MC33161DMR2 データシートの表示（PDF） - ON Semiconductor

部品番号

コンポーネント説明

メーカー

MC33161DMR2

Universal Voltage Monitors

ON Semiconductor 

MC34161, MC33161, NCV33161

V2

Input VS

V1

GND

Output VCC

Voltage

Pins 5, 6 GND

VHys

LED ‘ON’

VCC

8

2.54V

VS1

1

Reference

−

R2 7

++

+

2.8V

VS2

R1

2+ −

1.27V

−

6

R2

++

+

0.6V

3+ −

5

R1

1.27V

4

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

VS1 or VS2 exceeds V2. With the dashed line output connection, the circuit becomes a dual positive undervoltage detector. As the input voltage decreases from

the peak towards ground, the LED will turn ‘ON’ when VS1 or VS2 falls below V1.

For known resistor values, the voltage trip points are:

ǒ Ǔ V1 + (Vth * VH)

R2

R1

)

1

ǒ Ǔ V2 + Vth

R2

R1

)

1

For a specific trip voltage, the required resistor ratio is:

R2

R1

+

Vth

V1

*

VH

*

1

R2

R1

+

V2

Vth

*

1

Figure 16. Dual Positive Overvoltage Detector

V2

Input VS

V1

GND

Output VCC

Voltage

Pins 5, 6 GND

VHys

LED ‘ON’

VCC

8

2.54V

VS1

1

Reference

−

7

R2

+

VS2

2+ −

++

2.8V

6

R1

1.27V

−

R2

++

+

0.6V

3+ −

5

R1

1.27V

4

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 VS1 or VS2 falls below V1. With the dashed line output connection, the circuit becomes a dual positive overvoltage detector. As the input voltage increases

from ground, the LED will turn ‘ON’ when VS1 or VS2 exceeds V2.

For known resistor values, the voltage trip points are:

ǒ Ǔ V1 + (Vth * VH)

R2

R1

)

1

ǒ Ǔ V2 + Vth

R2

R1

)

1

For a specific trip voltage, the required resistor ratio is:

R2

R1

+

Vth

V1

*

VH

*

1

R2

R1

+

V2

Vth

*

1

Figure 17. Dual Positive Undervoltage Detector

http://onsemi.com

8

Share Link: