SI8220CD-A-IS

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Isolators - Gate Drivers

SI8220CD-A-IS is an isolator-gate driver product line developed by Silicon Laboratories Inc. It is designed for lower power and space-saving applications, and provides reliable and cost-effective isolation solutions. This article will discuss the application field and working principle of SI8220CD-A-IS.

Application Field

The SI8220CD-A-IS was developed based on Silicon Laboratories\' patented CMOS technology and delivers a wide range of isolation and bidirectional signal transmission over a distance of up to 12 inches (30.5 cm). It is suitable for a variety of applications, including industrial automation, transportation, medical equipment and renewable energy. Specifically, it can be used in applications such as solar inverters, motor drivers, gas compressors, drives, switches, isolation transmitters, battery management systems and actuators.

The Working Principle

The SI8220CD-A-IS isolator-gate driver provides electrical isolation between two separate, isolated power sources and two connected components. It works by using two high-frequency CMOS oscillators to transmit digital messages between two isolated circuits through a small transformer which is integrated within the package. The SI8220CD-A-IS also incorporates an integrated thin-film-resistor (TFR) which provides electromagnetic interference (EMI) protection. Since the TFR works in conjunction with the isolated power supplies, it ensures that there is no interference between the two power sources. When the voltage differential between the inputs is greater than the voltage threshold of the TFR, the SI8220CD-A-IS will automatically deactivate, thus preventing any leakage current.

The SI8220CD-A-IS also provides galvanic isolation, which prevents electrical current from propagating through the isolation barrier. This is achieved through the use of an integrated isolation transformer which is combined with capacitive and magnetic elements. The magnetic elements form an inductive link between the two isolated power sources, preventing any leakage current from passing through the barrier. The capacitive elements create a high-impedance path which blocks any current from propagating across the barrier.

In addition, the SI8220CD-A-IS incorporates a low-power logic level circuit design which provides a high level of noise immunity, and a high-frequency common-mode transient immunity (CMTI) up to 4 kV/μs. This ensures reliable operation even in noisy or high-voltage environments.

Conclusion

The SI8220CD-A-IS isolator-gate driver is a cost-effective and space-saving solution for providing reliable electrical isolation between two separate power supplies. It works by using a combination of high-frequency CMOS oscillators, an integrated thin-film-resistor, and galvanic isolation techniques which block any leakage current from propagating through the isolation barrier. This product line is suitable for a wide range of applications, such as industrial automation, transportation, medical equipment and renewable energy.

The specific data is subject to PDF, and the above content is for reference