CN216490257U - Power adapter circuit and power adapter - Google Patents
Power adapter circuit and power adapter Download PDFInfo
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- CN216490257U CN216490257U CN202122858346.3U CN202122858346U CN216490257U CN 216490257 U CN216490257 U CN 216490257U CN 202122858346 U CN202122858346 U CN 202122858346U CN 216490257 U CN216490257 U CN 216490257U
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Abstract
The application provides a power adapter circuit and a power adapter. The power adapter circuit includes a first adapter circuit and a second adapter circuit. The first adapter circuit comprises a first rectifying and filtering circuit, a first modulation circuit, a first transformer circuit and a voltage stabilizing circuit, wherein the input end of the first rectifying and filtering circuit is used for being connected with the output end of an external alternating current device, and the output end of the voltage stabilizing circuit is used for outputting a first direct current. The second adapter circuit comprises a second modulation circuit, a second transformer and a second rectification filter circuit, the second modulation circuit comprises a power circuit, a modulation chip and a driving circuit, the output end of the first rectification filter circuit is connected with the primary synonym end of the second transformer, the output end of the second rectification filter circuit is used for outputting a second direct current, and the voltage of the second direct current is smaller than that of the first direct current. The power adapter circuit has good output adaptability.
Description
Technical Field
The utility model relates to the field of power adapters, in particular to a power adapter circuit and a power adapter.
Background
The power adapter is a power supply conversion device of electronic appliances, and generally comprises components such as a shell, a transformer, an inductor, a capacitor, an integrated circuit chip, a printed circuit board and the like.
Different electrical appliances have different requirements on input power, the output power of a common power adapter is a rated range value, and only single output direct current is available, so that the power adapter is difficult to adapt to different electrical appliances, and the types of the electrical appliances adapted to the common power adapter are few.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a power adapter circuit and a power adapter for improving output adaptability.
The purpose of the utility model is realized by the following technical scheme:
a power adapter circuit comprising:
the first adapter circuit comprises a first rectifying and filtering circuit, a first modulation circuit, a first transformer circuit and a voltage stabilizing circuit, wherein the input end of the first rectifying and filtering circuit is used for being connected with the output end of an external alternating current device, the output end of the first rectifying and filtering circuit is respectively connected with the input end of the first modulation circuit and the input end of the first transformer circuit, the output end of the first modulation circuit is connected with the input end of the first transformer circuit, the output end of the first transformer circuit is connected with the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit is used for outputting a first direct current;
the second adapter circuit comprises a second modulation circuit, a second transformer and a second rectifying and filtering circuit, the second modulation circuit comprises a power circuit, a modulation chip and a driving circuit, the output end of the first rectifying and filtering circuit is connected with the primary synonym end of the second transformer, the primary coil of the second transformer is adjacent to the auxiliary coil of the power circuit, the output end of the power circuit is connected with the power supply end of the modulation chip, the feedback end of the modulation chip is connected with the input end of the driving circuit, the output end of the driving circuit is connected with the sampling end of the modulation chip, the output end of the modulation chip is connected with the primary synonym input end of the second transformer, the secondary side of the second transformer is connected with the input end of the second rectifying and filtering circuit, and the output end of the second rectifying and filtering circuit is used for outputting a second direct current, and the voltage of the second direct current is less than the voltage of the first direct current.
In one embodiment, the second adapter circuit further includes a first electrolytic capacitor, an anode of the first electrolytic capacitor is connected to the power supply terminal of the modulation chip, and a cathode of the first electrolytic capacitor is grounded.
In one embodiment, the second adapter circuit further includes a first resistor, a second resistor, and a first capacitor, and the current peak sampling terminal of the modulation chip is grounded through the first resistor, the second resistor, and the first capacitor, respectively.
In one embodiment, the second adapter circuit further includes a first feedback resistor and a second feedback resistor, the input terminal of the power circuit is connected to the feedback terminal of the modulation chip through the first feedback resistor, and the feedback terminal of the modulation chip is grounded through the second feedback resistor.
In one embodiment, the second adapter circuit further includes a first rectifying diode, a third resistor, and a second capacitor, the second dotted output terminal of the second transformer is connected to an anode of the first rectifying diode, a cathode of the first rectifying diode is used for outputting the second direct current, an anode of the first rectifying diode is connected to one end of the third resistor, the other end of the third resistor is connected to one end of the second capacitor, and the other end of the second capacitor is connected to a cathode of the first rectifying diode.
In one embodiment, the second adapter circuit further includes a second electrolytic capacitor, a cathode of the first rectifying diode is connected to an anode of the second electrolytic capacitor, and a cathode of the second electrolytic capacitor is connected to the second synonym output terminal of the second transformer.
In one embodiment, the second adapter circuit further includes a fourth resistor, a cathode of the first rectifying diode is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the second synonym output terminal of the second transformer.
In one embodiment, the second adapter circuit further includes a third capacitor, a resonant resistor, a fifth resistor, and a second rectifying diode, the output terminal of the first rectifying and filtering circuit is connected to one end of the fifth resistor through the third capacitor, the output terminal of the first rectifying and filtering circuit is further connected to one end of the fifth resistor through the resonant resistor, the other end of the fifth resistor is connected to the cathode of the second rectifying diode, and the anode of the second rectifying diode is connected to the output terminal of the modulation chip.
In one embodiment, the resonant resistor includes a first resonant resistor and a second resonant resistor, the output terminal of the first rectifying and filtering circuit is connected to one end of the fifth resistor through the first resonant resistor, and the output terminal of the first rectifying and filtering circuit is further connected to one end of the fifth resistor through the second resonant resistor.
A power adapter comprising the power adapter circuit of any of the above embodiments.
Compared with the prior art, the utility model has at least the following advantages:
the power adapter circuit comprises a first adapter circuit and a second adapter circuit, and the voltage feedback control of the primary layer of the second transformer is performed through the modulation chip so as to adjust the output of the secondary side of the second transformer, so that the first adapter circuit outputs a first direct current and the second adapter circuit outputs a second direct current, the voltage of the second direct current is smaller than that of the first direct current, the direct currents with two different voltage values can be output, and the applicability of the power adapter is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a power adapter circuit according to an embodiment of the present invention;
FIG. 2 is a partial schematic diagram of a first adapter circuit of the power adapter circuit in an embodiment of the utility model;
FIG. 3 is another partial schematic diagram of a first adapter circuit of the power adapter circuit in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second adapter circuit of the power adapter circuit in an embodiment of the utility model.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model provides a power adapter circuit. The power adapter circuit includes a first adapter circuit and a second adapter circuit. The first adapter circuit comprises a first rectifying and filtering circuit, a first modulation circuit, a first transformer circuit and a voltage stabilizing circuit, wherein the input end of the first rectifying and filtering circuit is used for being connected with the output end of an external alternating current device, the output end of the first rectifying and filtering circuit is respectively connected with the input end of the first modulation circuit and the input end of the first transformer circuit, the output end of the first modulation circuit is connected with the input end of the first transformer circuit, the output end of the first transformer circuit is connected with the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit is used for outputting first direct current. The second adapter circuit comprises a second modulation circuit, a second transformer and a second rectifying and filtering circuit, the second modulation circuit comprises a power supply circuit, the output end of the first rectifying and filtering circuit is connected with a primary synonym end of the second transformer, a primary coil of the second transformer is adjacent to an auxiliary coil of the power circuit, the output end of the power circuit is connected with a power supply end of the modulating chip, a feedback end of the modulating chip is connected with an input end of the driving circuit, the output end of the driving circuit is connected with a sampling end of the modulating chip, the output end of the modulating chip is connected with a primary homonym input end of the second transformer, a secondary side of the second transformer is connected with an input end of the second rectifying and filtering circuit, the output end of the second rectifying and filtering circuit is used for outputting second direct current, and the voltage of the second direct current is smaller than that of the first direct current.
According to the power adapter circuit, the power adapter circuit comprises the first adapter circuit and the second adapter circuit, and the voltage feedback control of the primary layer of the second transformer is performed through the modulation chip so as to adjust the output of the secondary side of the second transformer, so that the first adapter circuit outputs the first direct current and the second adapter circuit outputs the second direct current, the voltage of the second direct current is smaller than that of the first direct current, the direct currents with two different voltage values can be output, and the applicability of the power adapter is improved. For a better understanding of the power adapter circuit of the present application, the power adapter circuit of the present application is further explained below:
referring to fig. 1, fig. 2 and fig. 3, a power adapter circuit according to an embodiment is used for outputting a first direct current and a second direct current, both of which are used for inputting an electrical appliance. Further, the power adapter circuit includes a first adapter circuit and a second adapter circuit. The first adapter circuit comprises a first rectifying and filtering circuit 100, a first modulation circuit 200, a first transformer circuit 300 and a voltage stabilizing circuit 400, wherein the input end of the first rectifying and filtering circuit 100 is used for being connected with the output end of an external alternating current device, the output end of the first rectifying and filtering circuit 100 is respectively connected with the input end of the first modulation circuit 200 and the input end of the first transformer circuit 300, the output end of the first modulation circuit 200 is connected with the input end of the first transformer circuit 300, the output end of the first transformer circuit 300 is connected with the input end of the voltage stabilizing circuit 400, and the output end of the voltage stabilizing circuit 400 is used for outputting a first direct current. The second adapter circuit includes a second modulation circuit 500, a second transformer 600, and a second rectifying-filtering circuit 700, the second modulation circuit 500 includes a power supply circuit, the output end of the first rectifying and filtering circuit 100 is connected with the primary synonym end of the second transformer 600, the primary coil of the second transformer 600 is adjacent to the auxiliary coil of the power circuit, the output end of the power circuit is connected with the power supply end of the modulating chip, the feedback end of the modulating chip is connected with the input end of the driving circuit, the output end of the driving circuit is connected with the sampling end of the modulating chip, the output end of the modulating chip is connected with the primary synonym input end of the second transformer 600, the secondary side of the second transformer 600 is connected with the input end of the second rectifying and filtering circuit 700, the output end of the second rectifying and filtering circuit 700 is used for outputting second direct current, and the voltage of the second direct current is smaller than that of the first direct current.
According to the power adapter circuit, the power adapter circuit comprises the first adapter circuit and the second adapter circuit, and the voltage feedback control of the primary layer of the second transformer is performed through the modulation chip so as to adjust the output of the secondary side of the second transformer, so that the first adapter circuit outputs the first direct current and the second adapter circuit outputs the second direct current, the voltage of the second direct current is smaller than that of the first direct current, the direct currents with two different voltage values can be output, and the applicability of the power adapter is improved.
Referring to fig. 4, in one embodiment, the second adapter circuit further includes a first electrolytic capacitor, an anode of the first electrolytic capacitor is connected to the power supply terminal of the modulation chip, and a cathode of the first electrolytic capacitor is grounded. It can be understood that the first electrolytic capacitor C12 is connected with the power supply end of the modulation chip, the first electrolytic capacitor C12 smoothes the voltage jump output by the power supply circuit, high-frequency noise is filtered, after the power supply circuit is powered off, the first electrolytic capacitor C12 can discharge and maintain a period of reaction time, and the anode end of the first electrolytic capacitor C12 ensures that the current does not reversely flow back to the power supply end of the modulation chip, thereby ensuring the input stability of the power supply end of the modulation chip.
Referring to fig. 4, in one embodiment, the second adapter circuit further includes a first resistor R40, a second resistor R41, and a first capacitor C13, and the current peak sampling terminal of the modulation chip is grounded through the first resistor R40, the second resistor R41, and the first capacitor C13, respectively. It can be understood that the first resistor R40 and the second resistor R41 are used to discharge the first capacitor C13, so that when the input voltage decreases, the voltage across the capacitor can decrease through the resistor discharge. The highest peak value of the input voltage is avoided being kept all the time, and the accuracy of sampling data at the current peak value sampling end of the modulation chip is ensured.
Referring to fig. 4, in one embodiment, the second adapter circuit further includes a first feedback resistor R36 and a second feedback resistor R39, the input terminal of the power circuit is connected to the feedback terminal of the modulation chip through the first feedback resistor, and the feedback terminal of the modulation chip is grounded through the second feedback resistor R39. It can be understood that the operational amplifier of the modulation chip has an input current bias and an input current offset, and therefore the first feedback resistor R36 and the second feedback resistor R39 are used for matching the output impedance of the power supply circuit, so that the input current bias and the input current offset are reduced, and the stable operation of the modulation chip is ensured.
Referring to fig. 4, in one embodiment, the second adapter circuit further includes a first rectifying diode D7, a third resistor R46, and a second capacitor, the second dotted output terminal of the second transformer 600 is connected to the anode of the first rectifying diode D7, the cathode of the first rectifying diode D7 is used for outputting a second direct current, the anode of the first rectifying diode D7 is connected to one end of the third resistor R46, the other end of the third resistor R46 is connected to one end of the second capacitor C16, and the other end of the second capacitor C16 is connected to the cathode of the first rectifying diode D7. It can be understood that the absorption loop formed by the second capacitor C16 and the third resistor R46 connected in series is connected in parallel with the rectifier diode, so as to suppress the influence of the reverse peak voltage on the diode, and protect the diode from possible damage caused by insufficient withstand voltage.
Referring to fig. 4, in one embodiment, the second adapter circuit further includes a second electrolytic capacitor C15, a cathode D7 of the first rectifying diode is connected to an anode of the second electrolytic capacitor C15, and a cathode of the second electrolytic capacitor C15 is connected to the second synonym output terminal of the second transformer 600. It can be understood that the anode of the second electrolytic capacitor C15 is connected to the cathode of the first rectifier diode D7, which ensures that the current does not flow in the reverse direction from the second electrolytic capacitor C15, and ensures the stability of the output second direct current.
Referring to fig. 4, in one embodiment, the second adapter circuit further includes a fourth resistor R47, a cathode of the first rectifying diode D7 is connected to one end of the fourth resistor R47, and the other end of the fourth resistor R47 is connected to the second synonym output terminal of the second transformer 600. It can be understood that when the switching power supply is in no-load, the output voltage is very unstable, and even rises to cause the output voltage to be out of control, so that the fourth resistor R47 is equivalently connected in parallel to the secondary terminal of the second transformer 600, the fourth resistor R47 can reduce the higher current, and the fourth resistor R47 can consume the electricity remaining therein when the third capacitor C16 discharges, thereby ensuring the stability of the second rectifying and filtering circuit, and further ensuring the stability of the output second direct current.
Referring to fig. 4, in one embodiment, the second adapter circuit further includes a third capacitor C14, a resonant resistor, a fifth resistor R45, and a second rectifying diode D6, an output terminal of the first rectifying and filtering circuit is connected to one end of the fifth resistor R45 through the third capacitor C14, an output terminal of the first rectifying and filtering circuit is further connected to one end of the fifth resistor R45 through the resonant resistor, the other end of the fifth resistor R45 is connected to a cathode of the second rectifying diode D6, and an anode of the second rectifying diode D6 is connected to an output terminal of the modulation chip. It is understood that the third capacitor C14, the resonant resistor, the fifth resistor R45 and the second rectifying diode D6 form a buffer circuit. The third capacitor C14 is used to absorb the energy output from the output terminal of the first rectifying-filtering circuit 100, suppress voltage spikes, the resonant resistor and the fifth resistor R45 are used to consume energy and weaken the oscillation process, and the second rectifying diode D6 prevents the energy absorbed by the third capacitor C14 from reversely charging the parasitic inductor to generate resonance, so that the voltage oscillation can be effectively suppressed.
Referring to fig. 4, in one embodiment, the resonant resistor includes a first resonant resistor R43 and a second resonant resistor R44, the output terminal of the first rectifying and filtering circuit is connected to one end of the fifth resistor R45 through the first resonant resistor R43, and the output terminal of the first rectifying and filtering circuit is further connected to one end of the fifth resistor R45 through the second resonant resistor R44. It is understood that the third capacitor C14, the resonant resistor, the fifth resistor R45 and the second rectifying diode D6 form a buffer circuit. The third capacitor C14 is used to absorb the energy output from the output terminal of the first rectifying-filtering circuit 100 to suppress voltage spikes, the first resonant resistor R43, the second resonant resistor R44 and the fifth resistor R45 are used to consume energy and weaken the oscillation process, and the second rectifying diode D6 prevents the energy absorbed by the third capacitor C14 from reversely charging the parasitic inductor to generate resonance, so that the voltage oscillation can be effectively suppressed.
Referring to fig. 4, in one embodiment, the secondary winding of the second transformer 600 can be replaced with a secondary winding with a different number of turns. It can be understood that, the number of turns of the secondary coil is changed, and since the number of turns of the primary coil is not changed, the number of turns of the secondary coil can be changed to change the turn ratio, so that the output voltage of the second transformer 600 can be changed, and further, different second direct currents can be output.
In one embodiment, the first dc voltage is 27.55 volts to 30.45 volts and the second dc voltage is 4.75 volts to 5.25 volts.
In one embodiment, the first dc voltage is 27.55 volts to 30.45 volts and the second dc voltage is 11.4 volts to 12.6 volts.
The present application further provides a power adapter comprising the power adapter circuit of any of the above embodiments. Further, the power adapter circuit includes a first adapter circuit and a second adapter circuit. The first adapter circuit comprises a first rectifying and filtering circuit 100, a first modulation circuit 200, a first transformer circuit 300 and a voltage stabilizing circuit 400, wherein the input end of the first rectifying and filtering circuit 100 is used for being connected with the output end of an external alternating current device, the output end of the first rectifying and filtering circuit 100 is respectively connected with the input end of the first modulation circuit 200 and the input end of the first transformer circuit 300, the output end of the first modulation circuit 200 is connected with the input end of the first transformer circuit 300, the output end of the first transformer circuit 300 is connected with the input end of the voltage stabilizing circuit 400, and the output end of the voltage stabilizing circuit 400 is used for outputting a first direct current. The second adapter circuit includes a second modulation circuit 500, a second transformer 600, and a second rectifying-filtering circuit 700, the second modulation circuit 500 includes a power supply circuit, the output end of the first rectifying and filtering circuit 100 is connected with the primary synonym end of the second transformer 600, the primary coil of the second transformer 600 is adjacent to the auxiliary coil of the power circuit, the output end of the power circuit is connected with the power supply end of the modulating chip, the feedback end of the modulating chip is connected with the input end of the driving circuit, the output end of the driving circuit is connected with the sampling end of the modulating chip, the output end of the modulating chip is connected with the primary synonym input end of the second transformer 600, the secondary side of the second transformer 600 is connected with the input end of the second rectifying and filtering circuit 700, the output end of the second rectifying and filtering circuit 700 is used for outputting second direct current, and the voltage of the second direct current is smaller than that of the first direct current.
According to the power adapter, the power adapter circuit comprises the first adapter circuit and the second adapter circuit, and the voltage feedback control of the primary layer of the second transformer is performed through the modulation chip so as to adjust the output of the secondary side of the second transformer, so that the first adapter circuit outputs the first direct current and the second adapter circuit outputs the second direct current, the voltage of the second direct current is smaller than that of the first direct current, the direct currents with two different voltage values can be output, and the applicability of the power adapter is improved.
Compared with the prior art, the utility model has at least the following advantages:
because the power adapter circuit includes first adapter circuit and second adapter circuit, first adapter circuit output first direct current and second adapter circuit output second direct current, and the voltage of second direct current is less than the voltage of first direct current, therefore can output the direct current of two kinds of different voltage values, and then make the scope of power adaptation bigger, improved power adapter's suitability.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A power adapter circuit, comprising:
the first adapter circuit comprises a first rectifying and filtering circuit, a first modulation circuit, a first transformer circuit and a voltage stabilizing circuit, wherein the input end of the first rectifying and filtering circuit is used for being connected with the output end of an external alternating current device, the output end of the first rectifying and filtering circuit is respectively connected with the input end of the first modulation circuit and the input end of the first transformer circuit, the output end of the first modulation circuit is connected with the input end of the first transformer circuit, the output end of the first transformer circuit is connected with the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit is used for outputting a first direct current;
the second adapter circuit comprises a second modulation circuit, a second transformer and a second rectifying and filtering circuit, the second modulation circuit comprises a power circuit, a modulation chip and a driving circuit, the output end of the first rectifying and filtering circuit is connected with the primary synonym end of the second transformer, the primary coil of the second transformer is adjacent to the auxiliary coil of the power circuit, the output end of the power circuit is connected with the power supply end of the modulation chip, the feedback end of the modulation chip is connected with the input end of the driving circuit, the output end of the driving circuit is connected with the sampling end of the modulation chip, the output end of the modulation chip is connected with the primary synonym input end of the second transformer, the secondary side of the second transformer is connected with the input end of the second rectifying and filtering circuit, and the output end of the second rectifying and filtering circuit is used for outputting a second direct current, and the voltage of the second direct current is less than the voltage of the first direct current.
2. The power adapter circuit of claim 1, wherein the second adapter circuit further comprises a first electrolytic capacitor, the positive electrode of the first electrolytic capacitor being connected to the power supply terminal of the modulation chip, the negative electrode of the first electrolytic capacitor being grounded.
3. The power adapter circuit of claim 1, wherein the second adapter circuit further comprises a first resistor, a second resistor, and a first capacitor, and the current peak sampling terminal of the modulation chip is grounded via the first resistor, the second resistor, and the first capacitor, respectively.
4. The power adapter circuit of claim 1, wherein the second adapter circuit further comprises a first feedback resistor and a second feedback resistor, wherein the input terminal of the power circuit is connected to the feedback terminal of the modulation chip through the first feedback resistor, and the feedback terminal of the modulation chip is grounded through the second feedback resistor.
5. The power adapter circuit according to claim 1, wherein the second adapter circuit further comprises a first rectifying diode, a third resistor, and a second capacitor, the second dotted output terminal of the second transformer is connected to an anode of the first rectifying diode, a cathode of the first rectifying diode is used for outputting the second direct current, an anode of the first rectifying diode is connected to one end of the third resistor, the other end of the third resistor is connected to one end of the second capacitor, and the other end of the second capacitor is connected to a cathode of the first rectifying diode.
6. The power adapter circuit of claim 5, wherein the second adapter circuit further comprises a second electrolytic capacitor, the cathode of the first rectifying diode being connected to the anode of the second electrolytic capacitor, the cathode of the second electrolytic capacitor being connected to the secondary synonym output of the second transformer.
7. The power adapter circuit of claim 5, wherein the second adapter circuit further comprises a fourth resistor, wherein the cathode of the first rectifying diode is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the secondary synonym output of the second transformer.
8. The power adapter circuit according to claim 1, wherein the second adapter circuit further comprises a third capacitor, a resonant resistor, a fifth resistor, and a second rectifying diode, the output terminal of the first rectifying and filtering circuit is connected to one end of the fifth resistor through the third capacitor, the output terminal of the first rectifying and filtering circuit is further connected to one end of the fifth resistor through the resonant resistor, the other end of the fifth resistor is connected to the cathode of the second rectifying diode, and the anode of the second rectifying diode is connected to the output terminal of the modulation chip.
9. The power adapter circuit of claim 8, wherein the resonant resistor comprises a first resonant resistor and a second resonant resistor, the output terminal of the first rectifying and filtering circuit is connected to one end of the fifth resistor through the first resonant resistor, and the output terminal of the first rectifying and filtering circuit is further connected to one end of the fifth resistor through the second resonant resistor.
10. A power adapter comprising the power adapter circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122858346.3U CN216490257U (en) | 2021-11-19 | 2021-11-19 | Power adapter circuit and power adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122858346.3U CN216490257U (en) | 2021-11-19 | 2021-11-19 | Power adapter circuit and power adapter |
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| Publication Number | Publication Date |
|---|---|
| CN216490257U true CN216490257U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122858346.3U Active CN216490257U (en) | 2021-11-19 | 2021-11-19 | Power adapter circuit and power adapter |
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| CN (1) | CN216490257U (en) |
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2021
- 2021-11-19 CN CN202122858346.3U patent/CN216490257U/en active Active
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Effective date of registration: 20221212 Address after: No. 333 Xinhua Avenue, Tongqiao Town, Zhongkai high tech Zone, Huizhou City, Guangdong Province 516000 Patentee after: Huizhou Zhongbang power supply Co.,Ltd. Address before: 516006 floors 2-4, No. 16 (plant a), Hechang West Third Road, Zhongkai high tech Zone, Huizhou City, Guangdong Province Patentee before: HUIZHOU ZHONGBANG ELECTRONICS Co.,Ltd. Patentee before: Huizhou Zhongbang power supply Co.,Ltd. |