NCP348 ONSEMI [ON Semiconductor], NCP348 Datasheet - Page 9

• Manufacturer Part Number: NCP348
• Description: Positive Overvoltage Protection Controller with Internal Low R_ON NMOS FET and Status FLAG
• Manufacturer: ONSEMI [ON Semiconductor]

UVLO < V
V
out
= Open
in
< OVLO
FLAG = High
V
V
V
Check V
out
in
in
OVLO > V
< UVLO or
> OVLO
V
V
V
V
= 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
NCP348
FLAG = Low
FLAG = Low
Timer Check
FLAG = Low
Reset Timer
Timer Count
Reset Timer
Timer Check
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