TPS2393

www.ti.com TPS2392 TPS2393 SLUS536C − AUGUST 2002 − REVISED AUGUST 2004 FULLĆFEATURED -48ĆV HOT SWAP POWER MANAGER FEATURES D Wide Input Supply Range: −20 V to −80 V D Transient Rating to −100 V D Programmable Current Limit D Programmable Current Slew Rate D Programmable UV/OV Thresholds/Hysteresis D Debounced Insertion Detection Inputs D Open-Drain Power Good (PG) Output D Fault Timer to Eliminate Nuisance Trips D Open-Drain Fault Output (FAULT) D Enable Input (EN) D 14-Pin TSSOP package D 44-Pin TSSOP Package for Creapage/Clearance APPLICATIONS D −48-V Distributed Power Systems D Central Office Switching D Wireless Base Station DESCRIPTION The TPS2392 and TPS2393 integrated circuits are hot swap power managers optimized for use in nominal −48-V systems. They operate with supply voltage ranges from −20-V to −80-V, and are rated to withstand spikes to −100 V. In conjunction with an external N-channel FET and sense resistor, they can be used to enable live insertion of plug-in cards and modules in powered systems. Each device 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 detection. A power good (PG) output enables downstream converters. The TPS2392 and TPS2393 also provide the basic hot swap functions of electrical isolation of faulty cards, filtered protection against nuis...