Cosel is one of the world's leading power supply manufacturers offering
high-quality, ultra small size AC-DC power supplies,
DC-DC converters of the state-of-the-art technologies, and effective and
easy-to-use noise filters.

Frequently Asked Questions

Q. How to calculate calorific value?

The calorific value in power supply depends on power consumption as well as other electronic equipment. The calorific value is shown as following.

1 [Ws] = 1 [J]

It can be expressed in "cal" as follows as well.

1 [Ws] = 4.2 [cal]

For example, the power consumption of a power supply shown in the following spec can be calculated as follows.

[Spec]

Internal Power Loss: P	=	Active Power - Output Power
	=	(Output Voltage x Output Current / Efficiency) - (Output Voltage x Output Current)
	=	(5 x 10 / 0.8) - (5 x 10)
	=	12.5 [W]
Calorific Value: J	=	Internal Power Loss [W] x Time [s]
	=	12.5 x 3,600
	=	45,000 [J]
	=	45,000 / 4.2
	=	10,714 [cal]

Cosel is one of the world's leading power supply manufacturers offeringhigh-quality, ultra small size AC-DC power supplies,DC-DC converters of the state-of-the-art technologies, and effective andeasy-to-use noise filters.