VCCSA voltage output control circuit

Abstract

A VCCSA voltage output control circuit disclosed by the present invention comprises a power supply chip, and a chip start control circuit and an output power supply control circuit which are connected with the power supply chip, the output power supply control circuit comprises an NMOS tube QP1 and an NMOS tube QP2, the grid electrodes of the NMOS tube QP1 and the NMOS tube QP2 are connected with the power supply chip, the drain electrode of the NMOS tube QP1 is connected with an external power supply input end VIN, and the drain electrode of the NMOS tube QP2 is connected with an external power supply output end VIN. The source electrode of the NMOS tube QP1 is connected with the drain electrode of the NMOS tube QP2, the source electrode of the NMOS tube QP2 is grounded, and the source electrode of the NMOS tube QP1 is further connected with the LC filter circuit and the feedback output circuit. The circuit is safe, stable, high in working efficiency, capable of effectively improving product performance, high in circuit universality and wide in application, and can be directly applied to power supply module circuits such as a south bridge and a memory by adjusting corresponding output voltage.

Description

technical field [0001] The invention relates to the technical field of computer power supply circuits, in particular to a VCCSA voltage output control circuit. Background technique [0002] The computer motherboard is one of the most basic and important components of a computer, and is the core of the computer hardware system; the main function of the motherboard is to transmit various electronic signals, and some chips are also responsible for preliminary processing of some peripheral data; , storage devices, and other I / O devices must be controlled through the motherboard; whether the computer's performance can be fully utilized depends on the design of the motherboard. [0003] Among them, the design of the power supply module of the motherboard plays a very important role in the motherboard. The power supply module of the motherboard is the driving force of the motherboard. Most of the electronic components on the motherboard need power supply to maintain normal work, so...

AI Technical Summary

Problems solved by technology

[0005] (1) The number of circuit components is large, and the cost of using components is high;

[0006] (2) The circuit is complex and inconvenient for Debug maintenance;

[0007] (3) The input voltage range of the control chip is small, and the switching frequency is fixed and cannot be adjusted, so the versatility is poor;

[0008] (4) The work efficiency is low, the performance of the computer system cannot be fully utilized, and there is no market competitive advantage

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