CN2869977Y

CN2869977Y - Stand-by control circuit of computer ATX electric power supply

Info

Publication number: CN2869977Y
Application number: CN 200520126739
Authority: CN
Inventors: 邓小龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-31
Filing date: 2005-12-31
Publication date: 2007-02-14
Anticipated expiration: 2015-12-31

Abstract

A standby control circuit for ATX power supply of computer, which comprises the primary winding of transformer is connected with the power grid, two secondary windings connected respectively with the input terminals of the circuit formed of the master board+5VSB power supply and the circuit formed of the PWM control and the power supply for the protective circuit. The output terminal of the circuit formed of the master board+5VSB power supply is connected with the master board+5VSB terminal and the circuit formed of the PWM control and the power supply for the protective circuit connected with the input terminal of the PWM control and the power supply for the protective circuit via the 1st controlled switch. The 2nd controlled switch is connected between the ATX power plug and the input terminal of the EMI filter, and the output terminal of the EMI filter connected with ATX transfer circuit. The input terminals of the control signals of the 1st controlled switch and 2nd controlled switch are connected with the PS-OB terminal of the master board. When the computer is turned off, the standby control circuit automatically disconnects the AC input circuit of the ATX regulated power supply and the power supply for the PWM control and the protective circuit, thus greatly extending the service life of the ATX power supply, reducing the fault rate and greatly saving power energy.

Description

The readiness control circuit of computer ATX electric power

Technical field

The utility model relates to computer ATX electric power, specifically is meant the readiness control circuit of computer ATX electric power.

Background technology

Existing personal computer and mininet server adopt the ATX power supply that the 220V alternating current of electrical network is converted to the required various low-voltage DCs of computer-internal usually.The circuit structure of ATX power supply generally includes the ATX main transformer and changes circuit and PWM control and holding circuit; when computer shutdown; as long as ATX is connected in the electrical network; the partial circuit that the ATX main transformer changes circuit, PWM control and holding circuit and computer motherboard just is ready; and do not quit work, just the PWM driving pulse is blocked.When under off-mode, pressing the host power supply button, the PS-ON end output 0V RUN signal of mainboard is to PWM control and holding circuit, remove the PWM driving pulse and block, it is in running order to make the ATX main transformer change circuit, the required various low-voltage DCs of output computer operation; When shutting down by force with power knob under open state or shutting down with software mode, the PS-ON end output 5V STOP signal of mainboard is to PWM control and holding circuit, and pwm pulse blocks, and makes the ATX main transformer change circuit and is ready.

This shows, as long as be connected in the electrical network, do not close socket, the ATX power supply just never quits work, and most of people seldom extracts electric power connection line after shutting down computer from socket, like this, just make the ATX power supply be in the energising armed state for a long time, so not only waste a large amount of electric energy, also greatly shortened the life-span of ATX power supply, improved failure rate.

The utility model content

The utility model provides a kind of readiness control circuit of computer ATX electric power, and its fundamental purpose is to overcome existing ATX power supply and still is in the energising duty under holding state, the shortcoming that causes waste electric energy, the life-span that has shortened the ATX power supply, failure rate to improve.

The utility model adopts following technical scheme: the readiness control circuit of computer ATX electric power, it is characterized in that: comprise that transformer, mainboard+5VSB power supply form circuit, PWM control is changed circuit, PWM control and holding circuit and first controlled switch and second controlled switch with holding circuit power supply formation circuit, electromagnetic interface filter, ATX main transformer, the elementary winding of transformer gets access to grid, and two secondary winding connect mainboard+5VSB power supply respectively and form the input end that circuit, PWM control and holding circuit power supply form circuit; Output termination mainboard+5VSB that mainboard+5VSB power supply forms circuit holds, and PWM control forms circuit is connected to PWM control and holding circuit through first controlled switch power input with the holding circuit power supply; Second controlled switch is connected between ATX attaching plug and the electromagnetic interface filter input end, electromagnetic interface filter output termination ATX translation circuit; The signal input end of first controlled switch, second controlled switch is connected to the PS-ON end of mainboard.

Mainboard+5VSB power supply forms circuit formations+5VSB power supply, for mainboard+the 5VSB end provides standby power, this partial circuit is not as long as the ATX power supply is connected just in running order with the electrical network cut-out.When computing machine is in off-mode, press the host power supply button, mainboard PS-ON end sends the signal input end of OVRUN signal to the first controlled switch, second controlled switch, make its conducting, make the ATX main transformer change circuit and PWM control and holding circuit energized, PWM control is started working with holding circuit, removes the PWM driving pulse blockade that the ATX main transformer changes circuit, and the ATX main transformer changes the circuit operate as normal; When computing machine is under the open state; by software shutdown or when pressing host power supply button forced shutdown; mainboard PS-ON end sends the signal input end of 5VSTOP signal to the first controlled switch, second controlled switch; make its shutoff; make the ATX main transformer change circuit and PWM control and holding circuit and disconnect and being connected of power supply, PWM controls and holding circuit quits work.As seen, this ATX power supply is when off-mode, and the ATX main transformer changes circuit and all is connected with the power supply disconnection with holding circuit with PWM control.

The readiness control circuit of aforementioned computer ATX electric power, its mainboard+5VSB power supply forms circuit and is made up of bridge rectifier circuit, filter capacitor and mu balanced circuit, a secondary winding of the input termination transformer of bridge rectifier circuit, the output termination mainboard of mu balanced circuit+5VSB end.

The readiness control circuit of aforementioned computer ATX electric power, its PWM control form circuit with the holding circuit power supply to be made up of bridge rectifier circuit, filter capacitor, and first controlled switch is an electronic switch that is formed by two triodes.

The readiness control circuit of aforementioned computer ATX electric power, its second controlled switch is made up of two triodes and a relay, and two triodes are formed an electronic switch, the break-make of pilot relay.

The readiness control circuit of aforementioned computer ATX electric power, its second controlled switch also can be made up of a triode and a solid-state relay, and the b utmost point of this triode connects the PS-ON end of mainboard, and the c utmost point connects the signal input end of solid-state relay, e utmost point ground connection.

By above-mentioned description to the utility model structure as can be known; compare with prior art; the utlity model has following advantage: when computer shutdown; the main transformer that this readiness control circuit can automatically shut down the ATX power supply changes circuit and PWM control and holding circuit; make it be in off-position, be in the energising armed state and only stay mainboard+5VSB power supply to form circuit, thereby greatly prolonged the serviceable life of ATX power supply; reduce its failure rate, also saves energy greatly.

Description of drawings

Fig. 1 is a schematic block circuit diagram of the present utility model;

Fig. 2 is the circuit diagram of the utility model embodiment one;

Fig. 3 is the circuit diagram of the utility model embodiment 2 second controlled switchs;

Fig. 4 is existing ATX power supply control integrated package.

Specific embodiment

Specific embodiment of the utility model one is used for the readiness control circuit of computer ATX electric power, is arranged in the ATX power supply.With reference to Fig. 1, this circuit comprises that mainly transformer 1, mainboard+5VSB power supply form circuit 2, PWM control is changed circuit 4, PWM control and holding circuit 6 and first controlled switch 7 and second controlled switch 8 with holding circuit power supply formation circuit 3, electromagnetic interface filter 5, ATX main transformer, the elementary winding of transformer 1 gets access to grid, and two secondary winding connect mainboard+5VSB power supply respectively and form the input end that circuit 2, PWM control and holding circuit power supply form circuit 3; Output termination mainboard+5VSB that mainboard+5VSB power supply forms circuit 2 holds, and PWM control forms circuit 3 is connected to PWM control and holding circuit 6 through first controlled switch 7 power input with the holding circuit power supply; Second controlled switch 8 is connected between ATX attaching plug and electromagnetic interface filter 5 input ends, electromagnetic interface filter 5 output termination ATX translation circuits 4; The signal input end of first controlled switch 7, second controlled switch 8 is connected to the PS-ON end of mainboard.

With reference to Fig. 2, the mu balanced circuit that bridge rectifier circuit D1, filter capacitor C1 that mainboard+5VSB power supply formation circuit 2 is made up of four diodes and integrated package of pressure-stabilizing LM317T form is formed, a secondary winding of the input termination transformer 1 of bridge rectifier circuit D1, the output termination mainboard of mu balanced circuit+5VSB end.PWM control and holding circuit power supply form bridge rectifier circuit D2, the filter capacitor C4 that circuit 3 is made up of four diodes to be formed, and first controlled switch 7 is an electronic switch that is formed by two triode Q1, Q2.Second controlled switch 8 is made up of two triode Q3, Q4 and a relay, and two triode Q3, Q4 form an electronic switch, the break-make of pilot relay, and the contact K1 of this relay is connected between ATX attaching plug and the electromagnetic interface filter 5.

Mainboard+5VSB power supply forms circuit 2 formations+5VSB power supplys, for mainboard+the 5VSB end provides standby power, this partial circuit is not as long as the ATX power supply is connected just in running order with the electrical network cut-out.When computing machine is in off-mode, press the host power supply button, mainboard PS-ON end sends the signal input end of OVRUN signal to the first controlled switch 7, second controlled switch 8, make its conducting, make the ATX main transformer change circuit 4 and PWM control and holding circuit 6 energized, PWM control is started working with holding circuit 6, and release ATX main transformer changes the PWM driving pulse of circuit 4, and the ATX main transformer changes circuit 4 operate as normal; When computing machine is in open state; by software shutdown or when pressing host power supply button forced shutdown; mainboard PS-ON end sends the signal input end of 5VSTOP signal to the first controlled switch 7, second controlled switch 8; make its shutoff; make the ATX main transformer change circuit 4 and PWM control and holding circuit 6 and disconnect and being connected of power supply, PWM controls and holding circuit 6 quits work.As seen, this ATX power supply is when off-mode, and the ATX main transformer changes circuit 4 and all is connected with the power supply disconnection with holding circuit 6 with PWM control.

When the certainly complete off-position of main frame was started shooting, the PS-ON terminal was sent the OVRUN signal from mainboard, and triode Q4 ends, triode Q3 saturation conduction, and K1 connects, and electrical network is powered to ATX by K1; Triode Q2 ends simultaneously, the unstable direct current of the about 14V of triode Q1 output is supplied with PWM controller IC and pwm pulse driving transformer, the ATX stabilized voltage supply enters duty, when each output DC source, road enters steady state (SS), D5 enters breakdown conditions, triode Q2 conducting, and triode Q1 ends, change into ATX voltage stabilizer output+the 12V power supply, to reduce the power consumption and the volume of standby Industrial Frequency Transformer.Fig. 4 is the circuit diagram of PWM controller IC for existing ATX power supply control integrated package; When computer operating system software shutdown or forced shutdown, the PS-ON terminal output+5V STOP signal of mainboard, triode Q4 conducting, triode Q3 ends, and K1 disconnects, and cuts off the current supply circuit of electrical network; Triode Q2 continues conducting, and triode Q1 continues to end, and makes PWM control and holding circuit 6 outages.

Specific embodiment of the utility model two, with reference to Fig. 3, be with the difference of embodiment one: its second controlled switch 8 is made up of a triode Q3 and a solid-state relay, and the b utmost point of this triode Q3 connects the PS-ON end of mainboard, the c utmost point connects the signal input end of solid-state relay, e utmost point ground connection.

Above-mentioned only is two specific embodiments of the present utility model, but design concept of the present utility model is not limited thereto, and allly utilizes this design that the utility model is carried out the change of unsubstantiality, all should belong to the behavior of invading the utility model protection domain.

Claims

1, the readiness control circuit of computer ATX electric power, it is characterized in that: comprise that transformer, mainboard+5VSB power supply form circuit, PWM control is changed circuit, PWM control and holding circuit and first controlled switch and second controlled switch with holding circuit power supply formation circuit, electromagnetic interface filter, ATX main transformer, the elementary winding of transformer gets access to grid, and two secondary winding connect mainboard+5VSB power supply respectively and form the input end that circuit, PWM control and holding circuit power supply form circuit; Output termination mainboard+5VSB that mainboard+5VSB power supply forms circuit holds, and PWM control forms circuit is connected to PWM control and holding circuit through first controlled switch power input with the holding circuit power supply; Second controlled switch is connected between ATX attaching plug and the electromagnetic interface filter input end, electromagnetic interface filter output termination ATX translation circuit; The signal input end of first controlled switch, second controlled switch is connected to the PS-ON end of mainboard.

2, the readiness control circuit of computer ATX electric power as claimed in claim 1, it is characterized in that: described mainboard+5VSB power supply forms circuit and is made up of bridge rectifier circuit, filter capacitor and mu balanced circuit, a secondary winding of the input termination transformer of bridge rectifier circuit, the output termination mainboard of mu balanced circuit+5VSB end.

3, the readiness control circuit of computer ATX electric power as claimed in claim 1; it is characterized in that: described PWM control forms circuit with the holding circuit power supply to be made up of bridge rectifier circuit, filter capacitor, and first controlled switch is an electronic switch that is formed by two triodes.

4, the readiness control circuit of computer ATX electric power as claimed in claim 1 is characterized in that: described second controlled switch is made up of two triodes and a relay, and two triodes are formed an electronic switch, the break-make of pilot relay.

5, the readiness control circuit of computer ATX electric power as claimed in claim 1, it is characterized in that: described second controlled switch is made up of a triode and a solid-state relay, the b utmost point of this triode connects the PS-ON end of mainboard, and the c utmost point connects the signal input end of solid-state relay, e utmost point ground connection.