UCC3921DTR

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Power Management Integrated Circuit (PMIC) technology is developing rapidly to keep up with the ever-growing and increasingly demanding needs of modern systems. Hot Swap Controllers are one of the most important components of a PMIC and they play an important role in the protection and regulation of a power system. The UCC3921DTR is a versatile Hot Swap Controller and is used in many applications to protect and manage power systems.

The UCC3921DTR is a controller featuring integrated Dual N-channel MOSFET output devices, specifically designed for cost-sensitive applications. It represents a cost-effective way for switching and controlling power in Hot Swap applications where tight load voltage and current control is required. The dual N-channel MOSFETs support simultaneous load currents up to 4.5A and are able to sink and source. They are highly efficient, allowing the UCC3921DTR to deliver low-cost and effective protection, current regulation, and power management in a wide range of challenging applications.

One of the major benefits of this Hot Swap controller is its wide range applications. With its ruggedized design, it provides overvoltage, undervoltage, and overcurrent protection. It is suitable for Hot Swap backplane and board level designs, enabling efficient insertion and removal of boards with the system at full power. It also provides low-voltage protection to avoid random system resets when the power supply is below a threshold. Additionally, the UCC3921DTR features two voltage-controlled current sources that allow two independent circuits to have an always-on diagnostic supply. Other applications include powering small brushless DC motors, modems, and microcontrollers.

The UCC3921DTR works on the principle of using two N-channel MOSFETs to provide a regulated current output at a constant voltage. It is implemented in a low profile 8-pin package, allowing for the integration of over voltage protection, along with input voltage and current monitoring. The integrated MOSFETs can sink and source up to 4.5A of load current, providing ideal performance for applications requiring good power efficiency and accurate control of the load voltage. The UCC3921DTR also features overcurrent protection (OCP), optical isolation,Thermal Shutdown (TSD), Overvoltage Protection (OVP), and Undervoltage Protection (UVP) functions.

The UCC3921DTR Hot Swap controller is an ideal solution for improving system performance by providing reliable and cost-effective operation in power-sensitive applications. With its integrated dual MOSFETs, OVP/UVP protection, overcurrent protection, and optical isolation, it offers a wide range of features for both power supply and load control. It is designed to offer low-cost and high performance solutions for Hot Swap applications, enabling safe, fast, and reliable insertion and removal of boards with a regulated output voltage.

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