SI8423BB-D-ISR

Digital isolators are integrated circuits which are designed to provide isolation between a digital logic circuit and other sensitive circuits. Digital isolators provide isolation between devices in order to protect against EMI and voltage surge. They are commonly used in industrial, medical, telecom, and automotive applications.

The SI8423BB-D-ISR is a isoPower digital isolator from Silicon Laboratories., Inc. It is an isolated, low power, non-isolated voltage regulator that provides reliable power conversion for isolation-interfacing applications. It provides isolation of up to 10kV and can be used in a variety of digital isolator applications.

The SI8423BB-D-ISR application field and working principle can be divided into two parts. Firstly, as a supporting power source, this digital isolator ideal for industrial and process control applications with its wide range of current and voltage output options. With its built-in protection circuitry, the digital isolator can withstand high transient voltages as well as on/off operations and EFT (electrical fast transient) surges. Secondly, the operation principle of the SI8423BB-D-ISR is based on a unique isolation architecture using Silicon Laboratories proprietary digital isolator technology. The digital isolator consists of an isolated and non-isolated power supplies which are linked using a proprietary low power transformer. The digital isolator supports two supply voltages, an isolation supply (VIs) and a non-isolated supply (VN). The ISO and NISO voltages are then regulated using an internal buck buck-boost regulator providing a stable, regulated voltage source for the isolation cell.

In addition, the SI8423BB-D-ISR offers fully integrated isolation protection features to prevent damage to the device from EMI, voltage surge, or other transient events. The isolation voltage is up to 10kV, allowing for line isolation up to EN 61000-4-2 (-4 kV) and reinforced insulation up to EN 61800-5-2(-2 kV). The digital isolator also includes a failsafe overvoltage/overcurrent protection circuit which prevents damage to the device due to electrostatic discharge (ESD) or other transient events.

Overall, the SI8423BB-D-ISR is a high-performance digital isolator offering a low-power, reliable power conversion for isolation-interfacing applications. Its extensive protection circuitry and efficient operation make it an ideal choice for a variety of applications, from industrial and process control, to automotive, telecom, and medical.