critical.

Does the SI8235AB-D-IS1R include built-in dead time or overlap protection?

No, the SI8235AB-D-IS1R does not include programmable dead time or overlap protection - those features are exclusive to high-side/low-side variants like SI8233AB-D-IS1. As a dual-driver part, the SI8235AB-D-IS1R provides independent, immediate output response to VIA and VIB inputs, requiring external timing control for half-bridge configurations.

What is the meaning of "AB" in the SI8235AB-D-IS1R part number?

In the SI8235AB-D-IS1R ordering code, "AB" denotes the isolation rating (2.5 kVRMS) and UVLO threshold (5 V). Per Skyworks' Si823x ordering guide, "AB" = 2.5 kVRMS / 5 V UVLO, distinguishing it from "BB" (2.5 kVRMS / 8 V UVLO) and "AD" (5.0 kVRMS / 5 V UVLO) variants.

Can the SI8235AB-D-IS1R drive both N-channel and P-channel MOSFETs?

Yes, the SI8235AB-D-IS1R outputs are non-inverting, rail-to-rail drivers compatible with both N-channel (source-grounded) and P-channel (source-connected to VDD) configurations. Its 4.0 A sink/source capability and 10–24 V VDDA/VDDB range allow flexible gate biasing for either topology in level-shifted applications.

Is the SI8235AB-D-IS1R pin-compatible with other Si823x dual-driver variants?

Yes, all Si823x dual-driver variants - including SI8235AB-D-IS1R, SI8235BB-D-IS1, and SI8235AD-D-IS1 - share identical SOIC-16 pinouts and logic behavior. The only differences are isolation rating, UVLO threshold, and package width (narrow vs. wide body), enabling drop-in substitution where electrical and safety requirements align.