Skyworks Solutions Inc. SI8237BB-D-IS1

Overview

SI8237BB-D-IS1 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 across –40°C to +125°C and supports isolated MOSFET/IGBT drive in half-bridge configurations for industrial inverters and motor control systems.

For engineers reviewing the SI8237BB-D-IS1 datasheet, SI8237BB-D-IS1 pinout, SI8237BB-D-IS1 application, or SI8237BB-D-IS1 equivalent, this page delivers verified electrical parameters, dual-driver functional context, isolation safety certifications (UL 1577, VDE 60747-17), and real-world use cases in solar inverters and onboard chargers - all confirmed against Skyworks' December 2024 final datasheet (206326B).

Technical Context

The SI8237BB-D-IS1 implements two independent RF-modulated isolation channels using Skyworks' proprietary silicon barrier, enabling simultaneous high-side and low-side gate drive without overlap risk. Each channel features undervoltage lockout (UVLO) with 8 V turn-on threshold and operates up to 8 MHz switching frequency.

Unlike HS/LS variants (e.g., SI8230/3), SI8237BB-D-IS1 lacks programmable dead time or overlap protection - its dual-driver architecture provides immediate, independent output transitions per Table 5 of the datasheet. Input logic is TTL-compatible with VIA/VIB control, and outputs are fully isolated with ±1500 VDC driver-to-driver differential voltage capability.

Key Specifications

Pinout & Package

SI8237BB-D-IS1 uses a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width, 10.3 mm length) with creepage ≥4.2 mm and clearance ≥3.2 mm per IEC 60664-1 for 2.5 kVRMS working voltage.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si8232BB-D-IS1, SI8237BB-D-IS1 is electrically and mechanically identical; compared with ADUM4223BRIZ, it delivers matched 0.5 A drive with lower quiescent current and smaller layout footprint - making it the preferred choice for cost-sensitive, thermally constrained 2.5 kVRMS dual-driver applications.

Availability

SI8237BB-D-IS1 is available at Aetrix Electronics and suitable for industrial inverters, solar power conversion, and onboard EV chargers requiring stable component supply, long-term lifecycle support, and automotive-grade traceability options.

Supply support for SI8237BB-D-IS1 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 designed specifically for robust, high-speed isolated gate driving in power electronics - targeting motor control, renewable energy, and electrified transportation systems where reliability, noise immunity, and compact integration are critical.

FAQ

What is the isolation voltage rating of SI8237BB-D-IS1?

The SI8237BB-D-IS1 has a certified 2.5 kVRMS input-to-output isolation rating per UL 1577, validated for one-minute withstand testing. This rating supports reinforced insulation in 250–400 VAC industrial systems and complies with VDE 60747-17 basic insulation requirements. The device also sustains up to 1500 VDC driver-to-driver differential voltage, enabling safe operation across split-rail gate drive configurations.

Does SI8237BB-D-IS1 include programmable dead time?

No, SI8237BB-D-IS1 does not include programmable dead time or overlap protection. As a dual-driver variant (per Table 2 and Table 5 of the datasheet), it provides independent, immediate output transitions - unlike HS/LS versions (e.g., SI8230/3). This makes SI8237BB-D-IS1 ideal for applications requiring asynchronous or separately controlled high-side and low-side gates, such as three-phase inverter leg drivers or isolated half-bridge topologies with external timing control.

What are the UVLO thresholds for SI8237BB-D-IS1?

The SI8237BB-D-IS1 features an 8 V rising UVLO threshold and 7.2 V falling threshold on the input supply (VDDI), and independent 8 V UVLO on each output supply rail (VDDA and VDDB). When any supply falls below its UVLO threshold, the corresponding output (VOA or VOB) is forced low - preventing unintended switching during brown-out or startup conditions. This behavior is confirmed in Section 2.6 of the December 2024 datasheet.

Can SI8237BB-D-IS1 drive SiC MOSFETs?

Yes, SI8237BB-D-IS1 can drive SiC MOSFETs in applications up to 100 kHz switching frequency, provided gate resistance and layout minimize ringing. Its 100 kV/µs common-mode transient immunity (CMTI), 45 ns propagation delay, and 0.5 A peak output support robust gate control for 650 V/1200 V SiC devices in PFC and DC/DC stages. For >200 kHz operation or higher peak current demands, Skyworks' 4 A variants (e.g., SI8238BB-D-IS1) are recommended.

Is SI8237BB-D-IS1 pin-compatible with other Si823x dual drivers?

Yes, SI8237BB-D-IS1 is pin-compatible with all Si823x dual-driver variants in SOIC-16 narrow-body packaging, including SI8232BB-D-IS1, SI8235BB-D-IS1, and SI8237AB-D-IS1. Pin functions (VIA, VIB, VOA, VOB, DISABLE, GNDI, GNDA, GNDB, VDDI, VDDA, VDDB) match identically across these OPNs. Differences lie only in isolation rating (2.5/3.75/5.0 kVRMS), UVLO threshold (5 V or 8 V), and peak output current (0.5 A or 4.0 A) - all documented in Table 1 of the datasheet.