UCC3918DP

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Power Management Integrated Circuit (PMIC) devices are extensively used in many different applications. They provide stability, efficiency, and flexibility in the power distribution. Hot Swap Controllers are a particular type of PMIC used to ensure the quick and reliable connection between circuits in high-voltage applications. They provide hot plugging protection and eliminate inrush currents. The UCC3918DP is an advanced Hot Swap Controller developed by Texas Instruments, providing robust protection using completely integrated circuitry.

2.UCC3918DP Overview

The UCC3918DP Hot Swap Controller offers greater design flexibility and system protection with fewer components. It provides an economical, off-the-shelf, complete Hot Swap solution in a single package. The controller is designed to provide both supply rail and discharge protection. It is constructed in a thermally-enhanced 14-pin LLP package and offers ultra-low power consumption of less than 2 mW.

The UCC3918DP provides protection from over-voltage, under-voltage, over-current, and over-temperature conditions. It offers an adjustable threshold voltage for under-voltage protection, adjustable foldback current for over-current protection, and adjustable temperature protection with an internal thermal sensing circuit. It also provides independent under-voltage and over-current fault flags and a power-good indicator.

3. UCC3918DP Application Fields

The UCC3918DP is suitable for many different applications, such as telecom, networking, computer systems, storage systems, industrial automation, and motor control. It enables replacement of costly and complex discrete Hot Swap protection components, while providing a high degree of system reliability. The controller can also be used to protect components in automotive systems, such as LED lighting and displays.

The UCC3918DP is ideal for applications requiring high performance, robust power protection, and minimal power dissipation. It is primarily targeted at high-current/high-voltage systems, where precise control over inrush current is required. It provides precise, adjustable, and dependable Hot Swap protection without the need for external components.

4. UCC3918DP Working Principle

The UCC3918DP Hot Swap Controller is designed to provide low-cost, integrated hot plugging protection. It is based on a dual-NPN, push-pull output stage, for prevent voltage overshoot and discharge protection respectively. The controller is designed to provide one or two output control signals that can be used to control a low-side field-effect transistor (FET) or an optically-isolated power module.

The UCC3918DP uses an internal voltage monitoring circuit to detect under-voltage or over-voltage conditions. When an under-voltage or over-voltage condition is detected, the controller provides an adjustable foldback current to limit the power dissipation and protect the system components. It also incorporates an over-current protection circuit with an adjustable fault threshold.

The controller also features an integrated thermal sensing circuit which provides temperature protection with an adjustable threshold. It can detect small differences in temperature and respond quickly to thermal overload conditions. It is also equipped with fault flags and a power-good indicator to provide vital system status information.

5. Conclusion

The UCC3918DP Hot Swap Controller is a reliable, efficient, and cost-effective solution for high current/high voltage applications. It provides adjustable over-voltage, under-voltage, over-current and over-temperature protection with minimal external circuitry. It also offers power-good indication and fault flags for easy system status monitoring. The controller is ideal for applications requiring robust power protection and minimal power dissipation.

The specific data is subject to PDF, and the above content is for reference