Time sequence control circuit and control method thereof

Abstract

The invention discloses a time sequence control circuit, which comprises a power supply, a trigger signal switch, a first electronic switching circuit, a second electronic switching circuit, a first control circuit, a second control circuit, a Resistor Capacitor (RC) power-on delay circuit and a power-off relay circuit, wherein the first electronic switching circuit is connected in series between the power supply and a first voltage output end; the second electronic switching circuit is connected in series between the power supply and a second voltage output end; the first control circuit is connected between the trigger signal switch and the first electronic switching circuit; the second control circuit is connected between the trigger signal switch and the second electronic switching circuit; the Resistor Capacitor (RC) power-on delay circuit is connected between the first voltage output end and an input end of the second control circuit; and the power-off relay circuit is connected between the second voltage output end and an input end of the first control circuit. The time sequence control circuit can simultaneously control power-on time sequences and power-off time sequences of different power supplies of an internal chip of equipment, increase the reliability of the running of the equipment and the chip, and extend the service life of the equipment and the chip; besides, the time sequence control circuit has the advantages of simple structure, low manufacturing cost, simple process and suitability for large-scale popularization.

Description

technical field [0001] The invention relates to the technical field of intelligent control of power supplies, in particular to a sequence control circuit and a control method thereof. Background technique [0002] With the rapid development of electronic technology, DSP (digital signal processor), CPU (central processing unit), large-scale integrated circuits, etc. are widely used in communication, automatic control, aerospace, medical, household appliances and other fields. With the development of chips, the power supply structure is also diversified based on considerations of reliability, stability, and cost; under this development trend, the electronic chips used in equipment are also diverse. The requirements are becoming more and more complex. For equipment powered by multiple power supplies, different chips in the equipment or different modules of the same chip have strict requirements on the power-on sequence of multiple power supplies, and some even have certain requ...

AI Technical Summary

Problems solved by technology

With the development of chips, the power supply structure is also diversified based on considerations of reliability, stability, and cost; under this development trend, the electronic chips used in equipment are also diverse. The requirements are becoming more and more complex. For equipment powered by multiple power supplies, different chips in the equipment or different modules of the same chip have strict requirements on the power-on sequence of multiple power supplies, and some even have certain requirements on the power-off sequence. If the power-on or power-off sequence is improper, it will not only affect the reliability of the chip and equipment, but may even cause permanent damage to the chip

[0003] At present, most of the commonly used timing control circuits are implemented by a special timing control chip. Although the timing control chip can control the timing of power-on and power-off, the chip has high manufacturing costs and complicated processes, and is not suitable for large areas. Promotion

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