CN213027803U - Power supply circuit and power supply device - Google Patents
Power supply circuit and power supply device Download PDFInfo
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- CN213027803U CN213027803U CN202021584056.3U CN202021584056U CN213027803U CN 213027803 U CN213027803 U CN 213027803U CN 202021584056 U CN202021584056 U CN 202021584056U CN 213027803 U CN213027803 U CN 213027803U
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Abstract
The utility model discloses a power supply circuit and power supply unit, include: a power input port; the power supply unit is used for converting the alternating current signal of the power supply input port into a direct current signal and is connected with the power supply input port; the power output port is connected to the power supply unit; and the shunting unit is used for absorbing charges remained at the second direct current power supply port after the power supply unit is switched off, and is provided with a shunting input end and a shunting grounding end, wherein the shunting input end is connected to the first direct current power supply port, and the shunting grounding end is connected to the first reference ground. The shunt unit can absorb the charges released by the energy storage element at the second direct current power supply port after the power supply unit is turned off, and shunts the alternating current signal generated by the energy storage element to the first reference ground, so that the residual voltage at the power supply output end is lower than a specified voltage value.
Description
Technical Field
The utility model belongs to the technical field of the electron, concretely relates to power supply circuit and power supply unit.
Background
In recent years, most of popular fan lamps in the market adopt the form of LED lamps, at present, the fan lamps are slightly bright when the fan runs in the market reaction or under the condition that the fan is turned off by a remote controller, and bad experience is brought to users by the phenomenon of 'ghost fire'.
The main reasons for the "ghost fire" phenomenon are: when the LED lamp works, the power supply circuit provides working power supply for the LED lamp, and when the LED lamp does not work, the power supply circuit can cut off the power supply for the LED lamp. However, when the power supply circuit supplies a working power supply to the LED lamp, the energy storage element in the power supply circuit stores electric energy, and when the power supply circuit turns off the power supply for the LED lamp, the energy storage element in the power supply circuit releases electric energy, so that a weak current flows through the LED lamp, the LED lamp cannot be completely extinguished, and a phenomenon of "ghost fire" occurs.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a supply circuit and power supply unit, can be in under the condition of turn-offs at supply circuit, solve "ghost fire" phenomenon.
The utility model provides a technical scheme that its problem adopted is:
in one aspect, an embodiment of the present invention provides a power supply circuit, including:
the power input port comprises a first alternating current power port and a second alternating current power port which are used for connecting an external alternating current power supply;
the power supply unit is used for converting the alternating current signal of the power supply input port into a direct current signal and comprises a first input end, a second input end, a first output end and a second output end, wherein the first input end is connected to the first alternating current power supply port, and the second input end is connected to the second alternating current power supply port;
the power output port comprises a first direct-current power port and a second direct-current power port which are used for outputting direct-current electric signals, the first output end is connected to the first direct-current power port, and the second output end is connected to the second direct-current power port;
the shunt unit is used for absorbing the electric charges remained on the second direct current power port after the power supply unit is turned off, the shunt unit is provided with a shunt input end and a shunt grounding end, the shunt input end is connected to the first direct current power port, and the shunt grounding end is connected to a first reference ground.
The embodiment of the utility model provides an in one or more technical scheme, following beneficial effect has at least: compare fan LED lamp in traditional technique, the utility model discloses set up the reposition of redundant personnel unit in power supply circuit, the reposition of redundant personnel unit is provided with the reposition of redundant personnel input and shunts the earthing terminal, and the reposition of redundant personnel input is connected in first direct current power port, the reposition of redundant personnel earthing terminal is connected in first reference ground, can absorb the electric charge that remains in second direct current power port after power supply unit shuts off like this, and shunt this electric charge to first reference ground, make power output port's residual voltage be less than the operating voltage value of LED lamp, avoid the LED lamp to give out light, thereby reach the purpose of eliminating "ghost fire" phenomenon. Therefore, the utility model relates to a portably rationally, can effectively eliminate the "ghost fire" phenomenon of the existence in the circuit, have excellent performance.
According to the utility model discloses an aspect a supply circuit, power supply unit still including be used for carrying out rectification filtering's input rectification filtering module, be used for with to the alternating current power supply who inserts the direct current low-voltage signal that obtains after the rectification filtering of input rectification filtering module invertion become high-voltage signal's contravariant module and be used for with high-voltage signal rectification filtering becomes smooth direct current signal's output rectification filtering module. The alternating current power supply is rectified and filtered into stable direct current voltage through the input rectifying and filtering module, peak voltage generated during power supply inversion is favorably reduced, electric energy conversion efficiency is improved, voltage ripples in the power supply circuit can be effectively absorbed by the output rectifying and filtering module, and the effect of stable output is achieved.
According to the utility model discloses a supply circuit of first aspect, the input rectification filter module includes EMI filter circuit and input rectifier bridge, the input rectifier bridge connect in the EMI filter circuit; the input rectifier bridge is provided with a first rectifier input end, a second rectifier input end, a direct current output end and a direct current grounding end, a third capacitor is connected between the direct current output end and the first reference ground, and a fourth capacitor is connected between the direct current grounding end and the first reference ground. The frequency of the unwanted electromagnetic interference is much higher than the normal signal frequency and the EMI filter circuit is able to selectively block or shunt unwanted high frequency noise. EMI filter circuits are capable of passing dc electrical signals and filtering out unwanted high frequency noise from reaching sensitive circuit portions in the power supply circuit, which significantly reduces or attenuates unwanted noise signals entering or leaving the protected electronic device.
A power supply circuit according to the first aspect of the present invention, wherein the EMI filter circuit includes a live wire terminal, a neutral wire terminal, a first capacitor, a second capacitor, a first common mode inductor, a differential mode inductor, a first differential mode capacitor, and a second differential mode capacitor, the first capacitor is serially connected between the live wire terminal and the first reference ground, the second capacitor is serially connected between the dc output terminal and the first reference ground, the first common mode inductor includes a first coil and a second coil, the differential mode inductor includes a third coil and a fourth coil, the first coil and the third coil are serially connected to a first connection point, the second coil and the fourth coil are serially connected to a second connection point, the first coil is serially connected to the first ac power port, the second coil is serially connected to the second ac power port, the third coil and the first rectification input terminal are serially connected to a third connection point, the fourth coil and the second rectification input end are connected in series to a fourth connection point; the first differential mode capacitor is connected in series between the first connection point and the second connection point, and the second differential mode capacitor is connected in series between the third connection point and the fourth connection point. The differential mode inductor can filter differential mode interference in the circuit, the common mode inductor can filter or attenuate common mode interference such as radiation, lightning stroke and the like, and the differential mode inductor is used for filtering or attenuating differential mode interference such as peak voltage generated in the power supply circuit, so that the common mode inductor not only can play a good EMI filtering role, and the EMC problem of the control circuit can be effectively improved.
According to the utility model discloses a supply circuit of first aspect, contravariant module includes transformer and fifth electric capacity, the one end of the secondary coil of transformer is passed through fifth electric capacity is connected to the second is referenced ground. The transformer T1 can transfer electric energy efficiently, and the fifth capacitor has the function of filtering.
According to the utility model discloses a supply circuit of first aspect, the reposition of redundant personnel unit includes sixth electric capacity and seventh electric capacity, sixth electric capacity with seventh electric capacity all concatenate in first direct current power port with between the first reference ground. When the power supply is turned off, the weak current of the second direct current power supply port can be absorbed by the shunt unit. The sixth capacitor and the seventh capacitor are added to shunt the alternating current signal generated by the fifth capacitor to a first reference ground, so that the residual voltage on the first direct current power port and the second direct current power port is lower than the lighting voltage value of the lamp beads, and the purpose of eliminating the ghost fire phenomenon is achieved.
According to the utility model discloses an aspect a supply circuit, output rectifier and filter module includes output rectifier circuit and output filter circuit, output filter circuit connect in output rectifier circuit, output rectifier circuit connect in the contravariant module. The output voltage is rectified and then converted into direct current with large amplitude fluctuation, and the direct current is filtered into stable direct current output through an output filter circuit.
According to the utility model discloses a supply circuit of first aspect, output rectifier circuit includes output rectifier diode, current limiting resistor and absorption capacitance, current limiting resistor with absorption capacitance series connection with output rectifier diode is parallelly connected. The absorption circuit composed of the current-limiting resistor and the absorption capacitor can prevent the device from being damaged and prevent the voltage breakdown or current breakdown, thereby improving the reliability, reducing the loss of circuit elements, reducing the peak voltage and peak current, improving the EMI quality and improving the efficiency.
According to a first aspect of the present invention, the output filter circuit comprises a first output filter capacitor, a second output filter capacitor, a third output filter capacitor and a second common mode inductor, the second common mode inductor comprises a fifth coil and a sixth coil, the fifth coil is connected in series between the output rectifier diode and the first output end, the sixth coil is connected in series between the inverter module and the second output end, one end of the first output filter capacitor is connected to the connection position of the output rectifier diode and the fifth coil, the other end of the first output filter is connected with the junction of the inversion module and the sixth coil, the second output filter capacitor and the third output filter capacitor are connected in parallel to the first direct current power port and the second direct current power port. The EMC of the system is increased by providing a second stage common mode choke having a plurality of identical windings in which current flows in opposite directions and in the core of which the magnetic field is cancelled for suppressing interference radiation. The output filter capacitor is used for filtering ripples generated by the high-frequency switching device and has the function of stabilizing voltage.
In addition, another embodiment of the present invention further provides a power supply device, which includes the power supply circuit as described above.
The embodiment of the utility model provides an in one or more technical scheme, following beneficial effect has at least: compared with the power supply device in the prior art, the utility model discloses set up the reposition of redundant personnel unit in power supply device, the reposition of redundant personnel unit is provided with reposition of redundant personnel input and reposition of redundant personnel earthing terminal, and the reposition of redundant personnel input is connected in first direct current power port, the reposition of redundant personnel earthing terminal is connected in first reference ground, the reposition of redundant personnel unit can absorb the electric charge that remains in second direct current power port after power supply device shuts off, and shunt this electric charge to first reference ground, make power supply device's power output port's residual voltage be less than the operating voltage value of LED lamp, avoid the LED lamp to give out light, thereby reach the purpose of eliminating "ghost fire" phenomenon. Therefore, the utility model relates to a portably rationally, can effectively eliminate the "ghost fire" phenomenon of the existence in the circuit, have excellent performance.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The following description of the preferred embodiments of the present invention will be made with reference to the accompanying drawings.
Fig. 1 is a block diagram of a power supply circuit according to an embodiment of the present invention;
fig. 2 is a block diagram of a power supply unit according to an embodiment of the present invention;
FIG. 3 is a further block diagram of FIG. 2;
fig. 4 is a circuit diagram of a power supply circuit according to an embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1, an embodiment of the present invention provides a power supply circuit, including:
the power input port 100, the power input port 100 including a first ac power port L and a second ac power port N for connecting an external ac power;
a power supply unit 110 for converting an ac signal of the power input port 100 into a dc signal, the power supply unit 110 including a first input Vi1, a second input Vi2, a first output M1 and a second output M2, the first input Vi1 being connected to a first ac power port L, the second input Vi2 being connected to a second ac power port N;
the power output port 120, the power output port 120 includes a first dc power port VO1 and a second dc power port VO2 for outputting a dc electrical signal, the first output terminal M1 is connected to the first dc power port VO1, and the second output terminal M2 is connected to the second dc power port VO 2;
the shunt unit 130 is configured to absorb charges remaining at the second dc power port VO2 when the power supply unit 110 is turned off, and is provided with a shunt input terminal and a shunt ground terminal GND1, the shunt input terminal is connected to the first dc power port VO1, and the shunt ground terminal GND1 is connected to the first ground reference.
The embodiment of the utility model provides an in one or more technical scheme, following beneficial effect has at least: compare fan LED lamp in traditional technique, the utility model discloses set up the reposition of redundant personnel unit in power supply circuit, the reposition of redundant personnel unit is provided with the reposition of redundant personnel input and shunts the earthing terminal, and the reposition of redundant personnel input is connected in first direct current power port, the reposition of redundant personnel earthing terminal is connected in first reference ground, can absorb the electric charge that remains in second direct current power port after power supply unit shuts off like this, and shunt this electric charge to first reference ground, make power output port's residual voltage be less than the operating voltage value of LED lamp, avoid the LED lamp to give out light, thereby reach the purpose of eliminating "ghost fire" phenomenon. Therefore, the utility model relates to a portably rationally, can effectively eliminate the "ghost fire" phenomenon of the existence in the circuit, have excellent performance.
Referring to fig. 2, according to the power supply circuit of the first aspect of the present invention, the power supply unit 110 further includes an input rectifying and filtering module 111 for performing rectifying and filtering on the accessed ac power supply, an inverter module 112 for inverting the dc low voltage signal obtained after the rectifying and filtering of the input rectifying and filtering module 111 into a high voltage signal, and an output rectifying and filtering module 113 for rectifying and filtering the high voltage signal into a smooth dc signal. Alternating current power supply becomes comparatively stable direct current voltage through input rectifier filter module 111 rectification filtering, and this produced peak voltage when being favorable to reducing the power contravariant for electric energy conversion efficiency obtains promoting, and the voltage ripple among the power supply circuit is fallen in the absorption that output rectifier filter module 113 can be preferred, plays the effect of stabilizing the output.
Referring to fig. 3, according to a power supply circuit of the first aspect of the present invention, the input rectifying and filtering module 111 includes an EMI filter circuit 1110 and an input rectifying bridge 1111, and the input rectifying bridge 1111 is connected to the EMI filter circuit 1110. The output rectifying and filtering module 113 includes an output rectifying circuit 1130 and an output filtering circuit 1131, and the output filtering circuit 1131 is connected to the output rectifying circuit 1130. The frequency of the unwanted electromagnetic interference is much higher than the normal signal frequency and the EMI filter circuit is able to selectively block or shunt unwanted high frequency noise. EMI filter circuits are capable of passing dc electrical signals and filtering out unwanted high frequency noise from reaching sensitive circuit portions in the power supply circuit, which significantly reduces or attenuates unwanted noise signals entering or leaving the protected electronic device.
Referring to fig. 4, according to a power supply circuit of the first aspect of the present invention, the EMI filter circuit 1110 includes a live wire terminal U1, a neutral wire terminal U2, a dc output terminal U3, a first capacitor CY1, a third capacitor CY3, a first common mode inductor T2, a differential mode inductor TR, a first differential mode capacitor X1 and a second differential mode capacitor X2, the first capacitor CY1 is connected in series between the live wire terminal U1 and a first ground GND1, the second capacitor CY2 is connected in series between the dc output terminal U3 and the first ground GND1, the first common mode inductor includes a first coil S1 and a second coil S2, the differential mode inductor includes a third coil S3 and a fourth coil S4, the first coil S1 and the third coil S3 are connected in series to the first connection point U1, the second coil S2 and the second coil S2 are connected in series to the second connection point U2, the first coil S8672 and the second ac power supply port N2 are connected in series, the third coil S3 and the first rectified input terminal are connected in series to the third connection point U3, and the fourth coil S4 and the second rectified input terminal are connected in series to the fourth connection point U4; the first differential mode capacitor is connected in series between the first connection point U1 and the second connection point U2, and the second differential mode capacitor is connected in series between the third connection point U3 and the fourth connection point U4. The differential mode inductor can filter differential mode interference in the circuit, the common mode inductor can filter or attenuate common mode interference such as radiation, lightning stroke and the like, and the differential mode inductor is used for filtering or attenuating differential mode interference such as peak voltage generated in the power supply circuit, so that the common mode inductor not only can play a good EMI filtering role, and the EMC problem of the control circuit can be effectively improved.
In this embodiment, the input rectifying bridge is provided with a first rectifying input terminal, a second rectifying input terminal, a dc output terminal and a dc ground terminal, a second capacitor CY2 is connected between the dc output terminal and the first reference ground, and a fourth capacitor CY4 is connected between the dc ground terminal and the first reference ground. The input rectifier bridge is used for rectifying alternating current signals at the power input end into direct current signals, and the second capacitor and the fourth capacitor have the functions of filtering and stabilizing voltage.
In the present embodiment, the inverter module 112 includes a transformer T1 and a fifth capacitor CY5, and one end of the secondary coil of the transformer T1 is connected to the second ground reference GND2 through the fifth capacitor CY 5. The transformer T1 can transfer electric energy efficiently, and the fifth capacitor CY5 has a filtering function.
In this embodiment, the shunt unit 130 includes a sixth capacitor CY6 and a seventh capacitor CY7, and the sixth capacitor CY6 and the seventh capacitor CY7 are both connected in series between the first dc power port VO1 and the first ground GND 1. So that the weak current of the second dc power port VO2 is absorbed by the shunting unit 130 after the power is turned off. When the power supply is turned off, the weak current of the second direct current power supply port can be absorbed by the shunt unit. The sixth capacitor and the seventh capacitor are added to shunt the alternating current signal generated by the fifth capacitor to a first reference ground, so that the residual voltage on the first direct current power port and the second direct current power port is lower than the lighting voltage value of the lamp beads, and the purpose of eliminating the ghost fire phenomenon is achieved.
In the present embodiment, the output rectifying circuit 1130 includes an output rectifying diode D3, a current limiting resistor R60, and a snubber capacitor C25, and the current limiting resistor R60 and the snubber capacitor C25 are connected in series and in parallel with the output rectifying diode D3. The absorption circuit composed of the current-limiting resistor and the absorption capacitor can prevent the device from being damaged and prevent the voltage breakdown or current breakdown, thereby improving the reliability, reducing the loss of circuit elements, reducing the peak voltage and peak current, improving the EMI quality and improving the efficiency.
In this embodiment, the output filter circuit 1130 includes a first output filter capacitor C20, a second output filter capacitor C21, a third output filter capacitor C26 and a second common mode inductor T3, the second common mode inductor T3 includes a fifth coil S5 and a sixth coil S6, the fifth coil S5 is connected in series between the output rectifier diode D3 and the first output terminal VO1, the sixth coil S6 is connected in series between the inverter module and the second output terminal VO2, one end of the first output filter capacitor C20 is connected to the connection point of the output rectifier diode D3 and the fifth coil S5, the other end of the first output filter capacitor C20 is connected to the connection point of the inverter module 112 and the sixth coil S6, and the second output filter capacitor C21 and the third output filter capacitor C26 are connected in parallel to the first dc port VO1 and the second dc power port VO 2. The common mode inductor is added at the second direct current power supply port, so that electromagnetic interference signals can be filtered, electromagnetic interference signals mixed in electric signals can be effectively inhibited and filtered, and the EMC problem of the control circuit is improved. The filter capacitor can filter the output voltage, so that the output voltage becomes smooth and stable.
In addition, another embodiment of the present invention further provides a power supply device, which includes the power supply circuit as in any one of the above embodiments. The power supply device has the advantages brought by the power supply circuit in any embodiment, namely, the power supply device at least has the following advantages: compared with the power supply device in the prior art, the utility model discloses set up the reposition of redundant personnel unit in power supply device, the reposition of redundant personnel unit is provided with reposition of redundant personnel input and reposition of redundant personnel earthing terminal, and the reposition of redundant personnel input is connected in first direct current power port, the reposition of redundant personnel earthing terminal is connected in first reference ground, the reposition of redundant personnel unit can absorb the electric charge that remains in second direct current power port after power supply device shuts off, and shunt this electric charge to first reference ground, make power supply device's power output port's residual voltage be less than the operating voltage value of LED lamp, avoid the LED lamp to give out light, thereby reach the purpose of eliminating "ghost fire" phenomenon. Therefore, the utility model relates to a portably rationally, can effectively eliminate the "ghost fire" phenomenon of the existence in the circuit, have excellent performance.
While the preferred embodiment and basic principles of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is intended to cover various modifications, equivalents and alternatives falling within the scope of the invention as claimed.
Claims (10)
1. A power supply circuit, comprising:
the power input port comprises a first alternating current power port and a second alternating current power port which are used for connecting an external alternating current power supply;
the power supply unit is used for converting the alternating current signal of the power supply input port into a direct current signal and comprises a first input end, a second input end, a first output end and a second output end, wherein the first input end is connected to the first alternating current power supply port, and the second input end is connected to the second alternating current power supply port;
the power output port comprises a first direct-current power port and a second direct-current power port which are used for outputting direct-current electric signals, the first output end is connected to the first direct-current power port, and the second output end is connected to the second direct-current power port;
the shunt unit is used for absorbing the electric charges remained on the second direct current power port after the power supply unit is turned off, the shunt unit is provided with a shunt input end and a shunt grounding end, the shunt input end is connected to the first direct current power port, and the shunt grounding end is connected to a first reference ground.
2. A power supply circuit as claimed in claim 1, characterized in that: the power supply unit also comprises an input rectification filter module for rectifying and filtering the accessed alternating current power supply, an inversion module for inverting a direct current low-voltage signal obtained after the rectification and filtering of the input rectification filter module into a high-voltage signal and an output rectification filter module for rectifying and filtering the high-voltage signal into a smooth direct current signal.
3. A power supply circuit as claimed in claim 2, characterized in that: the input rectifying and filtering module comprises an EMI filtering circuit and an input rectifying bridge, and the input rectifying bridge is connected with the EMI filtering circuit; the input rectifier bridge is provided with a first rectifier input end, a second rectifier input end, a direct current output end and a direct current grounding end, a third capacitor is connected between the direct current output end and the first reference ground, and a fourth capacitor is connected between the direct current grounding end and the first reference ground.
4. A power supply circuit as claimed in claim 3, characterized in that: the EMI filter circuit comprises a live wire end, a zero wire end, a first capacitor, a second capacitor, a first common mode inductor, a differential mode inductor, a first differential mode capacitor and a second differential mode capacitor, wherein the first capacitor is connected between the live wire end and the first reference ground in series, the second capacitor is connected between the direct current output end and the first reference ground in series, the first common mode inductor comprises a first coil and a second coil, the differential mode inductor comprises a third coil and a fourth coil, the first coil and the third coil are connected in series with a first connection point, the second coil and the fourth coil are connected in series with a second connection point, the first coil is connected in series with the first alternating current power port, the second coil is connected in series with the second alternating current power port, and the third coil and the first rectification input end are connected in series with a third connection point, the fourth coil and the second rectification input end are connected in series to a fourth connection point; the first differential mode capacitor is connected in series between the first connection point and the second connection point, and the second differential mode capacitor is connected in series between the third connection point and the fourth connection point.
5. A power supply circuit as claimed in claim 2, characterized in that: the inversion module comprises a transformer and a fifth capacitor, and one end of a secondary coil of the transformer is connected to a second reference ground through the fifth capacitor.
6. A power supply circuit as claimed in claim 1, characterized in that: the shunt unit comprises a sixth capacitor and a seventh capacitor, and the sixth capacitor and the seventh capacitor are connected in series between the first direct current power port and the first reference ground.
7. A power supply circuit as claimed in claim 2, characterized in that: the output rectifying and filtering module comprises an output rectifying circuit and an output filtering circuit, the output filtering circuit is connected with the output rectifying circuit, and the output rectifying circuit is connected with the inversion module.
8. A power supply circuit as claimed in claim 7, wherein: the output rectifying circuit comprises an output rectifying diode, a current-limiting resistor and an absorption capacitor, wherein the current-limiting resistor and the absorption capacitor are connected in series and are connected in parallel with the output rectifying diode.
9. A power supply circuit as claimed in claim 8, wherein: output filter circuit includes first output filter capacitor, second output filter capacitor, third output filter capacitor and second common mode inductor, second common mode inductor is including fifth coil and sixth coil, the fifth coil establish ties in output rectifier diode with between the first output, the sixth coil establish ties in the contravariant module with between the second output, first output filter capacitor's one end is connected output rectifier diode with the junction of fifth coil, the other end of first output filter capacitor is connected the contravariant module with the junction of sixth coil, second output filter capacitor with third output filter capacitor connects in parallel first direct current power port with second direct current power port.
10. A power supply device, characterized by: comprising a supply circuit as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021584056.3U CN213027803U (en) | 2020-08-03 | 2020-08-03 | Power supply circuit and power supply device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021584056.3U CN213027803U (en) | 2020-08-03 | 2020-08-03 | Power supply circuit and power supply device |
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| CN213027803U true CN213027803U (en) | 2021-04-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115085555A (en) * | 2022-05-20 | 2022-09-20 | 荣耀终端有限公司 | Power supply circuit and power adapter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115085555A (en) * | 2022-05-20 | 2022-09-20 | 荣耀终端有限公司 | Power supply circuit and power adapter |
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