D.C. voltage stabilizing power source switching control apparatus

A technology of DC stabilized power supply and switch control, which is applied in the direction of control/regulation system, adjustment of electric variables, instruments, etc. Automatic control mode and other issues, to achieve the effect of high reliability, easy device procurement, and convenient circuit debugging

Inactive Publication Date: 2008-06-04
STATE GRID TIANJIN ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 b...

Method used

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  • D.C. voltage stabilizing power source switching control apparatus
  • D.C. voltage stabilizing power source switching control apparatus

Examples

Experimental program
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Embodiment Construction

[0025] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0026] refer to figure 1 According to the present invention, the switch control device 10 for a DC stabilized power supply includes: a manual switch 20, which is a normally open key switch, used for manual switch control; a control signal input terminal 30, used for inputting an automatic switch control signal; a 555 timer 40, its TH and / TL pins are connected to the manual switch 20, its / RES pin is connected to the control signal input terminal 30, and its OUT pin is connected to the clock pin of the D flip-flop 50; D flip-flop 50, its D The pin is directly connected to the / Q pin, and its Q pin and / or its / Q pin are connected to the power control unit 60 for outputting the switch control signal; 50 switch control signal for switch control.

[0027] One end of the manual switch 20 is connected to VCC through a resistor, the other end is connected to the TH a...

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PUM

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Abstract

The invention discloses a DC stabilized voltage power supply switch control device, which comprises a hand switch which is a normally open type key switch for manual switch control; a control signal input terminal which is used for inputting automatic switch control signal; a 555 timer which has TH and /TL pins connected with the hand switch, a /RES pin connected with the control signal input terminal, and an OUT pin connected with a clock pin of a D trigger; the D trigger which has a D pin directly connected with a /Q pin, a Q pin and/or the /Q pin connected with a power supply control unit for outputting a switch control signal; and the power supply control unit which is used for carrying out switch control according to the switch control signal from the D trigger. The stabilized voltage power supply control device can be controlled through an external signal or manually through the normally open type key switch and has simple circuit, good stability and high reliability.

Description

technical field [0001] The invention relates to electronic circuit technology, in particular to a DC stabilized power switch control device. 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...

Claims

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Application Information

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IPC IPC(8): G05F1/46
Inventor 毕红军
Owner STATE GRID TIANJIN ELECTRIC POWER
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