SI8281CC-ISR

Isolators - Gate Drivers Overview

The SI8281CC-ISR is a single-channel, galvanically isolated gate driver designed for SiC and IGBT applications. It features integrated DC/DC conversion, eliminating the need for external isolated power supplies. The device operates within a supply voltage range of 2.8 V to 5.5 V and provides peak output currents of 4 A (high-side) and 3 A (low-side). Key electrical parameters include a maximum propagation delay of 50 ns, typical rise time of 5.5 ns, and fall time of 8.5 ns. It offers 5000 Vrms isolation capability with a minimum common-mode transient immunity of 35 kV/µs. The component is housed in a 20-SOIC package and supports an operating temperature range from -40°C to +125°C.

Isolators - Gate Drivers Feature Summary

• Integrates high-voltage DC/DC converter for simplified system design without external isolated bias supplies
• Provides robust galvanic isolation with 5000 Vrms rating and high common-mode transient immunity
• Delivers strong peak drive current suitable for fast-switching wide-bandgap devices like SiC MOSFETs

Isolators - Gate Drivers Applications

• Gate driving for Silicon Carbide (SiC) MOSFETs in high-frequency power converters
• Isolated control interfaces for Insulated Gate Bipolar Transistors (IGBTs)
• Industrial motor drives requiring high reliability and noise immunity
• Solar inverters and uninterruptible power supply (UPS) systems

Isolators - Gate Drivers Procurement Notes

Verify that the specific suffix 'CC' aligns with the required isolation voltage rating and regulatory certifications for your target market. Confirm the 'ISR' suffix corresponds to the tape-and-reel packaging format required for automated surface-mount assembly processes. Ensure compatibility with the host controller logic levels and check for any specific handling requirements related to moisture sensitivity classification.

Isolators - Gate Drivers Selection Notes

Select this component when a single-channel isolated driver with integrated power management is required. It is appropriate for designs prioritizing board space reduction by removing external transformer-based isolated supplies. Consider the 20-SOIC package dimensions for thermal management and PCB layout constraints. Evaluate the 50 ns propagation delay against the switching frequency requirements of the target power stage to ensure adequate timing margins.

Isolators - Gate Drivers Part Context

This part belongs to the Skyworks Si828x family of ISOdriver gate drivers. These devices are engineered specifically for demanding industrial and automotive applications involving high-power semiconductors. The series distinguishes itself by combining signal isolation and power delivery into a single monolithic solution, enhancing system efficiency and reducing component count compared to traditional discrete isolation approaches.

Isolators - Gate Drivers Replacement Considerations

Direct functional substitutes within the same family include the SI8281CD-IS and SI8281CC-IS. When evaluating alternatives, verify that the replacement maintains the same 20-SOIC footprint and pinout configuration to ensure mechanical compatibility. Check if the alternative part number meets the same AEC-Q100 automotive qualification standards if applicable to the end-use environment.