What are the quality indicators of DC power supply?

With the development of electronic devices in the direction of high precision, high stability, and high reliability, DC stabilized power supplies place high demands on the power supply of electronic devices.

Quality Index

(1) Voltage regulation rate SV . The voltage regulation rate is an important indicator to characterize the regulation performance of a DC stabilized power supply. Also known as the regulation factor or the stability factor, it indicates the degree of stability of the output voltage VO of the DC stabilized power supply when the input voltage VI changes. Percentage of the relative change in the input and output voltages at the unit output voltage. Voltage regulation formula.

(2) Current regulation rate SI . The current regulation rate is a major self indicator that reflects the load capacity of a DC stabilized power supply, also known as the current stability factor. It characterizes the ability of the DC power supply to suppress the fluctuation of the output voltage caused by the change of the load current (output current) when the input voltage is not changed. Under the condition of the change of the specified load current, it is usually at the unit output voltage. The percentage of the output voltage change represents the current regulation rate of the DC power supply. Current regulation formula. .

(3) Ripple suppression ratio SR . The ripple rejection ratio reflects the ability of the DC power supply to suppress the mains voltage introduced at the input end. When the input and output DC power supply components of the DC power supply are kept unchanged, the ripple rejection ratio is usually based on the input ripple. The peak-to-peak ratio of the voltage peak-to-peak value and the output ripple voltage is usually expressed in decibels, but it can sometimes be expressed as a percentage or as a ratio between the two.

(4) Temperature stability K. The temperature stability of the integrated DC stabilized power supply is a percentage value of the relative change of the output voltage of the DC stabilized power supply within the specified maximum range of the operating temperature Ti of the DC stabilized power supply (Tmin≤Ti≤Tmax). Temperature stability formula.

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