TPS2493PWR

The analog current monitor output of the TPS2492 and TPS2493 controllers provides a signal ready for sampling with an external A/D converter. It includes features such as programmable overvoltage and undervoltage shutdown, power-good for coordinating loads within rush, and a fault indicator to indicate an over-current shutdown. The output also offers a maximum output voltage of VCC–VSENSE=200mV, with a source current of 1.9 mA and a sink current of 60 µA. The gain is specified as 46-50V/V, with an offset voltage ranging from -50 to 30mV. The error relative to curve fit is less than 5mV, and the output ripple is 8 mVPP. These parameters are provided for reference only and do not constitute part of TI's published device specifications for purposes of TI's product warranty.

The TPS2492/93 hotswap controllers feature adjustable under-voltage and over-voltage lockout, turn-on inrush limit, high-side gate drive for an external N-channel FET, FET protection (power limit and current limit), adjustable overload timeout, output current monitor, status output, charge-complete indicator for downstream converter sequencing, and optional automatic restart mode. The power-limiting FET protection allows independent control of current limit, power limit, and overload time to protect the FET and control temperature rise. The controllers also offer programmable FET power limit, load current limit, fault timer, power good and fault outputs, enable/UV, OV inputs, latch or auto restart after fault, and analog current monitor output for sampling with an external A/D converter. Additional features include inrush current limiting, controlled load turn-on, interfacing to downstream DC-to-DC converters, power feed protection, and programmable overvoltage protection.

The TPS2492 and TPS2493 hotswap controllers mentioned in the PDF are designed for controlling load power and providing protection in systems. They are specialized forms of foldback output limiting, which help in preventing overheating and failure due to prolonged exposure to an output short. These controllers also help in controlling and sequencing downstream DC/DC converters, ensuring stable operating points and preventing the system from starting prematurely. Additionally, they feature IMON filtering to reduce residual noise on the IMON output and provide accurate thermal performance validation tools. The TPS2492 and TPS2493 controllers are essential for efficient power management and protection in various systems.