CN206226307U - A kind of direct-current switch power supply circuit - Google Patents
A kind of direct-current switch power supply circuit Download PDFInfo
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- CN206226307U CN206226307U CN201621303824.7U CN201621303824U CN206226307U CN 206226307 U CN206226307 U CN 206226307U CN 201621303824 U CN201621303824 U CN 201621303824U CN 206226307 U CN206226307 U CN 206226307U
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Abstract
The utility model implementation method discloses a kind of direct-current switch power supply circuit, including：EMI circuits, the first current rectifying and wave filtering circuit, power conversion circuit, the second current rectifying and wave filtering circuit, direct current output module is input into over under-voltage protection circuit.It is different from prior art, a kind of direct-current switch power supply circuit that the utility model implementation method is provided, 220V alternating currents are filtered by EMI circuits, rectifying and wave-filtering is carried out by current rectifying and wave filtering circuit, direct current output is carried out by power conversion circuit, then after carrying out secondary rectifying and wave-filtering by current rectifying and wave filtering circuit；There is input over under-voltage protection circuit in input, circuit automatic shutdown circuit is controlled when input voltage is abnormal, circuit automatic restoring circuit is controlled after abnormal disappearance；There is output over under-voltage protection circuit in output end, circuit automatic shutdown circuit is controlled when output voltage is abnormal, circuit automatic restoring circuit is controlled after abnormal disappearance.
Description
Technical Field
The utility model discloses embodiment relates to the circuit field, especially relates to a direct current switch power supply circuit.
Background
The existing commercial power is 220v alternating current, the alternating current is convenient to generate, the power generation efficiency is high, the transmission is convenient, a step-up transformer can be used for boosting voltage, a step-down transformer can be used for reducing voltage, the current on a power transmission line can be reduced by adopting high-voltage power transmission, the electric energy loss of the power transmission line is greatly reduced, and the power transmission efficiency is improved. However, most of the current electronic products use low-voltage direct current for power supply, and when the electronic products are used, the alternating current needs to be converted into the direct current through a direct current switching power supply circuit.
The inventors found that the related art has the following problems: the existing direct current switch power supply circuit has the disadvantages of large volume, small output power, high production cost and difficult large-scale use.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves of embodiment provides a direct current switch power supply circuit, and is small, and power is big, is convenient for use on a large scale.
In order to solve the technical problem, the utility model discloses a technical scheme be: provided is a direct current switching power supply circuit including:
the EMI circuit is used for receiving the alternating current signal and filtering a high-frequency interference signal in the alternating current signal;
the first rectifying and filtering circuit is connected with the EMI circuit and converts alternating current passing through the EMI circuit into direct current;
the power conversion circuit is connected with the first rectification filter circuit and is used for performing power conversion on the electric signal passing through the first rectification filter circuit;
the second rectifying and filtering circuit is connected with the power conversion circuit and converts the alternating current signal passing through the second rectifying and filtering circuit into a direct current signal;
the direct current output module outputs the electric signal passing through the second rectifying and filtering circuit;
and the input over-voltage and under-voltage protection circuit is connected with the first rectification filter circuit and is used for detecting whether the electric signal passing through the first rectification filter circuit is abnormal or not, and if the electric signal is detected to be abnormal, an interrupt signal is sent out.
Wherein the DC switching power supply further comprises:
and the control circuit is respectively connected with the input over-voltage and under-voltage protection circuit, the control circuit and the output module and receives an electric signal passing through the input over-voltage and under-voltage protection circuit or the output module.
Wherein, the output module further comprises: the circuit comprises a direct current output circuit, a current-limiting protection circuit, an output over-voltage and under-voltage protection circuit, a voltage sampling circuit, a short-circuit protection circuit and a voltage stabilizing loop circuit.
Wherein,
the current-limiting protection circuit, the output over-voltage and under-voltage protection circuit, the voltage sampling circuit and the short-circuit protection circuit are respectively connected with the direct current output circuit, and the direct current output circuit is connected with the second rectification filter circuit.
And the direct current output circuit receives the direct current signal passing through the second rectifying and filtering circuit and then outputs the direct current signal.
Wherein,
the current-limiting protection circuit receives the electric signal passing through the direct current output circuit and is used for limiting the current in the circuit from being overlarge;
and the output over-voltage and under-voltage protection circuit receives the electrical signal passing through the direct current output circuit and is used for detecting whether the electrical signal passing through the direct current output circuit is abnormal or not, and if the electrical signal passing through the direct current output circuit is detected to be abnormal, an interrupt signal is sent out.
Wherein,
and the voltage sampling circuit is used for receiving the electric signal of the direct current output circuit, acquiring the electric signal from the direct current output circuit, detecting the voltage value of the direct current output circuit, compensating and ensuring the stability of the output voltage.
And the short-circuit protection circuit receives the electric signal of the direct current output circuit, and sends a cutting-off signal to cut off the circuit when detecting that the short-circuit current generated in the circuit loop is overlarge.
The current-limiting protection circuit, the output over-voltage and under-voltage protection circuit and the short-circuit protection circuit are respectively connected with the control circuit.
The voltage stabilizing loop circuit is connected with the voltage sampling circuit and then connected with the control circuit.
The voltage stabilizing loop circuit obtains the electric signal from the voltage sampling circuit and dynamically adjusts the voltage to enable the output voltage to be a stable value.
The utility model discloses embodiment's beneficial effect is: different from the prior art, the embodiment of the utility model provides a direct current switch power supply circuit, 220V alternating current carries out the filtering through the EMI circuit, carries out primary rectification filtering by the rectification filter circuit, through power conversion circuit, carries out direct current output after the secondary rectification filtering by the rectification filter circuit again; the input end is provided with an input over-voltage and under-voltage protection circuit, the control circuit automatically cuts off the circuit when the input voltage is abnormal, and the control circuit automatically restores the circuit after the abnormality disappears; the output end is provided with a voltage sampling feedback circuit which detects the voltage output in real time and compensates the voltage output to ensure the stability of the output voltage; the output end is provided with an output over-voltage and under-voltage protection circuit, when the output voltage is abnormal, the control circuit automatically cuts off the circuit, and after the abnormality disappears, the control circuit automatically restores the circuit; the output end is provided with a current limiting and short-circuit protection circuit, when the output current is abnormal, the control circuit automatically cuts off the circuit, and after the abnormality disappears, the control circuit automatically restores the circuit. The high-power LED lamp has the advantages of small volume, large output power and low price, can be widely applied to other products, and has the functions of overvoltage and undervoltage protection, voltage compensation, current-limiting protection and the like.
Drawings
Fig. 1 is a block diagram of a dc switching power supply circuit according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and embodiments. 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 be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.
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 in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides a dc switching power supply circuit, including:
an EMI (Electro Magnetic Interference) circuit 11, a first rectifying and filtering circuit 12, a power conversion circuit 13, a second rectifying and filtering circuit 14, an output module 15, an input over-voltage and under-voltage protection circuit 16 and a control circuit 17, wherein the EMI circuit 11 is connected with the first rectifying and filtering circuit 12, the first rectifying and filtering circuit 12 is respectively connected with the power conversion circuit 13 and the input over-voltage and under-voltage protection circuit 16, the power conversion circuit 13 is respectively connected with the control circuit 17 and the second rectifying and filtering circuit 14, the second rectifying and filtering circuit 14 is connected with the output module 15, and the output module 15 is connected with the control circuit 17.
The EMI circuit 11 is a low-pass filter circuit composed of a series reactor and a parallel capacitor, and functions to access 220v ac power, allow current electrical frequency signals to enter the device, filter high-frequency signals, and have a large blocking effect on high-frequency interference signals.
And a first rectifying and filtering circuit 12 for converting the alternating current passing through the EMI circuit 11 into direct current. The alternating voltage with positive and negative changes is changed into unidirectional pulsating voltage by utilizing the unidirectional conductivity of the diode. The rectifier diode is periodically switched on and off to obtain pulsating direct current. In the positive half cycle of the power supply, the diode is conducted, so that the current on the load is completely the same as the voltage waveform; in the negative half cycle of the power supply voltage, the diode is in a reverse cut-off state and bears the negative half cycle voltage of the power supply, and the load voltage is almost zero.
The power conversion circuit 13 converts power of the electric signal passing through the first rectifying/smoothing circuit 12.
The second rectifying/smoothing circuit 14 performs smoothing again on the electric signal having passed through the power conversion circuit 13, and converts the direct-current electric signal into an alternating-current electric signal. The alternating voltage with positive and negative changes is changed into unidirectional pulsating voltage by utilizing the unidirectional conductivity of the diode. The rectifier diode is periodically switched on and off to obtain pulsating direct current. In the positive half cycle of the power supply, the diode is conducted, so that the current on the load is completely the same as the voltage waveform; in the negative half cycle of the power supply voltage, the diode is in a reverse cut-off state and bears the negative half cycle voltage of the power supply, and the load voltage is almost zero.
And a dc output module 15 for outputting the electrical signal passing through the second rectifying and filtering circuit 14.
The dc output module 15 further includes: the dc output circuit 151, the current limiting protection circuit 152, the output overvoltage and undervoltage protection circuit 153, the voltage sampling circuit 154, the short-circuit protection circuit 155, and the voltage stabilization loop circuit 156, wherein the current limiting protection circuit 152, the output overvoltage and undervoltage protection circuit 153, the voltage sampling circuit 154, and the short-circuit protection circuit 155 are respectively connected to the dc output circuit 151, and the current limiting protection circuit 152, the output overvoltage and undervoltage protection circuit 153, and the short-circuit protection circuit 155 are respectively connected to the control circuit 16. The regulator loop circuit 156 is connected to the voltage sampling circuit 154 and then to the control circuit 16.
And the dc output circuit 151 is configured to receive the dc signal passing through the second rectifying and filtering circuit 14 and output the dc signal. The current-limiting protection circuit 152 receives the electrical signal passing through the dc output circuit 151, and is used to limit the current in the circuit from being too large, thereby ensuring the working safety of other components. And an output overvoltage/undervoltage protection circuit 153, which receives the electrical signal passing through the dc output circuit 151, and is configured to detect whether the electrical signal passing through the dc output circuit 151 is abnormal, and if the electrical signal is detected to be abnormal, send an interrupt signal to turn off the circuit. The voltage sampling circuit 154 receives the electrical signal of the dc output circuit 151, obtains the electrical signal from the dc output circuit 151, detects the voltage value of the dc output circuit 151, and compensates the detected voltage value to ensure the stability of the output voltage. The short-circuit protection circuit 155 receives an electric signal from the dc output circuit 151, and when detecting that a short-circuit current is excessively generated in the circuit loop, generates a cutoff signal to cut off the circuit. The voltage stabilizing circuit 156 is used for obtaining the electrical signal from the voltage sampling circuit and dynamically adjusting the voltage so that the output voltage becomes a stable value.
The input overvoltage/undervoltage protection circuit 16 is used for detecting whether the electrical signal passing through the first rectifying/filtering circuit 12 is abnormal, and if the electrical signal is detected to be abnormal, an interrupt signal is sent out to cut off the circuit.
The control circuit 17 receives the electrical signal inputted to the overvoltage/undervoltage protection circuit 16 or the output module 15, on one hand, samples the signal from the output module 15, compares the sampled signal with a set value, and then sends a control signal to the power conversion circuit 13, and on the other hand, provides a control signal to perform protection measures on the power conversion signal according to the circuit signal inputted to the overvoltage/undervoltage protection circuit 16 through identification.
After the EMI circuit 11 is connected with 220V alternating current, high-frequency interference signals are filtered, then the first rectifying and filtering circuit 11 carries out first rectifying and filtering to change alternating current signals into direct current signals, and meanwhile, if the electrical signals are abnormal, the input overvoltage and undervoltage protection circuit 16 sends out interrupt signals to cut off the circuit. If the electric signal is normal, the power conversion circuit 13 performs power conversion to amplify the electric signal, and then the second rectifying and filtering circuit 14 performs second rectifying and filtering to convert the ac electric signal into a dc electric signal. The dc output circuit 151 then outputs a dc signal. The current limiting protection circuit 152 receives the electrical signal through the dc output circuit 151, and the current in the limiting circuit is not too large. The output overvoltage/undervoltage protection circuit 153 receives the electrical signal passing through the dc output circuit 151, detects whether the electrical signal passing through the dc output circuit 151 is abnormal, and if the electrical signal is detected to be abnormal, sends an interrupt signal to cut off the circuit. The voltage sampling circuit 154 receives the electric signal of the dc output circuit 151, acquires the electric signal from the dc output circuit 151, detects the voltage value of the dc output circuit 151, and holds the voltage value. The short-circuit protection circuit 155 receives an electric signal from the dc output circuit 151, and when detecting that a short-circuit current is excessively generated in the circuit loop, generates a cutoff signal to cut off the circuit. The voltage stabilizing circuit 156 is used for obtaining the electrical signal from the voltage sampling circuit and dynamically adjusting the voltage so that the output voltage becomes a stable value. The control circuit 17 receives the control electric signal to perform circuit disconnection and circuit conduction.
Different from the prior art, the embodiment of the utility model provides a direct current switch power supply circuit, 220V alternating current carries out the filtering through the EMI circuit, carries out primary rectification filtering by the rectification filter circuit, through power conversion circuit, carries out direct current output after the secondary rectification filtering by the rectification filter circuit again; the input end is provided with an input over-voltage and under-voltage protection circuit, the control circuit automatically cuts off the circuit when the input voltage is abnormal, and the control circuit automatically restores the circuit after the abnormality disappears; the output end is provided with a voltage sampling feedback circuit which detects the voltage output in real time and compensates the voltage output to ensure the stability of the output voltage; the output end is provided with an output over-voltage and under-voltage protection circuit, when the output voltage is abnormal, the control circuit automatically cuts off the circuit, and after the abnormality disappears, the control circuit automatically restores the circuit; the output end is provided with a current limiting and short-circuit protection circuit, when the output current is abnormal, the control circuit automatically cuts off the circuit, and after the abnormality disappears, the control circuit automatically restores the circuit. The high-power LED lamp has the advantages of small volume, large output power and low price, can be widely applied to other products, and has the functions of overvoltage and undervoltage protection, voltage compensation, current-limiting protection and the like.
It should be noted that the preferred embodiments of the present invention are described in the specification and the drawings, but the present invention can be realized in many different forms, and is not limited to the embodiments described in the specification, and these embodiments are not provided as additional limitations to the present invention, and are provided for the purpose of making the understanding of the disclosure of the present invention more thorough and complete. Moreover, the above features are combined with each other to form various embodiments not listed above, and all of them are considered as the scope of the present invention described in the specification; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A direct current switching power supply circuit, comprising:
the EMI circuit is used for receiving the alternating current signal and filtering a high-frequency interference signal in the alternating current signal;
the first rectifying and filtering circuit is connected with the EMI circuit and converts alternating current passing through the EMI circuit into direct current;
the power conversion circuit is connected with the first rectification filter circuit and is used for performing power conversion on the electric signal passing through the first rectification filter circuit;
the second rectifying and filtering circuit is connected with the power conversion circuit and converts the alternating current signal passing through the second rectifying and filtering circuit into a direct current signal;
the direct current output module outputs the electric signal passing through the second rectifying and filtering circuit;
and the input over-voltage and under-voltage protection circuit is connected with the first rectification filter circuit and is used for detecting whether the electric signal passing through the first rectification filter circuit is abnormal or not, and if the electric signal is detected to be abnormal, an interrupt signal is sent out.
2. The direct current switching power supply circuit according to claim 1, characterized by further comprising:
and the control circuit is respectively connected with the input over-voltage and under-voltage protection circuit, the control circuit and the output module and receives an electric signal passing through the input over-voltage and under-voltage protection circuit or the output module.
3. The direct-current switching power supply circuit according to claim 1 or 2, wherein the output module further includes: the circuit comprises a direct current output circuit, a current-limiting protection circuit, an output over-voltage and under-voltage protection circuit, a voltage sampling circuit, a short-circuit protection circuit and a voltage stabilizing loop circuit.
4. The direct current switching power supply circuit according to claim 3,
the current-limiting protection circuit, the output over-voltage and under-voltage protection circuit, the voltage sampling circuit and the short-circuit protection circuit are respectively connected with the direct current output circuit, and the direct current output circuit is connected with the second rectification filter circuit.
5. The DC switching power supply circuit according to claim 4, wherein the DC output circuit receives the DC signal from the second rectifying and filtering circuit and outputs the DC signal.
6. The direct current switching power supply circuit according to claim 4,
the current-limiting protection circuit receives the electric signal passing through the direct current output circuit and is used for limiting the current in the circuit from being overlarge;
and the output over-voltage and under-voltage protection circuit receives the electrical signal passing through the direct current output circuit and is used for detecting whether the electrical signal passing through the direct current output circuit is abnormal or not, and if the electrical signal passing through the direct current output circuit is detected to be abnormal, an interrupt signal is sent out.
7. The direct current switching power supply circuit according to claim 6,
the voltage sampling circuit receives the electric signal of the direct current output circuit, acquires the electric signal from the direct current output circuit, detects the voltage value of the direct current output circuit, compensates and ensures the stability of the output voltage;
and the short-circuit protection circuit receives the electric signal of the direct current output circuit, and sends a cutting-off signal to cut off the circuit when detecting that the short-circuit current generated in the circuit loop is overlarge.
8. The DC switching power supply circuit according to claim 3, wherein the current limiting protection circuit, the output over-voltage and under-voltage protection circuit and the short-circuit protection circuit are respectively connected with the control circuit.
9. The DC switching power supply circuit according to claim 3, wherein the voltage regulator circuit is connected to the voltage sampling circuit and then to the control circuit.
10. The dc switching power supply circuit of claim 9, wherein the voltage regulator circuit obtains the electrical signal from the voltage sampling circuit to dynamically adjust the voltage so that the output voltage is a stable value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621303824.7U CN206226307U (en) | 2016-11-30 | 2016-11-30 | A kind of direct-current switch power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621303824.7U CN206226307U (en) | 2016-11-30 | 2016-11-30 | A kind of direct-current switch power supply circuit |
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| Publication Number | Publication Date |
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| CN206226307U true CN206226307U (en) | 2017-06-06 |
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| CN201621303824.7U Active CN206226307U (en) | 2016-11-30 | 2016-11-30 | A kind of direct-current switch power supply circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911013A (en) * | 2017-12-11 | 2018-04-13 | 成都互聚科技有限公司 | A kind of regulated power supply system with multi-protective function |
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2016
- 2016-11-30 CN CN201621303824.7U patent/CN206226307U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911013A (en) * | 2017-12-11 | 2018-04-13 | 成都互聚科技有限公司 | A kind of regulated power supply system with multi-protective function |
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Effective date of registration: 20210826 Address after: 518000 No.3 Factory, Qiaotou Fuqiao Industrial Zone, Fuyong Town, Bao'an District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN EVERWIN PRECISION TECHNOLOGY Co.,Ltd. Address before: 518000 2nd floor, building 25, Zhiheng Industrial Park, nantouguankou 2nd Road, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN BELLSING ACOUSTIC TECHNOLOGY Co.,Ltd. |