Switching power supply module is a major category of electronic power supply, which is divided into FH / DC module power supply and DC / DC module power supply. These two categories can be understood as a small and medium-sized power transformer is installed into a small indoor space, and the final sealing is used as the control module application, because it can only input and output pins, so it is convenient to use.
The key factors that limit the development trend of switching power supply module are component characteristics and technical standards.
1. Characteristics of output power semiconductor materials
The technology of output power semiconductor components was improved first. For example, the cold MOS transistor appeared in 1997, reducing one total level of on state resistor. It is a high frequency output power semiconductor material with wide operating frequency and fast switching frequency of power supply.
2. PFC converter
Because there are rectifier components and filter capacitors in the input end of ACDC conversion power supply circuit, when the sinusoidal working voltage is input, the output power of AC input end of two-phase electric rectifier power supply equipment is 0.7 ~ 0.65, for example, the output power of AC input end can be increased to 0.95 ~ 0.99 by using PFC converter.
3. Power
The practicality and high frequency of switching power supply is always the top priority of scientific research. In order to establish high power, it is necessary to improve the output power of PWM converter and reduce the volume net weight of energy storage technology components in power supply circuit. Using piezoelectric transformer can make high frequency output power converter build light, small, thin and high power. In order to reduce the volume and net weight, new capacitors can be selected.
4. Voltage regulator
Voltage regulator refers to the DC DC converter control module with low voltage and large power output, which promotes the switching power supply to the CPU. With the increase of data processing system speed and efficiency, the regulation of working voltage regulator is also improved, such as: low output working voltage, large output current, high conversion, no rapid response and so on.
5. Structure of switching power supply
The structure of switching power supply is divided into two levels and three levels. It is suitable for ultra-high speed integrated circuit chip and large and medium-sized digital switching syste
