메인 콘텐츠로 건너뛰기

# How is the power consumption of an operational amplifier calculated?

Latest Updated:12/01/2011

## Question:

How is the power consumption of an operational amplifier calculated?

The power consumption is calculated from the circuit current of the operational amplifier itself and from the output load current.
Examples of when the output current flows out and flows in are shown below.

(1) Output current flowing out

(2) Output current flowing in

For example, the power consumption in the case of the above diagrams is as follows.

(1) Power consumption from circuit current of operational amplifier itself:
ICC×(V+-V-)=1(mA)×30(V)=30(mW)

(2) Power consumption from output load current:
IO×(V+-VO)=10(mA)×10(V)=100(mW)

(1)+(2)=130(mW)

Suitable Products
 Operational Amplifiers USB2.0 Host/Peripheral Controller UPD720150
• 이 기사가 도움이 되셨나요?