Double-filtering non-linear negative feedback-type logic protection emitter coupling stabilized switching power supply

Abstract

The invention discloses a nonlinear negative feedback logic protection emitter coupling type switch voltage stabilizing power source which is mainly composed of a diode rectifier U, a power amplifier P1, a transformer T, a voltage comparator U1, a switch filter circuit connected between the positive electrode output end of the diode rectifier U and the in-phase end of the power amplifier P1 in series, a power source output circuit connected with a secondary side coil L2 of the transformer T, a voltage transformation feedback circuit connected with a secondary side coil L3 of the transformer T and the like. The nonlinear negative feedback logic protection emitter coupling type switch voltage stabilizing power source is characterized in that a logic protection emitter coupling type amplification circuit is further connected between the Q end of the voltage comparator U1 and the inversion-phase end of the power amplifier P1 in series. According to the nonlinear negative feedback logic protection emitter coupling type switch voltage stabilizing power source, a current detection amplifier circuit is used for achieving current detection, the current borne by a switch power source can be effectively increased, and the application range of the switch power source becomes wider.

Description

technical field [0001] The invention relates to a switch stabilized voltage power supply, in particular to a double filter nonlinear negative feedback logic protection emitter coupled switch stabilized voltage power supply. Background technique [0002] With the continuous advancement of science and technology, electronic products have brought great convenience to people's life while their functions are becoming more and more powerful. The voltage stabilizing circuit is easy to operate. The traditional series linear regulating voltage stabilizing circuit has the characteristics of high stability, adjustable output voltage, small ripple coefficient, and simple circuit. However, the adjustment tubes of these series linear adjustment type voltage regulator circuits always work in the amplified 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 reaching 30% to 50%. %abou...

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 double-filter nonlinear negative feedback logic protection emitter-coupled switch regulated power supply

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