UCC3921DTR/81143

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Power management integrated circuits (PMICs) are essential for providing power solutions and a reliable working device to electronic products. PMICs have various features and functions, each device selectable for different uses. One of the PMIC families includes Hot Swap controllers. A Hot Swap controller can prevent destructive in-rush current, which is the sudden surge of current caused by the insertion of power connection. UCC3921DTR/81143 is a Hot Swap controller that is designed to provide reliable and efficient performance. This article will discuss the applications and electrical principles of UCC3921DTR/81143 as a Hot Swap controller.

UCC3921DTR/81143 is a Hot Swap controller designed to meet the security and reliability requirements of modern-day connected systems. It has a wide operating temperature range, making it suitable for many environment settings. The device also has a slew-rate-limiting feedback loop, which is designed to help prevent against transient voltage shocking.

The UCC3921DTR/81143 also possesses a wide range of features that make it an attractive choice for Hot Swap applications. It has an adjustable current sink up to 8A, which is used to regulate the maximum in-rush current. It also has on-board auto-disconnect feature, allowing the device to detect an over-current condition and safely turn the system off. In addition, the device has integrated protection circuitry to provide fault protection, as well as an adjustable timeout to protect against shorted loads. Furthermore, it has an adjustable pre-charge timer and a low power standby mode.

The electrical principles of the UCC3921DTR/81143\'s design as a Hot Swap controller are based on the use of positive temperature coefficient thermistors. The thermistors are connected in series between the power supply and the load. When the power supply is turned on, the resistance of the thermistor decreases and current will flow to the load. When the current reaches the peak current capability of the thermistor, the resistance increases and cuts off current. This acts as a current limiter, preventing destructive in-rush current.

In addition to its features as a Hot Swap controller, the UCC3921DTR/81143 can be used for many other applications. It can be used for AC-DC converter control, as well as motor control applications. It is also able to provide protective features for DC-DC converters, such as over-voltage, under-voltage, and over-temperature protection.

The UCC3921DTR/81143 is an effective and reliable Hot Swap controller that is suited for many applications. The device is able to prevent destructive in-rush current by using a slew-rate limiting feedback loop and embedded thermistors. The device is also suited for AC-DC converter control, DC-DC converter control, and motor control applications. In addition to its Hot Swap capabilities, the device is also able to provide protections against over-voltage, under-voltage, and over-temperature conditions.

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