Switch control method for DC stabilized voltage power supply

Abstract

The invention discloses a DC regulated power supply switch control method. The DC regulated power supply switch control method comprises the following steps: a manual switch is set to be a constantly-opened key switch and used for manual switch control; a control signal input end is set and is used for inputting automatic switching control signals; a 555 timer is set; the TH and / TL pins of the 555 timer are connected with the manual switch; the / RES pin is connected with the control signal input end; the OUT pin is connected with a clock pin of a D trigger; the D trigger is set; the D pin is directly connected with the / Q pin; the Q pin and / or the / Q pin is connected with a power control unit for outputting the switch control signals; the power control unit is set for the switch control according to the switch control signals from the D trigger. The regulated power supply control method can not only be controlled through external signals, but also can be manually controlled by the constantly-opened key; the invention has the simple circuit, the good stability and the high reliability.

Description

technical field [0001] The invention relates to electronic circuit technology, in particular to a DC stabilized power switch control method. Background technique [0002] In electronic circuits such as communications and electronic instruments, in order to control the power-on and power-off states of the circuit, it is often necessary to switch on and off the DC regulated power supply that supplies power to it. Among them, the more commonly used control means are: automatic control of the switch state of the power supply through an external input control signal, manual control of the switch state of the power supply through a switch or a button, etc. These two control methods are suitable for different occasions, but with the improvement of system integration and the diversification of user needs, many systems often need to use both automatic and manual power control methods at the same time. [0003] In the case of using an external signal for automatic control, as long as...

AI Technical Summary

Problems solved by technology

However, it can only support switch button control mode and cannot support automatic control mode, and the buttons used are also traditional mechanical toggle switches, which do not support normally open buttons

[0008] The existing regulated power supply control device cannot support the manual control mode of the normally open button, and the manual control and automatic control cannot be operated at the same time

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