CN203747679U - Power adapter circuit resistant to high-frequency interference - Google Patents
Power adapter circuit resistant to high-frequency interference Download PDFInfo
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- CN203747679U CN203747679U CN201320873218.9U CN201320873218U CN203747679U CN 203747679 U CN203747679 U CN 203747679U CN 201320873218 U CN201320873218 U CN 201320873218U CN 203747679 U CN203747679 U CN 203747679U
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Abstract
A power adapter circuit resistant to high-frequency interference relates to the technical field of power. The power adapter circuit comprises a mains supply input line resistant to high-frequency interference, an EMI and rectifier/filter circuit, a high-frequency transformer circuit, a PWM pulse control circuit, a secondary-side rectifier and filter circuit and an output voltage regulation control circuit. A Y capacitor CY1 and a Y capacitor CY2 are combined to the mains supply input line resistant to high-frequency interference through the structure of the circuit, and the Y capacitor CY1 and the Y capacitor CY2 are respectively connected between a live wire of a mains supply and the ground and between a neutral wire of the mains supply and the ground. The resistance to interference of high-frequency noise of voice products can be improved, and the quality of call can be improved.
Description
Technical field
The utility model relates to power technique fields, particularly relates to a kind of power adapter circuit of anti-High-frequency Interference.
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.
The power adapter circuit of prior art generally all fills a Y electric capacity, and Y electric capacity is to be connected between the primary and secondary of transformer in circuit, the effect of Y electric capacity is the electromagnetic interference that filtering transformer produces in high-frequency work, so that EMI can easily pass through, but the power supply adaptor of a Y electric capacity of this kind has the interference of high-frequency cacophony for voice products, can affect the quality of call.
Summary of the invention
The purpose of this utility model is to avoid weak point of the prior art and power adapter circuit that a kind of anti-High-frequency Interference is provided, the power adapter circuit of this anti-High-frequency Interference can improve the ability of the interference of the high-frequency cacophony of anti-voice products, improves the quality of call.
The purpose of this utility model is achieved through the following technical solutions:
A kind of power adapter circuit of anti-High-frequency Interference is provided, comprise the civil power incoming line of anti-High-frequency Interference, EMI and current rectifying and wave filtering circuit, high frequency transformer circuit, pwm pulse control circuit, secondary side current rectifying and wave filtering circuit and output controlling circuit of voltage regulation, the output of the civil power incoming line of anti-High-frequency Interference is connected with the input of EMI and current rectifying and wave filtering circuit, the output of EMI and current rectifying and wave filtering circuit is connected with the input of high frequency transformer circuit, high frequency transformer circuit Yi road is connected with pwm control circuit is two-way, another road output of high frequency transformer circuit is connected with the first input end of secondary side current rectifying and wave filtering circuit, the second input of secondary side current rectifying and wave filtering circuit is connected with the first output of output controlling circuit of voltage regulation, the second output of output controlling circuit of voltage regulation is connected with pwm pulse control circuit, the civil power incoming line of anti-High-frequency Interference comprises Y capacitor C Y1 and Y capacitor C Y2, and Y capacitor C Y1 and Y capacitor C Y2 are connected to respectively between the live wire of civil power and ground and between zero line and ground.
Wherein, the civil power incoming line of anti-High-frequency Interference also comprises fuse F1, piezo-resistance MOV1 and thermistor NTC, fuse F1 and thermistor NTC are connected in series on the live wire of civil power, piezo-resistance MOV1 mono-end is connected to the node between fuse F1 and thermistor NTC, and the other end is connected to the zero line of civil power.
Wherein, EMI and current rectifying and wave filtering circuit comprise capacitor C X1, electrochemical capacitor CE1, common mode inductance LF1, resistance R 1, resistance R 2, diode D1 to D4 diode, one end of one end of capacitor C X1 and resistance R 1, 1 pin of common mode inductance LF1 connects, one end of the other end of capacitor C X1 and resistance R 2, 2 pin of common mode inductance LF1 connect, the other end of resistance R 2 is connected with the other end of resistance R 1, 3 pin of common mode inductance LF1 respectively with the positive pole of diode D1, the negative pole of D3 connects, 4 pin of common mode inductance LF1 respectively with the positive pole of diode D2, the negative pole of diode D4 connects, the negative pole of the negative pole of diode D1 and diode D2, the positive pole of electrochemical capacitor CE1 connects, the positive pole of diode D3, the positive pole of diode D4 is all connected rear and ground connection with the negative pole of electrochemical capacitor CE1.
Wherein, high frequency transformer circuit comprises that resistance R 5 is to resistance R 7, capacitor C 1, diode D5 and transformer T1, one end of resistance R 5 is connected with the positive pole of capacitor C E1, one end of resistance R 6, one end of capacitor C 1,2 pin of transformer T1, the other end of resistance R 5 is connected with the other end of resistance R 6, the other end of capacitor C 1, one end of resistance R 7, the other end of resistance R 7 is connected with the negative pole of diode D5, and the positive pole of diode D5 is connected with 4 pin of transformer T1.
Wherein, pwm pulse control circuit comprises diode D6, voltage-stabiliser tube diode ZD1, resistance R 3, resistance R 4, resistance R 8, resistance R 24, resistance R 21, resistance R 12, resistance R 23, resistance R 22, resistance R 10, resistance R 9, resistance R 11, capacitor C E2, capacitor C 6, capacitor C 3, capacitor C 2, the light-receiving device U3B of optocoupler U3, switching tube Q1 and pwm chip U1, one end of resistance R 3 is connected with the positive pole of electrochemical capacitor CE1, and the other end of resistance R 3 is the supply pin VDD with pwm chip U1 by resistance R 4, one end of resistance R 8, one end of resistance R 24, the positive pole of capacitor C E2 connects, the other end of resistance R 8 is connected with the negative pole of diode D6, the positive pole of diode D6 is connected with 5 pin of transformer T1, and the other end of resistance R 24 is connected with the negative pole of voltage stabilizing didoe ZD1, one end of the positive pole of voltage stabilizing didoe ZD1 and resistance R 21, one end of capacitor C 6, the RI pin of pwm chip U1 connects, and the GATE pin of pwm chip U1 is connected with one end of resistance R 12, one end of the other end of resistance R 12 and resistance R 22, the grid of switching tube Q1 connects, and the drain electrode of switching tube Q1 is connected with the positive pole of diode D5, one end of the source electrode of switching tube Q1 and resistance R 23, one end of resistance R 10, one end of resistance R 9, one end of resistance R 11 connects, the SENSE pin of the other end of resistance R 23 and pwm chip U1, one end of capacitor C 2 connects, the FB pin of pwm chip U1 and one end of capacitor C 3, the collector electrode of the light-receiving device U3B of optocoupler connects, 3 pin of transformer T1, the negative pole of capacitor C E2, one end of resistance R 21, one end of capacitor C 6, the grounding leg GND of control chip, the other end of capacitor C 3, the emitter of the light-receiving device U3B of optocoupler, the other end of capacitor C 2, the other end of resistance R 22, the other end of resistance R 10, the other end of resistance R 9, the equal ground connection of the other end of resistance R 11.
Wherein, secondary side current rectifying and wave filtering circuit comprises diode D8, diode D9, , resistance R 13, resistance R 20, capacitor C 4, electrochemical capacitor CE3, electrochemical capacitor CE4 and common mode inductance LF2, the positive pole of diode D8, the positive pole of diode D9, one end of resistance R 13 is all connected with 8 pin of transformer T1, the negative pole of the negative pole of diode D8 and diode D9, one end of capacitor C 4, the positive pole of electrochemical capacitor CE3, one end of resistance R 20, the positive pole of electrochemical capacitor CE4, 1 pin of common mode inductance LF2 connects, the other end of resistance R 13 is connected with the other end of capacitor C 4, 7 pin of transformer T1, the negative pole of capacitor C E3, the other end of resistance R 20, the negative pole of electrochemical capacitor CE4, the equal ground connection of 2 pin of common mode inductance LF2, 3 pin of common mode inductance LF2 add DC output plus terminal V+, 4 pin of common mode inductance LF2 meet DC output negative terminal V-.
Wherein, output controlling circuit of voltage regulation comprises that resistance R 14 is to resistance R 19, the photophore U3A of optocoupler U3, reference voltage stabilizing source U2 and capacitor C 5, the positive pole of one end of resistance R 14 and electrochemical capacitor CE3, one end of resistance R 15, one end of resistance R 16 connects, the other end of resistance R 14 is connected with the positive pole of the photophore U3B of optocoupler U3, the negative pole of the photophore U3B of coupling U3 and the other end of resistance R 15, one end of capacitor C 5, the K end of reference voltage stabilizing source U2 connects, the other end of capacitor C 5 is connected with the other end of resistance R 19, the other end of the other end of resistance R 19 and resistance R 16, one end of resistance R 18, one end of resistance R 17, the R end of reference voltage stabilizing source U2 connects, the other end of resistance R 18, the other end of resistance R 17, the A of reference voltage stabilizing source U2 holds equal ground connection.
The beneficial effects of the utility model: the utility model comprises the civil power incoming line of anti-High-frequency Interference, EMI and current rectifying and wave filtering circuit, high frequency transformer circuit, pwm pulse control circuit, secondary side current rectifying and wave filtering circuit and output controlling circuit of voltage regulation, the civil power incoming line that is combined in anti-High-frequency Interference by the structure of circuit itself comprises Y capacitor C Y1 and Y capacitor C Y2, Y capacitor C Y1 and Y capacitor C Y2 are connected to respectively between the live wire of civil power and ground and between zero line and ground, Y capacitor C Y1 and Y capacitor C Y2 can filter out the High-frequency Interference AC signal in electrical network through L/N line from AC end to exporting, because High-frequency Interference AC signal is not passed through main loop circuit, the inner interference meeting producing of power supply is very little, so power supply is subject to the interference of high frequency to voice products also can be less, can improve the ability of the interference of the high-frequency cacophony of anti-voice products, improve the quality of call.
Brief description of the drawings
Utilize accompanying drawing to be described further utility model, 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 a kind of circuit diagram of power adapter circuit of anti-High-frequency Interference.
In figure, include:
1---the civil power incoming line of anti-High-frequency Interference;
2---EMI and current rectifying and wave filtering circuit;
3---high frequency transformer circuit;
4---pwm pulse control circuit;
5---secondary side current rectifying and wave filtering circuit;
6---output controlling circuit of voltage regulation.
Embodiment
With the following Examples the utility model is further described.
The power adapter circuit of a kind of anti-High-frequency Interference of the present embodiment, as shown in Figure 1, comprise the civil power incoming line 1 of anti-High-frequency Interference, EMI and current rectifying and wave filtering circuit 2, high frequency transformer circuit 3, pwm pulse control circuit 4, secondary side current rectifying and wave filtering circuit 5 and output controlling circuit of voltage regulation 6, the output of the civil power incoming line 1 of anti-High-frequency Interference is connected with the input of EMI and current rectifying and wave filtering circuit 2, the output of EMI and current rectifying and wave filtering circuit 2 is connected with the input of high frequency transformer circuit 3, high frequency transformer circuit 3 Yi roads are connected with pwm control circuit is two-way, another road output of high frequency transformer circuit 3 is connected with the first input end of secondary side current rectifying and wave filtering circuit 5, the second input of secondary side current rectifying and wave filtering circuit 5 is connected with the first output of output controlling circuit of voltage regulation 6, the second output of output controlling circuit of voltage regulation 6 is connected with pwm pulse control circuit 4, the civil power incoming line 1 of anti-High-frequency Interference comprises Y capacitor C Y1 and Y capacitor C Y2, and Y capacitor C Y1 and Y capacitor C Y2 are connected to respectively between the live wire of civil power and ground and between zero line and ground.
Y capacitor C Y1 and Y capacitor C Y2 can filter out the High-frequency Interference AC signal in electrical network through L/N line from AC end to exporting, because High-frequency Interference AC signal is not passed through main loop circuit, the inner interference meeting producing of power supply is very little, thus power supply be subject to the interference of high frequency to voice products also can be less.
Wherein, the civil power incoming line 1 of anti-High-frequency Interference also comprises fuse F1, piezo-resistance MOV1 and thermistor NTC, fuse F1 and thermistor NTC are connected in series on the live wire of civil power, piezo-resistance MOV1 mono-end is connected to the node between fuse F1 and thermistor NTC, and the other end is connected to the zero line of civil power.
Wherein, EMI and current rectifying and wave filtering circuit 2 comprise capacitor C X1, electrochemical capacitor CE1, common mode inductance LF1, resistance R 1, resistance R 2, diode D1 to D4 diode, one end of one end of capacitor C X1 and resistance R 1, 1 pin of common mode inductance LF1 connects, one end of the other end of capacitor C X1 and resistance R 2, 2 pin of common mode inductance LF1 connect, the other end of resistance R 2 is connected with the other end of resistance R 1, 3 pin of common mode inductance LF1 respectively with the positive pole of diode D1, the negative pole of D3 connects, 4 pin of common mode inductance LF1 respectively with the positive pole of diode D2, the negative pole of diode D4 connects, the negative pole of the negative pole of diode D1 and diode D2, the positive pole of electrochemical capacitor CE1 connects, the positive pole of diode D3, the positive pole of diode D4 is all connected rear and ground connection with the negative pole of electrochemical capacitor CE1.
Wherein, high frequency transformer circuit 3 comprises that resistance R 5 is to resistance R 7, capacitor C 1, diode D5 and transformer T1, one end of resistance R 5 is connected with the positive pole of capacitor C E1, one end of resistance R 6, one end of capacitor C 1,2 pin of transformer T1, the other end of resistance R 5 is connected with the other end of resistance R 6, the other end of capacitor C 1, one end of resistance R 7, the other end of resistance R 7 is connected with the negative pole of diode D5, and the positive pole of diode D5 is connected with 4 pin of transformer T1.
Wherein, pwm pulse control circuit 4 comprises diode D6, voltage-stabiliser tube diode ZD1, resistance R 3, resistance R 4, resistance R 8, resistance R 24, resistance R 21, resistance R 12, resistance R 23, resistance R 22, resistance R 10, resistance R 9, resistance R 11, capacitor C E2, capacitor C 6, capacitor C 3, capacitor C 2, the light-receiving device U3B of optocoupler U3, switching tube Q1 and pwm chip U1, one end of resistance R 3 is connected with the positive pole of electrochemical capacitor CE1, and the other end of resistance R 3 is the supply pin VDD with pwm chip U1 by resistance R 4, one end of resistance R 8, one end of resistance R 24, the positive pole of capacitor C E2 connects, the other end of resistance R 8 is connected with the negative pole of diode D6, the positive pole of diode D6 is connected with 5 pin of transformer T1, and the other end of resistance R 24 is connected with the negative pole of voltage stabilizing didoe ZD1, one end of the positive pole of voltage stabilizing didoe ZD1 and resistance R 21, one end of capacitor C 6, the RI pin of pwm chip U1 connects, and the GATE pin of pwm chip U1 is connected with one end of resistance R 12, one end of the other end of resistance R 12 and resistance R 22, the grid of switching tube Q1 connects, and the drain electrode of switching tube Q1 is connected with the positive pole of diode D5, one end of the source electrode of switching tube Q1 and resistance R 23, one end of resistance R 10, one end of resistance R 9, one end of resistance R 11 connects, the SENSE pin of the other end of resistance R 23 and pwm chip U1, one end of capacitor C 2 connects, the FB pin of pwm chip U1 and one end of capacitor C 3, the collector electrode of the light-receiving device U3B of optocoupler connects, 3 pin of transformer T1, the negative pole of capacitor C E2, one end of resistance R 21, one end of capacitor C 6, the grounding leg GND of control chip, the other end of capacitor C 3, the emitter of the light-receiving device U3B of optocoupler, the other end of capacitor C 2, the other end of resistance R 22, the other end of resistance R 10, the other end of resistance R 9, the equal ground connection of the other end of resistance R 11.
Wherein, secondary side current rectifying and wave filtering circuit 5 comprises diode D8, diode D9, , resistance R 13, resistance R 20, capacitor C 4, electrochemical capacitor CE3, electrochemical capacitor CE4 and common mode inductance LF2, the positive pole of diode D8, the positive pole of diode D9, one end of resistance R 13 is all connected with 8 pin of transformer T1, the negative pole of the negative pole of diode D8 and diode D9, one end of capacitor C 4, the positive pole of electrochemical capacitor CE3, one end of resistance R 20, the positive pole of electrochemical capacitor CE4, 1 pin of common mode inductance LF2 connects, the other end of resistance R 13 is connected with the other end of capacitor C 4, 7 pin of transformer T1, the negative pole of capacitor C E3, the other end of resistance R 20, the negative pole of electrochemical capacitor CE4, the equal ground connection of 2 pin of common mode inductance LF2, 3 pin of common mode inductance LF2 add DC output plus terminal V+, 4 pin of common mode inductance LF2 meet DC output negative terminal V-.
Wherein, output controlling circuit of voltage regulation 6 comprises that resistance R 14 is to resistance R 19, the photophore U3A of optocoupler U3, reference voltage stabilizing source U2 and capacitor C 5, the positive pole of one end of resistance R 14 and electrochemical capacitor CE3, one end of resistance R 15, one end of resistance R 16 connects, the other end of resistance R 14 is connected with the positive pole of the photophore U3B of optocoupler U3, the negative pole of the photophore U3B of coupling U3 and the other end of resistance R 15, one end of capacitor C 5, the K end of reference voltage stabilizing source U2 connects, the other end of capacitor C 5 is connected with the other end of resistance R 19, the other end of the other end of resistance R 19 and resistance R 16, one end of resistance R 18, one end of resistance R 17, the R end of reference voltage stabilizing source U2 connects, the other end of resistance R 18, the other end of resistance R 17, the A of reference voltage stabilizing source U2 holds equal ground connection.
The civil power incoming line 1 of the anti-High-frequency Interference of the present embodiment is by the 220V/50HZ alternating voltage of input, through the High-frequency Interference AC signal in Y capacitor C Y1 and Y capacitor C Y2 filtering electrical network, pass through again EMI and current rectifying and wave filtering circuit 2, be filtered into level and smooth direct voltage finally by crossing electrochemical capacitor C1, for the high frequency transformer circuit 3 of rear class provides energy, high frequency transformer circuit 3 is accepted the energy that prime is supplied with, switching tube Q1 is subject to the control of pwm chip U1, when pwm chip U1 work, switching tube Q1 is in conducting and the cut-off state of a high speed, thereby make transformer follow all the time the state that it is operated in an energy storage and releases energy, the secondary induction that the effect of secondary side current rectifying and wave filtering circuit 5 is to make high frequency transformer circuit 3 to voltage become the desired level and smooth stable DC direct voltage of external equipment, pwm pulse control circuit 4 and output controlling circuit of voltage regulation 6 are by the variation of feedback winding and reference voltage stabilizing source U2 and optocoupler U3 detection output voltage electric current, by the working pulse width of pwm chip U1 control switch pipe Q1, make the electric current and voltage of output remain stable.
The present embodiment comprises civil power incoming line 1, EMI and current rectifying and wave filtering circuit 2, high frequency transformer circuit 3, pwm pulse control circuit 4, secondary side current rectifying and wave filtering circuit 5 and the output controlling circuit of voltage regulation 6 of anti-High-frequency Interference, the civil power incoming line 1 that is combined in anti-High-frequency Interference by the structure of circuit itself comprises Y capacitor C Y1 and Y capacitor C Y2, Y capacitor C Y1 and Y capacitor C Y2 are connected to respectively between the live wire of civil power and ground and between zero line and ground, can improve the ability of the interference of the high-frequency cacophony of anti-voice products, improve the quality of call.
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 (7)
1. the power adapter circuit of an anti-High-frequency Interference, it is characterized in that: the civil power incoming line that comprises anti-High-frequency Interference, EMI and current rectifying and wave filtering circuit, high frequency transformer circuit, pwm pulse control circuit, secondary side current rectifying and wave filtering circuit and output controlling circuit of voltage regulation, the output of the civil power incoming line of anti-High-frequency Interference is connected with the input of EMI and current rectifying and wave filtering circuit, the output of EMI and current rectifying and wave filtering circuit is connected with the input of high frequency transformer circuit, high frequency transformer circuit Yi road is connected with pwm control circuit is two-way, another road output of high frequency transformer circuit is connected with the first input end of secondary side current rectifying and wave filtering circuit, the second input of secondary side current rectifying and wave filtering circuit is connected with the first output of output controlling circuit of voltage regulation, the second output of output controlling circuit of voltage regulation is connected with pwm pulse control circuit, the civil power incoming line of anti-High-frequency Interference comprises Y capacitor C Y1 and Y capacitor C Y2, and Y capacitor C Y1 and Y capacitor C Y2 are connected to respectively between the live wire of civil power and ground and between zero line and ground.
2. the power adapter circuit of a kind of anti-High-frequency Interference as claimed in claim 1, it is characterized in that: the civil power incoming line of anti-High-frequency Interference also comprises fuse F1, piezo-resistance MOV1 and thermistor NTC, fuse F1 and thermistor NTC are connected in series on the live wire of civil power, piezo-resistance MOV1 mono-end is connected to the node between fuse F1 and thermistor NTC, and the other end is connected to the zero line of civil power.
3. the power adapter circuit of a kind of anti-High-frequency Interference as claimed in claim 2, it is characterized in that: EMI and current rectifying and wave filtering circuit comprise capacitor C X1, electrochemical capacitor CE1, common mode inductance LF1, resistance R 1, resistance R 2, diode D1 to D4 diode, one end of one end of capacitor C X1 and resistance R 1, 1 pin of common mode inductance LF1 connects, one end of the other end of capacitor C X1 and resistance R 2, 2 pin of common mode inductance LF1 connect, the other end of resistance R 2 is connected with the other end of resistance R 1, 3 pin of common mode inductance LF1 respectively with the positive pole of diode D1, the negative pole of D3 connects, 4 pin of common mode inductance LF1 respectively with the positive pole of diode D2, the negative pole of diode D4 connects, the negative pole of the negative pole of diode D1 and diode D2, the positive pole of electrochemical capacitor CE1 connects, the positive pole of diode D3, the positive pole of diode D4 is all connected rear and ground connection with the negative pole of electrochemical capacitor CE1.
4. the power adapter circuit of a kind of anti-High-frequency Interference as claimed in claim 3, it is characterized in that: high frequency transformer circuit comprises that resistance R 5 is to resistance R 7, capacitor C 1, diode D5 and transformer T1, one end of resistance R 5 is connected with the positive pole of capacitor C E1, one end of resistance R 6, one end of capacitor C 1,2 pin of transformer T1, the other end of resistance R 5 is connected with the other end of resistance R 6, the other end of capacitor C 1, one end of resistance R 7, the other end of resistance R 7 is connected with the negative pole of diode D5, and the positive pole of diode D5 is connected with 4 pin of transformer T1.
5. the power adapter circuit of a kind of anti-High-frequency Interference as claimed in claim 4, is characterized in that: pwm pulse control circuit comprises diode D6, voltage-stabiliser tube diode ZD1, resistance R 3, resistance R 4, resistance R 8, resistance R 24, resistance R 21, resistance R 12, resistance R 23, resistance R 22, resistance R 10, resistance R 9, resistance R 11, capacitor C E2, capacitor C 6, capacitor C 3, capacitor C 2, the light-receiving device U3B of optocoupler U3, switching tube Q1 and pwm chip U1, one end of resistance R 3 is connected with the positive pole of electrochemical capacitor CE1, and the other end of resistance R 3 is the supply pin VDD with pwm chip U1 by resistance R 4, one end of resistance R 8, one end of resistance R 24, the positive pole of capacitor C E2 connects, the other end of resistance R 8 is connected with the negative pole of diode D6, the positive pole of diode D6 is connected with 5 pin of transformer T1, and the other end of resistance R 24 is connected with the negative pole of voltage stabilizing didoe ZD1, one end of the positive pole of voltage stabilizing didoe ZD1 and resistance R 21, one end of capacitor C 6, the RI pin of pwm chip U1 connects, and the GATE pin of pwm chip U1 is connected with one end of resistance R 12, one end of the other end of resistance R 12 and resistance R 22, the grid of switching tube Q1 connects, and the drain electrode of switching tube Q1 is connected with the positive pole of diode D5, one end of the source electrode of switching tube Q1 and resistance R 23, one end of resistance R 10, one end of resistance R 9, one end of resistance R 11 connects, the SENSE pin of the other end of resistance R 23 and pwm chip U1, one end of capacitor C 2 connects, the FB pin of pwm chip U1 and one end of capacitor C 3, the collector electrode of the light-receiving device U3B of optocoupler connects, 3 pin of transformer T1, the negative pole of capacitor C E2, one end of resistance R 21, one end of capacitor C 6, the grounding leg GND of control chip, the other end of capacitor C 3, the emitter of the light-receiving device U3B of optocoupler, the other end of capacitor C 2, the other end of resistance R 22, the other end of resistance R 10, the other end of resistance R 9, the equal ground connection of the other end of resistance R 11.
6. the power adapter circuit of a kind of anti-High-frequency Interference as claimed in claim 5, it is characterized in that: secondary side current rectifying and wave filtering circuit comprises diode D8, diode D9, resistance R 13, resistance R 20, capacitor C 4, electrochemical capacitor CE3, electrochemical capacitor CE4 and common mode inductance LF2, the positive pole of diode D8, the positive pole of diode D9, one end of resistance R 13 is all connected with 8 pin of transformer T1, the negative pole of the negative pole of diode D8 and diode D9, one end of capacitor C 4, the positive pole of electrochemical capacitor CE3, one end of resistance R 20, the positive pole of electrochemical capacitor CE4, 1 pin of common mode inductance LF2 connects, the other end of resistance R 13 is connected with the other end of capacitor C 4, 7 pin of transformer T1, the negative pole of capacitor C E3, the other end of resistance R 20, the negative pole of electrochemical capacitor CE4, the equal ground connection of 2 pin of common mode inductance LF2, 3 pin of common mode inductance LF2 add DC output plus terminal V+, 4 pin of common mode inductance LF2 meet DC output negative terminal V-.
7. the power adapter circuit of a kind of anti-High-frequency Interference as claimed in claim 6, it is characterized in that: output controlling circuit of voltage regulation comprises that resistance R 14 is to resistance R 19, the photophore U3A of optocoupler U3, reference voltage stabilizing source U2 and capacitor C 5, the positive pole of one end of resistance R 14 and electrochemical capacitor CE3, one end of resistance R 15, one end of resistance R 16 connects, the other end of resistance R 14 is connected with the positive pole of the photophore U3B of optocoupler U3, the negative pole of the photophore U3B of coupling U3 and the other end of resistance R 15, one end of capacitor C 5, the K end of reference voltage stabilizing source U2 connects, the other end of capacitor C 5 is connected with the other end of resistance R 19, the other end of the other end of resistance R 19 and resistance R 16, one end of resistance R 18, one end of resistance R 17, the R end of reference voltage stabilizing source U2 connects, the other end of resistance R 18, the other end of resistance R 17, the A of reference voltage stabilizing source U2 holds equal ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320873218.9U CN203747679U (en) | 2013-12-28 | 2013-12-28 | Power adapter circuit resistant to high-frequency interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320873218.9U CN203747679U (en) | 2013-12-28 | 2013-12-28 | Power adapter circuit resistant to high-frequency interference |
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| Publication Number | Publication Date |
|---|---|
| CN203747679U true CN203747679U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320873218.9U Expired - Fee Related CN203747679U (en) | 2013-12-28 | 2013-12-28 | Power adapter circuit resistant to high-frequency interference |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505842A (en) * | 2016-10-19 | 2017-03-15 | 飞亚达（集团）股份有限公司 | Airborne DC source |
| CN107138283A (en) * | 2017-06-14 | 2017-09-08 | 郑州永泰澳新商贸有限公司 | One kind automation ore screening machine |
| CN113765366A (en) * | 2021-09-27 | 2021-12-07 | 深圳市明鑫电源技术有限公司 | Anti-interference circuit and power adapter |
-
2013
- 2013-12-28 CN CN201320873218.9U patent/CN203747679U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505842A (en) * | 2016-10-19 | 2017-03-15 | 飞亚达（集团）股份有限公司 | Airborne DC source |
| CN106505842B (en) * | 2016-10-19 | 2019-09-10 | 飞亚达（集团）股份有限公司 | Airborne DC power supply |
| CN107138283A (en) * | 2017-06-14 | 2017-09-08 | 郑州永泰澳新商贸有限公司 | One kind automation ore screening machine |
| CN113765366A (en) * | 2021-09-27 | 2021-12-07 | 深圳市明鑫电源技术有限公司 | Anti-interference circuit and power adapter |
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Granted publication date: 20140730 Termination date: 20181228 |