SI8261BCD-C-IM

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Isolators, or isolation amplifiers, are integrated circuits (ICs) that provide high-level isolation between two circuits and are widely used in the electronics industry. In particular, the SI8261BCD-C-IM circuit provides reliable isolation between logic and analog circuits. This article looks at the application field and working principle of the SI8261BCD-C-IM.

Application Field

The SI8261BCD-C-IM combines a high-voltage “gate driver” with element isolation. It is most suitable for electronic applications requiring isolation between logic circuits and analog or mixed signal circuits, such as motor drive circuits and LED drives. The circuit enables signal isolation between logic and analog circuits and makes it possible to control and drive low-power circuits from a logic-level input. The isolation level can reach 4000Vrms, which is sufficient in various industrial and commercial applications.

The SI8261BCD-C-IM is used especially in the following applications:

• Motor control system
• Sensor/actuator interface
• AC/DC power supplies
• PC peripherals and memory cards
• Battery-powered devices

Working Principle

The SI8261BCD-C-IM circuit has a built-in single-channel isolated gate driver, which is designed to drive a silicon controlled rectifier (SCR), power MOSFET or IGBT directly. The circuit provides 4000Vrms of isolation between the input side of the circuit and the output side. The output side of the circuit can be connected directly to the gate of the device, eliminating the need for external gate resistors. The circuit also has a current-limiting resistor built in, which limits the current to the device to ensure it is protected against overcurrent.

The SI8261BCD-C-IM circuit has a wide operating voltage range and can operate from -40°C to +85⁰C. The device has a low quiescent current, which makes it suitable for battery-powered applications. It is protected against avalanche, ESD, and reverse voltage.

In summary, the SI8261BCD-C-IM is a reliable isolator that can provide isolation between logic circuits and analog signals, making it suitable for a wide range of applications. The high isolation level makes it suitable for low-power and high-power applications and its wide operating voltage range makes it suitable for battery-powered applications. This makes it an excellent choice for use in motor control systems, LED drives and AC/DC power supplies.

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