SI8281CC-ISR

Si8281/82/83/84 Data Sheet SiC FET-Ready ISODrivers with Integrated DC-DC Converters KEY FEATURES The Si828x family (Si8281/82/83/84) is comprised of isolated, high-current gate drivers with integrated system safety and feedback functions. These devices are ideal for driving Silicon Carbide (SiC) FETs, power MOSFETs, and IGBTs used in a wide variety of inverter and motor control applications. The Si828x isolated gate drivers utilize Skyworks' proprietary silicon isolation technology, supporting up to 5.0 kVrms withstand voltage per UL1577. This technology enables higher-performance, reduced variation with temperature and age, tighter part-to-part matching, and superior common-mode rejection compared to other isolated gate driver technologies. In addition to the gate driver, the Si828x family integrates a dc-dc controller for simple implementation of an isolated supply for the driver side. The Si828x dc-dc controller can be ordered in two different configurations depending on what system voltage rails are available and the amount of power needed. The Si8281 and Si8283 have integrated power switches but are limited in dc-dc voltage input to the device bias. The Si8282 and Si8284 utilize an external power switch and are able to accept much higher voltage input power. User-adjustable frequency for minimizing emissions, a soft-start function for safety, and shut-down capability are available options. The device requires only minimal passive components and a miniature transformer. • System Safety Features • DESAT detection • FAULT feedback • Undervoltage Lock Out (UVLO) including 13 and 15 V for SiC FET • Soft shutdown on fault condition • Ultra-fast short circuit protection