Datasheet

AUX Fault
Fault
350mA
0 mA
Threshold
400to700mA
C
FILTER
Time
TPS2363
www.ti.com SLUS680B –JANUARY 2006–REVISED JANUARY 2010
Selection Trade-Offs
System design determines the controller’s power off characteristics. High-end never-fail systems often use the
current limit function and power off the module when a fault is detected. In these systems it is important that the
module have a chance to recover and the system not hang.
Mid-range servers often use the circuit breakers with fast trip. System power has to be designed to handle these
current loads without the system voltage dropping out of range for the other components in the system.
The module turn-on time is longer with the current limit, this may require a longer fault time to insure that the
module is powered before the fault timer, times out.
The VAUXA/B is unaffected by the FAST trip mode. The over-current shutdown of VAUXA/B is always subject to
the fault timer. An under-voltage turns off immediately with AUXINA/B. See Figure 6.
Figure 6. AUX Fault
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