NCP347 ON Semiconductor, NCP347 Datasheet - Page 9

• Manufacturer Part Number: NCP347
• Description: Positive Overvoltage Protection Controller
• Manufacturer: ON Semiconductor

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UVLO < V
V
out
= Open
in
< OVLO
FLAG = High
V
V
V
Check V
out
in
in
OVLO > V
V
V
V
V
< UVLO or
> OVLO
= Open
in
in
in
in
EN = 1
< UVLO or
> OVLO
< UVLO or
> OVLO
in
Figure 18. State Machine
EN = 1
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in
> UVLO
NCP347
FLAG = Low
Reset Timer
FLAG = Low
Timer Check
Reset Timer
FLAG = Low
Timer Check
Timer Count
Timer Count
V
Check EN
Check EN
Check V
V
in
V
9
V
out
in
out
< UVLO or
> OVLO
= 0
= 0
UVLO < V
T = 50 ms
in
T = 50 ms
in
EN = 0
EN = 0
< OVLO
T < 50 ms
FLAG = High
Check V
V
out
= V
UVLO < V
in
in
V
out
= V
T < 50 ms
in
in
< OVLO