Datasheet

OTD – Over Temperature Detect
OC – Over Current
HS – Hard Short
ON = H
ON =
Edge
Temp >
140°C
Temp <
130°C
ON = L
Switch = Open
OC signal = H
Switch = Closed
Switch = Closed
Wait for 7.5 ms
Yes
Yes
No
No
OTD ON = 0.5 ms
No
ON = H
Switch = Open
OC signal = L
Yes
Yes
No
ON = H
Yes
No
A
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
→
TPS22946
SLVS984A –SEPTEMBER 2009–REVISED FEBRUARY 2010 www.ti.com
Figure 3. Over-Temperature Detection Flow Diagram
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Product Folder Link(s): TPS22946