NUS1204MN ON Semiconductor, NUS1204MN Datasheet - Page 2

• Manufacturer Part Number: NUS1204MN
• Description: Overvoltage Protection IC
• Manufacturer: ON Semiconductor

OVERVOLTAGE PROTECTION CIRCUIT TRUTH TABLE
PIN FUNCTION DESCRIPTIONS
Pin #
3, 7
6, 8
1
2
4
5
Accessory Charger
AC/DC Adapter of
SOURCE
Symbol
DRAIN
GATE
OUT
GND
<V
>V
IN
IN
th
th
Gate pin of the P−Channel Power MOSFET
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 V
provided that gate and stray capacitance is less than 12 nF.
Circuit Ground
This pin senses an external voltage point. If the voltage on this input rises above the overvoltage threshold
(V
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.
Source pin of the P−Channel Power MOSFET
Drain pin of the P−Channel Power MOSFET
TH
), the OUT pin will be driven to within 1.0 V of V
IN
GND
OUT
V
V
+
−
IN
ref
Figure 1. Simplified Schematic
GND
http://onsemi.com
NUS1204MN
2
SOURCE
Pin Description
IN
, thus disconnecting the P−Channel Power MOSFET.
P−CH
DRAIN
GATE
OUT
Schottky
Diode
IN
in less than 20 msec
+
C1
LOAD