Auxiliary power circuit for ATX (AT extended) power supply

Abstract

The invention discloses an auxiliary power circuit for an ATX (AT extended) power supply. The auxiliary power circuit for the ATX power supply comprises a power supply, 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 ninth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first diode, a second diode, a third diode, a fourth diode, a voltage stabilizing diode, a voltage stabilizing integrated circuit, a transformer and a triode, wherein the power supply inputs a 300V direct-current voltage to push a first primary coil of the transformer, the first diode and the second diode to be switched off; the fourth capacitor is charged along with rising of the charging voltage of the fifth capacitor; the voltage stabilizing diode and the fourth diode are switched on; and the first diode and the second diode output current which is used for awakening the working voltage, which is started in a controlled manner, of the ATX power supply of a host. The auxiliary power circuit for the ATX power supply has the advantages of simple structure and low energy consumption. A second primary coil of the transformer of the auxiliary power circuit is a feedback coil, and the stability of the output voltage is ensured.

Description

Technical field [0001] The present invention relates to an auxiliary circuit for a power supply, in particular to an auxiliary power circuit for ATX power supply. Background technique [0002] The ATX power supply is the working power supply of the computer, and the auxiliary power circuit is the key to maintaining the normal operation of the microcomputer and the ATX power supply. As long as the ATX switching power supply is connected to the mains, no matter whether the microcomputer is started or not, the other circuits can have standby leisure and controlled startup. The rotation of the control mode, and the auxiliary power circuit has been in the working state of high-frequency, high-voltage self-oscillation or controlled oscillation, making it the highest failure rate part of the ATX power supply. The ATX power supply using the traditional auxiliary power circuit has a structure The shortcomings of complexity and high energy consumption, and there is also the problem of unst...

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Problems solved by technology

[0002] ATX power supply is the working power supply of the computer. The auxiliary power supply circuit is the key to maintain the normal operation of the microcomputer and ATX power supply. As long as the ATX switching power supply is connected to the mains, no matter whether the microcomputer is started or not, other circuits can have two types: standby leisure and controlled startup. The rotation of the control mode, and the auxiliary power circuit is always in the working state of high-frequency, high-voltage self-excited oscillation or controlled oscillation, making it the part with the highest failure rate in the ATX power supply. The existing structure of the ATX power supply using the traditional auxiliary power supply circuit The shortcomings of complexity and high energy consumption, and there is also the problem of unstable voltage conversion output

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