NCP348, NCP348AE
http://onsemi.com
8
VOLTAGE DETECTION
IN OUT
CONDITIONS
V
IN
> OVLO
0 < V
IN
< UVLO
And/Or
/EN = 1
VOLTAGE DETECTION
IN OUT
CONDITIONS
/EN = 0
&
UVLO < V
IN
< OVLO
Figure 16. Simplified Diagram
Figure 17. Simplified Diagram
Operation
The NCP348 provides overvoltage protection for
positive voltage, up to 28 V. A Low R
DS(on)
NMOS FET
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 50 ms after the input
overtaking undervoltage UVLO (Figure 3). The NCP348
provides a FLAG output, which alerts the system that a fault
has occurred. A 50 ms additional delay, regarding
available output (Figure 3) is added between output signal
rising up and to FLAG signal rising up. FLAG pin is an open
drain output.