Definition

Temperature coefficient is defined as the percentage change in output voltage per degree C, with all other operating conditions held constant.

Test Setup

The power supply must be put in an environmental chamber whose temperature can be precisely controlled over the specified temperature range. Using the test setup of Section II, set all operating conditions to specified values. Starting at the lowest temperature, hold the temperature constant until a stable output voltage is obtained. Continue this procedure until the highest temperature is reached. The slope of the curve of voltage versus temperature is the temperature coefficient, expressed in volts per degree C. To change to % / degree C, divide by the nominal output voltage and multiply by 100.

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