TPS2393A

TPS2393A ą -48ĆV HOT SWAP WITH INSERTION AND REMOVAL DETECTION DELAY SLUS610 − JULY 2004 FEATURES D Wide Input Supply Range: −20 V to −80 V D Transient Rating to −100 V D Insertion/Removal Detection Delay D Extended Debounce Delay D Programmable Current Limit D Programmable Current Slew Rate D Programmable UV/OV Thresholds/Hysteresis D Open-Drain Power Good (PG) Output D Fault Timer to Eliminate Nuisance Trips D Open-Drain Fault Output (FAULT) D 14-Pin TSSOP package APPLICATIONS D −48-V Distributed Power Systems D Central Office Switching D Wireless Base Station DESCRIPTION The TPS2393A integrated circuit is a hot swap power manager optimized for use in nominal −48-V systems. It operates with supply voltage ranges from −20-V to −80-V, and is rated to withstand spikes to −100 V. In conjunction with an external N-channel FET and sense resistor, it can be used to enable live insertion of plug-in cards and modules in powered systems. It provides load current slew rate control and peak magnitude limiting. Undervoltage and overvoltage shutdown thresholds are easily programmed via a three-resistor divider network. In addition, two active-low, debounced inputs provide plug-in insertion and removal detection. The associated debounce delay applies to both actions. A power good (PG) output enables downstream converters. The TPS2393A also provides the basic hot swap functions of electrical isolation of faulty cards, filtered protection against nuisance overcurrent trips, and single-l...