SI8286CD-IS

The SI8286CD-IS are designed to provide isolation in power control applications. This is typically done by providing a low current gate drive signal for a power MOSFET or IGBT. They are part of a class of components known as Gate Drivers which provide protection from destructive current surges produced by switching power devices, particularly in power supplies, motor drives, PLCs, inverters and solar inverters.

The SI8286CD-IS gate driver consists of two isolated half-bridge circuits, each containing two channel drivers, one for each direction. It supports a wide range of gate drive sources, such as a transistor bridge, PWM signals, Hall signals, or encoder signals. Building on the widely used SI8261CD-IS gate driver, the SI8286CD-IS is able to deliver up to ±15-V gate drive voltages with pulse currents up to 11 A.

The SI8286CD-IS provides up to 6-kV rms isolation between the input and the output. A novel dynamic offset-cancellation scheme is used to effectively reduce inductive parasitics in power switch applications, allowing the combination of a standard optical isolator with an IGBT driver to achieve advanced isolation.

The SI8286CD-IS includes a soft-start circuit to reduce inrush current requirements, an active output short-circuit protection to prevent output shorting, and a shutdown circuit to deactivate the output for protecting related circuits. Furthermore, the effect of CV offsets is minimized by the precision trimming of the gate drive current, reducing the RC time constant requirements. Plus, the bridged outputs and integrated MOSFET shunts of channel 1 and 3 of the isolate sides offer a robust high-current transfer solution with a low thermal resistance.

These features make the SI8286CD-IS well suited for a variety of applications such as motor drives, power supplies, UPSs, solar inverters, PLCs, and other power control equipment where the need for efficient, reliable, and high-powered gate drive isolation are in demand.