Multistage-power-amplification-balanced-modulation-circuit-base mixing protection type switching voltage-stabilized power supply

Abstract

The invention discloses a switching voltage-stabilized power supply based on a multi-stage power amplification balanced modulation circuit. The switching voltage-stabilized power supply is mainly composed of a diode rectifier U, a power amplifier P1, a voltage comparator U2, a transformer T, a balanced adjustment circuit, a switching filter circuit and the like, wherein the balanced adjustment circuit is connected between the diode rectifier U and the voltage comparator U2 in series, the switching filter circuit is connected between the balanced adjustment circuit and the power amplifier P1 in series. The switching voltage-stabilized power supply is characterized in that a logic protection amplifying circuit is further connected between the Q end of the voltage comparator U2 and the negative electrode input end of the power amplifier P1 in series. According to the switching voltage-stabilized power supply based on the multi-stage power amplification balanced modulation circuit, the switching control circuit is composed of field-effect transistors, so that the switching voltage-stabilized power supply has a boosting mode and a voltage reducing mode, a full-voltage-range output current is controlled to be within + / - 0.1%, and compared with a traditional switching voltage-stabilized power supply, the output current change control precision is greatly improved.

Description

Technical field [0001] The invention relates to a switch regulated power supply, in particular to a hybrid protection switch regulated power supply based on a multi-stage power amplification balanced modulation circuit. Background technique [0002] With the continuous advancement of current technology, electronic products are becoming more and more powerful while also bringing great convenience to people's lives. The voltage stabilizing circuit is born out of operation. The traditional series linear adjusting voltage stabilizing circuit has the characteristics of high stability, adjustable output voltage, small ripple coefficient and simple circuit. However, the regulator tubes of these series linear regulator circuits always work in amplifying state, and current flows all the time, so the power consumption of the tubes is relatively large, and the efficiency of the circuit is not high, generally only 30% to 50%. %about. In order to overcome the above-mentioned shortcomings, p...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of large ripple coefficient, serious radio frequency interference, complex circuit and low efficiency existing in the current switch-type regulated power supply, and provide a hybrid protection switching regulated power supply based on a multi-stage power amplifier balanced modulation circuit

Images