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TPS2399DGKR
Simple -48V Hot Swap Controller with Enable
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SLUS562A − JUNE 2003 − REVISED SEPTEMBER 2003
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FEATURES Wide Input Supply Range: −36 V to −80 V Transient Rating to −100 V Improved Transient Response Enable Input (EN) Programmable Current Limit Programmable Current Slew Rate Fault Timer to Eliminate Nuisance Trips Open-Drain Power Good Output (PG) 8-Pin MSOP Package⋅APPLICATIONS
−48-V Distributed Power Systems Redundant Negative Voltage Supplies Central Office Switching
DESCRIPTIONThe TPS2398 and TPS2399 integrated circuits
are hot swap power managers optimized for use
in nominal −48-V systems. For redundant-supply
systems, they incorporate an improved circuit
breaker response that provides rapid protection
from short circuits, while still enabling plug-ins to
tolerate large transients that can be generated by
the sudden switchover to a higher voltage supply.
They are designed for supply voltage ranges up 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. Both devices provide load current slew
rate and peak magnitude limiting, easily
programmed by sense resistor value and a single-
external capacitor.
APPLICATION DIAGRAMUDG−03069
0.02 Ω
−48V_INA
VOUT+
VOUT−
−48V_INB
−48V_RTN
IRF530
