NCP349 ON Semiconductor, NCP349 Datasheet - Page 9

• Manufacturer Part Number: NCP349
• Description: Positive Overvoltage Protection Controller With Internal Low Ron Nmos Fet
• Manufacturer: ON Semiconductor

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
http://onsemi.com
in
> UVLO
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 = t
T = t
in
on
on
in
EN = 0
EN = 0
< OVLO
FLAG = High
T < t
Check V
V
out
on
= V
UVLO < V
in
in
V
out
= V
in
in
< OVLO
T < t
on