CN203708110U - Power adapter with resistance to high temperature - Google Patents
Power adapter with resistance to high temperature Download PDFInfo
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- CN203708110U CN203708110U CN201320278996.3U CN201320278996U CN203708110U CN 203708110 U CN203708110 U CN 203708110U CN 201320278996 U CN201320278996 U CN 201320278996U CN 203708110 U CN203708110 U CN 203708110U
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Abstract
The utility model relates to the technical field of power adapters, and especially relates to a power adapter with the resistance to high temperature. The power adapter comprises a primary-side rectification filter circuit, a switch transformer transformation circuit, a PWM (pulse width modulation) control circuit, and a secondary-side rectification filter circuit. The WM control circuit employs a control chip U1 of an LNK625 type to generate a control pulse. The control chip U1 can work at high temperature, and the generated control pulse is high in frequency, thereby enabling a transformer T1 to be capable of working at high temperature normally. Accordingly, the power adapter, compared with the prior art, is resistant to high temperature, and is suitable for a high-temperature environment.
Description
Technical field
The utility model relates to power supply adaptor technical field, and particularly one can resistant to elevated temperatures power supply adaptor.
Background technology
Power supply adaptor is the power supply conversion equipment of small portable electronic device and electronic apparatus, is generally made up of shell, power transformer and rectification circuit, can be divided into and exchange output type and direct current output type by its output type; Can be divided into Direct Plug-In and Table top type by connected mode.Extensively be matched in the equipment such as phone composite aircraft, game machine, language playback device, walkman, notebook computer, cell phone.
But existing power supply adaptor, operating ambient temperature is all below 0-40 degree Celsius or 0-40 degree Celsius.This nominal operation temperature is difficult to meet some the product of specific (special) requirements to temperature, for example LED lamp drives working power, need be placed in light fixture, but due to space limited in light fixture, ambient temperature in light fixture is higher, therefore needs the power supply of the features such as exploitation has high temperature resistant circuit, and volume is little.Also have modular power source as communication power supply, be to be contained in instrument or equipment equally, and be operated under more severe hot environment, cube also less, so also need to have the power supply of high temperature resistant circuit.
Therefore,, for solving weak point of the prior art, provide one to seem particularly important by resistant to elevated temperatures power supply adaptor.
Summary of the invention
The purpose of this utility model is to avoid above-mentioned weak point of the prior art and provides the one can resistant to elevated temperatures power supply adaptor.
The purpose of this utility model is achieved through the following technical solutions:
Provide the one can resistant to elevated temperatures power supply adaptor, comprise primary side current rectifying and wave filtering circuit, switch transformer translation circuit, pwm pulse control circuit and secondary side current rectifying and wave filtering circuit, described primary side current rectifying and wave filtering circuit from civil power power taking and by electric power supply to switch transformer translation circuit, described switch transformer translation circuit after obtaining primary side electric energy that current rectifying and wave filtering circuit supplies regulation voltage is supplied with electric energy to secondary side current rectifying and wave filtering circuit, the backward outer output electric energy of secondary side current rectifying and wave filtering circuit rectifying and wave-filtering, pwm pulse control circuit comprises the control chip U1 of LNK625 model, the voltage of the feedback winding of the transformer T1 of described control chip U1 sense switch transformer translation circuit also regulates the width of the working pulse of transformer accordingly.
Wherein, primary side current rectifying and wave filtering circuit comprises bridge rectifier and filter circuit, described bridge rectifier output connects filter circuit, described filter circuit comprises inductance L 1, capacitor C 1 and capacitor C 2, and the input end of described inductance L 1 is connected with the output of bridge rectifier, and the output of described inductance connects the transformer translation circuit that goes into operation, described capacitor C 1 one end connects the input of inductance, other end ground connection, described capacitor C 2 one end connect the output of inductance L 1, other end ground connection.
Wherein, described switch transformer translation circuit also comprises diode D5, resistance R 4 and capacitor C 3, described diode D5 and resistance R 4 are parallel between primary side rectification filter circuit output end and the negative pole of diode D5, the positive pole of described diode D5 connects pwm pulse control circuit output, described transformer T1 primary coil one end connects primary side rectification filter circuit output end, the other end connects pwm pulse control circuit output, and the secondary coil of described transformer T1 is to secondary side current rectifying and wave filtering circuit output voltage.
Wherein, the transformer T1 of described switch transformer translation circuit is EE16 type transformer.
The beneficial effects of the utility model: the utility model provides the one can high temperature resistant power supply adaptor, this power supply adaptor comprises primary side current rectifying and wave filtering circuit, switch transformer translation circuit, pwm pulse control circuit and secondary side current rectifying and wave filtering circuit, wherein primary side current rectifying and wave filtering circuit carries out civil power to power to switch transformer translation circuit after filter rectification, the translation circuit that goes into operation is transformed to required voltage by civil power under the control of pwm pulse control circuit, this voltage is exported to load supplying after secondary side current rectifying and wave filtering circuit rectifying and wave-filtering, pwm pulse control circuit also regulates the width of the working pulse of transformer accordingly according to the voltage of the feedback winding of the transformer T1 of switch transformer translation circuit simultaneously, the voltage of translation circuit energy stable output so that go into operation.At pwm pulse control circuit, it adopts the control chip U1 of LNK625 model to produce control impuls, and because control chip U1 can be operated under hot conditions, produced simultaneously control impuls frequency is high, and transformer T1 still can normally be worked under hot conditions.Therefore, compared with prior art, the utility model can be high temperature resistant, is applicable under hot environment.
Accompanying drawing explanation
The utility model is described in further detail to utilize accompanying drawing, but the embodiment in accompanying drawing does not form any restriction of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to the following drawings other accompanying drawing.
Fig. 1 is the circuit block diagram of a kind of embodiment that can high temperature resistant power supply adaptor of the utility model.
Fig. 2 is the circuit diagram of a kind of embodiment that can high temperature resistant power supply adaptor of the utility model.
Embodiment
With the following Examples the utility model is further described.
A kind of embodiment that can high temperature resistant power supply adaptor of the utility model, as shown in Fig. 1 and Fig. 2, comprise: primary side current rectifying and wave filtering circuit 1, switch transformer translation circuit 2, pwm pulse control circuit 3 and secondary side current rectifying and wave filtering circuit 4, described primary side current rectifying and wave filtering circuit 1 from civil power power taking and by electric power supply to switch transformer translation circuit 2, described switch transformer translation circuit 2 after obtaining primary side current rectifying and wave filtering circuit 1 electric energy that supplies regulation voltage is supplied with electric energy to secondary side current rectifying and wave filtering circuit 4, the backward outer output electric energy of secondary side current rectifying and wave filtering circuit 4 rectifying and wave-filtering, pwm pulse control circuit 3 comprises the control chip U1 of LNK625 model, the voltage of the feedback winding of the transformer T1 of described control chip U1 sense switch transformer translation circuit 2 also regulates the width of the working pulse of transformer accordingly.
The utility model provides the one can high temperature resistant power supply adaptor, this power supply adaptor comprises primary side current rectifying and wave filtering circuit 1, switch transformer translation circuit 2, pwm pulse control circuit 3 and secondary side current rectifying and wave filtering circuit 4, wherein primary side current rectifying and wave filtering circuit 1 carries out civil power to power to switch transformer translation circuit 2 after filter rectification, the translation circuit that goes into operation is transformed to required voltage by civil power under the control of pwm pulse control circuit 3, this voltage is exported to load supplying after secondary side current rectifying and wave filtering circuit 4 rectifying and wave-filterings, pwm pulse control circuit 3 also regulates the width of the working pulse of transformer accordingly according to the voltage of the feedback winding of the transformer T1 of switch transformer translation circuit 2 simultaneously, the voltage of translation circuit energy stable output so that go into operation.At pwm pulse control circuit 3, it adopts the control chip U1 of LNK625 model to produce control impuls, and because control chip U1 can be operated under hot conditions, produced simultaneously control impuls frequency is high, and transformer T1 still can normally be worked under hot conditions.Therefore, compared with prior art, the utility model can be high temperature resistant, is applicable under hot environment.
Primary side current rectifying and wave filtering circuit 1 comprises bridge rectifier and filter circuit, described bridge rectifier output connects filter circuit, described filter circuit comprises inductance L 1, capacitor C 1 and capacitor C 2, the input of described inductance L 1 is connected with the output of bridge rectifier, the output of described inductance connects the transformer translation circuit that goes into operation, and described capacitor C 1 one end connects the input of inductance, other end ground connection, described capacitor C 2 one end connect the output of inductance L 1, other end ground connection.Wherein bridge rectifier adopts 1A/800V bridge heap BD8S, and capacitor C 1 and capacitor C 2 are 6.8UF/400V electrochemical capacitor, and inductance L 1 is 1MH inductance.Thereby the alternating current of visible civil power input is converted into level and smooth direct voltage, for switch transformer translation circuit 2 is powered.
Described switch transformer translation circuit 2 also comprises diode D5, resistance R 4 and capacitor C 3, described diode D5 and resistance R 4 are parallel between primary side current rectifying and wave filtering circuit 1 output and the negative pole of diode D5, the positive pole of described diode D5 connects pwm pulse control circuit 3 outputs, described transformer T1 primary coil one end connects primary side current rectifying and wave filtering circuit 1 output, the other end connects pwm pulse control circuit 3 outputs, and the secondary coil of described transformer T1 is to secondary side current rectifying and wave filtering circuit 4 output voltages.Wherein transformer T1 is EE16 transformer, and diode D5 is FR107 type diode, and resistance R 4 is 200K resistance, and capacitor C 3 is 222/630V negative peak Absorption Capacitance.Switch transformer translation circuit 2 is accepted the energy that primary side current rectifying and wave filtering circuit 1 is supplied with, its transformer T1 is subject to the control of pwm pulse control circuit 3, and pwm pulse control circuit 3 always works in conducting and the cut-off state of a fast frequency when normal, thereby makes transformer T1 follow all the time the state that it is operated in an energy storage and releases energy.
Secondary side current rectifying and wave filtering circuit 4 mainly comprises diode D3, capacitor C 7, capacitor C 8 and resistance R 8.Wherein diode D3 is SR2100 2A/100V diode, and capacitor C 7 is 220uF/16V electrochemical capacitor, and capacitor C 8 is 100uF/16V electrochemical capacitor, and resistance R 8 is 3.9K resistance.The effect of secondary side current rectifying and wave filtering circuit 4 is that the voltage that the transformer secondary output of switch transformer translation circuit 2 is sensed becomes the desired level and smooth stable DC direct voltage of charging device.
Pwm pulse control circuit 3 also comprises diode D2, resistance R 6, capacitor C 5, capacitor C 4, resistance R 2, resistance R 3 and resistance R 5.Diode D2 is FR107 diode, and resistance R 6 is 10R resistance, and resistance R 5 is 2K resistance, and capacitor C 5 is 10UF/50V electrochemical capacitor.Capacitor C 4 is 105/50V patch capacitor.Resistance R 2 and R3 are the voltage detecting resistance of former limit feedback, R2, and R3 resistance is respectively 6.8K/2.2K.Pwm pulse control circuit 3 is by the variation of the feedback winding T1-B output voltage electric current of detection transformer T1, regulate built-in switch pipe work pulse duration in control chip U1 with this, and then control transformer T1 makes defeated transformer T1 go out to remain stable electric current and voltage output.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not restriction to the utility model protection range; although the utility model has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the technical solution of the utility model, and not depart from essence and the scope of technical solutions of the utility model.
Claims (4)
- One kind can resistant to elevated temperatures power supply adaptor, it is characterized in that: comprise primary side current rectifying and wave filtering circuit, switch transformer translation circuit, pwm pulse control circuit and secondary side current rectifying and wave filtering circuit, described primary side current rectifying and wave filtering circuit from civil power power taking and by electric power supply to switch transformer translation circuit, described switch transformer translation circuit after obtaining primary side electric energy that current rectifying and wave filtering circuit supplies regulation voltage is supplied with electric energy to secondary side current rectifying and wave filtering circuit, the backward outer output electric energy of secondary side current rectifying and wave filtering circuit rectifying and wave-filtering, pwm pulse control circuit comprises the control chip U1 of LNK625 model, the voltage of the feedback winding of the transformer T1 of described control chip U1 sense switch transformer translation circuit also regulates the width of the working pulse of transformer accordingly.
- 2. one as claimed in claim 1 can resistant to elevated temperatures power supply adaptor, it is characterized in that: primary side current rectifying and wave filtering circuit comprises bridge rectifier and filter circuit, described bridge rectifier output connects filter circuit, described filter circuit comprises inductance L 1, capacitor C 1 and capacitor C 2, the input end of described inductance L 1 is connected with the output of bridge rectifier, the output of described inductance connects the transformer translation circuit that goes into operation, described capacitor C 1 one end connects the input of inductance, other end ground connection, described capacitor C 2 one end connect the output of inductance L 1, other end ground connection.
- 3. one as claimed in claim 1 can resistant to elevated temperatures power supply adaptor, it is characterized in that: described switch transformer translation circuit also comprises diode D5, resistance R 4 and capacitor C 3, described diode D5 and resistance R 4 are parallel between primary side rectification filter circuit output end and the negative pole of diode D5, the positive pole of described diode D5 connects pwm pulse control circuit output, described transformer T1 primary coil one end connects primary side rectification filter circuit output end, the other end connects pwm pulse control circuit output, the secondary coil of described transformer T1 is to secondary side current rectifying and wave filtering circuit output voltage.
- 4. one can resistant to elevated temperatures power supply adaptor as claimed in claim 1, it is characterized in that: the transformer T1 of described switch transformer translation circuit is EE16 type transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320278996.3U CN203708110U (en) | 2013-05-21 | 2013-05-21 | Power adapter with resistance to high temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320278996.3U CN203708110U (en) | 2013-05-21 | 2013-05-21 | Power adapter with resistance to high temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203708110U true CN203708110U (en) | 2014-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320278996.3U Expired - Fee Related CN203708110U (en) | 2013-05-21 | 2013-05-21 | Power adapter with resistance to high temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203708110U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048834A (en) * | 2015-08-28 | 2015-11-11 | 张新安 | Power adapter with low cost and high performance |
-
2013
- 2013-05-21 CN CN201320278996.3U patent/CN203708110U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048834A (en) * | 2015-08-28 | 2015-11-11 | 张新安 | Power adapter with low cost and high performance |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20210521 |