There are two types of technical indicators for power supplies such as sockets and switches: one is electrical technical parameters, including allowable input voltage, output voltage, output current, and output voltage adjustment range, etc.; the other is quality indicators, used to scale M output The degree of stability of the DC voltage, including the voltage stabilization coefficient, output resistance, temperature coefficient, and ripple voltage, etc. The meaning of these quality indicators is briefly described below.
- Quality indicators of sockets and switches supply
(1) Voltage regulation rate. Voltage regulation rate is an important indicator of the performance of switching power supply voltage regulation, also known as voltage regulation coefficient or stability coefficient: it characterizes the degree of stability of the output voltage R of the switching power supply when the input voltage changes, usually in the unit output voltage The relative change of input and output voltage is expressed as a percentage.
(2) Current regulation rate. The current regulation rate is the main indicator that reflects the load capacity of the switching power supply and is also called the current stability coefficient. It characterizes the ability of the switching power supply to suppress the fluctuation of the output voltage caused by the change of the load current when the input voltage is constant. Under the condition of the specified load current change, the current regulation rate of the switching power supply is usually expressed as the percentage of the output voltage change value under the unit output voltage.
(3) Ripple suppression ratio. The ripple rejection ratio reflects the ability of the switching power supply to suppress the main voltage introduced by the input terminal. When the input and output conditions of the switching power supply remain unchanged, the ripple rejection ratio of the switching power supply is usually expressed as the ratio of the peak-to-peak input ripple voltage to the peak-to-peak output ripple voltage and is generally expressed in decibels, but sometimes it can be Expressed as a percentage, or directly expressed by the ratio of the two.
(4) Temperature stability. The temperature stability of the integrated switching power supply is expressed by the percentage value of the relative change of the output voltage of the switching power supply within the maximum change range of the specified switching power supply operating temperature.
In addition, there are indicators that reflect the dynamic characteristics of the system, such as dynamic voltage drop and modulation time when a load is suddenly applied, as well as electromagnetic interference and radio frequency interference indicators for sockets and switches supply. Different application occasions have different requirements for the sockets and switches supply. Therefore, when designing a switching power supply, the technical index requirements for the power supply should be determined according to the specific situation, and then the converter structure of Herui should be selected and the design of relevant parameters should be completed.