SI8235BD-D-ISR Isolators

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The SI8235BD-D-ISR is an isolated gate driver manufactured by Silicon Labs. It is designed for driving IGBTs and MOSFETs in applications requiring isolation, such as motor drives, industrial automation and power systems. The device features input isolation of up to 6 kV, output switching capability up to 10 A, and operating temperatures from -40°C to +150°C.

The SI8235BD-D-ISR belongs to the class of Isolators - Gate Drivers, which are used throughout the Industrial Automation, Factory, Process Control and Power Supply disciplines. The key purpose of Gate Drivers is to transfer electrical power between two isolated sections, or transform power levels, so that they can be safely exchanged across the isolation barrier. By isolating the two circuits, the Gate Driver can protect both circuit sections from damage due to voltage/current differences, as well as provide galvanic isolation.

The working principle behind the SI8235BD-D-ISR is that it contains a DC-AC Voltage Isolator, which takes in a DC voltage from the input side and converts it into an isolated AC voltage on the other side. A Gate Driver IC is then placed in between the voltage isolator and the load, in order to control the flow of power from the input side to the output side. The Gate Driver IC is then used to drive an opto-coupler, which passes the input signal through the isolation barrier in order to control the output load.

The DC input is usually a user defined voltage, and can range from 12V to 48V. The input is connected to the primary side of the voltage isolator and then fed to the Gate Driver IC. The Gate Driver IC will then use the input voltage to control the opto-coupler when it receives a signal from the input side. The opto-coupler will then pass the signal through the isolation barrier to the output side, where it will control the output load.

The SI8235BD-D-ISR offers the high level of isolation needed for a gate driver and also provides the flexibility of using different voltage ranges for the input side. Additionally, it can provide up to 10A current on the output side, making it suitable for high power applications. The device is also capable of operating at temperatures ranging from -40°C to +150°C, making it suitable for harsh environmental applications.

The SI8235BD-D-ISR is the ideal choice when it comes to driving IGBTs and MOSFETs in applications requiring isolation. With its high level of isolation, flexible input voltage range and operating temperature capabilities, the SI8235BD-D-ISR can be used in numerous applications including motor drives, industrial automation and power systems.

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