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NUS1204MN Datasheet(PDF) 2 Page - ON Semiconductor

Part No. NUS1204MN
Description  Overvoltage Protection IC with Integrated MOSFET
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NUS1204MN Datasheet(HTML) 2 Page - ON Semiconductor

   
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NUS1204MN
http://onsemi.com
2
Figure 1. Simplified Schematic
+
IN
SOURCE
GND
OUT
GATE
Schottky
Diode
LOAD
C1
P−CH
Vref
AC/DC Adapter of
Accessory Charger
+
DRAIN
PIN FUNCTION DESCRIPTIONS
Pin #
Symbol
Pin Description
1
GATE
Gate pin of the P−Channel Power MOSFET
2
OUT
This signal drives the gate of a P−channel Power MOSFET. It is controlled by the voltage level on the IN pin.
When an overvoltage event is detected, the OUT pin is driven to within 1.0 V of VIN in less than 20 msec
provided that gate and stray capacitance is less than 12 nF.
3, 7
GND
Circuit Ground
4
IN
This pin senses an external voltage point. If the voltage on this input rises above the overvoltage threshold
(VTH), the OUT pin will be driven to within 1.0 V of VIN, thus disconnecting the P−Channel Power MOSFET.
The nominal threshold level is 4.725 V and this threshold level can be increased with the addition of an external
resistor between the IN pin and the adapter.
5
SOURCE
Source pin of the P−Channel Power MOSFET
6, 8
DRAIN
Drain pin of the P−Channel Power MOSFET
OVERVOLTAGE PROTECTION CIRCUIT TRUTH TABLE
IN
OUT
<Vth
GND
>Vth
VIN


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