NCP349 ON Semiconductor, NCP349 Datasheet - Page 8

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

Operation
positive voltage, up to 28 V. A low R
protects the systems (i.e.: charger) connected on the Vout
pin, against positive overvoltage. At powerup, with EN pin
= low, the output is rising up t
The NCP349 provides overvoltage protection for
IN
IN
on
soft−start after the input
VOLTAGE DETECTION
VOLTAGE DETECTION
DS(on)
Figure 16. Simplified Diagram
Figure 17. Simplified Diagram
NMOSFET
http://onsemi.com
8
overtaking undervoltage UVLO (Figure 3). The NCP349
provides a FLAG output, which alerts the system that a fault
has occurred. A t
output (Figure 3) is added between output signal rising up
and to FLAG signal rising up. FLAG pin is an open drain
output.
OUT
OUT
start
additional delay, regarding available
UVLO < V
0 < V
CONDITIONS
V
CONDITIONS
IN
/EN = 1
And/Or
IN
/EN = 0
> OVLO
< UVLO
&
IN
< OVLO