Skyworks Solutions Inc. SI8232AD-B-ISR

Overview

SI8232AD-B-ISR from Silicon Labs is a dual-channel isolated gate driver IC with 0.5 A peak output current per channel, 5 kVRMS input-to-output isolation (wide-body SOIC-16), 60 ns max propagation delay, and TTL-compatible inputs with 400 mV hysteresis - designed for driving high-side and low-side MOSFETs/IGBTs in isolated half-bridge power stages.

For engineers reviewing the SI8232AD-B-ISR datasheet, SI8232AD-B-ISR pinout, SI8232AD-B-ISR application, or SI8232AD-B-ISR equivalent, this page delivers verified electrical specs, safety-certified isolation parameters, dual-driver functional behavior, thermal derating data, and real-world motor control and inverter use cases - all grounded in Silicon Labs Rev. 1.5 documentation.

Technical Context

The SI8232AD-B-ISR implements two independent RF-modulated isolated channels using silicon-dielectric isolation, eliminating optocoupler latency and aging. Each channel features separate input (VIA/VIB) and output (VOA/VOB) domains, with no internal dead-time logic - enabling immediate, synchronous switching transitions as confirmed by its truth table.

It operates across –40 °C to +125 °C with VDDI = 2.7–5.5 V and VDDA/VDDB = 6.5–24 V, supports up to 8 MHz switching frequency, and delivers 20 ns typical rise/fall time (CL = 200 pF). Its 45 kV/µs CMTI rating ensures robust operation in noisy power-conversion environments.

Key Specifications

Pinout & Package

SI8232AD-B-ISR is housed in a RoHS-compliant wide-body SOIC-16 package (WBSOIC-16) with 8.0 mm creepage/clearance, supporting 5 kVRMS isolation. Pin numbering follows standard SOIC convention (pin 1 = dot-marked corner).

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si8232BD-B-ISR, SI8232AD-B-ISR offers lower drive strength but tighter propagation matching and simpler biasing; versus ADuM4223BRIZ-RL, it eliminates external components for basic half-bridge drive but lacks diagnostic outputs and has fixed UVLO thresholds.

Availability

SI8232AD-B-ISR is available at Aetrix Electronics and suitable for motor control systems, isolated dc-dc power supplies, and solar inverters requiring stable component supply, long-term lifecycle support, and certified 5 kVRMS isolation performance.

Supply support for SI8232AD-B-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

Silicon Labs is a fabless semiconductor company specializing in precision timing, isolation, and mixed-signal ICs for industrial, automotive, and communications markets.

The Si823x family was engineered to replace optocoupler-based gate drivers with higher reliability, tighter timing, and extended temperature operation - specifically targeting isolated half-bridge and dual-switch power conversion topologies.

FAQ

What is the isolation voltage rating of the SI8232AD-B-ISR?

The SI8232AD-B-ISR is rated for 5 kVRMS input-to-output isolation (1 minute, UL 1577), validated in the wide-body SOIC-16 package. This rating applies specifically to the SI8232AD-B-ISR variant and is confirmed by production testing at 6.0 kVRMS per IEC 60747-5-5. It supports reinforced insulation per IEC 60950-1 and IEC 61010-1 up to 600 VRMS working voltage.

Does the SI8232AD-B-ISR include built-in dead-time control?

No, the SI8232AD-B-ISR does not implement internal dead-time control or overlap protection. As a dual-driver variant (per Table 9), it provides fully independent, synchronous switching of both channels - meaning VOA and VOB transition immediately on corresponding VIA/VIB inputs with no intentional delay. Dead time must be generated externally in the controller logic.

What are the absolute maximum ratings for VDDA and VDDB on the SI8232AD-B-ISR?

The SI8232AD-B-ISR specifies an absolute maximum driver supply voltage of 30 V for both VDDA and VDDB pins. However, operational specifications are guaranteed only up to 24 V. Exceeding 24 V may compromise timing accuracy, increase power dissipation beyond thermal limits, and void safety certification compliance per UL 1577 and VDE 0884-5.

Can the SI8232AD-B-ISR drive IGBTs directly?

Yes, the SI8232AD-B-ISR can drive small-to-medium IGBTs with gate charge ≤ 100 nC at frequencies up to 100 kHz. Its 0.5 A peak sink/source capability and 20 ns typical rise/fall time (CL = 200 pF) meet requirements for 600 V/25 A IGBT modules. For higher gate charge devices, external push-pull buffers are recommended to maintain switching speed and reduce Miller-induced turn-on risk.

Is the SI8232AD-B-ISR AEC-Q100 qualified?

Yes, the SI8232AD-B-ISR is AEC-Q100 qualified per Grade 1 (–40 °C to +125 °C junction temperature), as documented in the Si823x datasheet Rev. 1.5. This qualification covers accelerated stress tests including HTOL, TC, UHAST, and ESD - confirming suitability for automotive powertrain and body electronics applications where reliability under thermal cycling and voltage transients is critical.