ncv33161 ON Semiconductor, ncv33161 Datasheet - Page 9

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

The above figure shows the MC34161 configured as a dual negative 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 negative 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
1
1
or -V
+
+
S
S
S1
R
R
R
R
GND
GND
S2
GND
GND
or -V
1
2
1
2
V
V
(V
(V
V
CC
V
V
V
CC
exceeds V
2
1
2
1
th
th
S2
* V
* V
falls below V
ref
ref
2
) ) V
) ) V
. With the dashed line output connection, the circuit becomes a dual negative undervoltage detector. As the input voltage decreases from
th
th
1
. With the dashed line output connection, the circuit becomes a dual negative overvoltage detector. As the input voltage increases
V
V
2
2
+
+
R
R
R
R
1
2
S1
V
1
2
V
(V
Figure 19. Dual Negative Undervoltage Detector
Hys
(V
Hys
Figure 18. Dual Negative Overvoltage Detector
or -V
LED `ON'
th
th
LED `ON'
* V
* V
MC34161, MC33161, NCV33161
S2
H
H
exceeds V
* V
S1
* V
or -V
ref
ref
) ) V
) ) V
S2
2
http://onsemi.com
.
falls below V
th
th
* V
* V
H
H
9
1
.
-V
For a specific trip voltage, the required resistor ratio is:
-V
S2
S2
R
R
-V
-V
1
2
S1
+
S1
V
R1
R1
R1
For a specific trip voltage, the required resistor ratio is:
V
R1
R
th
R
R
R
1
R
R
2
2
2
2
* V
* V
1
2
+
th
ref
V
V
th
1
1
7
2
3
1
7
2
3
* V
* V
+
+
+
+
ref
th
1.27V
1.27V
1.27V
1.27V
+
-
+
-
+
-
+
-
R
R
1
2
+
V
V
Reference
Reference
+
+
th
+
+
4
2
4
2.54V
2.54V
R
R
* V
* V
2.8V
0.6V
2.8V
0.6V
1
2
+
-
+
-
-
+
-
+
+
8
V
8
V
H
th
CC
CC
* V
V
) V
V
th
2
* V
* V
ref
H
th
H
* V
) V
ref
6
5
H
6
5