Skyworks Solutions Inc. SI8232AB-D-ISR

Overview

SI8232AB-D-ISR 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 RoHS-compliant packaging. It operates across –40°C to +125°C and supports isolated MOSFET/IGBT drive in half-bridge and dual-switch topologies.

For engineers reviewing the SI8232AB-D-ISR datasheet, SI8232AB-D-ISR pinout, SI8232AB-D-ISR application, or SI8232AB-D-ISR equivalent, this page delivers verified functional identity, confirmed isolation rating and output capability, validated dual-driver logic behavior, and real-world automotive and industrial use context - all grounded in Skyworks' official Si823x Final Data Sheet (206326B, Dec 2024).

Technical Context

The SI8232AB-D-ISR implements two 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 (VDDI/VDDA/VDDB) domains, with no internal dead-time or overlap protection logic.

Unlike HS/LS variants (e.g., SI8230/3), the SI8232AB-D-ISR is a true dual driver: inputs VIA and VIB directly control outputs VOA and VOB respectively with immediate (no-delay) transitions, supporting independent switching in synchronous rectification, dual-phase converters, or isolated half-bridge configurations where external timing control is retained.

Key Specifications

Pinout & Package

SI8232AB-D-ISR uses a 16-pin SOIC narrow-body package (7.5 mm width) with creepage/clearance optimized for 2.5 kVRMS isolation. Pin functions are validated per Skyworks Si823x Final Data Sheet Figure 3 and Table 5 (Dual Driver Truth Table).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8232AD-D-IS, SI8232AB-D-ISR trades isolation margin for smaller SOIC-16 narrow-body footprint and lower cost in 250–400 VAC systems; versus UCC5390SCDR, it provides true dual-channel independence and split-output supplies at lower peak current - making it optimal for space-constrained, thermally demanding dual-switch applications where timing fidelity and supply flexibility outweigh raw drive strength.

Availability

SI8232AB-D-ISR is available at Aetrix Electronics and suitable for motor control systems, solar inverters, onboard chargers, and battery management systems requiring stable component supply, long-term lifecycle support, and automotive-grade traceability.

Supply support for SI8232AB-D-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, with leadership in RF, isolation, and precision timing technologies.

The Si823x family was designed specifically for robust, high-speed isolated gate driving in automotive and industrial power electronics - emphasizing low propagation delay, high CMTI, and AEC-Q100-compliant reliability across temperature and voltage extremes.

FAQ

What is the isolation voltage rating of the SI8232AB-D-ISR?

The SI8232AB-D-ISR has a certified 2.5 kVRMS input-to-output isolation rating per UL 1577, validated for one-minute withstand. This rating applies to the SOIC-16 narrow-body package and supports reinforced insulation in systems up to 400 VAC working voltage, such as solar inverters and onboard chargers. The SI8232AB-D-ISR does not meet 5 kVRMS requirements - for those, SI8232AD-D-IS is the direct package-compatible alternative.

Does the SI8232AB-D-ISR include built-in dead-time control?

No, the SI8232AB-D-ISR is a dual-driver configuration with no internal dead-time generation or overlap protection logic. Its truth table (Table 5 in Skyworks' datasheet) confirms immediate, independent output transitions based on VIA and VIB states. This design gives full timing control to the external controller - unlike HS/LS variants (e.g., SI8230/3) which integrate programmable dead time. SI8232AB-D-ISR is intended for applications requiring zero-delay or externally managed timing.

What are the supply voltage requirements for SI8232AB-D-ISR?

The SI8232AB-D-ISR requires three independent supplies: VDDI (4.5–5.5 V, with 5 V UVLO threshold) powers the isolated input side; VDDA and VDDB (10–24 V each) power the respective output driver stages. All supplies must be referenced to their dedicated grounds (GNDI, GNDA, GNDB). The SI8232AB-D-ISR will hold VOA and VOB low if any supply falls below its UVLO threshold - a fail-safe behavior confirmed in Section 2.6 of the datasheet.

Can SI8232AB-D-ISR drive SiC or GaN MOSFETs?

Yes, the SI8232AB-D-ISR can drive discrete SiC and GaN MOSFETs requiring ≤0.5 A peak gate current and ≤50 nC total gate charge at ≤1 MHz switching frequencies. Its 45 ns propagation delay, >35 kV/µs common-mode transient immunity (CMTI), and rail-to-rail output swing support fast, clean switching. However, for higher gate charge devices (>70 nC) or >2 MHz operation, a higher-current driver like SI8235AB-D-ISR (4 A version) is recommended.

Is SI8232AB-D-ISR pin-compatible with other Si823x variants?

SI8232AB-D-ISR is pin-compatible with all Si823x SOIC-16 narrow-body variants (e.g., SI8232BB-D-IS1, SI8232AB-D-IS1), sharing identical pinout, footprint, and supply connections. However, it is not functionally interchangeable with HS/LS variants (e.g., SI8230/3) due to absence of dead-time logic and different truth-table behavior. Always verify configuration (dual vs. HS/LS) and isolation rating (2.5 vs. 5.0 kVRMS) before substitution - SI8232AB-D-ISR remains a dual-driver with 2.5 kVRMS isolation.