Skyworks Solutions Inc. SI8232AB-D-IS1R

Overview

SI8232AB-D-IS1R from Skyworks Solutions is a dual-channel isolated gate driver IC with 2.5 kVRMS input-to-output isolation, 0.5 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 driving in half-bridge and dual-switch topologies for industrial inverters and motor control systems.

For engineers reviewing the SI8232AB-D-IS1R datasheet, SI8232AB-D-IS1R pinout, SI8232AB-D-IS1R application, or SI8232AB-D-IS1R equivalent, key selection criteria include its dual independent isolated outputs, 5 V UVLO threshold, 45 ns propagation delay, RoHS-compliant SOIC-16 narrow-body footprint, and AEC-Q100-qualified automotive-grade variant availability.

Technical Context

The SI8232AB-D-IS1R implements two fully isolated RF-modulated channels using Skyworks' proprietary silicon isolation barrier-no optocoupler or transformer required. Each channel features independent undervoltage lockout (UVLO) monitoring on VDDI, VDDA, and VDDB, with 5 V UVLO thresholds and automatic low-state default during fault conditions.

Unlike high-side/low-side variants (e.g., SI8230/3), this dual-driver configuration lacks programmable dead time or overlap protection; inputs VIA and VIB directly control outputs VOA and VOB with immediate (no internal delay) transitions, enabling synchronous or independently timed switching in non-overlapping topologies.

Key Specifications

Pinout & Package

SI8232AB-D-IS1R uses a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length, 1.75 mm height) with creepage ≥5.5 mm and clearance ≥5.0 mm per IEC 60664-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8232AD-D-IS1R, the SI8232AB-D-IS1R trades isolation robustness (2.5 vs. 5.0 kVRMS) for cost and size efficiency in non-medical industrial applications; versus UCC21520DWR, it offers lower gate drive strength but superior noise immunity via RF modulation and smaller footprint.

Availability

SI8232AB-D-IS1R is available at Aetrix Electronics and suitable for motor control systems, solar inverters, and industrial UPS systems requiring stable component supply, long-term lifecycle support, and automotive-grade traceability options.

Supply support for SI8232AB-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, isolation, and precision timing technologies.

The Si823x family was designed specifically for high-reliability isolated gate driving in power conversion systems, emphasizing noise immunity, compact integration, and compliance with industrial and automotive safety standards.

FAQ

What is the maximum operating frequency supported by the SI8232AB-D-IS1R?

The SI8232AB-D-IS1R supports up to 8 MHz switching frequency, enabled by its 45 ns maximum propagation delay and fast 10–90% rise/fall times (<10 ns typical at 12 V VDDA with 100 pF load). This allows use in high-frequency resonant converters and digital power controllers where tight timing margins are critical. The SI8232AB-D-IS1R maintains consistent delay across temperature and supply voltage variations, ensuring stable timing in demanding applications.

Does the SI8232AB-D-IS1R include built-in dead time or overlap protection?

No, the SI8232AB-D-IS1R does not include programmable dead time or overlap protection. As a dual-driver (not high-side/low-side) variant, it provides independent, immediate-response control of VOA and VOB with no internal delay-unlike SI8230/3/4/5 parts. Timing coordination must be handled externally by the controller. The SI8232AB-D-IS1R truth table confirms output transitions occur immediately upon input change, making it suitable for synchronous rectification or dual-switch forward converters where overlapping is intentional or managed upstream.

What are the UVLO thresholds for the SI8232AB-D-IS1R and how do they affect system reliability?

The SI8232AB-D-IS1R has a 5 V UVLO threshold on all three supply domains: VDDI, VDDA, and VDDB. When any supply drops below 5 V, its corresponding functional block disables-VIA/VIB inputs ignored if VDDI < 5 V; VOA forced low if VDDA < 5 V. This prevents partial operation and shoot-through during brown-out events. The SI8232AB-D-IS1R's guaranteed 5 V threshold (with hysteresis) ensures clean, repeatable turn-off across temperature and process variation, enhancing system robustness in industrial power supplies.

Can the SI8232AB-D-IS1R drive SiC or GaN MOSFETs effectively?

Yes, the SI8232AB-D-IS1R can drive discrete SiC and GaN MOSFETs in low-to-medium power applications (≤3 kW). Its 0.5 A peak output current, 45 ns propagation delay, and >35 kV/µs CMTI support fast switching with minimal gate ringing. For high-dV/dt GaN devices, pairing the SI8232AB-D-IS1R with external negative turn-off bias or RC snubbers is recommended. The SI8232AB-D-IS1R's TTL-compatible inputs simplify interface with FPGA or MCU PWM generators without level-shifting.

Is the SI8232AB-D-IS1R pin-compatible with other Si823x family members in SOIC-16 narrow-body packages?

Yes, the SI8232AB-D-IS1R shares identical pinout and package dimensions with all Si823x variants in the SOIC-16 narrow-body (IS1) configuration-including SI8230AB-D-IS1R, SI8231AB-D-IS1R, SI8233AB-D-IS1R, and SI8234AB-D-IS1R. This enables drop-in replacement within the same isolation rating (2.5 kVRMS) and UVLO (5 V) group. However, functional differences (e.g., PWM vs. dual-input, 0.5 A vs. 4 A output) require firmware or schematic validation before substitution. The SI8232AB-D-IS1R remains electrically and mechanically interchangeable at the board level.