CN107977042A - A kind of power circuit and adapter - Google Patents
A kind of power circuit and adapter Download PDFInfo
- Publication number
- CN107977042A CN107977042A CN201711243569.0A CN201711243569A CN107977042A CN 107977042 A CN107977042 A CN 107977042A CN 201711243569 A CN201711243569 A CN 201711243569A CN 107977042 A CN107977042 A CN 107977042A
- Authority
- CN
- China
- Prior art keywords
- circuit
- current
- module
- output
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005070 sampling Methods 0.000 claims abstract description 31
- 230000000052 comparative effect Effects 0.000 claims description 7
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 19
- 230000005611 electricity Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 102220016953 rs397517894 Human genes 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
- G05F3/02—Regulating voltage or current
- G05F3/08—Regulating voltage or current wherein the variable is dc
- G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
- G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
- G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
- G05F3/26—Current mirrors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Nonlinear Science (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to power management Design technical field, more particularly to a kind of power circuit and adapter.Wherein, which includes：Main circuit module；Current mirror module, the input terminal of current mirror module and the output terminal of main circuit module connect, for sampling the output current of main circuit module；The output terminal connection of control module, control module and current mirror module, for adjusting the output power of main circuit module according to the output current of sampling.When being worked due to current mirror module, its power supply without external power supply, and it can adapt to the sampling of high-low voltage, and therefore, which has the characteristics that low in energy consumption, voltage sample scope is wide.
Description
Technical field
The present invention relates to power management Design technical field, more particularly to a kind of power circuit and adapter.
Background technology
Generally, conventional power source equipment is all provided with sample circuit, sample circuit can sample swashing for power-supply device output
Encourage, and feed back to power-supply device, so that power-supply device can export reliable and stable excitation.
Inventor in the implementation of the present invention, it is found that conventional art has at least the following problems：Conventional power source equipment
The sample circuit of offer generally selects transport and placing device or chip, and it needs the supplier of electricity of external power supply to work as collection terminal, because
This, its power consumption is higher.Also, when needing to sample high terminal voltage, since transport and placing device or chip are limited to the limit of supply voltage
System, it has not been able to the sampling needs for meeting high terminal voltage, and therefore, the application range of its sampled voltage is narrow.
The content of the invention
One purpose of the embodiment of the present invention aims to provide a kind of power circuit and adapter, which solves conventional art presence
The low in energy consumption and narrow technical problem of sampled voltage application range.
In order to solve the above technical problems, the embodiment of the present invention provides following technical scheme：
In a first aspect, the embodiment of the present invention provides a kind of power circuit, the power circuit includes：Main circuit module；
Current mirror module, the input terminal of the current mirror module are connected with the output terminal of the main circuit module, for sampling the master
The output current of circuit module；Control module, the control module is connected with the output terminal of the current mirror module, for basis
The output current of sampling adjusts the output power of the main circuit module.
Alternatively, the main circuit module configuration two-way positive voltage outgoing route and both shared end loops all the way
Path；The input terminal of the current mirror module is connected on the two-way positive voltage outgoing route.
Alternatively, the current mirror module includes at least two current lens units；The input of one current lens unit
End is connected to the positive voltage outgoing route, the output terminal of a current lens unit all the way and is connected with the control module；
The input terminal of another current lens unit is connected to positive voltage outgoing route described in another way, another described current mirror list
The output terminal of member is connected with the control module.
Alternatively, the current lens unit includes：Current converter circuit, for sampling and changing, to flow through the positive voltage defeated
The output current of outbound path；Image current source circuit, for the transformed output current of mirror image, exports image current.
Alternatively, the current lens unit further includes：Negative-feedback circuit, for adjusting the image current.
Alternatively, the positive voltage outgoing route is used to export 48 volts of voltages all the way；Positive voltage described in another way exports road
Footpath is used to export 12 volts of voltages.
Alternatively, the power circuit further includes：Dynamic dummy load module, it includes two input terminals, and the dynamic is false
One input terminal of load blocks is connected to all the way on the positive voltage outgoing route, the dynamic dummy load module another
Input terminal is connected to described in another way on positive voltage outgoing route, default for being more than in the output voltage of the main circuit module
During threshold value, automatic addition load.
Alternatively, the control module includes：Comparison circuit, for the output current and predetermined threshold value according to sampling, production
Raw comparative result；Control circuit, for according to the comparative result, adjusting the output power of the main circuit module.
Alternatively, the main circuit module includes：EMC circuits, the input terminal of the EMC circuits are used for external power supply；It is whole
Current circuit, the input terminal of the rectification circuit are connected with the output terminal of the EMC circuits；Pfc circuit, the pfc circuit it is defeated
Enter end to be connected with the output terminal of the rectification circuit；Resonance circuit, the input terminal of the resonance circuit are defeated with the pfc circuit
Outlet connects, and the output terminal of the resonance circuit is used for output voltage electric current.
In second aspect, the embodiment of the present invention provides a kind of adapter, and the adapter includes the power circuit of any one.
In the power circuit that each embodiment of the present invention provides, the output electricity of current mirror module sampling main circuit module
Stream, control module adjusts the output power of main circuit module according to the output current of sampling, so that power circuit can be operated in
Under the power limitation pattern of safety requirement or it is expected under working status.When being worked due to current mirror module, it is without external electrical
The power supply in source, and it can adapt to the sampling of high-low voltage, and therefore, which has low in energy consumption, voltage sample scope
The characteristics of wide.
Brief description of the drawings
One or more embodiments are illustrative by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not formed to embodiment, the element for having same reference numbers label in attached drawing are expressed as similar element, remove
Non- have a special statement, and composition does not limit the figure in attached drawing.
Fig. 1 is that the embodiment of the present invention provides a kind of schematic block circuit diagram of power circuit；
Fig. 2 is that the embodiment of the present invention provides a kind of schematic block circuit diagram of control module；
Fig. 3 is that another embodiment of the present invention provides a kind of schematic block circuit diagram of power circuit；
Fig. 4 is that still another embodiment of the present invention provides a kind of schematic block circuit diagram of power circuit；
Fig. 5 is that still another embodiment of the present invention provides a kind of schematic block circuit diagram of power circuit；
Fig. 6 is that still another embodiment of the present invention provides a kind of schematic block circuit diagram of power circuit；
Fig. 7 is that still another embodiment of the present invention provides a kind of schematic block circuit diagram of power circuit；
Fig. 8 is that still another embodiment of the present invention provides a kind of schematic block circuit diagram of power circuit；
Fig. 9 is that the embodiment of the present invention provides a kind of schematic block circuit diagram of main circuit module；
Figure 10 is EMC circuits, rectification circuit, the electricity of pfc circuit in a kind of main circuit module of offer of the embodiment of the present invention
Line structure schematic diagram；
Figure 11 is a kind of electrical block diagram for the resonance circuit that the embodiment of the present invention is provided in main circuit module；
Figure 12 is that the embodiment of the present invention provides a kind of part circuit structure schematic diagram of control module；
Figure 13 is that the embodiment of the present invention provides a kind of another part electrical block diagram of control module；
Figure 14 is that the embodiment of the present invention provides a kind of electrical block diagram of comparison circuit；
Figure 15 is that the embodiment of the present invention provides a kind of electrical block diagram of current mirror module；
Figure 16 is that the embodiment of the present invention provides a kind of electrical block diagram of current converter circuit；
Figure 17 is that the embodiment of the present invention provides a kind of electrical block diagram of current lens unit；
Figure 18 is that the embodiment of the present invention provides a kind of electrical block diagram of dynamic dummy load module.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Power circuit provided in an embodiment of the present invention can be applied in all kinds of power-supply devices, such as：Adapter, LED electricity
Source etc..
Referring to Fig. 1, Fig. 1, which is the embodiment of the present invention, provides a kind of schematic block circuit diagram of power circuit.As shown in Figure 1,
Power circuit 100 includes：Main circuit module 11, current mirror module 12 and control module 13.
The input terminal of current mirror module 12 is connected with the output terminal of main circuit module 11, control module 13 and current mirror module
12 output terminal connection.
Main circuit module 11 be used in response to external power supply input, by external power supply be converted into desired output voltage or
Output current, it can be that single channel exports, and can also be doubleway output, more can be multiple-channel output.
Current mirror module 12 is used for the output current for sampling main circuit module 11, and control module 13 is electric according to the output of sampling
The output power of stream adjustment main circuit module 11.For example：When the output current of main circuit module 11 is more than predetermined current threshold
During value, control module 13 reduces the output current of main circuit module 11 according to the output current of sampling so that main circuit module 11
Output current maintain in the range of expectation electric current value.Alternatively, when the output current of main circuit module 11 is less than predetermined current threshold
During value, control module 13 maintains the current working status of main circuit module 11.
In certain embodiments, for control module 13 when adjusting main circuit module 11, it can be directly according to sampled result
Adjustment, can also make to adjust again after relatively handling in advance according to sampled result.Such as：As shown in Fig. 2, control module 13 includes：
Comparison circuit 131 and control circuit 132.
Comparison circuit 131 is used for output current and predetermined threshold value according to sampling, produces comparative result.User can basis
Product design is the self-defined predetermined threshold value of comparison circuit 131, such as：The predetermined threshold value is 2.5 volts.Control circuit 132 is used for
According to comparative result, the output power of adjustment main circuit module 11.
To sum up, when being worked due to current mirror module 12, its power supply without external power supply, and it can adapt to height electricity
The sampling of pressure, therefore, the power circuit 100 have the characteristics that low in energy consumption, voltage sample scope is wide, simple in structure, cost is low.
As shown in figure 3, main circuit module 11 configures two-way positive voltage outgoing route and both shared ground terminals all the way are returned
Road path, the input terminal of current mirror module 12 are connected on two-way positive voltage outgoing route.Since power circuit 100 is defeated for two-way
Go out, in order to preferably sample the corresponding output current in each road, the input terminal of current mirror module 12 can be connected to two-way positive voltage
On outgoing route, to sample the corresponding output current in each road respectively, so that subsequent conditioning circuit can accurately distinguish each road working status.
In certain embodiments, main circuit module 11 can export 48 volts of voltages respectively by two-way positive voltage outgoing route
With 12 volts of voltages, such as：Positive voltage outgoing route is used to export 48 volts of voltages all the way, and another way positive voltage outgoing route is used for defeated
Go out 12 volts of voltages.When current mirror module 12 is used to sample the output current for the positive voltage outgoing route for being loaded with 48 volts of voltage,
Current mirror module 12 can complete sampling operation in the case where bearing 48 volts of high terminal voltage.Referring now to conventional art, it is existing on the market
Transport and placing device or chip fail to meet the sampling request in 48 volts of voltage, its acceptable sampled voltage of institute is up to 36
Volt.Therefore, current mirror module 12 provided in this embodiment can be realized carries out sampling operation under high terminal voltage.
In certain embodiments, as shown in figure 4, power circuit 100 further includes dynamic dummy load module 14.Dynamic dummy load
Module 14 includes two input terminals, and an input terminal of dynamic dummy load module 14 is connected to all the way on positive voltage outgoing route,
Another input terminal of dynamic dummy load module 14 is connected on another way positive voltage outgoing route.
Dynamic dummy load module 14 is used for when the output voltage of main circuit module 11 is more than predetermined threshold value, and automatic addition is negative
Carry.Such as：When the output voltage of the outgoing route of positive voltage all the way of main circuit module 11 is more than 48V or 12V, dynamic dummy load
Module 14 is automatically the addition load of power circuit 100, to drag down output voltage, avoids output voltage from floaing height.
Based on highly efficient rate, the accurately consideration of sampled output current, in certain embodiments, as shown in figure 5, electric
Stream mirror module 12 includes at least two current lens units 121, and the input terminal of a current lens unit 121 is connected to positive voltage all the way
Outgoing route, the output terminal of a current lens unit 121 are connected with control module 13.The input of another current lens unit 121
End is connected to another way positive voltage outgoing route, and the output terminal of another current lens unit 121 is connected with control module 13.
One current lens unit 121 can sample the output current for flowing through positive voltage outgoing route all the way, another electric current
Mirror unit 121 can sample the output current for flowing through another way positive voltage outgoing route.Control module 13 can be according to each road just
The result adjustment main circuit module 11 that the corresponding current lens unit 121 in voltage output path samples.
However, in certain embodiments, based on safety standard, for example, in order to also meet LPS under single failure mode
(Limited Power Source) safety standard, as shown in fig. 6, current mirror module 12 includes four current lens units 121, often
Road positive voltage outgoing route is all configured with two current lens units 121.In sampling process, when particular way positive voltage outgoing route
On a current lens unit 121 failure after, another current lens unit 121 on the particular way positive voltage outgoing route replaces
Sampling operation, therefore, it ensures that power circuit 100 can work reliable and stablely.
In certain embodiments, as shown in fig. 7, current lens unit 121 includes：Current converter circuit 1211 and image current
Source circuit 1212.The input terminal of current converter circuit 1211 is connected on corresponding road positive voltage outgoing route, current converter circuit
1211 output terminal is connected with the input terminal of image current source circuit 1212, the output terminal of image current source circuit 1212 and control
Module 13 connects.
Current converter circuit 1211 is used to sampling and changing the output current for flowing through positive voltage outgoing route.Generally, stream
Output current through positive voltage outgoing route is bigger, for the ease of the detection and analysis of subsequent conditioning circuit, current converter circuit
1211 can be converted into the output current for flowing through positive voltage outgoing route in smaller electric current, after the output current and conversion
Electric current establish linear functional relation.
Image current source circuit 1212 is used for the transformed output current of mirror image, exports image current.Control module 13
According to the output power of image current adjustment main circuit module 11.
In certain embodiments, as shown in figure 8, current lens unit 121 further includes negative-feedback circuit 1213, negative-feedback circuit
1213 are connected with image current source circuit 1212.Negative-feedback circuit 1213 is used to adjust image current.Generally, work as external factor
When causing image current 1212 job insecurity of source circuit, such as：Excessive temperature makes the switching tube of image current source circuit 1212
Produce change so that image current raises.Then, negative-feedback circuit 1213 adjusts image current according to the image current after rise
Source circuit 1212 so that image current source circuit 1212 lowers elevated image current, and is down to expectation electric current value, so that
Improve sampling precision.
In above-mentioned each embodiment, those skilled in the art, can be with designed, designed main circuit module according to product demand
11.Such as：In certain embodiments, as shown in figure 9, main circuit module 11 includes：EMC circuits 111, rectification circuit 112, PFC
Circuit 113 and resonance circuit 114.
The input terminal of EMC circuits 111 is used for external power supply, the input terminal of rectification circuit 112 and the output of EMC circuits 111
End connection, the input terminal of pfc circuit 113 are connected with the output terminal of rectification circuit 112, input terminal and the PFC electricity of resonance circuit 114
The output terminal connection on road 113, the output terminal of resonance circuit 114 are used for output voltage electric current.
EMC circuits 111 receive external power supply, and filter out the interference of some noise signals, and export and pass through to next stage circuit
Cross the power supply after EMC processing.
Power supply after rectification circuit 112 handles EMC is converted into DC power supply, and is transmitted to next stage circuit.
Pfc circuit 113 carries out PFC processing to DC power supply, and by the transmitting DC after processing under
Stage circuit.
Resonance circuit 114 is depressured the DC power supply after PFC, to after load output buck
Output voltage.Wherein, resonance circuit 114 can pass through multichannel positive voltage path output multi-channel voltage.
Therefore, main circuit module 11 provided in this embodiment has that Electro Magnetic Compatibility is good, power factor is high, multiple-channel output etc.
Advantage.
In order to elaborate the purpose of the embodiment of the present invention, the work of the detailed power circuits of Figure 10 of the embodiment of the present invention to Figure 18
Make principle, as described below：
Also referring to Figure 10 and Figure 11, which includes：EMC circuits 111, rectification circuit 112, PFC electricity
Road 113 and resonance circuit 114.
Control module 13 can adjust the frequency or duty cycle of resonance circuit 114 according to the output current of sampling, so as to adjust
The output power of whole main circuit module 11.
Figure 12 in the lump and Figure 13 is referred to, which includes：Comparison circuit 131 and control circuit 132, it is more electric
Road 131 is used for output current and predetermined threshold value according to sampling, produces comparative result.Control circuit 132 be used for according to compare knot
Fruit, adjusts the output power of main circuit module 11.Wherein, control circuit 132 includes controller and the peripheral circuit on periphery.
In order to elaborate the operation principle of comparison circuit 131, comparison circuit U9 in Figure 13 is extracted work by the present embodiment
It is introduced for an example.Please refer to Fig.1 the predeterminated voltage of 4, U9 internal presets, one 2.5V.When the voltage at R ends is more than
2.5V, the C feet of triode ON, i.e. U9 are turned on A feet.
Therefore, in the present embodiment, it is by being converted into voltage by the output current of sampling and loading at R ends, so as to reach
To the purpose compared.
5 are please referred to Fig.1, current mirror module 12 includes four current lens units 121, exports the positive voltage output of 48 volts of voltage
Path is configured with two current lens units 121, and the positive voltage outgoing route of 12 volts of voltages of output is configured with two current lens units
121。
In order to elaborate the operation principle of current lens unit, the present embodiment is using a current lens unit in Figure 15 as one
A example is introduced.In order to detect the electric current I1 for flowing through R46, it needs to set current converter circuit 1211 to carry out electric current I1
Linear transformation.6 are please referred to Fig.1, there is the following formula：
R46*I1=R83*I2
Then I2=I1*R46/R83, I2 ≈ I3.
7 are please referred to Fig.1, according to mirror current source operation principle, I3=Ic3+2Ib, Ib very littles, can be neglected, obtain I3 ≈ Ic3
≈ Ic4 ≈ Ic5, i.e. I5 ≈ I3+I4 ≈ 2*I2 ≈ 2* (I1*R46/R83).V0=I5*R50=2* (I1*R46/R83) * R50.
When voltage V0 reaches 2.5V, feedback control loop, starting protection are triggered.Also, it can pass through regulation resistance R46, R83, R50 tune
Voltage V0 is saved, so that control module 13 is according to the output power of voltage V0 adjustment main circuit modules 11.
Referring to Figure 15, corresponding to the current lens unit 121 of 48 volts of voltage, when excessive temperature makes mirror current source electric
The switching tube on road 1212 produces change so that when image current raises, since it is high-end sampling, and the image current institute after rise
The error of generation be it is bigger, therefore, by resistance bridge network R69, R71, R70 and R72 form negative-feedback circuit 1213,
It can be in negative-feedback adjustment U15 switching tube E2 base stage and emitter between pressure drop, so as to reduce base current, and then
Emitter current is reduced, that is, reduces image current.Certainly, it is corresponding can also to be applied to 12 volts of voltages for negative-feedback circuit 1213
Current lens unit 121, does not limit the application range of negative-feedback circuit 1213 herein.
8 are please referred to Fig.1, dynamic dummy load module 14 is made of several resistance and comparator U4.Due to power circuit 100
For doubleway output, carried or carry for idling at light load when exporting all the way, its corresponding output voltage in another way positive voltage path
May be floatd height, so as to influence the working stability of power circuit 100.Such as：When the corresponding output electricity in 48 volts of positive voltage paths
Pressure is floatd height so that during 2.5 volts of predetermined threshold value voltage of the both ends pressure drop of resistance R80 more than comparator U4, then, C-terminal is led with A ends
Logical, therefore, which adds in power circuit 100, as a fictitious load, continues to avoid output voltage
Float height.It can similarly obtain, when 12 volts of the corresponding output voltage in positive voltage path floats high, its operation principle may be referred in above-mentioned
Hold, this will not be repeated here.It can similarly obtain, which can not only adapt to two output voltage, it can also be fitted
Output voltage more than Ying Yusan roads or three tunnels.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；At this
Under the thinking of invention, it can also be combined between the technical characteristic in above example or different embodiment, step can be with
Realized with random order, and there are many other changes of different aspect present invention as described above, for simplicity, they do not have
Have and provided in details；Although the present invention is described in detail with reference to the foregoing embodiments, the ordinary skill people of this area
Member should be understood：It can still modify the technical solution described in foregoing embodiments, or to which part skill
Art feature carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from each reality of the application
Apply the scope of a technical solution.
Claims (10)
- A kind of 1. power circuit, it is characterised in that including：Main circuit module；Current mirror module, the input terminal of the current mirror module is connected with the output terminal of the main circuit module, for sampling State the output current of main circuit module；Control module, the control module are connected with the output terminal of the current mirror module, for the output current according to sampling Adjust the output power of the main circuit module.
- 2. power circuit according to claim 1, it is characterised in thatThe main circuit module configuration two-way positive voltage outgoing route and both shared ground terminal loop paths all the way；The input terminal of the current mirror module is connected on the two-way positive voltage outgoing route.
- 3. power circuit according to claim 2, it is characterised in that the current mirror module includes at least two current mirrors Unit；The input terminal of one current lens unit is connected to the positive voltage outgoing route all the way, a current lens unit Output terminal be connected with the control module；The input terminal of another current lens unit is connected to positive voltage outgoing route described in another way, another described electric current The output terminal of mirror unit is connected with the control module.
- 4. power circuit according to claim 3, it is characterised in that the current lens unit includes：Current converter circuit, the output current of the positive voltage outgoing route is flowed through for sampling and changing；Image current source circuit, for the transformed output current of mirror image, exports image current.
- 5. power circuit according to claim 4, it is characterised in that the current lens unit further includes：Negative-feedback circuit, for adjusting the image current.
- 6. power circuit according to claim 2, it is characterised in thatThe positive voltage outgoing route is used to export 48 volts of voltages all the way；Positive voltage outgoing route described in another way is used to export 12 volts of voltages.
- 7. power circuit according to claim 2, it is characterised in that the power circuit further includes：Dynamic dummy load module, it includes two input terminals, and an input terminal of the dynamic dummy load module is connected to all the way On the positive voltage outgoing route, it is defeated that another input terminal of the dynamic dummy load module is connected to positive voltage described in another way On outbound path, for when the output voltage of the main circuit module is more than predetermined threshold value, automatic addition to load.
- 8. power circuit according to claim 1, it is characterised in that the control module includes：Comparison circuit, for the output current and predetermined threshold value according to sampling, produces comparative result；Control circuit, for according to the comparative result, adjusting the output power of the main circuit module.
- 9. according to claim 1 to 8 any one of them power circuit, it is characterised in that the main circuit module includes：EMC circuits, the input terminal of the EMC circuits are used for external power supply；Rectification circuit, the input terminal of the rectification circuit are connected with the output terminal of the EMC circuits；Pfc circuit, the input terminal of the pfc circuit are connected with the output terminal of the rectification circuit；Resonance circuit, the input terminal of the resonance circuit are connected with the output terminal of the pfc circuit, the output of the resonance circuit End is used for output voltage electric current.
- 10. a kind of adapter, it is characterised in that include the power circuit of any one of such as claim 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711243569.0A CN107977042A (en) | 2017-11-30 | 2017-11-30 | A kind of power circuit and adapter |
| PCT/CN2017/118929 WO2019104808A1 (en) | 2017-11-30 | 2017-12-27 | Power supply circuit and adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711243569.0A CN107977042A (en) | 2017-11-30 | 2017-11-30 | A kind of power circuit and adapter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107977042A true CN107977042A (en) | 2018-05-01 |
Family
ID=62008852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711243569.0A Pending CN107977042A (en) | 2017-11-30 | 2017-11-30 | A kind of power circuit and adapter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107977042A (en) |
| WO (1) | WO2019104808A1 (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5554957A (en) * | 1993-12-17 | 1996-09-10 | Imp, Inc. | Programmable function current mode signal module |
| CN1494208A (en) * | 2002-11-01 | 2004-05-05 | 三合微科股份有限公司 | Low working voltage definite current circuit |
| JP2007019363A (en) * | 2005-07-11 | 2007-01-25 | Seiko Epson Corp | Semiconductor integrated circuit |
| CN101025638A (en) * | 2007-03-20 | 2007-08-29 | 北京中星微电子有限公司 | Device and method for compensating MOS device grid leakage current |
| CN101404846A (en) * | 2008-11-17 | 2009-04-08 | 南京源之峰科技有限公司 | Real-time compensation apparatus for input voltage fluctuation in power LED driving system |
| CN101562323A (en) * | 2008-12-30 | 2009-10-21 | 天津南大强芯半导体芯片设计有限公司 | Short-circuit protection circuit |
| CN103327677A (en) * | 2012-03-23 | 2013-09-25 | 大连阿尔法模拟技术股份有限公司 | Constant current controlling method of LED drive circuit and drive circuit of constant current controlling method |
| CN105717967A (en) * | 2014-12-03 | 2016-06-29 | 中国电子科技集团公司第十八研究所 | Space power supply controller with static compensation current sampling circuit at power positive terminal |
| CN106708165A (en) * | 2017-03-15 | 2017-05-24 | 深圳慧能泰半导体科技有限公司 | Current source circuit, chip and electronic equipment |
| CN107086769A (en) * | 2017-03-17 | 2017-08-22 | 深圳市中电华星电子技术有限公司 | One kind matches somebody with somebody the low apparent power digital circuit of network source |
| CN207457890U (en) * | 2017-11-30 | 2018-06-05 | 深圳麦格米特电气股份有限公司 | A kind of power circuit and adapter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779486A (en) * | 2012-08-03 | 2012-11-14 | 福建捷联电子有限公司 | LED (Light-Emitting Diode) driving circuit capable of regulating current balance by negative voltage |
| CN103095127A (en) * | 2013-01-22 | 2013-05-08 | 上海艾为电子技术有限公司 | Charge pump circuit and electronic equipment |
| CN106602876A (en) * | 2017-01-20 | 2017-04-26 | 北京集创北方科技股份有限公司 | Current detection circuit and power conversion device |
-
2017
- 2017-11-30 CN CN201711243569.0A patent/CN107977042A/en active Pending
- 2017-12-27 WO PCT/CN2017/118929 patent/WO2019104808A1/en active Application Filing
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5554957A (en) * | 1993-12-17 | 1996-09-10 | Imp, Inc. | Programmable function current mode signal module |
| CN1494208A (en) * | 2002-11-01 | 2004-05-05 | 三合微科股份有限公司 | Low working voltage definite current circuit |
| JP2007019363A (en) * | 2005-07-11 | 2007-01-25 | Seiko Epson Corp | Semiconductor integrated circuit |
| CN101025638A (en) * | 2007-03-20 | 2007-08-29 | 北京中星微电子有限公司 | Device and method for compensating MOS device grid leakage current |
| CN101404846A (en) * | 2008-11-17 | 2009-04-08 | 南京源之峰科技有限公司 | Real-time compensation apparatus for input voltage fluctuation in power LED driving system |
| CN101562323A (en) * | 2008-12-30 | 2009-10-21 | 天津南大强芯半导体芯片设计有限公司 | Short-circuit protection circuit |
| CN103327677A (en) * | 2012-03-23 | 2013-09-25 | 大连阿尔法模拟技术股份有限公司 | Constant current controlling method of LED drive circuit and drive circuit of constant current controlling method |
| CN105717967A (en) * | 2014-12-03 | 2016-06-29 | 中国电子科技集团公司第十八研究所 | Space power supply controller with static compensation current sampling circuit at power positive terminal |
| CN106708165A (en) * | 2017-03-15 | 2017-05-24 | 深圳慧能泰半导体科技有限公司 | Current source circuit, chip and electronic equipment |
| CN107086769A (en) * | 2017-03-17 | 2017-08-22 | 深圳市中电华星电子技术有限公司 | One kind matches somebody with somebody the low apparent power digital circuit of network source |
| CN207457890U (en) * | 2017-11-30 | 2018-06-05 | 深圳麦格米特电气股份有限公司 | A kind of power circuit and adapter |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019104808A1 (en) | 2019-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110178283A (en) | Charging equipment, wireless charging device, wireless charging method and system | |
| CN106851927B (en) | A kind of multichannel light modulation toning LED drive circuit of speech recognition | |
| CN205040065U (en) | Adjustable output current's constant voltage constant -current drive circuit | |
| US9652009B2 (en) | Current regulation circuit, power over Ethernet system, and method | |
| CN105281561A (en) | Method for processing merging and current sharing problem of high-power high-frequency power supply | |
| CN207457890U (en) | A kind of power circuit and adapter | |
| CN104378872A (en) | Light emitting diode system and voltage conversion device | |
| CN107645803B (en) | A kind of omnipotent LED drive control device | |
| CN105307305B (en) | A kind of LED power control device and television set | |
| CN105305826A (en) | Multi-output switching power supply circuit | |
| CN109327141A (en) | A kind of wide-range voltage and High-current output method and power-supply system | |
| CN108845252A (en) | A kind of automobile fuse performance detection device | |
| CN107977042A (en) | A kind of power circuit and adapter | |
| CN102821505A (en) | Load driving circuit and load driving method | |
| CN103516218B (en) | Power supply device | |
| CN104507222B (en) | A kind of stage illumination, lighting regulator control system based on technology of Internet of things | |
| CN107342059B (en) | A kind of current control circuit and control method, backlight module, display device | |
| CN109510486A (en) | Control circuit, chip, system and method | |
| CN204068703U (en) | Multi-output switch power source circuit | |
| CN209072343U (en) | A kind of wide-range voltage and High-current output power-supply system | |
| US11277894B2 (en) | Universal adapter for lighting system for indoor grow application | |
| CN101394700A (en) | Constant current regulating circuit having current sensing loop | |
| CN209608908U (en) | The fast and stable constant source flowing system that double lamp failure diagnosis are automatically switched | |
| CN204118852U (en) | Power transfer device | |
| CN108834263B (en) | Voltage-adjustable dimming control circuit and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |