The TPS2398 and TPS2399 integrated circuits are hot swap power managers optimized for use in nominal −48 V 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. They also provide single-line fault reporting, electrical isolation of faulty cards, and protection against nuisance overcurrent trips. The TPS2398 latches off in response to current faults, while the TPS2399 periodically retries the load in the event of a fault.
●Features | | Benefits
●---|---|---
● | | | | |
● Wide Input Supply: −36 V to −80 V
●| |
● Wide input voltage range
● Transient Rating to −100 V
●| |
● Withstand input voltage spikes to −100 V
● Improved Transient Response
●| |
● Input current spike suppression during input voltage transient
● Εnable Input (EN)
●| |
● Output voltage could be switched on/off
● Programmable Current Limit
●| |
● Current limit could be set by external resistor
● Programmable Current Slew Rate
●| |
● Current slew rate could be set by external capacitor
● Fault Timer to Eliminate Nuisance Trips
●| |
● Load current spikes shorter than about 4us are ignored
● Open−Drain Power Good Output (/PG)
●| |
● /PG signal could be used to monitor hot-swap status
