General integration technology for realizing high efficiency of linear power supply

Abstract

The invention relates to a general integration technology for realizing high efficiency of a linear power supply. The invention is characterized in that a automatic power supply regulator tube output and input voltage tracking technology, a large closed-loop feedback control technology, a switch power supply full-range power regulation technology and an electronic component application technology are combined, and for adjustable-output-voltage or fixed-output-voltage linear power supplies which are formed by the following power devices: 1) a three terminal regulator; 2) a large power transistor; 3) an MOS-type field-effect tube; 4) a low-dropout linear integrated regulator or module; and 5) a common linear power supply module, no matter how large the output voltage and the output current of the two kinds of linear power supplies are or no matter how large the variation is, the efficiency of the linear power supplies can be promoted to the utmost extent by using a simplest general method to enable the efficiency of the linear power supplies to exceed the efficiency of low-voltage switch power supplies. Moreover, all general functional circuits for realizing the high-efficiency linear power supply are integrated on one chip which is a special chip for the high-efficiency linear power supply.

Description

Technical field [0001] For nearly a hundred years, linear power supplies have been identified as high-tech indicators and low efficiency, and the problem of low efficiency has never been substantially solved. This invention adopts the principle of automatic control of electronic circuits and universal technology to make all different output power, The linear power supply with adjustable and fixed output voltage and the efficiency can be improved to the maximum extent, and the technology belongs to the technical field of power supply electronics. Background technique [0002] Although the switching power supply is very efficient, its low technical index is determined by its working method, and it is difficult to get substantial improvement. Therefore, there are still a considerable number of electronic products that continue to use linear power supply for power supply. [0003] In the current adjustable linear DC stabilized power supply, the output voltage of the power regula...

AI Technical Summary

Problems solved by technology

[0008] 1) The output ripple is too large, and the high current output is at least 100mV P-P Above, even if a large cost measure is taken, it can only achieve tens of mV, which cannot meet the technical index requirements of precision DC stable power supplies in all walks of life;

[0009] 2) Since the power device works in the switching state, there are insurmountable radio frequency interference and electromagnetic interference;

[0010] 3) Energy storage inductors, energy storage capacitors, and freewheeling tubes are required, and the cost is relatively increased

[0011] 4) The energy storage inductor has copper loss and magnetic loss under high current, the energy storage capacitor has dielectric loss under high frequency, and the freewheeling tube has conduction voltage drop and switching loss. The actual efficiency is much lower than the ideal efficiency.

[0016] 3) The length of use time will affect the performance parameters of components

[0017] Based on the above random factors, this solution needs to leave a large voltage margin in the initial design of the product, so this method cannot maximize the efficiency of linear power supplies with fixed output voltages

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