(1) Voltage regulation rate SV
The voltage regulation rate is an important indicator to characterize the quality of the voltage regulation performance of the DC regulated power supply. It is also called the voltage regulation coefficient or the stability coefficient. It represents the degree of stability of the output voltage VO of the DC regulated power supply when the input voltage VI changes. Expressed as a percentage of the relative change in the input and output voltages at a unit of output voltage. The formula of voltage regulation rate is shown in Figure 2-2-1.
(2) Current regulation rate SI
The current regulation rate is a main self-index reflecting the load capacity of the DC regulated power supply, also known as the current stability coefficient. It characterizes the ability of the DC regulated 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 constant. The percentage of output voltage change value represents the current regulation rate of the DC regulated power supply. The formula of current regulation rate is shown in Figure 2-2-2.
(3) Ripple rejection ratio SR
The ripple rejection ratio reflects the ability of the DC regulated power supply to suppress the mains voltage introduced at the input terminal. When the input and output conditions of the DC regulated power supply remain unchanged, the ripple rejection ratio is usually determined by the peak-to-peak value of the input ripple voltage. The peak-to-peak ratio of the output ripple voltage is generally expressed in decibels, but sometimes it can also be expressed as a percentage, or directly expressed as a ratio of the two.
(4) Temperature stability K
The temperature stability of the integrated DC regulated power supply is the percentage value of the relative change of the output voltage of the DC regulated power supply within the specified maximum variation range of the operating temperature TI of the DC regulated power supply (Tmin≤TI≤Tmax). The temperature stability formula is shown in Figure 2-2-3.
