CN201503559U - Voltage-drop compensation circuit for power adapter output lines - Google Patents
Voltage-drop compensation circuit for power adapter output lines Download PDFInfo
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- CN201503559U CN201503559U CN 200920237068 CN200920237068U CN201503559U CN 201503559 U CN201503559 U CN 201503559U CN 200920237068 CN200920237068 CN 200920237068 CN 200920237068 U CN200920237068 U CN 200920237068U CN 201503559 U CN201503559 U CN 201503559U
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Abstract
The utility model relates to the technical field of voltage-drop compensation circuits, in particular to a voltage-drop compensation circuit for power adapter output lines. The circuit comprises a rectifier diode D1, a filter capacitor C1, a divider resistance R1, a divider resistance R2, and a voltage compensation unit capable of compensating output voltage, wherein an anode input terminal of the voltage compensation unit is connected with the anode of the rectifier diode D1, a cathode input terminal of the voltage compensation unit is connected with a cathode output terminal of a transformer of a power adapter, a feedback signal output terminal of the voltage compensation unit is connected with a feedback terminal of a control circuit of the power adapter, a reference voltage input terminal of the voltage compensation unit is connected with a connection point between the divider resistance R1 and the divider resistance R2, and a cathode output terminal of the voltage compensation unit is connected with a cathode input terminal of a power adapter output line. The utility model can decrease the diameters of power adapter output lines, thereby reducing the production cost of power adapters.
Description
Technical field:
The utility model relates to the voltage drop compensation circuit technical field, relates in particular to a kind of power supply adaptor output line voltage and falls compensating circuit.
Background technology:
Present power supply adaptor output line is generally all longer, when power supply adaptor is output as low-voltage and high-current, on the power supply adaptor output line, all certain voltage drop can be arranged, in order to reach the setting range of rated output voltage, most power supply adaptor is to use the bigger power supply adaptor output line of diameter, to reduce voltage drop, but, the power supply adaptor output line that diameter is bigger, its price is more expensive, causes the production cost of power supply adaptor higher.
The utility model content:
The purpose of this utility model is exactly to provide a kind of power supply adaptor output line voltage that reduces power supply adaptor output line diameter, reduction power supply adaptor production cost to fall compensating circuit at the deficiency of prior art existence.
To achieve these goals, the technical solution adopted in the utility model is:
It comprises commutation diode D1, filter capacitor C1, divider resistance R1, R2, can compensate the voltage compensation unit of output voltage, the positive pole of described commutation diode D1 is connected with the cathode output end of the transformer of power supply adaptor, the negative pole of commutation diode D1 is connected with the positive pole of filter capacitor C1, the positive pole of filter capacitor C1 is connected with the electrode input end of power supply adaptor output line, the negative pole of filter capacitor C1 is connected with the cathode output end of the transformer of power supply adaptor, the end of divider resistance R2 is connected with the cathode output end of the transformer of power supply adaptor, the other end of divider resistance R2 is connected with the end of divider resistance R1, and the other end of divider resistance R1 is connected with the electrode input end of power supply adaptor output line; The electrode input end of described voltage compensation unit is connected with the positive pole of commutation diode D1, the negative input of voltage compensation unit is connected with the cathode output end of the transformer of power supply adaptor, the feedback signal output terminal of voltage compensation unit is connected with the feedback end of the control circuit of power supply adaptor, the reference voltage input terminal of voltage compensation unit is connected with tie point between divider resistance R1, the R2, and the cathode output end of voltage compensation unit is connected with the negative input of power supply adaptor output line.
Described voltage compensation unit is by compensating resistance R3, current-limiting resistance R4, voltage stabilizing chip U1, opto-coupler chip U2 forms, the end of compensating resistance R3 is the negative input of voltage compensation unit, the other end of compensating resistance R3 is connected with the 2nd pin of voltage stabilizing chip U1, the 2nd pin of voltage stabilizing chip U1 is the cathode output end of voltage compensation unit, the 1st pin of voltage stabilizing chip U1 is the reference voltage input terminal of voltage compensation unit, the 3rd pin of voltage stabilizing chip U1 is connected with the 2nd pin of opto-coupler chip U2, the 1st pin of opto-coupler chip U2 is connected with the end of current-limiting resistance R4, the other end of current-limiting resistance R4 is the electrode input end of voltage compensation unit, the 3rd of opto-coupler chip U2,4 pin are the feedback signal output terminal of voltage compensation unit.
The model of described voltage stabilizing chip U1 is TL431.
Described voltage compensation unit is by compensating resistance R3, current-limiting resistance R4, R5, voltage stabilizing diode ZD1, comparer U3, opto-coupler chip U2 forms, the end of compensating resistance R3 is the negative input of voltage compensation unit, the other end of compensating resistance R3 is connected with the positive pole of voltage stabilizing diode ZD1, the cathode output end of the just very voltage compensation unit of voltage stabilizing diode ZD1, the negative pole of voltage stabilizing diode ZD1 is connected with the 2nd pin of comparer U3, comparer U3 the 2nd pin is connected with the end of current-limiting resistance R5, the other end of current-limiting resistance R5 is the electrode input end of voltage compensation unit, the 1st pin of comparer U3 is the reference voltage input terminal of voltage compensation unit, the 4th pin of comparer U3 is connected with the electrode input end of voltage compensation unit, the 5th pin of comparer U3 is connected with the cathode output end of compensating unit, the 3rd pin of comparer U3 is connected with the 2nd pin of opto-coupler chip U2, the 1st pin of opto-coupler chip U2 is connected with the end of current-limiting resistance R4, the other end of current-limiting resistance R4 is connected with the electrode input end of voltage compensation unit, the 3rd of opto-coupler chip U2,4 pin are the feedback signal output terminal of voltage compensation unit.
The utility model beneficial effect is:
The power supply adaptor output line voltage that the utility model provides falls compensating circuit and comprises commutation diode D1, filter capacitor C1, divider resistance R1, R2, can compensate the voltage compensation unit of output voltage, when power supply adaptor uses the big electric current of output LOW voltage, voltage compensation of the present utility model unit can compensate the output voltage of the transformer of power supply adaptor, the voltage drop that reduces the power supply adaptor output line is to the power supply adaptor output voltage influence, even make power supply adaptor use power supply adaptor output line, still can reach the setting range of rated output voltage than minor diameter; Therefore, the utility model can reduce the diameter of power supply adaptor output line, the production cost of reduction power supply adaptor.
Description of drawings:
Fig. 1 is the circuit theory diagrams of the utility model embodiment one;
Fig. 2 is the circuit theory diagrams of the utility model embodiment two.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described, please refer to Fig. 1, be embodiment one of the present utility model, it comprises commutation diode D1, filter capacitor C1, divider resistance R1, R2, can compensate the voltage compensation unit 1 of output voltage, the positive pole of described commutation diode D1 is connected with the cathode output end of the transformer of power supply adaptor 2, the negative pole of commutation diode D1 is connected with the positive pole of filter capacitor C1, the positive pole of filter capacitor C1 is connected with the electrode input end (V0+) of power supply adaptor output line, the negative pole of filter capacitor C1 is connected with the cathode output end of the transformer of power supply adaptor, the end of divider resistance R2 is connected with the cathode output end of the transformer of power supply adaptor, the other end of divider resistance R2 is connected with the end of divider resistance R1, and the other end of divider resistance R1 is connected with the electrode input end of power supply adaptor output line; The electrode input end (IN+) of described voltage compensation unit 1 is connected with the positive pole of commutation diode D1, the negative input of voltage compensation unit 1 (IN-) is connected with the cathode output end of the transformer 2 of power supply adaptor, the feedback signal output terminal (FEEDBACK) of voltage compensation unit 1 is connected with the feedback end of the control circuit of power supply adaptor, the reference voltage input terminal of voltage compensation unit 1 (R_IN) is connected with tie point between divider resistance R1, the R2, and the cathode output end of voltage compensation unit 1 (OUT-) is connected with the negative input of power supply adaptor output line.
The voltage compensation unit 1 of present embodiment is by compensating resistance R3, current-limiting resistance R4, voltage stabilizing chip U1, opto-coupler chip U2 forms, the end of compensating resistance R3 is the negative input of voltage compensation unit 1, the other end of compensating resistance R3 is connected with the 2nd pin of voltage stabilizing chip U1, the 2nd pin of voltage stabilizing chip U1 is the cathode output end of voltage compensation unit 1, the 1st pin of voltage stabilizing chip U1 is the reference voltage input terminal of voltage compensation unit 1, the 3rd pin of voltage stabilizing chip U1 is connected with the 2nd pin of opto-coupler chip U2, the 1st pin of opto-coupler chip U2 is connected with the end of current-limiting resistance R4, the other end of current-limiting resistance R4 is the electrode input end of voltage compensation unit 1, the 3rd of opto-coupler chip U2,4 pin are the feedback signal output terminal of voltage compensation unit 1; More particularly, the model of described voltage stabilizing chip U1 is TL431.Its principle of work is: when power supply adaptor is zero load, the voltage at compensating resistance R3 two ends is zero, when power supply adaptor connects loaded work piece, increase along with the electric current that flows through compensating resistance R3, the voltage of the reference voltage input terminal of voltage compensation unit 1 also increases gradually, so, because the rising of input voltage stabilizing chip U1 reference voltage, make the output voltage of voltage stabilizing chip U1 also can rise, thereby make the input voltage of power supply adaptor output line rise, voltage compensation is carried out in voltage drop to the power supply adaptor output line, even make power supply adaptor use the power supply adaptor output line than minor diameter, still can reach the setting range of rated output voltage.
Please refer to Fig. 2, be embodiment two of the present utility model, the difference of it and embodiment one is, described voltage compensation unit 1 is by compensating resistance R3, current-limiting resistance R4, R5, voltage stabilizing diode ZD1, comparer U3, opto-coupler chip U2 forms, the end of compensating resistance R3 is the negative input of voltage compensation unit 1, the other end of compensating resistance R3 is connected with the positive pole of voltage stabilizing diode ZD1, the cathode output end of the just very voltage compensation unit 1 of voltage stabilizing diode ZD1, the negative pole of voltage stabilizing diode ZD1 is connected with the 2nd pin of comparer U3, comparer U3 the 2nd pin is connected with the end of current-limiting resistance R5, the other end of current-limiting resistance R5 is the electrode input end of voltage compensation unit 1, the 1st pin of comparer U3 is the reference voltage input terminal of voltage compensation unit 1, the 4th pin of comparer U3 is connected with the electrode input end of voltage compensation unit 1, the 5th pin of comparer U3 is connected with the cathode output end of compensating unit, the 3rd pin of comparer U3 is connected with the 2nd pin of opto-coupler chip U2, the 1st pin of opto-coupler chip U2 is connected with the end of current-limiting resistance R4, the other end of current-limiting resistance R4 is connected with the electrode input end of voltage compensation unit 1, the 3rd of opto-coupler chip U2,4 pin are the feedback signal output terminal of voltage compensation unit 1; Its principle of work is: when power supply adaptor is zero load, the voltage at compensating resistance R3 two ends is zero, when power supply adaptor connects loaded work piece, increase along with the electric current that flows through compensating resistance R3, the voltage of the reference voltage input terminal of voltage compensation unit 1 also increases gradually, equally, the voltage of the negative pole of voltage stabilizing diode ZD1 also increases gradually, the input voltage that is the 2nd pin of comparer U3 also increases gradually, so, because the rising of the reference voltage of input comparator U3, make the output voltage of comparer U3 also can rise, thereby make the input voltage of power supply adaptor output line rise, voltage compensation is carried out in the voltage drop of power supply adaptor output line, even make power supply adaptor use power supply adaptor output line, still can reach the setting range of rated output voltage than minor diameter.Other structure is identical with embodiment one, therefore repeats no more here.
Certainly, the above only is preferred embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.
Claims (4)
1. compensating circuit falls in a power supply adaptor output line voltage, it is characterized in that: it comprises commutation diode D1, filter capacitor C1, divider resistance R1, R2, can compensate the voltage compensation unit of output voltage, the positive pole of described commutation diode D1 is connected with the cathode output end of the transformer of power supply adaptor, the negative pole of commutation diode D1 is connected with the positive pole of filter capacitor C1, the positive pole of filter capacitor C1 is connected with the electrode input end of power supply adaptor output line, the negative pole of filter capacitor C1 is connected with the cathode output end of the transformer of power supply adaptor, the end of divider resistance R2 is connected with the cathode output end of the transformer of power supply adaptor, the other end of divider resistance R2 is connected with the end of divider resistance R1, and the other end of divider resistance R1 is connected with the electrode input end of power supply adaptor output line; The electrode input end of described voltage compensation unit is connected with the positive pole of commutation diode D1, the negative input of voltage compensation unit is connected with the cathode output end of the transformer of power supply adaptor, the feedback signal output terminal of voltage compensation unit is connected with the feedback end of the control circuit of power supply adaptor, the reference voltage input terminal of voltage compensation unit is connected with tie point between divider resistance R1, the R2, and the cathode output end of voltage compensation unit is connected with the negative input of power supply adaptor output line.
2. compensating circuit falls in power supply adaptor output line voltage according to claim 1, it is characterized in that: described voltage compensation unit is by compensating resistance R3, current-limiting resistance R4, voltage stabilizing chip U1, opto-coupler chip U2 forms, the end of compensating resistance R3 is the negative input of voltage compensation unit, the other end of compensating resistance R3 is connected with the 2nd pin of voltage stabilizing chip U1, the 2nd pin of voltage stabilizing chip U1 is the cathode output end of voltage compensation unit, the 1st pin of voltage stabilizing chip U1 is the reference voltage input terminal of voltage compensation unit, the 3rd pin of voltage stabilizing chip U1 is connected with the 2nd pin of opto-coupler chip U2, the 1st pin of opto-coupler chip U2 is connected with the end of current-limiting resistance R4, the other end of current-limiting resistance R4 is the electrode input end of voltage compensation unit, the 3rd of opto-coupler chip U2,4 pin are the feedback signal output terminal of voltage compensation unit.
3. compensating circuit falls in power supply adaptor output line voltage according to claim 2, it is characterized in that: the model of described voltage stabilizing chip U1 is TL431.
4. compensating circuit falls in power supply adaptor output line voltage according to claim 1, it is characterized in that: described voltage compensation unit is by compensating resistance R3, current-limiting resistance R4, R5, voltage stabilizing diode ZD1, comparer U3, opto-coupler chip U2 forms, the end of compensating resistance R3 is the negative input of voltage compensation unit, the other end of compensating resistance R3 is connected with the positive pole of voltage stabilizing diode ZD1, the cathode output end of the just very voltage compensation unit of voltage stabilizing diode ZD1, the negative pole of voltage stabilizing diode ZD1 is connected with the 2nd pin of comparer U3, comparer U3 the 2nd pin is connected with the end of current-limiting resistance R5, the other end of current-limiting resistance R5 is the electrode input end of voltage compensation unit, the 1st pin of comparer U3 is the reference voltage input terminal of voltage compensation unit, the 4th pin of comparer U3 is connected with the electrode input end of voltage compensation unit, the 5th pin of comparer U3 is connected with the cathode output end of compensating unit, the 3rd pin of comparer U3 is connected with the 2nd pin of opto-coupler chip U2, the 1st pin of opto-coupler chip U2 is connected with the end of current-limiting resistance R4, the other end of current-limiting resistance R4 is connected with the electrode input end of voltage compensation unit, the 3rd of opto-coupler chip U2,4 pin are the feedback signal output terminal of voltage compensation unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920237068 CN201503559U (en) | 2009-09-30 | 2009-09-30 | Voltage-drop compensation circuit for power adapter output lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920237068 CN201503559U (en) | 2009-09-30 | 2009-09-30 | Voltage-drop compensation circuit for power adapter output lines |
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| Publication Number | Publication Date |
|---|---|
| CN201503559U true CN201503559U (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920237068 Expired - Lifetime CN201503559U (en) | 2009-09-30 | 2009-09-30 | Voltage-drop compensation circuit for power adapter output lines |
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| Country | Link |
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| CN (1) | CN201503559U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401494A (en) * | 2013-08-21 | 2013-11-20 | 梁德新 | Motor control circuit |
| CN105373177A (en) * | 2014-08-07 | 2016-03-02 | 济南芯驰能源科技有限公司 | An automatic circuit voltage drop compensating circuit for an aircraft ground static inverter |
| CN106325343A (en) * | 2015-06-18 | 2017-01-11 | 宏碁股份有限公司 | Power supply device with electric wire drop compensation |
| US9712052B2 (en) | 2015-06-08 | 2017-07-18 | Acer Incorporated | Power supply apparatus with cable voltage drop compensation |
-
2009
- 2009-09-30 CN CN 200920237068 patent/CN201503559U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401494A (en) * | 2013-08-21 | 2013-11-20 | 梁德新 | Motor control circuit |
| CN105373177A (en) * | 2014-08-07 | 2016-03-02 | 济南芯驰能源科技有限公司 | An automatic circuit voltage drop compensating circuit for an aircraft ground static inverter |
| US9712052B2 (en) | 2015-06-08 | 2017-07-18 | Acer Incorporated | Power supply apparatus with cable voltage drop compensation |
| CN106325343A (en) * | 2015-06-18 | 2017-01-11 | 宏碁股份有限公司 | Power supply device with electric wire drop compensation |
| CN106325343B (en) * | 2015-06-18 | 2017-11-28 | 宏碁股份有限公司 | Has the power supply device of electric wire voltage-drop compensation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100609 |
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| CX01 | Expiry of patent term |