UCC2918DP/81510

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PMIC is Power Management Integrated Circuits, these device are used to regulate and manage the power of an electronic device. Hot Swap Controllers is a type of PMIC that is designed to provide safe power supply and protection when the connected device is being removed, connected, or replaced. They allow the device to be “hot swapped”, which means that it can be safely and quickly disconnected from a power source without causing damage to either the device or the power supplies. A good example of a Hot Swap Controllers is the UCC2918DP/81510.

Application Field of UCC2918DP/81510

The UCC2918DP/81510 is an ideal Hot Swap Controller for data communication and telecommunications systems. It is suitable for applications such as low-speed twisted pair Ethernet, 100Mbit/s copper gigabit Ethernet, and broadband power-over-coax (PoC) applications. The UCC2918DP/81510 can also be used in applications that require input overvoltage protection, such as power over Ethernet (PoE) systems, which require protection from overvoltage when the PoE circuit is enabled. The device is also suitable for use in automotive and industrial systems, including infotainment, gateway, and motor control systems.

Working Principle of UCC2918DP/81510

The UCC2918DP/81510 is a variable-frequency, active-clamp Hot Swap Controller that allows for an uninterruptible, safe power transfer for capacitive or resistive loads. The device has a variable-frequency architecture that enables the controller to operate from a lower frequency to allow for a fast response and to reduce the current and power consumed by the device. The controller provides an active clamp feature to limit the voltage applied when input voltage ramping occurs. This ensures that the output voltage remains within specifications even during input voltage ramping.

The device also provides an over-current and overvoltage detection feature to minimize the power losses during periods of high-current draws that occur when capacitive loads are attached to the device. It also has a fault detection algorithm that allows for detection of a fault condition, such as an open circuit or a exceeded voltage limit, by comparing the voltage at the output pin to the voltage at the internal voltage reference.

The UCC2918DP/81510 also includes a slew-rate limiter feature that limits the rate of change of the output voltage, allowing for reduced current and power consumption. It is also capable of providing monitor and control signals for external passive components. The device also provides a timer circuit that allows for the adjustment of the slew rate of the voltage and current based on the output voltage, current, and temperature.

The UCC2918DP/81510 is designed to provide a reliable and cost-effective solution to allow for hotplugging of power supplies in a variety of applications. The device provides a wide range of features to meet the needs of today\'s complex systems, while providing a high level of safety and reliability.

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