This document introduces the features and applications of LTC4261 Hot Swap™ controller. The controller can monitor current and voltage, and provide overcurrent protection.
This document presents design notes for the LTC4261 Hot Swap controller within the AdvancedTCA modular computing architecture. It addresses challenges such as managing high inrush currents during card insertion and monitoring power distribution in -48V systems.
The text details two primary circuit solutions: using MOSFETs with the LTC4354 diode OR driver to reduce dissipation compared to traditional Schottky rectifiers, and implementing a compact capacitor charging scheme to meet Zero Volt Transient requirements without bulky high-voltage components.
The system allows a power draw of up to 200W per front board.
The maximum load current falls in the 4A to 5A range.
8 square inches of board area are needed to satisfy the heat sinking requirements.