SI8281CC-ISR

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The SI8281CC-ISR is a reliable,high efficiency integrated isolator with integrated gate driver. It is designed for high-speed, high-current, and high-frequency switching applications such as motor and power supplies. The component is built using a proprietary Power Integrated Circuit (PIC) technology, which provides high electro-magnetic interference (EMI) protection, high accuracy, and small size. It is IP68-compatible and is suitable for automotive, industrial, and consumer applications.

Application Field: The SI8281CC-ISR is suitable for a myriad of applications that require high current, high speed operation. These include various motor control applications such as DC brushless motor, stepper motor, AC motor, and factory automation equipment as well as in industrial and consumer applications such as welding power supplies, UPS, EVs, renewable energy systems, LED lighting systems, and inverters. The isolator is also useful for controlling power supplies such as AC/DC, DC/DC, and AC/AC.

Working Principle: The SI8281CC-ISR utilizes a proprietary PIC technology, providing high electro-magnetic interference (EMI) protection, high accuracy, and a small size. The integrated gate driver consists of an N-channel power MOSFET that is connected to an optically coupled P-Channel MOSFET with a series resistor. The N-channel device is connected to the gate of the optically coupled MOSFET; which is further connected to the AC input supply. This combination of devices helps to reduce ringing and enables a robust and reliable gate drive.

The SI8281CC-ISR benefits from the latest in power integrated circuit (PIC) technology. The integrated isolator prevents any electrical noise generated from the AC input supply from affecting the system. The isolation process also safeguards the gate driver from any spikes or AC line drops that may occur during operation.

The SI8281CC-ISR integrates an optimized gating circuit that provides constant charge and discharge cycle to the power MOSFETs, ensuring a smooth and reliable switching process. Additionally, the component features a high-side overvoltage protection of 6.2V and a low-side undervoltage protection of 0.05V; making it ideal for modern power supplies that require fast switching and constant cycle.

In summary, the SI8281CC-ISR is a reliable, high efficiency integrated isolator and gate driver, suitable for high-speed, high-current and high-frequency switching applications. It is IP68- compatible, providing robust protection from environmental factors, and features optimized switching cycle and a high-side/low-side over/under voltage protection for reliability when used in modern power systems.

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