CN219678329U - Switching power supply circuit - Google Patents
Switching power supply circuit Download PDFInfo
- Publication number
- CN219678329U CN219678329U CN202320992406.7U CN202320992406U CN219678329U CN 219678329 U CN219678329 U CN 219678329U CN 202320992406 U CN202320992406 U CN 202320992406U CN 219678329 U CN219678329 U CN 219678329U
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- gallium nitride
- power supply
- nitride transistor
- resistor
- ntc resistor
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- 229910002601 GaN Inorganic materials 0.000 claims abstract description 112
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000003990 capacitor Substances 0.000 claims abstract description 31
- 238000010586 diagram Methods 0.000 description 7
- 230000000087 stabilizing effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The switching power supply circuit provided by the embodiment of the utility model comprises an NTC resistor, a gallium nitride transistor control module and an electrolytic capacitor. The NTC resistor is connected in parallel with the gallium nitride transistor control module and then connected in series with the electrolytic capacitor, and the NTC resistor and the electrolytic capacitor are respectively and electrically connected with the positive electrode end and the negative electrode end of the direct current power supply signal. When the NTC resistor is not needed, the gallium nitride transistor is turned on, the on-resistance of the gallium nitride transistor is small, and the output current enters the post-stage circuit based on the path which can completely pass through the gallium nitride transistor control module, so that the NTC resistor is in an approximate short-circuit state, the power consumption of the NTC resistor can be reduced, and the technical problems of high power consumption and high temperature caused by the NTC resistor which is arranged by solving the surge phenomenon of the switching power supply circuit are solved.
Description
Technical Field
The utility model relates to the field of emergency protection circuits, in particular to a switching power supply circuit.
Background
In a switching power supply circuit, there is a surge phenomenon. Specifically, the surge phenomenon is an instantaneous overvoltage exceeding the normal operating voltage. Essentially, the surge phenomenon is a sharp pulse that occurs in only a few parts per million of time.
The prior art generally strings NTC resistors into a switching power supply circuit to suppress the surge phenomenon. However, it is not generally considered that the NTC resistor is short-circuited after the power supply is operated, and the NTC resistor generates a larger power loss and a higher temperature during operation, thereby causing power consumption and temperature increase of the switching power supply circuit.
Therefore, how to provide a switching power supply circuit, which can solve the surge phenomenon without causing power consumption and temperature increase of the switching power supply circuit is a problem to be solved at present.
Disclosure of Invention
The embodiment of the utility model aims to solve the technical problems that the power consumption and the temperature of a switching power supply circuit are increased due to the fact that the conventional switching power supply circuit is used for solving the surge phenomenon.
The embodiment of the utility model provides a switching power supply circuit which comprises an NTC resistor, a gallium nitride transistor control module and an electrolytic capacitor; wherein,,
the NTC resistor is connected in parallel with the gallium nitride transistor control module and then connected in series with the electrolytic capacitor, the NTC resistor and the electrolytic capacitor are respectively and electrically connected with the positive electrode terminal and the negative electrode terminal of the direct current power supply signal, and the gallium nitride transistor control module is used for short-circuiting the NTC resistor so as to reduce the power consumption of the NTC resistor.
The switching power supply circuit further comprises a rectifier bridge circuit module, wherein an alternating current signal end of the rectifier bridge circuit module is electrically connected with an alternating current power supply signal output end, a direct current power supply signal positive end of the rectifier bridge circuit module is electrically connected with a positive electrode end of the electrolytic capacitor, a direct current power supply signal negative end of the rectifier bridge circuit module is electrically connected with the NTC resistor, and the rectifier bridge circuit module is used for converting an alternating current signal output by the alternating current power supply signal into a direct current signal and outputting the direct current signal to the NTC resistor and the electrolytic capacitor.
In the switching power supply circuit of the present utility model, the gallium nitride transistor control module is electrically connected with the positive terminal of the dc power supply signal, and the gallium nitride transistor control module is configured to short-circuit the NTC resistor under the control of the dc power supply signal, so as to reduce the power consumption of the NTC resistor.
In the switching power supply circuit of the present utility model, the gallium nitride transistor control module includes a gallium nitride transistor, a first resistor and a second resistor, wherein a source electrode and a drain electrode of the gallium nitride transistor are respectively and electrically connected with two ends of the NTC resistor, a gate electrode of the gallium nitride transistor is electrically connected with a positive electrode of a direct current power supply signal of the rectifier bridge circuit module through the first resistor, and a gate electrode of the gallium nitride transistor is electrically connected with a source electrode of the gallium nitride transistor through the second resistor.
In the switching power supply circuit of the present utility model, a voltage regulator is disposed between the first resistor and the positive terminal of the dc power supply signal of the rectifier bridge circuit module.
In the switching power supply circuit of the present utility model, the gallium nitride transistor control module is further connected to a control signal, and the gallium nitride transistor control module is configured to short-circuit the NTC resistor under the control of the control signal, so as to reduce the power consumption of the NTC resistor.
In the switching power supply circuit of the present utility model, the gallium nitride transistor control module includes a gallium nitride transistor, a first resistor and a second resistor, wherein a source electrode and a drain electrode of the gallium nitride transistor are respectively connected with two ends of the NTC resistor, a gate electrode of the gallium nitride transistor is connected with the control signal, and a gate electrode of the gallium nitride transistor is electrically connected with a source electrode of the gallium nitride transistor through the second resistor.
In the switching power supply circuit of the present utility model, the rectifier bridge circuit module includes a first diode, a second diode, a third diode and a fourth diode, which are sequentially connected end to end, wherein the cathode of the first diode is electrically connected with the anode of the second diode, the cathode of the second diode is electrically connected with the cathode of the third diode, the anode of the third diode is electrically connected with the cathode of the fourth diode, and the anode of the fourth diode is electrically connected with the cathode of the first diode.
In the switching power supply circuit of the utility model, a fuse is arranged between the alternating current power supply signal output end and the rectifier bridge circuit module.
The embodiment of the utility model also provides gallium nitride dynamic test equipment, the gallium nitride transistor control module comprises a gallium nitride transistor, a grid electrode of the gallium nitride transistor is connected with a control signal, a source electrode and a drain electrode of the gallium nitride transistor are respectively and electrically connected with two ends of the NTC resistor, and the source electrode of the gallium nitride transistor is also electrically connected with the anode of the electrolytic capacitor.
The switching power supply circuit provided by the embodiment of the utility model comprises an NTC resistor, a gallium nitride transistor control module and an electrolytic capacitor. The NTC resistor is connected in parallel with the gallium nitride transistor control module and then connected in series with the electrolytic capacitor, and the NTC resistor and the electrolytic capacitor are respectively and electrically connected with the positive electrode end and the negative electrode end of the direct current power supply signal. When the NTC resistor is not needed, the gallium nitride transistor is turned on, the on-resistance of the gallium nitride transistor is small, and the output current enters the post-stage circuit based on the path which can completely pass through the gallium nitride transistor control module, so that the NTC resistor is in an approximate short-circuit state, the power consumption of the NTC resistor can be reduced, and the technical problems of high power consumption and high temperature caused by the NTC resistor which is arranged by solving the surge phenomenon of the switching power supply circuit are solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a switching power supply circuit according to an embodiment of the present utility model.
Fig. 2 is a schematic diagram of a first circuit of a switching power supply circuit according to an embodiment of the present utility model.
Fig. 3 is a second circuit schematic diagram of the switching power supply circuit according to the embodiment of the present utility model.
Fig. 4 is a schematic diagram of a third circuit of the switching power supply circuit according to the embodiment of the present utility model.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a switching power supply circuit according to an embodiment of the utility model. As shown in fig. 1, the switching power supply circuit 10 provided in the embodiment of the present utility model includes an NTC resistor 101, a gallium nitride transistor control module 102, and an electrolytic capacitor E-cap. The NTC resistor 101 and the GaN transistor control module 102 are connected in parallel and then connected in series with the electrolytic capacitor E-cap, and the NTC resistor 101 and the electrolytic capacitor E-cap are respectively and electrically connected with the positive electrode terminal and the negative electrode terminal of the direct current power supply signal.
The gan transistor control module 102 is configured to short-circuit the NTC resistor 101 to reduce power consumption of the NTC resistor 101. When the NTC resistor 101 is not needed, the GaN transistor GaN may be turned on, but the on-resistance of the GaN transistor GaN is very small, generally several hundred mΩ or less, and the output current enters the post-stage circuit based on the path that may all pass through the GaN transistor control module 102, so that the NTC resistor 101 is in an approximately short-circuited state, thereby reducing the power consumption of the NTC resistor 101, and solving the technical problems of high temperature and power consumption caused by the NTC resistor 101 that is set by the switching power supply circuit because of solving the surge phenomenon.
Referring to fig. 2, fig. 2 is a schematic diagram of a first circuit of a switching power supply circuit according to an embodiment of the utility model. As shown in fig. 2, the switching power supply circuit 10 provided in the embodiment of the present utility model further includes a rectifier bridge circuit module 103. The alternating current signal end of the rectifier bridge circuit module 103 is electrically connected with the alternating current power supply signal output end, the direct current power supply signal positive end of the rectifier bridge circuit module 103 is electrically connected with the positive electrode end of the electrolytic capacitor, and the direct current power supply signal negative end of the rectifier bridge circuit module 103 is electrically connected with the NTC resistor 101.
The rectifier bridge circuit module 103 is configured to convert an ac signal output by an ac power signal into a dc signal, and output the dc signal to the NTC resistor 101 and the electrolytic capacitor E-cap. It should be noted that, in the existing factory, the power source used is generally ac power, and in order to meet the requirements of the subsequent working devices, the rectifier bridge circuit module 103 is generally required to convert the ac electric signal into a stable dc electric signal.
The gan transistor control module 102 is electrically connected to the positive terminal of the dc power signal. The gallium nitride transistor control module 102 is configured to short-circuit the NTC resistor 101 under the control of the dc power signal, so as to reduce the power consumption of the NTC resistor.
Specifically, the GaN transistor control module 102 includes a GaN transistor GaN, a first resistor R1, and a second resistor R2, where a source S and a drain D of the GaN transistor GaN are electrically connected to two ends of the NTC resistor, respectively, a gate G of the GaN transistor GaN is electrically connected to a positive terminal of the dc power signal of the rectifier bridge circuit module 103 through the first resistor R1, and the gate G of the GaN transistor GaN is electrically connected to the source S of the GaN transistor GaN through the second resistor R2.
A voltage regulator ZD is disposed between the first resistor R1 and the positive terminal of the dc power signal of the rectifier bridge circuit module 103.
It should be noted that, when an ac power signal is input, the input voltage charges the electrolytic capacitor E-cap through the rectifier bridge circuit module 103 and the NTC resistor 101, and the charging current is limited to a small value due to the resistance of the NTC resistor 101 because the resistance of the NTC resistor 101 is generally 3 Ω or more, so that a large electric spark is not generated at the moment of power-on, thereby solving the surge phenomenon of the existing switching power circuit. In addition, when the input end is completely connected to the power grid or the socket, the voltage of the electrolytic capacitor E-cap is charged to exceed the voltage stabilizing value of the voltage stabilizing tube ZD, the first resistor R1 and the second resistor R2 play a role in voltage division, when the voltage of the second resistor R2 reaches the starting voltage of the GaN transistor GaN, the GaN transistor GaN is conducted, so that the NTC resistor 101 is short-circuited, the input current does not flow through the NTC resistor 101 any more, the capacitor E-cap and a following circuit are powered through the GaN transistor GaN, the circuit is started, and therefore the NTC resistor 101 does not generate particularly high power consumption, and the temperature and efficiency problems brought by the NTC resistor 101 are completely solved.
The rectifier bridge circuit module 103 includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4, which are sequentially connected end to end, where a cathode of the first diode D1 is electrically connected to an anode of the second diode D2, an anode of the second diode D3 is electrically connected to a cathode of the third diode D4, an anode of the third diode D3 is electrically connected to an anode of the fourth diode D4, and an anode of the fourth diode D4 is electrically connected to an anode of the first diode D1.
It should be noted that, the rectifier bridge circuit module 103 may also use other rectifier circuits. The embodiments of the present utility model are not particularly limited herein.
A Fuse is disposed between the ac power signal output terminal and the rectifier bridge circuit module 103. It should be noted that, through setting up Fuse, can in time break off the circuit when the abnormal condition appears in the follow-up, avoid the circuit damage.
It should be noted that, the component parameters of the switching power supply circuit 10 provided by the embodiment of the present utility model are determined by the specific requirements of the switching power supply circuit 10 provided by the embodiment of the present utility model. Specifically, the regulated value of the regulator tube ZD is typically 90% of the peak voltage of the input voltage. For example, the input voltage is 90V/50Hz, and the voltage stabilizing value of the voltage stabilizing tube ZD isIn addition, the first resistor R1 and the second resistor R2 are arranged in series, so that the current of the zener diode ZD needs to be limited in a stable current range, and the voltage of the second resistor R2 needs to make the GaN transistor fully saturated and conductive. Therefore, the resistance of the second resistor R2 is based on the threshold of GaNThe voltage is determined.
Referring to fig. 3, fig. 3 is a second circuit schematic of the switching power supply circuit according to the embodiment of the utility model. The switching power supply circuit 10 shown in fig. 3 differs from the switching power supply circuit 10 shown in fig. 2 in that: the gan transistor control module 102 is further connected to a control signal scan, and the gan transistor control module 102 is configured to short-circuit the NTC resistor 101 under the control of the control signal scan, so as to reduce the power consumption of the NTC resistor 101.
Specifically, the GaN transistor control module 102 includes a GaN transistor GaN, a first resistor R1, and a second resistor R2, where a source S and a drain D of the GaN transistor GaN are respectively connected to two ends of the NTC resistor 101, a gate G of the GaN transistor GaN is connected to a control signal scan, and the gate G of the GaN transistor GaN is electrically connected to the source S of the GaN transistor GaN through the second resistor R2.
It should be noted that, in order to better achieve the effect of reducing the power consumption of the NTC resistor 101, a self-control method may be not adopted, but a control signal scan is provided, when the NTC resistor 101 is not needed, the GaN transistor is turned on, so that the NTC resistor 101 is short-circuited, the input current no longer flows through the NTC resistor 101, but the GaN transistor is used to supply power to the capacitor E-cap and the following circuits, and the circuit is started, so that no particularly high power consumption is generated by the NTC resistor 101, and the temperature and efficiency problems caused by the NTC resistor 101 are completely solved.
It should be noted that the control signal scan may be provided by other circuit control methods, such as a voltage signal of the MCU or other control circuits.
Referring to fig. 4, fig. 4 is a schematic diagram of a third circuit of the switching power supply circuit according to the embodiment of the utility model. The switching power supply circuit 10 shown in fig. 4 differs from the switching power supply circuit 10 shown in fig. 2 in that: the GaN transistor control module 102 includes a GaN transistor GaN, a gate G of the GaN transistor GaN is connected to a control signal scan, a source S and a drain D of the GaN transistor GaN are electrically connected to two ends of the NTC resistor 101, respectively, and the source S of the GaN transistor GaN is also electrically connected to an anode of the electrolytic capacitor E-cap.
It should be noted that, the switching power supply circuit 10 provided in the embodiment of the present utility model may also be used to access a dc voltage source, rather than an ac voltage source.
The switching power supply circuit provided by the embodiment of the utility model comprises an NTC resistor, a gallium nitride transistor control module and an electrolytic capacitor. The NTC resistor is connected in parallel with the gallium nitride transistor control module and then connected in series with the electrolytic capacitor, and the NTC resistor and the electrolytic capacitor are respectively and electrically connected with the positive electrode end and the negative electrode end of the direct current power supply signal. When the NTC resistor is not needed, the gallium nitride transistor is turned on, the on-resistance of the gallium nitride transistor is small, and the output current enters the post-stage circuit based on the path which can completely pass through the gallium nitride transistor control module, so that the NTC resistor is in an approximate short-circuit state, the power consumption of the NTC resistor can be reduced, and the technical problems of high power consumption and high temperature caused by the NTC resistor which is arranged by solving the surge phenomenon of the switching power supply circuit are solved.
The above description has been made in detail of a switching power supply circuit provided by the embodiment of the present utility model, and specific examples are applied herein to illustrate the principles and embodiments of the present utility model, and the above description of the embodiment is only for helping to understand the method and core ideas of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.
Claims (10)
1. The switching power supply circuit is characterized by comprising an NTC resistor, a gallium nitride transistor control module and an electrolytic capacitor; wherein,,
the NTC resistor is connected in parallel with the gallium nitride transistor control module and then connected in series with the electrolytic capacitor, the NTC resistor and the electrolytic capacitor are respectively and electrically connected with the positive electrode terminal and the negative electrode terminal of the direct current power supply signal, and the gallium nitride transistor control module is used for short-circuiting the NTC resistor so as to reduce the power consumption of the NTC resistor.
2. The switching power supply circuit according to claim 1, further comprising a rectifier bridge circuit module, wherein an ac power signal end of the rectifier bridge circuit module is electrically connected to an ac power signal output end, a dc power signal positive end of the rectifier bridge circuit module is electrically connected to a positive end of the electrolytic capacitor, a dc power signal negative end of the rectifier bridge circuit module is electrically connected to the NTC resistor, and the rectifier bridge circuit module is configured to convert an ac power signal output by the ac power signal into a dc power signal, and output the dc power signal to the NTC resistor and the electrolytic capacitor.
3. The switching power supply circuit according to claim 2, wherein the gallium nitride transistor control module is electrically connected to the positive terminal of the dc power supply signal, and the gallium nitride transistor control module is configured to short-circuit the NTC resistor under the control of the dc power supply signal, so as to reduce power consumption of the NTC resistor.
4. A switching power supply circuit according to claim 3, wherein the gallium nitride transistor control module comprises a gallium nitride transistor, a first resistor and a second resistor, a source and a drain of the gallium nitride transistor are respectively electrically connected with two ends of the NTC resistor, a gate of the gallium nitride transistor is electrically connected with a positive terminal of a direct current power supply signal of the rectifier bridge circuit module through the first resistor, and a gate of the gallium nitride transistor is electrically connected with a source of the gallium nitride transistor through the second resistor.
5. The switching power supply circuit according to claim 4, wherein a voltage regulator tube is provided between the first resistor and a positive terminal of the direct current power supply signal of the rectifier bridge circuit module.
6. The switching power supply circuit according to claim 2, wherein the gallium nitride transistor control module is further connected to a control signal, and the gallium nitride transistor control module is configured to short-circuit the NTC resistor under the control of the control signal, so as to reduce power consumption of the NTC resistor.
7. The switching power supply circuit according to claim 6, wherein the gallium nitride transistor control module comprises a gallium nitride transistor, a first resistor and a second resistor, wherein a source electrode and a drain electrode of the gallium nitride transistor are respectively connected with two ends of the NTC resistor, a gate electrode of the gallium nitride transistor is connected with the control signal, and a gate electrode of the gallium nitride transistor is electrically connected with a source electrode of the gallium nitride transistor through the second resistor.
8. The switching power supply circuit according to claim 2, wherein the rectifier bridge circuit module includes a first diode, a second diode, a third diode, and a fourth diode connected end to end in this order, a cathode of the first diode is electrically connected to an anode of the second diode, a cathode of the second diode is electrically connected to a cathode of the third diode, an anode of the third diode is electrically connected to a cathode of the fourth diode, and an anode of the fourth diode is electrically connected to a cathode of the first diode.
9. The switching power supply circuit according to claim 2, wherein a fuse is provided between the ac power signal output terminal and the rectifier bridge circuit module.
10. The switching power supply circuit according to claim 2, wherein the gallium nitride transistor control module comprises a gallium nitride transistor, a gate of the gallium nitride transistor is connected to a control signal, a source and a drain of the gallium nitride transistor are respectively electrically connected to two ends of the NTC resistor, and a source of the gallium nitride transistor is further electrically connected to an anode of the electrolytic capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320992406.7U CN219678329U (en) | 2023-04-24 | 2023-04-24 | Switching power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320992406.7U CN219678329U (en) | 2023-04-24 | 2023-04-24 | Switching power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219678329U true CN219678329U (en) | 2023-09-12 |
Family
ID=87896709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320992406.7U Active CN219678329U (en) | 2023-04-24 | 2023-04-24 | Switching power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219678329U (en) |
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2023
- 2023-04-24 CN CN202320992406.7U patent/CN219678329U/en active Active
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