Datasheet

*Default: AsdeterminedbyCL
OC – Overcurrent
HS – Hardshort
V =L
IN
Reset
V =H
ON=L (Default)
IN
ON=H
ON:L H→
OClimit=
H
t =
6S
TIMEOUT_5S
ON=H
Switch=Open
OCsignal=L
OClimit=
H
ON=H
Reset
t
TIMEOUT_5S
Switch=Open
OCsignal=L
ON=L
Switch=Open
OCsignal=H
OClimit=
H
t
=8ms
TIMEOUT_600mA
Switch=Closed
Blanking=Waitfor
10ms
Currentislimited.
Thermalcircuit
isenabled.
AutoRestart=Waitfor
70ms
Currentlimit=600mA
Startt =8ms
TIMEOUT_600mA
Setcurrentlimitback
todefault*
Switch=Closed
Waitfor63.5mS
Startt
TIMEOUT_5S
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No Yes
No
No
No
Yes
ModerateOCdetect
ON=0.5ms
No
A
B
C
-Commontoallthedetectionschemes
-CommontoOCandHSmodeonly
D
IfatanytimeON:H L,then
switchreturnstothisstate
→
Reset
t
TIMEOUT_5S
Reset
t
TIMEOUT_5S
TPS22946
www.ti.com SLVS984A –SEPTEMBER 2009–REVISED FEBRUARY 2010
Figure 2. Moderate Over-Current Detection Flow Diagram
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