Datasheet

ON=H
ON=
Edge
HSsignal
=H
t =
6S
TIMEOUT_5S
ON=H
Switch=Open
OCsignal=L
HSsignal
=H
ON=H
Reset
t
TIMEOUT_5S
Switch=Open
OCsignal=L
ON=L
Switch=Open
OCsignal=H
Switch=Closed
Blanking=Waitfor
10mS
Currentislimited.
Thermalcircuitis
enabled.
AutoRestart=Waitfor
70mS
Switch=Closed
Waitfor0.125mS
Startt
TIMEOUT_5S
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Yes
No
HardShortdetectON
=0.125mS
No
OC – OverCurrent
HS – HardShort
A
B
C
-Commontoallthedetectionschemes
-CommontoOCandHSmodeonly
V =L
IN
Reset
V =H
ON=L (Default)
IN
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 4. Hard Short-Circuit Detection Flow Diagram
Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Link(s): TPS22946