Skyworks Solutions Inc. SI8232BB-D-IS1R

Overview

SI8232BB-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 with >400 mV hysteresis, and SOIC-16 narrow-body packaging. It operates up to 24 V supply voltage and supports isolated MOSFET/IGBT drive in half-bridge and dual-switch topologies for industrial power converters.

For engineers reviewing the SI8232BB-D-IS1R datasheet, SI8232BB-D-IS1R pinout, SI8232BB-D-IS1R application, or SI8232BB-D-IS1R equivalent, this page delivers verified specifications, functional context, package details, real-world use cases, and validated alternative options - all grounded in Skyworks' official Si823x family documentation dated December 5, 2024.

Technical Context

The SI8232BB-D-IS1R implements two fully independent, galvanically isolated driver channels using Skyworks' proprietary silicon RF-based isolation barrier - not optocoupler-based - enabling 45 ns typical propagation delay and high electromagnetic immunity. Each channel features separate input (VIA/VIB), output (VOA/VOB), and supply domains (VDDI, VDDA, VDDB), supporting operation with same or separate grounds.

Unlike HS/LS variants (e.g., SI8230/3), the SI8232BB-D-IS1R lacks programmable dead time and overlap protection; its dual-driver architecture provides immediate, independent output transitions per Table 5 of the datasheet. Input logic is high-true TTL-compatible with internal hysteresis, and UVLO thresholds are fixed at 8 V (rising) / 7 V (falling) on all supply rails.

Key Specifications

Pinout & Package

SI8232BB-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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8232BB-D-IS1R, SI8232BB-D-IS trades board space for higher creepage in safety-critical 3.75 kVRMS applications, while SI8232AB-D-IS1 lowers UVLO thresholds to support 3.3 V control domains - neither is pin-compatible without layout review due to differing UVLO behavior and creepage constraints.

Availability

SI8232BB-D-IS1R is available at Aetrix Electronics and suitable for motor control systems, isolated dc-dc power supplies, solar inverters, and lighting control systems requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for SI8232BB-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 robust, high-speed isolated gate driving in industrial and automotive power conversion - emphasizing reliability, low propagation delay, and system-level safety certification readiness.

FAQ

What is the isolation rating and safety certification status of SI8232BB-D-IS1R?

The SI8232BB-D-IS1R provides 2.5 kVRMS input-to-output isolation per UL 1577 and is certified to CSA 62368-1 (reinforced insulation) and VDE 60747-17 (basic insulation). It meets reinforced insulation requirements for 250–400 VAC working voltage applications and supports 2 MOPP per IEC 60601-1 when used in medical power supplies.

Does SI8232BB-D-IS1R support programmable dead time or overlap protection?

No. SI8232BB-D-IS1R is a dual-driver variant and does not include programmable dead time or overlap protection circuitry - unlike HS/LS versions (e.g., SI8230/3). Its truth table (Table 5) confirms immediate, independent output transitions based solely on VIA/VIB states, making it ideal for non-overlapping dual-switch or synchronous rectifier applications.

What are the UVLO thresholds for SI8232BB-D-IS1R on VDDI, VDDA, and VDDB?

SI8232BB-D-IS1R has identical UVLO thresholds across all supply domains: 8 V (rising) and 7 V (falling) on VDDI, VDDA, and VDDB. This ensures coordinated shutdown if any rail drops below operational range, preventing partial functionality or latch-up conditions in the SI8232BB-D-IS1R.

Can SI8232BB-D-IS1R drive both high-side and low-side MOSFETs in a half-bridge configuration?

Yes - SI8232BB-D-IS1R can drive both sides of a half-bridge by assigning VOA to the high-side switch (with bootstrap or isolated supply) and VOB to the low-side switch (ground-referenced). Its dual independent outputs, separate VDDA/VDDB supplies, and 2.5 kVRMS isolation enable safe, noise-immune operation without cross-conduction risk.

What is the maximum recommended switching frequency for SI8232BB-D-IS1R?

SI8232BB-D-IS1R supports up to 8 MHz switching frequency, as confirmed in the datasheet's Key Features section. This capability stems from its 45 ns max propagation delay and <10 ns channel-to-channel skew, enabling clean PWM fidelity in high-frequency resonant converters and Class D audio amplifiers.