NUS2045MN ON Semiconductor, NUS2045MN Datasheet - Page 2

• Manufacturer Part Number: NUS2045MN
• 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
is 6.85 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 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 power MOSFET
Source pin of the power MOSFET
Gate pin of the 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 _sec provided that gate and stray capacitance is less than 12 nF.
Positive Voltage supply. If V
disconnecting the P−channel FET.
TH
CNTRL
), the OUT pin will be driven to within 1.0 V of V
IN
H
H
L
L
GND
V
+
−
NUS2045MN, NUS3045MN
ref
Figure 1. Simplified Schematic
CC
GND
OUT
V
V
V
Undervoltage
CC
CC
CC
falls below 2.8 V (nom), the OUT pin will be driven to within 1.0 V of V
Lock Out
Logic
http://onsemi.com
CNTRL
V
Microprocessor Port
CC
Driver
FET
2
Pin Description
CC
, thus disconnecting the FET. The nominal threshold level
P−CH
CC
which disconnects the FET. If this pin is not used,
NUSx045
GATE
OUT
Schottky
Diode
+
C1
CC
CC
LOAD
, thus
in less
CC
.