Skyworks Solutions Inc. SI82394BD-IS

Overview

SI82394BD-IS from Skyworks Solutions is a high-side/low-side isolated gate driver IC with PWM input control, 4.0 A peak output current, 8 V output UVLO threshold, and programmable dead time (10–200 ns). It features reinforced isolation up to 5 kVRMS, 100 kV/µs CMTI, and fail-safe low-default outputs during VDDI power-down - designed for traction inverters and industrial motor drives.

For engineers reviewing the SI82394BD-IS datasheet, SI82394BD-IS pinout, SI82394BD-IS application, or SI82394BD-IS equivalent, this page delivers verified specifications, SOIC-16 wide-body package details, safety-critical timing behavior, and automotive-grade alternative options aligned with AEC-Q100 requirements.

Technical Context

The SI82394BD-IS implements RF-based on/off keying modulation across its silicon isolation barrier, enabling robust noise immunity without startup initialization. Its dual-channel architecture supports high-side/low-side MOSFET/IGBT drive with independent VDDA/VDDB supplies (10–24 V) and a 2.5–5.5 V input-side VDDI rail.

It integrates enhanced UVLO monitoring per output channel, status feedback via RDY pin, active-high EN control with 100 kΩ pull-down requirement, and programmable dead time (10–200 ns) to prevent shoot-through in half-bridge topologies - all while maintaining fail-safe low outputs during input-side power loss.

Key Specifications

Pinout & Package

SI82394BD-IS is housed in a RoHS-compliant SOIC-16 wide-body package (10.3 mm × 10.3 mm, 2.65 mm height), rated for 260 °C peak reflow per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side/low-side isolated gate driver applications.

Compared with SI82394BD-IS, SI82394BD4-IS adds deglitching and extended dead time for harsher EMI environments, while SI82394CD-IS raises UVLO to 12 V for higher gate-drive-rail stability - both retain AEC-Q100 qualification and SOIC-16 WB compatibility.

Availability

SI82394BD-IS is available at Aetrix Electronics and suitable for traction inverters, on-board chargers, and solar inverters requiring stable component supply with automotive-grade reliability and long-term lifecycle support.

Supply support for SI82394BD-IS 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 Si8239x family was engineered specifically for high-reliability isolated gate driving in automotive and industrial power conversion - replacing optocouplers with silicon-isolated drivers offering superior CMTI, timing precision, and lifetime stability.

FAQ

What is the isolation voltage rating of the SI82394BD-IS?

The SI82394BD-IS provides 5 kVRMS isolation rating per UL 1577, certified for reinforced insulation per IEC 62368-1 and VDE 0884-10. This enables safe operation in 1000 VAC system-level designs such as EV traction inverters and grid-tied solar inverters where creepage and clearance requirements are stringent.

Does the SI82394BD-IS support bootstrap gate drive configurations?

No - the SI82394BD-IS does not support bootstrap configurations. Its VDDA and VDDB supplies must be independently generated (e.g., isolated DC-DC converters), as the device relies on separate, stable 10–24 V rails for each output channel to maintain UVLO monitoring and fail-safe behavior. Bootstrap use would violate the independent supply requirement.

How does the RDY pin function on the SI82394BD-IS?

The RDY pin on the SI82394BD-IS is an open-drain status output that goes high only after both VDDI has exceeded its UVLO threshold and internal power sequencing is complete. It signals to the host controller that VOA and VOB are ready to accept valid PWM input - providing deterministic startup timing critical for functional safety compliance.

What is the purpose of the EN pin on the SI82394BD-IS?

The EN pin on the SI82394BD-IS is an active-high enable input that forces both VOA and VOB low regardless of PWM state when pulled low. It requires a 100 kΩ pull-down resistor to GNDI for fail-safe default-off operation. EN remains inactive if VDDI is below UVLO, ensuring no spurious output activation during power-up.

Can the SI82394BD-IS drive SiC MOSFETs directly?

Yes - the SI82394BD-IS delivers 4.0 A peak source/sink current and 30 ns propagation delay, making it suitable for direct gate driving of discrete SiC MOSFETs with Qg ≤ 50 nC at switching frequencies up to 350 kHz. Its 100 kV/µs CMTI prevents false triggering during fast dv/dt transitions inherent to SiC devices.