CN103095149B - Power supply unit - Google Patents
Power supply unit Download PDFInfo
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- CN103095149B CN103095149B CN201110339349.4A CN201110339349A CN103095149B CN 103095149 B CN103095149 B CN 103095149B CN 201110339349 A CN201110339349 A CN 201110339349A CN 103095149 B CN103095149 B CN 103095149B
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- power supply
- unit
- power
- internal circuit
- output
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Abstract
The invention discloses a kind of power supply unit, comprise an output, a power conversion unit, an internal circuit and an internal electric source feeding unit.Output exports one first power supply.Power conversion unit couples output and receives the first power supply, and the first Power convert is a second source by power conversion unit.Internal circuit couples power conversion unit and receives second source.Internal electric source feeding unit couples internal circuit.
Description
Technical field
The present invention relates to a kind of power supply unit, and in particular to be applied to external loading be non-loaded and power supply unit technology under light-load conditions.
Background technology
Power supply unit is a kind of electronic product very generally applied in daily life.Nearly all electric equipment products all possess power supply unit, use to electronic product intraware or electronic component to supply power supply.In power supply unit field, (as non-loaded, underload or heavy duty) will cause the change of the incident energy conversion efficiency of power supply unit when the load.
Please refer to shown in Fig. 1, it is the schematic diagram of existing power supply supply.Power supply unit 1 has power rectifier unit 11 and an output 12.Power rectifier unit 11 is connected with output 12, supplies an external loading use by output 12 to export an output voltage Vo.In addition, for making the output voltage Vo of power supply unit 1 under external loading is underload or non-loaded situation, also for the voltage of stable output or output voltage can be fixed within certain scope, therefore prior art arranges multiple resistance R1, R2 ~ Rn in output 12, it is made to produce load, with regulated output voltage Vo.But when measuring the efficiency of power supply unit 1, because those resistance R1, R2 ~ Rn is arranged at the inside of power supply unit 1, therefore those resistance R1, R2 ~ Rn certainly will the power of loss power supply unit 1, and then cause overall efficiency to reduce.Although after those resistance R1, R2 ~ Rn is removed, can improve the efficiency of power supply unit 1, but when external loading be underload or non-loaded time, output voltage Vo can be caused unstable, and also can produce ripple noise (Ripple noise).
Therefore, how a kind of power supply unit is provided, can regulated output voltage, and when external loading be underload or non-loaded time, power loss can be reduced, promote the energy utilization rate of power supply unit, and decrease in the use of the electronic component (as resistance) of output, reduce production cost.
Summary of the invention
Because above-mentioned problem, object of the present invention, can regulated output voltage for providing a kind of power supply unit, and in underload or non-loaded time, can power loss be reduced, promote the energy utilization rate of power supply unit.
Because above-mentioned problem, other objects of the present invention, for providing a kind of power supply unit, can decrease in use or the setting of output electronic component, to reduce production cost, save space.
In order to achieve the above object, the invention provides a kind of power supply unit and comprise an output, a power conversion unit, an internal circuit and an internal electric source feeding unit.Output exports one first power supply.Power conversion unit couples output and receives the first power supply, and the first Power convert is a second source by power conversion unit.Internal circuit couples power conversion unit and receives second source.Internal electric source feeding unit couples internal circuit.
In a preferred embodiment of the present invention, power conversion unit has Zener diode and a resistance.Wherein, resistance can be current-limiting resistance.
In a preferred embodiment of the present invention, internal circuit has at least one electronic component.Wherein, electronic component optional in wafer, resistance, electric capacity, transistor at least one of them.
In order to achieve the above object, the invention provides another kind of power supply unit and comprise one first output, a power conversion unit, one second output, an internal circuit and an internal electric source feeding unit.First output exports one first power supply.Power conversion unit couples the first output and receives the first power supply, and the first Power convert is a second source by power conversion unit.Second output couples power conversion unit and exports second source.Internal electric source feeding unit couples internal circuit.
In a preferred embodiment of the present invention, power supply unit also comprises a control element, couples power conversion unit and internal circuit; Control element controls second source to be supplied to internal circuit and uses, or is supplied to external loading use via the second output output.
From the above, the first Power convert that output exports with power conversion unit by power supply unit of the present invention is for second source, in more detail, when with the external loading that power supply unit is originally connected be underload or non-loaded time, power conversion unnecessary for the first power supply not exporting external loading to is second source by power conversion unit, give internal circuit or other exterior electrical components use this second source to provide, effectively to use power supply, improve the utilance of the energy.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing power supply supply;
Fig. 2 is the schematic diagram of the power supply unit according to present pre-ferred embodiments;
Fig. 3 is the schematic diagram according to power conversion unit of the present invention;
Fig. 4 is the schematic diagram of the power supply unit according to another preferred embodiment of the present invention;
Fig. 5 is the schematic diagram according to the present invention's power supply unit of a preferred embodiment again.
Wherein, description of reference numerals is as follows:
1,2,3,4: power supply unit
11,21,31,41: power rectifier unit
12,22: output
32,42: the first outputs
23,33,43: power conversion unit
231: Zener diode
232, R1, R2 ~ Rn: resistance
24,35,45: internal circuit
25,36,46: internal electric source feeding unit
34,44: the second outputs
47: control element
A: external loading
V1: the first power supply
V2: second source
V3: the three power supply
Vo: output voltage
Embodiment
Hereinafter with reference to correlative type, a kind of power supply unit according to present pre-ferred embodiments is described, wherein identical element is illustrated with identical reference marks.
Please refer to shown in Fig. 2, it is the schematic diagram of a kind of power supply unit according to present pre-ferred embodiments.Power supply unit 2 comprises power rectifier unit 21, output 22, power conversion unit 23, internal circuit 24 and an internal electric source feeding unit 25.Power supply unit 2, in order to the civil power of AC power is converted to galvanic current source, as 12V or 5V etc., gives external loading A to supply power supply.First need to state clearly, it is under non-loaded or underloaded state that power supply unit 2 of the present invention is applicable to external loading A, and certainly, it is under heavy duty state that power supply unit 2 of the present invention also can be applicable to external loading A.The external loading A of the present embodiment is such as but not limited to fan, light-emitting component, server or computer system etc.What deserves to be explained is, the internal circuit 24 of the present embodiment is arranged in power supply unit 2, and be in order to running and the circuit performing power supply unit 2 start, internal electric source feeding unit 25 is in order to provide power supply to give circuit in power supply unit 2, and external loading A is connected with the output 22 of power supply unit 2, external loading A and power supply unit 2 are arranged respectively.
Output 22 and power rectifier unit 21 couple, the one first power supply V1 that output 22 out-put supply rectification unit 21 produces.
Power conversion unit 23 couples output 22 and receives the first power supply V1, and the first power supply V1 is converted to a second source V2 by power conversion unit 23.Please refer to shown in Fig. 3, it is the schematic diagram of power conversion unit of the present invention.Power conversion unit 23 comprises a clamp circuit, in order to be positioned to by the voltage of input in required direct voltage position standard.Clamp circuit has Zener diode 231 and a resistance 232, and Zener diode 231 and resistance 232 are connected in series.Wherein, Zener diode 231 has the function of burning voltage, and resistance 232 is current-limiting resistance, to avoid the electric current flowing through power conversion unit 23 excessive.In more detail, such as, when the first power supply V1 is 12V, power conversion unit 23 receives the first power supply V1, and with Zener diode 231 and resistance 232, the 12V of the first power supply V1 is converted to such as 5V or 3V, is second source V2.
Internal circuit 24 couples power conversion unit 23 and receives second source V2.Internal circuit 24 has at least one electronic component (not shown), wherein at least one electronic component optional in wafer, resistance, electric capacity, transistor at least one of them.In details of the words, internal circuit 24 receives second source V2, and powers to electronic component with second source V2.
It should be noted that, when the external loading A be connected with power supply unit 2 is heavy duty, the power rectifier unit 21 of the present embodiment exports the first power supply V1 with output 22 and gives external loading A.But, when the external loading A be connected with power supply unit 1 be underload or non-loaded time, the the first power supply V1 not exporting external loading A to is converted to second source V2 by the power conversion unit 23 of the present embodiment, the electronic component giving internal circuit 24 to provide electric power uses, and can by the energy of script power loss, conversion recycling, improves energy utilization rate.
Internal electric source feeding unit 25 couples internal circuit 24, and exports one the 3rd power supply V3 and give internal circuit 24.When external loading A is heavy duty, the first whole power supply V1 output is given external loading A via output 22 by power rectifier unit 21, and power conversion unit 23 cannot export second source V2 when giving internal circuit 24, internal electric source feeding unit 25 exports the 3rd power supply V3 and gives internal circuit 24.
When external loading A is underload, first power supply V1 of part exports and gives external loading A by output 22, then remaining first power supply V1 is converted to second source V2 by power conversion unit 23, if when the second source V2 that power conversion unit 23 exports is not enough to allow internal circuit 24 start, then export the 3rd power supply V3 by internal electric source feeding unit 25 and give internal circuit 24, to supply the power supply needed for internal circuit 24, to make the normal start of electronic component energy in internal circuit 24.
When external loading A is non-loaded, first power supply V1 is converted to second source V2 by power conversion unit 23, if the second source V2 that power conversion unit 23 exports be enough to allow the electronic component start of internal circuit 24 time, then internal circuit 24 does not receive the 3rd power supply V3 that internal electric source feeding unit 25 exports.Above-described execution mode, in order to illustrate, is not used to limit the present invention.
In addition, the internal circuit 24 of the present embodiment has a controller (not shown), and it receives the second source V2 of power conversion unit 23 output or the 3rd power supply V3 of internal electric source feeding unit 25 output in order to control internal circuit 24.In more detail, when the second source V2 that power conversion unit 23 exports is not enough to allow internal circuit 24 start, then control internal electric source feeding unit 25 is connected with internal circuit 24 by the controller of internal circuit 24, make internal electric source feeding unit 25 export the 3rd power supply V3 and give internal circuit 24, to supply the power supply needed for internal circuit 24, to make the normal start of electronic component energy in internal circuit 24.When the second source V2 that power conversion unit 23 exports is enough to allow internal circuit 24 start, then control power conversion unit 23 is connected with internal circuit 24 by the controller of internal circuit 24, make power conversion unit 23 export second source V2 and give internal circuit 24, allow internal circuit 24 can normally start.Then namely internal circuit 24 does not receive the 3rd power supply V3 that internal electric source feeding unit 25 exports.Controller can be a transistor, a switch or a comparator, is so not used to limit the present invention.
Please refer to shown in Fig. 4, it is the schematic diagram of the power supply unit of another preferred embodiment of the present invention.Power supply unit 3 comprises power rectifier unit 31,1 first output 32, power conversion unit 33,1 second output 34, internal circuit 35 and an internal electric source feeding unit 36.
First output 32 couples with power rectifier unit 31, the one first power supply V1 that the first output 32 out-put supply rectification unit 31 produces.
Power conversion unit 33 couples the first output 32 and receives the first power supply V1, and the first power supply V1 is converted to a second source V2 by power conversion unit 33.
Second output 34 couples power conversion unit 33, the second source V2 that the second output 34 out-put supply converting unit 33 produces, and is provided by second source V2 the electronic component giving other outsides to use, such as USB slot, keyboard, fan, mouse etc.
Internal electric source feeding unit 36 and internal circuit 35 couple, and internal electric source feeding unit 36 provides one the 3rd power supply V3 to give internal circuit 35, make internal circuit 35 can normally start.Wherein, internal circuit 35 has at least one electronic component, its optional in wafer, resistance, electric capacity, transistor at least one of them.
Please refer to shown in Fig. 5, it is the schematic diagram of the present invention's power supply unit of a preferred embodiment again.Power supply unit 4 comprises power rectifier unit 41,1 first output 42, power conversion unit 43,1 second output 44, internal circuit 45 and an internal electric source feeding unit 46.
The power supply unit 4 of the present embodiment and above-mentioned power supply unit 3 unlike, the present embodiment also comprises a control element 47, couples power conversion unit 43 and internal circuit 45.Control element 47, after the second source V2 receiving power conversion unit 43 output, can be supplied to internal circuit 45 and use; Or control element 47 after the second source V2 receiving power conversion unit 43 output, then can be supplied to the use of other exterior electrical components via the second output 44 output; Or control element 47 also after the second source V2 receiving power conversion unit 43 output, can be supplied to internal circuit 45 and uses and be supplied to the use of other exterior electrical components via the second output 44 output simultaneously.The control element 47 of the present embodiment can be a transistor or a switch, is so not used to limit the present invention.
In sum, the first Power convert that output exports with power conversion unit by power supply unit of the present invention is for second source, in more detail, when with the external loading that power supply unit is originally connected be underload or non-loaded state time, power conversion unnecessary for the first power supply not exporting external loading to is second source by power conversion unit, this second source is used to provide internal circuit or other exterior electrical components, by originally for holding the energy loss of the voltage of the first power supply, conversion recycling, effectively to use power supply, improve the utilance of the energy.
Compared with prior art, power supply unit of the present invention, when external loading is heavy duty state, can normally provide power supply to give external loading; Special when external loading be underload or non-loaded state time, unnecessary power supply supply internal circuit or other exterior electrical components can be used, reduce power loss, promote the energy utilization rate of power supply unit, reduction ripple noise.In addition, more can decrease in electronic component (as the resistance) use amount of output, to reduce production cost, save space.
The foregoing is only illustrative, but not be restricted person.Anyly do not depart from spirit of the present invention and category, and to its equivalent modifications of carrying out or change, all should be contained in accompanying claim.
Claims (13)
1. a power supply unit, comprising:
One output, exports one first power supply;
One power conversion unit, couple this output and receive this first power supply, this first Power convert is a second source by this power conversion unit, wherein this power conversion unit comprises a clamp circuit, this clamp circuit has Zener diode and a resistance, this Zener diode and this resistant series;
One internal circuit, couples this power conversion unit and receives this second source; And
One internal electric source feeding unit, couples this internal circuit;
Wherein, this power supply unit is applied mutually with an external loading, and to be applicable to this external loading be non-loaded or underloaded state; When external loading be non-loaded or underload time, the first Power convert not exporting external loading to is second source by this power conversion unit.
2. power supply unit as claimed in claim 1, wherein this internal circuit has at least one electronic component.
3. power supply unit as claimed in claim 2, wherein this at least one electronic component be selected from wafer, resistance, electric capacity, transistor at least one of them.
4. power supply unit as claimed in claim 1, wherein this internal electric source feeding unit exports one the 3rd power supply to this internal circuit.
5. power supply unit as claimed in claim 4, wherein this internal circuit has a controller, receives this second source of this power conversion unit output or the 3rd power supply of this internal electric source feeding unit output in order to control this internal circuit.
6. a power supply unit, comprising:
One first output, exports one first power supply;
One power conversion unit, couple this first output and receive this first power supply, this first Power convert is a second source by this power conversion unit, wherein this power conversion unit comprises a clamp circuit, this clamp circuit has Zener diode and a resistance, this Zener diode and this resistant series;
One second output, couples this power conversion unit and exports this second source;
One internal circuit; And
One internal electric source feeding unit, couples this internal circuit;
Wherein, this power supply unit is applied mutually with an external loading, and to be applicable to this external loading be non-loaded or underloaded state; When external loading be non-loaded or underload time, the first Power convert not exporting external loading to is second source by this power conversion unit.
7. power supply unit as claimed in claim 6, also comprises:
One control element, couples this power conversion unit and this internal circuit.
8. power supply unit as claimed in claim 7, wherein this control element is transistor.
9. power supply unit as claimed in claim 7, wherein this control element is switch.
10. power supply unit as claimed in claim 6, wherein this internal circuit has at least one electronic component.
11. power supply units as claimed in claim 10, wherein this at least one electronic component be selected from wafer, resistance, electric capacity, transistor at least one of them.
12. power supply units as claimed in claim 6, wherein this internal electric source feeding unit exports one the 3rd power supply to this internal circuit.
13. power supply units as claimed in claim 12, wherein this internal circuit has a controller, receives this second source of this power conversion unit output or the 3rd power supply of this internal electric source feeding unit output in order to control this internal circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110339349.4A CN103095149B (en) | 2011-11-01 | 2011-11-01 | Power supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110339349.4A CN103095149B (en) | 2011-11-01 | 2011-11-01 | Power supply unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103095149A CN103095149A (en) | 2013-05-08 |
| CN103095149B true CN103095149B (en) | 2015-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110339349.4A Expired - Fee Related CN103095149B (en) | 2011-11-01 | 2011-11-01 | Power supply unit |
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| Country | Link |
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| CN (1) | CN103095149B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI534603B (en) * | 2015-07-13 | 2016-05-21 | 善元科技股份有限公司 | Power supply system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533284A (en) * | 2008-03-11 | 2009-09-16 | 华硕电脑股份有限公司 | Voltage regulating device |
| TW201040710A (en) * | 2009-05-12 | 2010-11-16 | Top Victory Invest Ltd | Power supply with reduced power consumption in stand-by mode |
| CN201750346U (en) * | 2010-06-01 | 2011-02-16 | 首利实业股份有限公司 | Power supply with self test and display function |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976961B (en) * | 2009-02-09 | 2015-08-19 | 能源系统技术有限责任公司 | For reducing the technology of the non-loaded power in electronic installation |
-
2011
- 2011-11-01 CN CN201110339349.4A patent/CN103095149B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533284A (en) * | 2008-03-11 | 2009-09-16 | 华硕电脑股份有限公司 | Voltage regulating device |
| TW201040710A (en) * | 2009-05-12 | 2010-11-16 | Top Victory Invest Ltd | Power supply with reduced power consumption in stand-by mode |
| CN201750346U (en) * | 2010-06-01 | 2011-02-16 | 首利实业股份有限公司 | Power supply with self test and display function |
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| Publication number | Publication date |
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| CN103095149A (en) | 2013-05-08 |
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Granted publication date: 20151007 Termination date: 20181101 |