CN203191920U - Main board power supply - Google Patents
Main board power supply Download PDFInfo
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- CN203191920U CN203191920U CN 201320098840 CN201320098840U CN203191920U CN 203191920 U CN203191920 U CN 203191920U CN 201320098840 CN201320098840 CN 201320098840 CN 201320098840 U CN201320098840 U CN 201320098840U CN 203191920 U CN203191920 U CN 203191920U
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Abstract
The utility model discloses a main board power supply. The main board power supply comprises a first power supply circuit and a second power supply circuit, wherein the first power supply circuit (301) is connected with an adapter and used for converting the output voltage of the adapter into a first voltage to be used by a main board; the second power supply circuit (302) is connected with the first power supply circuit (301) and the adapter and used for converting the output voltage of the adapter into a second voltage to be used by the main board under the driving of the output voltage of the first power supply circuit (301). The main board power supply has the advantages of being capable of converting the input voltage of 9-19V of the adapter into the voltage of 5V and the voltage of 3.3V which are required by the main board, enhancing adaptability to the input voltage of the adapter of the main board power supply and reducing cost caused by the situation that the adapter of the main board must be replaced because the main board is replaced.
Description
Technical field
The utility model relates to computer realm, more particularly, relates to a kind of motherboard power supply.
Background technology
Computer motherboard is when work, and wherein each class functional circuit may need the supply voltage of different size.In general, existing computer motherboard need be supplied several voltages such as 12V, 5V, 3.3V usually simultaneously.Yet existing mainboard generally all adopts single 12V or the power supply of 19V adapter, becomes the voltage of various different sizes to use for corresponding circuit this single voltage transitions by mainboard its own power source administrative unit again.Make computer main board that the rated voltage of adapter power supply is required than higher like this.Cause when changing computer main board, must changing power supply simultaneously, increased cost so virtually, also reduced the dirigibility when assembling and use of computer main board power supply.
The utility model content
The technical problems to be solved in the utility model is, the defective that can only adapt to single input voltage at the above-mentioned motherboard power supply of prior art, a kind of motherboard power supply is provided, and this motherboard power supply can be converted to the input voltage of 9-19V 5V and the 3.3V voltage that mainboard needs.
The technical scheme that its technical matters that solves the utility model adopts is:
A kind of motherboard power supply, described motherboard power supply comprises: first power circuit, second source circuit;
Described first power circuit links to each other with adapter, is converted to one first voltage for the output voltage with adapter and uses for mainboard;
Described second source circuit links to each other with described first power circuit, adapter, is used under the output voltage of described first power circuit drives, and the output voltage of adapter is converted to one second voltage uses for mainboard.
Described first power circuit comprises first Switching Power Supply, and this first Switching Power Supply comprises synchronous buck converter, first metal-oxide-semiconductor, second metal-oxide-semiconductor, first inductance, and the model of described synchronous buck converter is TPS40075; Wherein,
The 8th pin of described synchronous buck converter connects the grid of first metal-oxide-semiconductor by first resistance, and the source ground of first metal-oxide-semiconductor, drain electrode connect an end of first inductance, and the other end of first inductance is the output terminal of first power circuit; The 12nd pin connects the grid of second metal-oxide-semiconductor by second resistance, and the source electrode of second metal-oxide-semiconductor connects first inductance, drain electrode connects the adaptor power supplies input end; The 13rd pin and the 15th pin connect the adaptor power supplies input end; Be connected to first electric capacity between the output terminal of first power circuit and the ground.
Described second source circuit comprises the second switch power supply, and this second switch power supply comprises synchronous buck PDM keyer, the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor, second inductance, and the model of described synchronous buck PDM keyer is ISL6545CBZS; Wherein,
The 2nd pin of synchronous buck PDM keyer connects the grid of the 3rd metal-oxide-semiconductor, and the drain electrode of the 3rd metal-oxide-semiconductor connects the end that adaptor power supplies input end, source electrode connect second inductance, and the other end of second inductance is the output terminal of second source circuit; The 4th pin passes through the 3rd resistance eutral grounding, and connects the grid of the 4th metal-oxide-semiconductor, and the source ground of the 4th metal-oxide-semiconductor, drain electrode connect second inductance; The 5th pin connects the output terminal of described first power circuit by the 4th resistance, and passes through second capacity earth; Be connected to the 3rd electric capacity between the output terminal of second source circuit and the ground.
It is characterized in that the 14th pin of described synchronous buck converter connects the adaptor power supplies input end by the 5th resistance, a termination the 14th pin of the 4th electric capacity, another termination adaptor power supplies input end.
The 11st pin of described synchronous buck converter connects the 10th pin by the 5th electric capacity, and the 10th pin connects the output terminal of first power circuit by first inductance, and the 9th pin connects the 11st pin by diode.
The 8th pin of described synchronous buck PDM keyer connects second inductance, and connects the 1st pin, connects the 2nd pin by the 6th resistance by the 6th electric capacity.
The input voltage of described adapter is 9-19V, and the output voltage of described first power circuit output end is 5V, and the output voltage of described second source circuit output end is 3.3V.
Implement motherboard power supply of the present utility model, has following beneficial effect: the adapter input voltage of 9-19V can be converted to 5V and 3.3V voltage that mainboard needs, increased the adaptability of motherboard power supply to the adapter input voltage, reduced because changing the more cost that produces of changer adapter of mainboard.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is motherboard power supply circuit structure diagram of the present utility model;
Fig. 2 is the circuit diagram of first power circuit in the utility model preferred embodiment;
Fig. 3 is the circuit diagram of second source circuit in the utility model preferred embodiment.
Embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
Embodiment of the present utility model is applicable to a power supply 300 and cooperates that the voltage transitions that this power supply 300 is provided is to be suitable for the voltage that mainboard uses.This power supply 300 can be the existing adapter that is used to the computer motherboard power supply, and its output voltage that provides is generally the DC voltage of 9-19V.
The circuit structure diagram of the motherboard power supply that Fig. 1 provides for the utility model preferred embodiment.This motherboard power supply comprises first power circuit 301 and second source circuit 302, wherein first power circuit is used for the output voltage that power supply 300 provides is converted to one first voltage that mainboard uses, and the second source circuit is used for the output voltage that power supply 300 provides is converted to one second voltage that mainboard uses.This first voltage is 5V in the present embodiment, and this second voltage is 3.3V.
During use, the output voltage of power supply 300 obtains the 5V power supply through first power circuit, 301 conversion backs and supplies with mainboard 303; The output voltage of power supply 300 obtains the 3.3V power supply through second source circuit 302 conversion backs and supplies with mainboard 303.The power supply that other mainboards need, can change together and get by first power circuit 301, second source circuit 302 and power supply 300 as memory power supply, cpu power, video card power supply, network interface card power supply etc., thereby provide power supply, feed system work for all loads of computer.
Fig. 2 is the circuit diagram of first power circuit in the preferred embodiment of the present utility model, and Vout1 is the output terminal of first power circuit 301 among the figure; VIN is the adaptor power supplies input end; + VCC5AL is the 5V voltage feedback input end of synchronous buck converter U51, makes the output of 5V voltage more stable by feedback.
Described first power circuit 301 comprises the Switching Power Supply of mainly being made up of synchronous buck converter U51, the first metal-oxide-semiconductor Q81, the second metal-oxide-semiconductor Q80, first inductance L 19, and the model of described synchronous buck converter U51 is TPS40075; Wherein,
The 8th pin of described synchronous buck converter U51 connects the grid of the first metal-oxide-semiconductor Q81 by first resistance R 794, and the source ground of the first metal-oxide-semiconductor Q81, drain electrode connect an end of first inductance L 19, and the other end of first inductance L 19 is the output terminal of first power circuit 301; The 12nd pin connects the grid of the second metal-oxide-semiconductor Q80 by second resistance R 787, and the source electrode of the second metal-oxide-semiconductor Q80 connects first inductance L 19, drain electrode connects the adaptor power supplies input end; The 13rd pin and the 15th pin connect the adaptor power supplies input end.
Described synchronous buck converter U51 the 1st, 3,7,19,21 pin ground connection, the 20th pin is 5V voltage feedback input end, is connected to filter capacitor C408 between the 20th pin and the ground; By the 20th pin the 5V voltage of exporting is fed back to synchronous buck converter U51; The 2nd pin is by the resistance R 789 and resistance R 786 ground connection of series connection, and resistance R 790 is with after capacitor C 1049 is connected, a termination the 2nd pin, and the other end links to each other with resistance R 786; The 5th pin is by resistance R 786 ground connection; Resistance R 793 and capacitor C 1046 series connection back one termination the 6th pin, the other end links to each other with resistance R 786; Capacitor C 1,047 one terminations the 6th pin, the other end links to each other with resistance R 786; 2nd, 5,6 pin play compensation, when existing temperature etc. to disturb, can compensate the output of 5V voltage; The 4th pin is by capacitor C 1045 ground connection, by the size that electric capacity is set the soft-start time of metal-oxide-semiconductor is set, the loss when reducing metal-oxide-semiconductor and starting; The 14th pin meets VIN by the 5th resistance R 792, the 4th capacitor C 410 1 terminations the 14th pin, and another termination VIN plays overcurrent protection and short-circuit protection; The 16th pin is by resistance R 788 ground connection; The 10th pin connects the 5V voltage output end by first inductance L 19, and the 5V voltage of exporting is fed back to synchronous buck converter U51; The 11st pin connects the 10th pin by the 5th capacitor C 1039; The 9th pin is by capacitor C 276 ground connection; The 17th pin is by capacitor C 279 ground connection; The 15th pin meets VIN by resistance R 791; The 13rd pin meets VIN, voltage is provided for synchronous buck converter U51; Be connected to diode D10 between the 9th pin and the 11st pin.
Be connected to first capacitor C 407 and capacitor C 1048 between the output terminal of described first power circuit 301 and the ground respectively.
When the 12nd pin output high level, during the 8th pin output low level, the second metal-oxide-semiconductor Q80 conducting, the first metal-oxide-semiconductor Q81 ends.When the 12nd pin output low level, during the 8th pin output high level, the second metal-oxide-semiconductor Q80 ends, the first metal-oxide-semiconductor Q81 conducting.First inductance L 19 and first capacitor C 407 are formed low-pass filter, the DC component of VIN can be passed through, and the harmonic component of inhibition VIN are passed through; By the parameter of configuration inductance and electric capacity, can make VIN pass through to export 5V voltage behind the low-pass filter.
One termination adaptor voltages input end of capacitor C 667, other end ground connection is played filtering; One termination adaptor voltages input end of capacitor C 409, other end ground connection; One termination adaptor voltages input end of capacitor C 662, other end ground connection; One termination adaptor voltages input end of capacitor C 406, other end ground connection.Capacitor C 667, C409, C406 are for filtering and the function of momentary current is provided, and when the load acute variation, play the effect that electric current is provided.
Be configured by the parameter to each element among Fig. 2, the scope of the static ripple of output is limited in the 50mv, output current can reach 6A.And 5V power circuit of the present utility model has overheat protector function, overcurrent protection function, short-circuit protection function.The first metal-oxide-semiconductor Q81 and the second metal-oxide-semiconductor Q80 can be integrated in the encapsulation, make the volume of power module circuitry littler, are beneficial to the control of PCB layout and cost.
Fig. 3 is the circuit diagram of second source circuit in the utility model preferred embodiment.Vout2 is the output terminal of second source circuit 302 among Fig. 3; VIN is the adaptor power supplies input end; Vout1 is the output terminal of first power circuit, the 5V voltage of this output terminal output is as the supply voltage of synchronous buck PDM keyer U52, therefore, have only after first power circuit 301 is started working and exported 5V voltage, the synchronous buck PDM keyer U52 of second source circuit 302 just can start working.
Described second source circuit 302 comprises the Switching Power Supply of mainly being made up of synchronous buck PDM keyer U52, the 3rd metal-oxide-semiconductor PQ33A, the 4th metal-oxide-semiconductor PQ32B, second inductance L 16, and the model of described synchronous buck PDM keyer U52 is ISL6545CBZS; Wherein,
The 2nd pin of synchronous buck PDM keyer U52 connects the grid of the 3rd metal-oxide-semiconductor PQ33A, the drain electrode of the 3rd metal-oxide-semiconductor PQ33A connects the end that adaptor power supplies input end, source electrode connect second inductance L 16, and the other end of second inductance L 16 is the output terminal of second source circuit 302; The 4th pin passes through the 3rd resistance R 757 ground connection, and connects the grid of the 4th metal-oxide-semiconductor PQ32B, and the source ground of the 4th metal-oxide-semiconductor PQ32B, drain electrode connect second inductance L 16; The 5th pin connects the output terminal of described first power circuit 301 by the 5th resistance R 714, and passes through first capacitor C, 442 ground connection.
The 3rd pin ground connection of synchronous buck PDM keyer U52; The 5th pin meets the 5V voltage output end Vout1 of first power circuit 301 by resistance R 714, connects second capacitor C 442 between the 5th pin and the ground; Be connected to capacitor C 444 between the 1st pin and the 8th pin; The 8th pin meets second source circuit 302 output end vo ut2 by second inductance L 16; A termination the 7th pin after resistance R 692 is connected with capacitor C 458, another termination the 6th pin; Capacitor C 445 1 terminations the 7th pin, another termination the 6th pin; Be connected to resistance R 716 between the 6th pin and second source circuit 302 output end vo ut2, a termination the 6th pin after resistance R 715 is connected with capacitor C 457, another termination second source circuit 302 output end vo ut2; Be connected to resistance R 739 between the 6th pin and the ground; Be connected to resistance R 686 between the 2nd pin and the 8th pin; Connect between node between the drain electrode of second inductance L 16 and metal-oxide-semiconductor PQ32B and the ground and be connected to resistance R 740 and capacitor C 448; Be connected to resistance R 757 between the 4th pin and the ground; One termination second source circuit, the 302 output end vo ut2 of capacitor C 1065, other end ground connection; One termination VIN of capacitor C 666, other end ground connection; One termination VIN of capacitor C 401, other end ground connection.
Be connected to the 3rd capacitor C 661 and capacitor C 1065 between the output terminal of described second source circuit 302 and the ground respectively.
When the 2nd pin output high level of synchronous buck PDM keyer U52, during the 4th pin output low level, the 3rd metal-oxide-semiconductor PQ33A conducting, the 4th metal-oxide-semiconductor PQ32B ends.When the 2nd pin output low level, during the 4th pin output high level, the 3rd metal-oxide-semiconductor PQ33A ends, the 4th metal-oxide-semiconductor PQ32B conducting.
Second inductance L 16 and the 3rd capacitor C 661 are formed low-pass filter, the DC component of VIN can be passed through, and the harmonic component of inhibition VIN are passed through; By the parameter of configuration inductance and electric capacity, can make VIN pass through to export 3V voltage behind the low-pass filter.
In second source circuit 302 of the present utility model, because the design of voltage feedback and harmonic compensation makes the 3.3V voltage of output more accurately with stable, has overheat protector, overcurrent protection, functions such as short-circuit protection.Can make output current can reach 6A by the configuration to each device parameters.In side circuit, the 3rd metal-oxide-semiconductor PQ33A and the 4th metal-oxide-semiconductor PQ32B can be integrated in the encapsulation, to reduce the shared spatial area of components and parts, are beneficial to the reduction of PCB layout and cost of products.
Motherboard power supply of the present utility model can be converted to the adapter output voltage of 9-19V 5V and the 3.3V voltage that mainboard needs; increased the adaptability of motherboard power supply to the adapter input voltage; reduced because changing the more cost that produces of changer adapter of mainboard; and have the advantage that output is stable, degree of accuracy is high, have overheat protector, overcurrent protection and short-circuit protection function.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not breaking away under the scope situation that the utility model aim and claim protect, also can make a lot of forms, these all belong within the protection of the present utility model.
Claims (7)
1. a motherboard power supply is characterized in that, described motherboard power supply comprises: first power circuit (301), second source circuit (302);
Described first power circuit (301) links to each other with adapter, is converted to one first voltage for the output voltage with adapter and uses for mainboard;
Described second source circuit (302) links to each other with described first power circuit (301), adapter, is used under the output voltage of described first power circuit (301) drives, and the output voltage of adapter is converted to one second voltage uses for mainboard.
2. motherboard power supply according to claim 1, it is characterized in that, described first power circuit (301) comprises first Switching Power Supply, this first Switching Power Supply comprises synchronous buck converter (U51), first metal-oxide-semiconductor (Q81), second metal-oxide-semiconductor (Q80), first inductance (L19), and the model of described synchronous buck converter (U51) is TPS40075; Wherein,
The 8th pin of described synchronous buck converter (U51) connects the grid of first metal-oxide-semiconductor (Q81) by first resistance (R794), the source ground of first metal-oxide-semiconductor (Q81), drain electrode connect an end of first inductance (L19), and the other end of first inductance (L19) is the output terminal of first power circuit (301); The 12nd pin connects the grid of second metal-oxide-semiconductor (Q80) by second resistance (R787), and the source electrode of second metal-oxide-semiconductor (Q80) connects first inductance (L19), drain electrode connects the adaptor power supplies input end; The 13rd pin and the 15th pin connect the adaptor power supplies input end; Be connected to first electric capacity (C407) between the output terminal of first power circuit (301) and the ground.
3. motherboard power supply according to claim 1, it is characterized in that, described second source circuit (302) comprises the second switch power supply, this second switch power supply comprises synchronous buck PDM keyer (U52), the 3rd metal-oxide-semiconductor (PQ33A), the 4th metal-oxide-semiconductor (PQ32B), second inductance (L16), and the model of described synchronous buck PDM keyer (U52) is ISL6545CBZS; Wherein,
The 2nd pin of synchronous buck PDM keyer (U52) connects the grid of the 3rd metal-oxide-semiconductor (PQ33A), the drain electrode of the 3rd metal-oxide-semiconductor (PQ33A) connects the end that adaptor power supplies input end, source electrode connect second inductance (L16), and the other end of second inductance (L16) is the output terminal of second source circuit (302); The 4th pin passes through the 3rd resistance (R757) ground connection, and connects the grid of the 4th metal-oxide-semiconductor (PQ32B), and the source ground of the 4th metal-oxide-semiconductor (PQ32B), drain electrode connect second inductance (L16); The 5th pin connects the output terminal of described first power circuit (301) by the 4th resistance (R714), and passes through second electric capacity (C442) ground connection; Be connected to the 3rd electric capacity (C661) between the output terminal of second source circuit (302) and the ground.
4. motherboard power supply according to claim 2, it is characterized in that, the 14th pin of described synchronous buck converter (U51) connects the adaptor power supplies input end by the 5th resistance (R792), a termination the 14th pin of the 4th electric capacity (C410), another termination adaptor power supplies input end.
5. motherboard power supply according to claim 2, it is characterized in that, the 11st pin of described synchronous buck converter (U51) connects the 10th pin by the 5th electric capacity (C1039), the 10th pin connects the output terminal of first power circuit (301) by first inductance (L19), and the 9th pin connects the 11st pin by diode (D10).
6. motherboard power supply according to claim 3 is characterized in that, the 8th pin of described synchronous buck PDM keyer (U52) connects second inductance (L16), and connects the 1st pin, connects the 2nd pin by the 6th resistance (R686) by the 6th electric capacity (C444).
7. motherboard power supply according to claim 1, it is characterized in that, the input voltage of described adapter is 9-19V, and the output voltage of described first power circuit (301) output terminal is 5V, and the output voltage of described second source circuit (302) output terminal is 3.3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320098840 CN203191920U (en) | 2013-03-05 | 2013-03-05 | Main board power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320098840 CN203191920U (en) | 2013-03-05 | 2013-03-05 | Main board power supply |
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| CN203191920U true CN203191920U (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320098840 Expired - Fee Related CN203191920U (en) | 2013-03-05 | 2013-03-05 | Main board power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108566082A (en) * | 2018-02-08 | 2018-09-21 | 深圳市微电元科技有限公司 | A kind of direct current ATX power supplys for supporting various input voltage |
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2013
- 2013-03-05 CN CN 201320098840 patent/CN203191920U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108566082A (en) * | 2018-02-08 | 2018-09-21 | 深圳市微电元科技有限公司 | A kind of direct current ATX power supplys for supporting various input voltage |
| CN108566082B (en) * | 2018-02-08 | 2024-02-23 | 深圳市微电元科技有限公司 | Direct-current ATX power supply supporting multiple input voltages |
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