Datasheet

LOAD 1
POWER
SUPPLY 1
+V
GND
+12V
GND
POWER
SUPPLY 2
+12V
GND
+12V
GND
+12V
GND
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Figure 4. Redundant Power Supply
Jumper Configurations:
J20 and J22 Jump to enable the retry on fault option for each respective channel. Leave open to latch
channel off on fault.
J24 and J25: leave open to enable the OR-ing transistors. The OR-ing transistors must be used in this
configuration to prevent cross current conduction between input power sources.
J10 jump pin 1 to pin 2 (Each). Each channel has individual peak current limit which protects the input
supplies from overcurrent conditions. The load can draw up to 2 times the current limit of a single channel
in this configuration. If the load rather than the input power source needs to be protected from overcurrent
then jump pin 2 to pin 3 on J10 (Total). The total current draw from the input power supply flowing to the
load is limited to the peak current limit. Note the OR-ing fets act as diodes so current sharing is not
ensured.
5
SLVU368–March 2010 TPS2456EVM
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