TPS2350

TPS2350 www.ti.com SLUS574D – JULY 2003 – REVISED OCTOBER 2013 Hot Swap Power Manager for Redundant –48-V Supplies Check for Samples: TPS2350 FEATURES 1 Replaces OR-ing Diodes Operating Supply Range of –12 V to –80 V Withstands Transients to –100 V Programmable Current Limit Programmable Linear Inrush Slew Rate Programmable UV/OV Thresholds Programmable UV and OV Hysteresis Fault Timer to Eliminate Nuisance Trips Power Good and Fault Outputs 14-Pin SOIC and TSSOP Package APPLICATIONS –48-V Distributed Power Systems Central Office Switching ONET Base Stations DESCRIPTION The TPS2350 is a hot swap power manager optimized for replacing OR-ing diodes in redundant power –48-V systems. The TPS2350 operates with supply voltages from –12 V to –80 V, and withstands spikes to –100 V. The TPS2350 uses two power FETs as low voltage drop diodes to efficiently select between two redundant power supplies. This minimizes system power dissipation and also minimizes voltage drop through the power management chain. The TPS2350 also uses a third power FET to provide load current slew rate control and peak current limiting that is programmed by one resistor and one capacitor. The device also provides a power good output to enable down-stream power converters and a fault output to indicate load problems. TYPICAL APPLICATION DIAGRAM Power Good Fault (A) D1 3 UV 12 PG 2 FLT 1 RTN TPS2350 GAT 11 SENSE 10 SOURCE 7 4 OV GATA 9 GATB 8 FLTTIM RAMP –VINA –VINB 5 ...