Self-oscillation circuit

Abstract

The invention relates to a self-oscillation circuit. The self-oscillation circuit comprises a first polar capacitor, a second polar capacitor, a first capacitor, a second capacitor, a third capacitor,a fourth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a voltage-stabilizing diode, a voltage stabilizer, a first transistor, a second transistor, an MOS transistor, and a dual-winding transformer. According to the circuit, multiple-group stable power supply can be realized, and the power supply power is not limited; the self-oscillation circuit has the advantages of low temperature rise and high efficiency, and the power supply can work more stably; the cost is lowered, so that the cost performance of the power supply can be improved; meanwhile, the self-oscillation circuit works in adisconnection mode, so that the switching tube and the transformer are low in loss; and by virtue of matching of the conventional resistance capacitors and the transistors, the cost of an integratedcircuit (IC) is saved.

Description

technical field [0001] The invention relates to a self-excited oscillating circuit, in particular to a self-excited oscillating circuit capable of realizing simultaneous auxiliary power supply for multiple groups. Background technique [0002] The auxiliary power supply used by existing power supply products is realized by using a step-down power supply IC. Working principle: According to the circuit power supply IC, the input voltage is stabilized at the set voltage value through the step-down of the BUCK circuit. Most of the current auxiliary power supply ICs are suitable for BUCK circuits, that is, they can only output a stable voltage, and cannot supply power to multiple groups. At the same time, the cost of using integrated IC will increase. Contents of the invention [0003] In view of this, it is necessary to provide a self-excited oscillation circuit for the problem. [0004] A self-excited oscillation circuit, comprising: a first polarity capacitor, a second po...

AI Technical Summary

Problems solved by technology

Most of the current auxiliary power supply ICs are suitable for BUCK circuits, that is, they can only output a stable voltage, and cannot supply power to multiple groups.

At the same time, the cost of using integrated IC will increase

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