SI8261BCD-C-ISR

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The SI8261BCD-C-ISR is a single chip isolator in the Isolator category, specifically in the Gate Drivers subgroup. It is commonly used in applications such as motor control, power management, and other logic-level signal isolation. This chip’s main purpose is to increase noise immunity, scalability, and efficiency. This article will discuss the application field and working principle of the SI8261BCD-C-ISR.

Applications of SI8261BCD-C-ISR

The SI8261BCD-C-ISR can be used in a variety of different applications as a gate driver for logic-level signals. This isolator is especially suited for driving high-side and/or low-side MOSFETs in motor control applications due to its capability for handling high peak current pulses. It is more efficient than other solutions due to its low power consumption. Additionally, due to its robust isolation performance, its applications include power management (such as motor control, motor drive, and power supply), as well as industrial, medical, and communication systems.

The SI8261BCD-C-ISR also supports anti-ringing technology which reduces switching noise and extends the life of a system by suppressing ringing. This isolator is capable of providing isolated power with full galvanic isolation, which is ideal for applications demanding high reliability and noise immunity.

Working Principle of SI8261BCD-C-ISR

The SI8261BCD-C-ISR is an isolator that uses a transformer-bounded inductor and capacitive coupling to achieve galvanic isolation. This isolator consists of three isolated subsystems — two isolated primary and secondary subsystems and a control subsystem. The control subsystem consists of two CMOS-based low-power inputs, wherein one input is used to control the operation of the other, and a control output port which generates a signal based on the logic level of both inputs. This signal is then routed to the isolated subsystems, where it triggers the load and/or power circuit.

The primary subsystem of the SI8261BCD-C-ISR consists of a transformer-coupled inductor and capacitive coupling for isolation. The transformer-coupled inductor supports high-frequency noise suppression, while the capacitive coupling also features a metal-oxide varistor for suppressing severe electrical transients. The secondary subsystem consists of two MOSFETs (N- and P-channel) which are triggered by the control output port. The MOSFETs can then be used to switch on and off the load or power connection between the primary and secondary subsystems, depending on their configuration.

The SI8261BCD-C-ISR is a highly efficient, low power, and highly reliable chip suitable for a range of motor control and power management applications. Its transformer-coupled inductor and capacitive coupling help to enhance noise immunity and scalability, while its anti-ringing technology can help to reduce switching noise and extend system life. Additionally, the chip’s low power nature makes it an ideal solution for applications demanding energy efficiency.

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