NCP347 ON Semiconductor, NCP347 Datasheet - Page 8

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

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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 50 ms after the input
The NCP347 provides overvoltage protection for
IN
IN
VOLTAGE DETECTION
VOLTAGE DETECTION
DS(on)
Figure 16. Simplified Diagram
Figure 17. Simplified Diagram
NMOS FET
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NCP347
8
overtaking undervoltage UVLO (Figure 3). The NCP347
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.
OUT
OUT
UVLO < V
0 < V
CONDITIONS
V
CONDITIONS
IN
/EN = 1
And/Or
IN
/EN = 0
> OVLO
< UVLO
&
IN
< OVLO