NUS3046MN ON Semiconductor, NUS3046MN Datasheet - Page 2

• Manufacturer Part Number: NUS3046MN
• Description: Overvoltage Protection Ic With Integrated Mosfet
• Manufacturer: ON Semiconductor

OVERVOLTAGE PROTECTION CIRCUIT TRUTH TABLE
PIN FUNCTION DESCRIPTIONS
Pin #
2, 10
4, 9
1
3
5
6
7
8
Accessory Charger
AC/DC Adapter of
<V
<V
>V
>V
IN
th
th
th
th
Symbol
CNTRL
DRAIN
GATE
GND
SRC
OUT
V
IN
CC
This pin senses an external voltage point. If the voltage on this input rises above the overvoltage threshold
(V
The nominal threshold level is 5.5 V and this threshold level can be increased with the addition of an external
resistor between IN and V
Circuit Ground
This logic signal is used to control the state of OUT and turn−on/off the P−channel power MOSFET. A logic High
results in the OUT signal being driven to within 1.0 V of V
the input should be connected to ground.
Drain pin of the P−channel power MOSFET
Source pin of the P−channel power MOSFET
Gate pin of the P−channel power MOSFET
This signal drives the gate of a P−channel MOSFET. It is controlled by the voltage level on IN or the logic state
of the CNTRL input. When an overvoltage event is detected, the OUT pin is driven to within 1.0 V of V
than 1.0 msec provided that gate and stray capacitance is less than 12 nF.
Positive Voltage supply. P−channel power MOSFET is guaranteed to be in ON state as long as V
above 2.5 V and below the overvoltage threshold.
TH
CNTRL
), the OUT pin will be driven to within 1.0 V of V
IN
H
H
L
L
GND
V
+
−
ref
Figure 1. Simplified Schematic
CC
GND
OUT
V
V
V
.
CC
CC
CC
Logic
http://onsemi.com
V
CNTRL
Microprocessor Port
CC
Driver
FET
2
Pin Description
CC
SRC
, thus disconnecting the P−channel power MOSFET.
P−CH
CC
which disconnects the FET. If this pin is not used,
NUS3046
DRAIN
GATE
OUT
Schottky
Diode
+
C1
CC
remains
CC
LOAD
in less