Datasheet

TPS2480
TPS2481
www.ti.com SLUS939B –APRIL 2010–REVISED DECEMBER 2010
Automatic Restart (Figure 16)
The TPS2481 automatically initiates a restart after a fault has caused it to turn off the external FET. Internal
control circuits use C
T
to count 16 cycles before re-enabling the external FET. This sequence repeats if the fault
persists. The TIMER has a 1:10 charge-to-discharge current ratio, and uses a 1-V lower threshold. The fault-retry
duty cycle specification quantifies this behavior. This small duty cycle often reduces the average short-circuit
power dissipation to levels associated with normal operation and reduces the need for additional protection
devices.
Figure 16. TPS2480/81 Restart Cycle Timing
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