ncv33161 ON Semiconductor, ncv33161 Datasheet - Page 8

• Manufacturer Part Number: ncv33161
• Description: Universal Voltage Monitors
• Manufacturer: ON Semiconductor

The above figure shows the MC34161 configured as a dual positive overvoltage detector. As the input voltage increases from ground, the LED will turn `ON' when
V
the peak towards ground, the LED will turn `ON' when V
For known resistor values, the voltage trip points are:
The above figure shows the MC34161 configured as a dual positive undervoltage detector. As the input voltage decreases towards ground, the LED will turn `ON'
when V
from ground, the LED will turn `ON' when V
For known resistor values, the voltage trip points are:
Input V
Output
Voltage
Pins 5, 6
Input V
Output
Voltage
Pins 5, 6
S1
V
V
or V
1
1
+ (V
+ (V
S1
S
S
S2
or V
GND
GND
exceeds V
GND
GND
th
V
th
V
CC
V
V
CC
V
V
* V
* V
S2
2
1
2
1
falls below V
H
H
)
)
2
R
R
R
R
. With the dashed line output connection, the circuit becomes a dual positive undervoltage detector. As the input voltage decreases from
2
1
2
1
) 1
) 1
1
. With the dashed line output connection, the circuit becomes a dual positive overvoltage detector. As the input voltage increases
V
V
2
2
+ V
S1
+ V
V
V
Hys
or V
Figure 17. Dual Positive Undervoltage Detector
Hys
Figure 16. Dual Positive Overvoltage Detector
th
LED `ON'
th
LED `ON'
S2
R
R
R
R
MC34161, MC33161, NCV33161
2
1
2
1
exceeds V
) 1
) 1
S1
or V
S2
2
.
falls below V
http://onsemi.com
1
8
.
For a specific trip voltage, the required resistor ratio is:
For a specific trip voltage, the required resistor ratio is:
R
R
R
R
2
1
2
1
+
+
V
V
S2
S2
V
V
R
th
R
R
th
R
V
2
V
2
1
1
V
V
* V
* V
S1
S1
1
1
R
R
R
R
H
H
1
2
1
2
* 1
* 1
1
7
2
3
1
7
2
3
+
+
+
+
1.27V
1.27V
1.27V
1.27V
+
-
+
-
+
-
+
-
R
R
R
R
2
1
Reference
Reference
2
1
+
+
+
+
4
+
4
+
2.54V
2.54V
0.6V
2.8V
V
0.6V
V
2.8V
V
-
+
-
+
V
-
+
-
+
th
2
th
8
2
V
8
V
CC
* 1
CC
* 1
6
5
6
5