Dc-dc is a DC power converter, generally there are three types, namely buck type, boost type, lift type.
No matter what type of DC-DC, there is a conversion loss, which directly reflects the power consumption. Small conversion loss indicates low power consumption and high conversion efficiency, and vice versa.
The power consumption of DC-DC is not constant, it changes with the input signal and load changes. Generally speaking, the greater the difference between the input voltage and the output voltage and the greater the output current, the greater the power consumption. At the same time, the power consumption is also closely related to the circuit design idea and the selected components and processes.
From this point of view, the theoretical calculation of DC-DC power consumption is very complex, and most of this calculation is realized by using simulation software practice, and the results may only be real or close.
The most commonly used method is to measure the actual operation with the help of an instrument. Connect the voltmeter and ammeter respectively at the input and output terminals, measure the value, calculate the power, and then subtract the output power with the input power, the difference is the power consumption.
The power consumption of a dcdc power supply chip can be calculated using the following formula: Power consumption = input voltage x input current - Output voltage x output current.
Input voltage and input current refer to the input voltage and current of the chip, and output voltage and output current refer to the output voltage and current of the chip.
This formula can help us calculate the power consumption of the chip when it is working, so as to better evaluate the performance and use of the chip.
It should be noted that the calculation method of power consumption of different models of dcdc power supply chips may be different, and it needs to be adjusted according to the specific situation.