CN203706130U - Power supply signal control circuit of computer power supply circuit - Google Patents
Power supply signal control circuit of computer power supply circuit Download PDFInfo
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- CN203706130U CN203706130U CN201420025409.4U CN201420025409U CN203706130U CN 203706130 U CN203706130 U CN 203706130U CN 201420025409 U CN201420025409 U CN 201420025409U CN 203706130 U CN203706130 U CN 203706130U
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Abstract
The utility model discloses a power supply signal control circuit of a computer power supply circuit. The power supply signal control circuit of the computer power supply circuit comprises a voltage division circuit, a parallel voltage stabilizing control circuit chip and an optical coupler, wherein the parallel voltage stabilizing control circuit chip and the optical coupler are connected with the voltage division circuit. The power supply signal control circuit is connected with a resistor R19 through the optical coupler and is then connected with a control chip U3 in a power management integrated circuit in the computer power supply circuit. The voltage division circuit is connected to the two ends of a charging capacitor C1 of an electrifying impact-resistant circuit in the computer power supply circuit in parallel and comprises an MOS tube Q7 used as a switch. The power supply signal control circuit has the energy-saving effect, can achieve the PG signal function and over-voltage and long-voltage protection and achieve the AC function startup and shutdown meanwhile, and also solves the problem that when a short circuit has the +12 V voltage, a computer is prone to blast.
Description
technical field:
The utility model relates to computer power circuit engineering field; refer in particular to a kind of power supply signal control circuit of computer power circuit; this power supply signal control circuit can be realized PG semiotic function and superpotential and voltage protection for a long time; realized AC functional switch machine, easy aircraft bombing problem while also having solved short circuit+12V voltage simultaneously.
background technology:
Computer power is that 220V/110V alternating current is converted to direct current, and powers as parts such as mainboard, driver, video cards for computer fittings specially, and it is the hinge of the each parts power supply of computer, is the important component part of computer.
Tradition computer power possesses a PG (POWER GOOD) signal conventionally to computer main board, has output over-voltage protection, for a long time voltage protection function simultaneously.Realize overvoltage protection and voltage protection for a long time and PG signal; current control circuit 100 is realized by chip U1 and peripheral circuit; often as shown in Figure 2; in the time of start; first voltage signal of 1 pin of chip U1 is provided; particularly; after the circuit rectifying and wave-filtering that this voltage signal is made up of the secondary winding in transformer T1 and resistance R 7, diode D7, capacitor C 7, resistance R 8, resistance R 9, dividing potential drop offers 1 pin of chip U1 again, realizes PG function and superpotential and voltage protection function for a long time for chip U1.
Now because computer power requires more and more higher and more next low to cost control to efficiency, traditional half-bridge line architecture and bi-crystal positive-arousing framework slowly can not meet designing requirement, advanced computer power all adopts half-bridge resonance (LLC) framework could realize the requirement that cost is low, efficiency is high now, but because half-bridge resonance (LLC) framework has been cancelled L1, L2 output choke inductance.If just there will be and there is no PF function with the circuit shown in Fig. 2 again, can not realize AC power on/off function simultaneously, in the time of output+12V voltage, be short-circuited and the phenomenon of easy aircraft bombing.
Because the above, the inventor proposes following technical scheme.
utility model content:
The purpose of this utility model is to overcome the deficiencies in the prior art; a kind of power supply signal control circuit of computer power circuit is provided; this power supply signal control circuit can be realized PG semiotic function and superpotential and voltage protection for a long time; realized AC functional switch machine, easy aircraft bombing problem while also having solved short circuit+12V voltage simultaneously.
In order to solve the problems of the technologies described above, the utility model has adopted following technical proposals: the power supply signal control circuit of this computer power circuit comprises: a bleeder circuit and the parallel voltage-stabilizing control circuit chip, the photo-coupler that are connected with bleeder circuit, and be connected with the control chip U3 of power management integrated circuit in computer power circuit by after this photo-coupler contact resistance R19, bleeder circuit is parallel to the charging capacitor C1 two ends of Electrified anti-impact circuit in computer power circuit, and bleeder circuit includes a metal-oxide-semiconductor Q7 as switch.
Furthermore, in technique scheme, described bleeder circuit also comprises: the first divider resistance R14, the second divider resistance R15, the 3rd divider resistance R16 that are connected in series successively, wherein, the drain electrode of metal-oxide-semiconductor Q7 and source electrode are connected between the second divider resistance R15 and the 3rd divider resistance R16, metal-oxide-semiconductor Q7 grid connects the rear connection power supply of a resistance R 13 VCC1, the 3rd divider resistance R16 ground connection.
Furthermore, in technique scheme, described first divider resistance R14 one end is also connected with resistance R 6, resistance R 7, metal-oxide-semiconductor Q4, resistance R 12 in turn, and this resistance R 12 connects power supply VCC1.
Furthermore, in technique scheme, described the 3rd divider resistance R16 two ends parallel connection one is for anti-interference capacitor C11.
Furthermore, in technique scheme, the first pin ground connection of described parallel voltage-stabilizing control circuit chip, crus secunda connects four pin of photo-coupler, and the tripod of this parallel voltage-stabilizing control circuit chip is connected between the source electrode and the 3rd divider resistance R16 of metal-oxide-semiconductor Q7, and coordinate the first divider resistance R14, the second divider resistance R15 and the 3rd divider resistance R16, resistance R 6, resistance R 7, metal-oxide-semiconductor Q4, resistance R 12 to be combined to form a comparator circuit.
Furthermore, in technique scheme, a resistance R 18 in parallel between the tripod of described photo-coupler and the 4th pin, and the 4th pin meets power supply VCC1 after connecting a resistance R 17, the first pin connects 7.5V power supply, ground connection after crus secunda contact resistance R19, the parallel circuit that formed by resistance R 20 and capacitor C 12, and resistance R 19 is also connected with the tripod of control chip U3 in described power management integrated circuit.
Furthermore, in technique scheme, principle of work is: in the time that power supply VCC1 has power supply, metal-oxide-semiconductor Q4 and metal-oxide-semiconductor Q7 conducting, described comparator circuit work, and charging capacitor C1 is carried out to voltage detecting, when charging capacitor C1 both end voltage is higher than 320V DC or when above, the crus secunda of parallel voltage-stabilizing control circuit chip is that low electricity is commented, power supply VCC1 voltage is powered to photo-coupler through resistance R 17, make photo-coupler work, make the voltage of described 7.5V power supply through resistance R 19, resistance R 20 and capacitor C 12 provide high level to the tripod of control chip U3 in described power management integrated circuit, to transmit PG IN signal, when charging capacitor C1 both end voltage is during lower than 320V DC, the crus secunda of parallel voltage-stabilizing control circuit chip is that high electricity is commented, and photo-coupler is not worked, and making the tripod of control chip U3 in described power management integrated circuit is low level, so that does not transmit PG IN signal.
Adopt after technique scheme, the utility model has following beneficial effect compared with prior art: in the time that power supply VCC1 does not power, metal-oxide-semiconductor Q4 and not conducting of metal-oxide-semiconductor Q7, in the time that power supply VCC1 has power supply, metal-oxide-semiconductor Q4 and metal-oxide-semiconductor Q7 conducting, can realize energy-saving effect like this.In addition, in the time of metal-oxide-semiconductor Q4 and metal-oxide-semiconductor Q7 conducting, described comparator circuit work, and charging capacitor C1 is carried out to voltage detecting, when charging capacitor C1 both end voltage is higher than 320V DC or when above, the crus secunda of parallel voltage-stabilizing control circuit chip is that low electricity is commented, power supply VCC1 voltage is powered to photo-coupler through resistance R 17, make photo-coupler work, the voltage that makes described 7.5V power supply through resistance R 19, resistance R 20 and capacitor C 12 to described power management integrated circuit in the tripod of control chip U3 high level is provided, to transmit PG IN signal; When charging capacitor C1 both end voltage is during lower than 320V DC, the crus secunda of parallel voltage-stabilizing control circuit chip is that high electricity is commented, and photo-coupler is not worked, and making the tripod of control chip U3 in described power management integrated circuit is low level, so that does not transmit PG IN signal.Be that the utility model can be realized PG semiotic function and superpotential and voltage protection for a long time, realized AC functional switch machine, easy aircraft bombing problem while also having solved short circuit+12V voltage simultaneously.
accompanying drawing explanation:
Fig. 1 is the circuit diagram that computer power circuit of the present utility model is installed;
Fig. 2 is the circuit diagram of existing control circuit.
embodiment:
Below in conjunction with specific embodiments and the drawings, the utility model is further illustrated.
Shown in Figure 1, for a kind of computer power circuit, it comprises: AC input end 31, EMC filtering circuit 32, bridge rectifier circuit 1, upper voltage anti-impact circuit 2, PFC control circuit 33, main-transformer 34, voltage follower circuit 35 and power management integrated circuit 39 and the energy-saving electric power load control circuit 36, computer power signal controlling 37, the modulating frequency and width control circuit 38 that are connected with power management integrated circuit 39 respectively.
Described power supply signal control circuit 37 comprises: a bleeder circuit 371 and the parallel voltage-stabilizing control circuit chip 372, the photo-coupler 373 that are connected with bleeder circuit 371, and be connected with the control chip U3 of power management integrated circuit 39 in computer power circuit by after this photo-coupler 373 contact resistance R19, bleeder circuit 371 is parallel to the charging capacitor C1 two ends of Electrified anti-impact circuit 2 in computer power circuit, and bleeder circuit 371 includes a metal-oxide-semiconductor Q7 as switch.
Described bleeder circuit 271 also comprises: the first divider resistance R14, the second divider resistance R15, the 3rd divider resistance R16 that are connected in series successively, wherein, the drain electrode of metal-oxide-semiconductor Q7 and source electrode are connected between the second divider resistance R15 and the 3rd divider resistance R16, metal-oxide-semiconductor Q7 grid connects the rear connection power supply of a resistance R 13 VCC1, the 3rd divider resistance R16 ground connection.In addition, described first divider resistance R14 one end is also connected with resistance R 6, resistance R 7, metal-oxide-semiconductor Q4, resistance R 12 in turn, and this resistance R 12 connects power supply VCC1.Described the 3rd divider resistance R16 two ends parallel connection one is for anti-interference capacitor C11.
The first pin ground connection of described parallel voltage-stabilizing control circuit chip 372, crus secunda connects four pin of photo-coupler 373, and the tripod of this parallel voltage-stabilizing control circuit chip 372 is connected between the source electrode and the 3rd divider resistance R16 of metal-oxide-semiconductor Q7, and coordinate the first divider resistance R14, the second divider resistance R15 and the 3rd divider resistance R16, resistance R 6, resistance R 7, metal-oxide-semiconductor Q4, resistance R 12 to be combined to form a comparator circuit.
A resistance R 18 in parallel between the tripod of described photo-coupler 373 and the 4th pin, and the 4th pin meets power supply VCC1 after connecting a resistance R 17, the first pin connects 7.5V power supply, ground connection after crus secunda contact resistance R19, the parallel circuit that formed by resistance R 20 and capacitor C 12, and resistance R 19 is also connected with the tripod of control chip U3 in described power management integrated circuit 39.
Principle of work is: in the time that power supply VCC1 does not power, and metal-oxide-semiconductor Q4 and not conducting of metal-oxide-semiconductor Q7, in the time that power supply VCC1 has power supply, metal-oxide-semiconductor Q4 and metal-oxide-semiconductor Q7 conducting, can realize energy-saving effect like this.In addition, in the time of metal-oxide-semiconductor Q4 and metal-oxide-semiconductor Q7 conducting, described comparator circuit work, and charging capacitor C1 is carried out to voltage detecting, when charging capacitor C1 both end voltage is higher than 320V DC or when above, the crus secunda of parallel voltage-stabilizing control circuit chip 372 is that low electricity is commented, power supply VCC1 voltage is powered to photo-coupler 373 through resistance R 17, photo-coupler 373 is worked, the voltage that makes described 7.5V power supply through resistance R 19, resistance R 20 and capacitor C 12 to described power management integrated circuit 39 in the tripod of control chip U3 high level is provided, to transmit PG IN signal; When charging capacitor C1 both end voltage is during lower than 320V DC, the crus secunda of parallel voltage-stabilizing control circuit chip 372 is that high electricity is commented, photo-coupler 373 is not worked, and making the tripod of control chip U3 in described power management integrated circuit 39 is low level, so that does not transmit PG IN signal.Be that the utility model can be realized PG semiotic function and superpotential and voltage protection for a long time, realized AC functional switch machine, easy aircraft bombing problem while also having solved short circuit+12V voltage simultaneously.
Certainly, the foregoing is only specific embodiment of the utility model, be not to limit the utility model practical range, all according to equivalence variation or modification that described in the utility model claim, structure, feature and principle are done, all should be included in the utility model claim.
Claims (7)
1. the power supply signal control circuit of a computer power circuit, comprise: a bleeder circuit (371) and the parallel voltage-stabilizing control circuit chip (372), the photo-coupler (373) that are connected with bleeder circuit (371), and be connected with the control chip U3 of power management integrated circuit (39) in computer power circuit by after this photo-coupler (373) contact resistance R19, bleeder circuit (371) is parallel to the charging capacitor C1 two ends of Electrified anti-impact circuit in computer power circuit (2), and bleeder circuit (371) includes a metal-oxide-semiconductor Q7 as switch.
2. the power supply signal control circuit of a kind of computer power circuit according to claim 1, it is characterized in that: described bleeder circuit (271) also comprises: the first divider resistance R14, the second divider resistance R15, the 3rd divider resistance R16 that are connected in series successively, wherein, the drain electrode of metal-oxide-semiconductor Q7 and source electrode are connected between the second divider resistance R15 and the 3rd divider resistance R16, metal-oxide-semiconductor Q7 grid connects the rear connection power supply of a resistance R 13 VCC1, the 3rd divider resistance R16 ground connection.
3. the power supply signal control circuit of a kind of computer power circuit according to claim 2, is characterized in that: described first divider resistance R14 one end is also connected with resistance R 6, resistance R 7, metal-oxide-semiconductor Q4, resistance R 12 in turn, and this resistance R 12 connects power supply VCC1.
4. the power supply signal control circuit of a kind of computer power circuit according to claim 3, is characterized in that: described the 3rd divider resistance R16 two ends parallel connection one is for anti-interference capacitor C11.
5. the power supply signal control circuit of a kind of computer power circuit according to claim 3, it is characterized in that: the first pin ground connection of described parallel voltage-stabilizing control circuit chip (372), crus secunda connects four pin of photo-coupler (373), and the tripod of this parallel voltage-stabilizing control circuit chip (372) is connected between the source electrode and the 3rd divider resistance R16 of metal-oxide-semiconductor Q7, and coordinate the first divider resistance R14, the second divider resistance R15 and the 3rd divider resistance R16, resistance R 6, resistance R 7, metal-oxide-semiconductor Q4, resistance R 12 to be combined to form a comparator circuit.
6. the power supply signal control circuit of a kind of computer power circuit according to claim 5, it is characterized in that: a resistance R 18 in parallel between the tripod of described photo-coupler (373) and the 4th pin, and the 4th pin meets power supply VCC1 after connecting a resistance R 17, the first pin connects 7.5V power supply, ground connection after crus secunda contact resistance R19, the parallel circuit that formed by resistance R 20 and capacitor C 12, and resistance R 19 is also connected with the tripod of control chip U3 in described power management integrated circuit (39).
7. the power supply signal control circuit of a kind of computer power circuit according to claim 6, it is characterized in that: principle of work is: in the time that power supply VCC1 has power supply, metal-oxide-semiconductor Q4 and metal-oxide-semiconductor Q7 conducting, described comparator circuit work, and charging capacitor C1 is carried out to voltage detecting, when charging capacitor C1 both end voltage is higher than 320V DC or when above, the crus secunda of parallel voltage-stabilizing control circuit chip (372) is that low electricity is commented, power supply VCC1 voltage is powered to photo-coupler (373) through resistance R 17, make photo-coupler (373) work, make the voltage of described 7.5V power supply through resistance R 19, resistance R 20 and capacitor C 12 provide high level to the tripod of control chip U3 in described power management integrated circuit (39), to transmit PG IN signal, when charging capacitor C1 both end voltage is during lower than 320V DC, the crus secunda of parallel voltage-stabilizing control circuit chip (372) is that high electricity is commented, photo-coupler (373) is not worked, and making the tripod of control chip U3 in described power management integrated circuit (39) is low level, so that does not transmit PG IN signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420025409.4U CN203706130U (en) | 2014-01-16 | 2014-01-16 | Power supply signal control circuit of computer power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420025409.4U CN203706130U (en) | 2014-01-16 | 2014-01-16 | Power supply signal control circuit of computer power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203706130U true CN203706130U (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420025409.4U Expired - Fee Related CN203706130U (en) | 2014-01-16 | 2014-01-16 | Power supply signal control circuit of computer power supply circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN203706130U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114461047A (en) * | 2021-12-31 | 2022-05-10 | 深圳微步信息股份有限公司 | Power management circuit of computer mainboard |
-
2014
- 2014-01-16 CN CN201420025409.4U patent/CN203706130U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114461047A (en) * | 2021-12-31 | 2022-05-10 | 深圳微步信息股份有限公司 | Power management circuit of computer mainboard |
| CN114461047B (en) * | 2021-12-31 | 2024-02-23 | 深圳微步信息股份有限公司 | Computer motherboard power management circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20170116 |