CN205960755U - Power adapter circuit who possesses temperature compensation function - Google Patents
Power adapter circuit who possesses temperature compensation function Download PDFInfo
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- CN205960755U CN205960755U CN201620869377.5U CN201620869377U CN205960755U CN 205960755 U CN205960755 U CN 205960755U CN 201620869377 U CN201620869377 U CN 201620869377U CN 205960755 U CN205960755 U CN 205960755U
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Abstract
The utility model discloses a power adapter circuit who possesses temperature compensation function, including temperature compensation module, rectifier module, power switching module, high -frequency transformer, output rectifier module, output filter module, switching power supply control module and feedback module. The utility model discloses adopt two common mode inductance to make power adaptation AC input voltage in larger scope in the circuit, increase simultaneously temperature compensation module in the circuit, through feedback common mode inductance's temperature, real -time regulator circuit input voltage avoids the circuit component self -heating to influence working state of a circuit, guarantees the stable work of circuit. The utility model relates to a but power adapter circuit who possesses temperature compensation function wide application in power field.
Description
Technical field
This utility model is related to field of power supplies, especially a kind of power adapter circuit possessing temperature compensation function.
Background technology
Power supply adaptor is external power supply again, is that the supply voltage conversion of small portable electronic device and electronic apparatus sets
Standby, typically by shell, transformator, inductance, electric capacity, control the components and parts such as IC, pcb board to form, its operation principle is defeated by exchanging
Enter to be converted to direct current output；Direct Plug-In and Table top type can be divided into by connected mode.It is common in mobile phone, liquid crystal display and notebook
On the small-sized electronic products such as computer, also extensively it is matched in the equipment such as security protection photographic head, Set Top Box, router simultaneously.
Power supply adaptor of the prior art generally according to fixing standard work, for different alternating current input power supplyings or
Same alternating current input power supplying under different electric network states, its circuit job insecurity, easily cause the fluctuation in circuit and damage
Consumption, leads to power supply adaptor inefficiency, a large amount of heating even to burn circuit.
Therefore, wherein cause circuit working state fluctuation, unstable the reason at least include：
1st, the filtration module of power adapter circuit input circuit and alternating current input power supplying mismatch；
2nd, the element self-heating impact circuit working state of power adapter circuit；
3rd, in power adapter circuit, element is subject to ambient temperature effect, leads to circuit job insecurity, causes control circuit
Job insecurity.
Utility model content
In order to solve above-mentioned technical problem, the purpose of this utility model is：There is provided one kind Auto-matching exchange can input electricity
Source, possesses the power adapter circuit of temperature compensation function.
This utility model be employed technical scheme comprise that：A kind of power adapter circuit possessing temperature compensation function, including
There are temperature compensation module, rectification filtering module, power switching modules, high frequency transformer, output rectification module, output filtering mould
Block, Switching Power Supply control module and feedback module, the outfan of described temperature compensation module connects defeated to rectification filtering module
Enter end, the outfan of described rectification filtering module connects one end of tremendously high frequency primary transformer coil, described high frequency transformer
Secondary coil is connected to the input of output filter module by exporting rectification module, the outfan of described output filter module according to
Secondary another by feedback module, Switching Power Supply control module and power switching modules connection tremendously high frequency primary transformer coil
End, the outfan of described rectification filtering module is additionally coupled to the feeder ear of Switching Power Supply control module.
Further, described rectification filtering module includes the first electric capacity, the second electric capacity, the 3rd electric capacity, the first common mode inductance
And rectifier bridge, described first electric capacity is connected to the input of the first common mode inductance, and the outfan of described first common mode inductance connects
To the input of rectifier bridge, the outfan of described rectifier bridge is respectively connecting to one end of high frequency transformer and Switching Power Supply controls mould
The feeder ear of block, one end of described second electric capacity connects to one end of the first electric capacity, and one end of described 3rd electric capacity connects to
The other end of one electric capacity, the other end of described second electric capacity and the other end of the 3rd electric capacity are all grounded.
Further, described rectification filtering module also includes the second common mode inductance, the outfan of described first common mode inductance
It is connected in series by the second common mode inductance with the input of rectifier bridge.
Further, described second common mode inductance is common mode magnetic field inductance coil.
Further, described temperature compensation module includes first resistor, second resistance, the first critesistor and the second temperature-sensitive
It is connected to the input of the first common mode inductance after resistance, described first resistor and second resistance series connection, the one of described second electric capacity
End is connected by the first critesistor with one end of the first electric capacity, and one end of described 3rd electric capacity is led to the other end of the first electric capacity
Cross the second critesistor to connect.
Further, described second critesistor is arranged at the position being close to the first common mode inductance and the second common mode inductance.
Further, described first critesistor is NTC thermistor, and described second critesistor is PTC thermistor.
Further, described feedback module is connected by photoelectrical coupler with Switching Power Supply control module.
Further, described Switching Power Supply control module includes PWM controller, and described power switching modules include N ditch
Road enhancement mode field effect transistor, the input of described PWM controller is connected with the outfan of feedback module, described PWM controller
Feeder ear is linked with the outfan of rectification filtering module, and the control end of described PWM controller connects to N-channel enhancement mode field effect
The grid of pipe, the source ground of described N-channel enhancement mode FET, the drain electrode of described N-channel enhancement mode FET connects
The other end of tremendously high frequency primary transformer coil.
Further, one end of described high frequency transformer secondary coil connects to the input of output rectification module, described height
The other end of frequency power transformer secondary coil connects to lightning protection end；Also include the 4th electric capacity, described high frequency transformer secondary
The other end of coil passes through the 4th capacity earth.
The beneficial effects of the utility model are：Power adaptation exchange in larger scope is made using double common mode inductances in circuit
Input voltage；Increase temperature compensation module in circuit, by feeding back the temperature of common mode inductance, real-time adjustment circuit inputs simultaneously
Voltage, it is to avoid component self-heating impact circuit working state is it is ensured that circuit stability works.
Brief description
Fig. 1 is this utility model circuit structure block diagram；
Fig. 2 is the circuit theory diagrams of this utility model one specific embodiment.
Specific embodiment
Below in conjunction with the accompanying drawings specific embodiment of the present utility model is described further：
With reference to Fig. 1, a kind of power adapter circuit possessing temperature compensation function, include temperature compensation module, rectification filter
Ripple module, power switching modules, high frequency transformer, output rectification module, output filter module, Switching Power Supply control module and anti-
Feedback module, the outfan of described temperature compensation module connects to the input of rectification filtering module, described rectification filtering module
Outfan connects one end of tremendously high frequency primary transformer coil, and the secondary coil of described high frequency transformer passes through to export rectification module
Connect to the input of output filter module, the outfan of described output filter module passes sequentially through feedback module, Switching Power Supply
Control module and the other end of power switching modules connection tremendously high frequency primary transformer coil, the output of described rectification filtering module
End is additionally coupled to the feeder ear of Switching Power Supply control module.
With reference to circuit theory diagrams Fig. 2 of this utility model one specific embodiment, it is further used as preferred embodiment, institute
State rectification filtering module and include the first electric capacity CX1, the second electric capacity Y1, the 3rd electric capacity Y2, the first common mode inductance LF1 and rectification
Bridge, described first electric capacity CX1 is connected to the input of the first common mode inductance, and the outfan of described first common mode inductance LF1 connects
To the input of rectifier bridge, the outfan of described rectifier bridge is respectively connecting to one end of high frequency transformer and Switching Power Supply controls mould
The feeder ear of block, one end of described second electric capacity Y1 connects to one end of the first electric capacity CX1, and one end of described 3rd electric capacity Y2 is even
It is connected to the other end of the first electric capacity CX1, the other end of described second electric capacity Y1 is all grounded with the other end of the 3rd electric capacity Y2.
The effect of described first common mode inductance LF1 is EMI filtering, and common mode inductance is substantially a bidirectional filter：One
Aspect will filter suppression common mode electromagnetic interference on holding wire, and on the other hand suppression itself does not send out electromagnetic interference again, it is to avoid shadow
Ring the normal work of other electronic equipments under same electromagnetic environment.
Emerging in multitude and widely available however as electronic equipment, computer and household electrical appliance, electric network noise disturbs day
Benefit is serious and forms a kind of public hazards, particularly transient noise interference, and its rate of climb is fast, the persistent period is short, voltage amplitude amplitude high
(several hectovolts are to several kilovolts), randomness are strong, are also easy to produce severe jamming to microcomputer and digital circuit.Therefore, it is further used as preferably
Embodiment, described rectification filtering module also includes the second common mode inductance LF2, the output of described first common mode inductance LF1
End is connected in series by the second common mode inductance LF2 with the input of rectifier bridge.
It is further used as preferred embodiment, described second common mode inductance is common mode magnetic field inductance coil.
For the double common mode inductance structures in above-described embodiment, have an advantage in that the stability of circuit, but due to using double
Common mode inductance makes number of elements increase, and impedance increases, and therefore corresponding radiating also can increase, thus causing temperature change impact electricity
Road normal work.Therefore, be further used as preferred embodiment, described temperature compensation module include first resistor R19,
After two resistance R20, the first critesistor NTC and the second critesistor PTC, described first resistor R19 and the series connection of second resistance R20
It is connected to the input of the first common mode inductance LF1, one end of described second electric capacity Y1 passes through first with one end of the first electric capacity CX1
Critesistor NTC connects, and the second critesistor PTC is passed through with the other end of the first electric capacity CX1 in one end of described 3rd electric capacity Y2
Connect.
It is further used as preferred embodiment, described second critesistor is arranged at is close to the first common mode inductance and second
The position of common mode inductance.
It is further used as preferred embodiment, described first critesistor is NTC thermistor, described second temperature-sensitive electricity
Hinder for PTC thermistor.
Described first critesistor is NTC thermistor, and when circuit incoming transport power supply, electric current will increase moment, and
The characteristic of NTC thermistor is that during low temperature, resistance value is high, therefore can avoid current surge, subsequently in circuit continuous firing room,
NTC thermistor temperature raises, and no longer produces inhibitory action to the electric current in circuit；Described second critesistor is PTC temperature-sensitive
Resistance, the characteristic of PTC thermistor is that during low temperature, resistance value is low, resistance and temperature positive correlation, and described second critesistor PTC
It is arranged at the position being close to the first common mode inductance LF1 and the second common mode inductance LF2, therefore when double common mode inductance heat production increase,
PTC thermistor temperature will increase, thus resistance increases, therefore first resistor R19, the partial pressure of second resistance R20 reduce,
The appropriate reduction of circuit input voltage makes heating reduce.
It is further used as preferred embodiment, described feedback module passes through photoelectrical coupler with Switching Power Supply control module
Connect.
It is further used as preferred embodiment, described Switching Power Supply control module includes PWM controller, described power
Switch module includes N-channel enhancement mode FET, and the input of described PWM controller is connected with the outfan of feedback module
Connect, the feeder ear of described PWM controller is linked with the outfan of rectification filtering module, the control end of described PWM controller connects
To the grid of N-channel enhancement mode FET, the source ground of described N-channel enhancement mode FET, described N-channel enhancement mode
The drain electrode of field effect transistor connects the other end of tremendously high frequency primary transformer coil.
It is further used as preferred embodiment, one end of described high frequency transformer secondary coil connects to output rectification mould
The input of block, the other end of described high frequency transformer secondary coil connects to lightning protection end；Also include the 4th electric capacity, institute
The other end stating high frequency transformer secondary coil passes through the 4th capacity earth.
It is more than that preferable enforcement of the present utility model is illustrated, but this utility model is created and is not limited to institute
State embodiment, those of ordinary skill in the art can also make without prejudice on the premise of this utility model spirit a variety of etc.
With converting or replacing, these equivalent deformation or replacement are all contained in the application claim limited range.
Claims (10)
1. a kind of power adapter circuit possessing temperature compensation function it is characterised in that：Include temperature compensation module, rectification filter
Ripple module, power switching modules, high frequency transformer, output rectification module, output filter module, Switching Power Supply control module and anti-
Feedback module, the outfan of described temperature compensation module connects to the input of rectification filtering module, described rectification filtering module
Outfan connects one end of tremendously high frequency primary transformer coil, and the secondary coil of described high frequency transformer passes through to export rectification module
Connect to the input of output filter module, the outfan of described output filter module passes sequentially through feedback module, Switching Power Supply
Control module and the other end of power switching modules connection tremendously high frequency primary transformer coil, the output of described rectification filtering module
End is additionally coupled to the feeder ear of Switching Power Supply control module.
2. a kind of power adapter circuit possessing temperature compensation function according to claim 1 it is characterised in that：Described whole
Stream filtration module includes the first electric capacity, the second electric capacity, the 3rd electric capacity, the first common mode inductance and rectifier bridge, described first electric capacity
It is connected to the input of the first common mode inductance, the outfan of described first common mode inductance connects to the input of rectifier bridge, described
The outfan of rectifier bridge is respectively connecting to one end of high frequency transformer and the feeder ear of Switching Power Supply control module, described second electricity
The one end holding connects to one end of the first electric capacity, and one end of described 3rd electric capacity connects to the other end of the first electric capacity, and described the
The other end of two electric capacity is all grounded with the other end of the 3rd electric capacity.
3. a kind of input voltage and input current Auto-matching according to claim 2 power adapter circuit it is characterised in that：Institute
State rectification filtering module and also include the second common mode inductance, the outfan of described first common mode inductance is led to the input of rectifier bridge
Cross the second common mode inductance to be connected in series.
4. a kind of input voltage and input current Auto-matching according to claim 2 power adapter circuit it is characterised in that：Institute
Stating the second common mode inductance is common mode magnetic field inductance coil.
5. a kind of power adapter circuit possessing temperature compensation function according to claim 3 it is characterised in that：Described temperature
Degree compensating module includes first resistor, second resistance, the first critesistor and the second critesistor, described first resistor and the
It is connected to the input of the first common mode inductance, one end of described second electric capacity is passed through with one end of the first electric capacity after two resistant series
First critesistor connects, and described one end of 3rd electric capacity is connected by the second critesistor with the other end of the first electric capacity.
6. in a kind of varying temperature environment according to claim 4 the high speed of response power adapter circuit it is characterised in that：Institute
State the second critesistor and be arranged at the position being close to the first common mode inductance and the second common mode inductance.
7. in a kind of varying temperature environment according to claim 4 the high speed of response power adapter circuit it is characterised in that：Institute
Stating the first critesistor is NTC thermistor, and described second critesistor is PTC thermistor.
8. a kind of power adapter circuit possessing temperature compensation function according to claim 1 it is characterised in that：Described anti-
Feedback module is connected by photoelectrical coupler with Switching Power Supply control module.
9. a kind of power adapter circuit possessing temperature compensation function according to claim 1 it is characterised in that：Described open
Close energy supply control module and include PWM controller, described power switching modules include N-channel enhancement mode FET, described
The input of PWM controller is connected with the outfan of feedback module, the feeder ear of described PWM controller and rectification filtering module
Outfan links, and the control end of described PWM controller connects to the grid of N-channel enhancement mode FET, and described N-channel strengthens
The source ground of type field effect transistor, the drain electrode of described N-channel enhancement mode FET connects tremendously high frequency primary transformer coil
The other end.
10. a kind of power adapter circuit possessing temperature compensation function according to claim 1 it is characterised in that：Described
One end of high frequency transformer secondary coil connect to output rectification module input, described high frequency transformer secondary coil another
One end connects to lightning protection end；Also include the 4th electric capacity, the other end of described high frequency transformer secondary coil passes through the 4th
Capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620869377.5U CN205960755U (en) | 2016-08-11 | 2016-08-11 | Power adapter circuit who possesses temperature compensation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620869377.5U CN205960755U (en) | 2016-08-11 | 2016-08-11 | Power adapter circuit who possesses temperature compensation function |
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| Publication Number | Publication Date |
|---|---|
| CN205960755U true CN205960755U (en) | 2017-02-15 |
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ID=57976172
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620869377.5U Active CN205960755U (en) | 2016-08-11 | 2016-08-11 | Power adapter circuit who possesses temperature compensation function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205960755U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022127885A1 (en) * | 2020-12-18 | 2022-06-23 | 南京泉峰科技有限公司 | Charging system and charger |
-
2016
- 2016-08-11 CN CN201620869377.5U patent/CN205960755U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022127885A1 (en) * | 2020-12-18 | 2022-06-23 | 南京泉峰科技有限公司 | Charging system and charger |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |