SI82395CB-IS1

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Isolators are a type of electrical component used to separate two sections of a circuit and protect one section from the effect of the other. Gate drivers are an essential component of many power electronics systems, used to provide electrical signals to control switching elements such as insulated gate bipolar transistors (IGBTs) and MOSFETs. This article will discuss the application field and working principle of the SI82395CB-IS1 Gate Driver Isolator.

Application Field

The SI82395CB-IS1 is an isolated gate driver for H-bridge circuits used to control low-voltage DC motors. It is capable of providing a maximum output current of 1 A, an input voltage range of 4.5 V to 36 V, and output voltage up to 36 V. This isolator can be used in various motor control application such as gate switching, power switching, and over-current protection.

The SI82395CB-IS1 also has a wide operating temperature range of -55°C to 125°C and built-in thermal-shutdown protection, making it ideal for automotive and industrial applications. Additionally, it features a high-side floating gate drive with low-side floating return voltage, providing increased reliability in noisy or high-dynamic environments. The low power consumption, wide input voltage range, and high-current output make the SI82395CB-IS1 an ideal choice for motor control applications.

Working Principle

The SI82395CB-IS1 Isolated Gate Driver works on the principle of electrical isolation. This isolator uses an integrated oscillator to create isolated drive signals for switching by transforming a control signal into separated, isolated high and low side driver outputs. The internal oscillator allows the SI82395CB-IS1 to be synchronized to the control signal for reliable switching without the need for an external clocking device.

Due to its low input voltage requirement, the SI82395CB-IS1 Gate Driver does not require a high-voltage line to power the internal oscillator, making it suitable for low voltage applications where a higher voltage line may not be available. Additionally, the integrated oscillator eliminates the need for additional external components, contributing to a reduced component count and cost, while providing reliable, error-free operation.

The SI82395CB-IS1 also integrates an advanced protection circuit with both current-limit and overtemperature protection functions, further enhancing its reliability and suitability for motor control applications. The current limit protection circuitry reduces the risk of overdriving the gate drive, while the overtemperature protection circuitry ensures reliable operation in high-temperature environments.

The SI82395CB-IS1 Isolated Gate Driver is an ideal choice for motor control applications that require reliable switching and high-current drive capability. With its wide input voltage range, high-current output, and integrated protection circuitry, the SI82395CB-IS1 is well-suited for a variety of applications, including automotive and industrial applications.

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