Skyworks Solutions Inc. SI8235AB-D-ISR

Overview

SI8235AB-D-ISR from Skyworks Solutions is a dual-channel isolated gate driver IC with 4.0 A peak output current per channel, 2.5 kVRMS input-to-output isolation, and TTL-compatible dual-input (VIA/VIB) logic interface. It operates across –40°C to +125°C, supports up to 8 MHz switching frequency, and features independent UVLO (5 V threshold) on each output side - designed for half-bridge MOSFET/IGBT drive in industrial inverters and battery management systems.

For engineers reviewing the SI8235AB-D-ISR datasheet, SI8235AB-D-ISR pinout, SI8235AB-D-ISR application, or SI8235AB-D-ISR equivalent, this page delivers verified specifications, SOIC-16 narrow-body package details, dual-driver functional context, automotive-grade qualification status, and real-world design implications for isolated power stage control.

Technical Context

The SI8235AB-D-ISR implements two fully isolated gate drive channels using Skyworks' proprietary RF-based silicon isolation barrier, enabling independent ground referencing for VOA and VOB outputs. Each channel features TTL-level inputs with >400 mV hysteresis and operates without startup initialization or external clocking.

Unlike high-side/low-side variants (e.g., SI8233), this dual-driver configuration lacks programmable dead time or overlap protection - outputs respond immediately to input transitions with no internal delay. Its 2.5 kVRMS isolation rating complies with UL 1577, CSA 62368-1 (reinforced), and VDE 60747-17 (basic insulation).

Key Specifications

Pinout & Package

SI8235AB-D-ISR is housed in a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length), rated for 260 °C peak reflow per JEDEC J-STD-020. Creepage and clearance meet 2.5 kVRMS system-level requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8235AD-D-ISR, SI8235AB-D-ISR reduces isolation margin to optimize cost and size for non-medical industrial systems; versus UCC5390SCDR, it retains dual-input flexibility and per-rail UVLO at the expense of slightly lower isolation and sink current.

Availability

SI8235AB-D-ISR is available at Aetrix Electronics and suitable for industrial inverters, solar MPPT converters, and battery management systems requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.

Supply support for SI8235AB-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, timing, and isolation technologies.

The Si823x family was engineered to replace optocouplers in high-reliability power conversion systems, delivering robust RF-based isolation, fast propagation, and AEC-Q100 qualification for automotive and industrial gate drive applications.

FAQ

What is the isolation voltage rating of the SI8235AB-D-ISR?

The SI8235AB-D-ISR provides 2.5 kVRMS input-to-output isolation per UL 1577 for one minute. This rating applies across the full operating temperature range (–40°C to +125°C) and supports reinforced insulation per CSA 62368-1 in industrial power systems. It is distinct from the 5.0 kVRMS variant (e.g., SI8235AD-D-ISR) and must be selected based on system-level safety certification requirements.

Does the SI8235AB-D-ISR support programmable dead time?

No, the SI8235AB-D-ISR does not support programmable dead time or overlap protection. As a dual-driver (not high-side/low-side) variant, it lacks the DT pin and internal logic for inter-channel timing control. Outputs VOA and VOB transition immediately in response to VIA and VIB inputs - making it ideal for independent switch control, not half-bridge complementary drive with enforced dead time.

What are the UVLO thresholds for SI8235AB-D-ISR supply rails?

The SI8235AB-D-ISR features independent 5 V UVLO thresholds on all three supply domains: VDDI (input side), VDDA (output channel A), and VDDB (output channel B). Each rail must exceed 5 V to exit UVLO and enable output functionality. This prevents partial activation - for example, VOA remains low if VDDA is below 5 V, even when VDDI and VDDB are valid.

Is SI8235AB-D-ISR pin-compatible with other Si823x variants?

Yes, SI8235AB-D-ISR shares the same SOIC-16 narrow-body footprint and pinout with all Si823x dual-driver variants (e.g., SI8232AB-D-ISR, SI8235BB-D-ISR). However, electrical differences exist: SI8235AB-D-ISR delivers 4.0 A peak output (vs. 0.5 A for SI8232 variants) and uses 2.5 kVRMS isolation (vs. 3.75 or 5.0 kVRMS in other AB-suffix parts). PCB layout is reusable, but system-level validation is required for current and isolation compliance.

What certifications apply to SI8235AB-D-ISR?

SI8235AB-D-ISR is AEC-Q100 qualified (Grade 1), UL 1577 recognized (2.5 kVRMS), CSA certified to 62368-1 (reinforced insulation), and VDE certified to 60747-17 (basic insulation). It also meets RoHS and JEDEC reflow standards. Automotive-grade documentation (PPAP, IMDS/CAMDS) is available for SI8235AB-AS - the automotive counterpart with identical electrical specs and marking.