CN113036896A - Power supply circuit and power supply device - Google Patents
Power supply circuit and power supply device Download PDFInfo
- Publication number
- CN113036896A CN113036896A CN201911350499.8A CN201911350499A CN113036896A CN 113036896 A CN113036896 A CN 113036896A CN 201911350499 A CN201911350499 A CN 201911350499A CN 113036896 A CN113036896 A CN 113036896A
- Authority
- CN
- China
- Prior art keywords
- energy storage
- unit
- module
- power supply
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The embodiment of the disclosure provides a power supply circuit, which comprises an input end used for connecting a direct current power supply, an output end used for connecting a load, an energy storage unit, a switch unit and a switch control unit; the switch unit is connected between the energy storage unit and the output end; the energy storage unit is connected with the input end and the switch unit, and is used for storing energy when the direct-current power supply supplies power and supplying power to the output end through the switch unit when the switch unit is switched on; the switch control unit is connected with the input end and the switch unit and is used for controlling the switch unit to be conducted when the direct-current power supply is powered off so that the energy storage unit supplies power to the output end through the switch unit; wherein, the switch unit is an NMOS tube. The embodiment of the disclosure also provides a power supply device.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of power supplies, in particular to a power supply circuit and a power supply device.
Background
In a communication device powered by a dc power supply, if the input of the dc power supply is powered off, it is desirable that the power supply circuit keeps outputting for a period of time without power down so that the load can continue to work after the dc power supply is powered off.
Generally, a large-capacity capacitor is arranged in a power supply circuit, the large-capacity capacitor stores energy when a direct-current power supply supplies power, the stored energy is used for supplying power to a load when the direct-current power supply is cut off so that the load can work continuously, but useless power consumption generated by the power supply circuit when the large-capacity capacitor supplies power is large, and the problem is more obvious when the load has large power, so that the requirement of uninterrupted power supply of a high-power load cannot be met.
Disclosure of Invention
The embodiment of the disclosure provides a power supply circuit and a power supply device.
In a first aspect, an embodiment of the present disclosure provides a power supply circuit, including an input terminal for connecting a dc power supply, an output terminal for connecting a load, an energy storage unit, a switch unit, and a switch control unit; wherein the content of the first and second substances,
the switch unit is connected between the energy storage unit and the output end;
the energy storage unit is connected with the input end and the switch unit, and is used for storing energy when the direct-current power supply supplies power and supplying power to the output end through the switch unit when the switch unit is switched on;
the switch control unit is connected with the input end and the switch unit and is used for controlling the switch unit to be conducted when the direct-current power supply is powered off so that the energy storage unit supplies power to the output end through the switch unit;
wherein, the switch unit is an NMOS tube.
In some embodiments, the switch control unit comprises a sampling module, a driving energy storage module and a switch module; wherein the content of the first and second substances,
the switch module is connected between the driving energy storage module and the grid electrodes of the switch unit;
the driving energy storage module is connected with a driving energy storage end and the switch module, and is used for storing energy when the direct-current power supply supplies power, and supplying power to the grid electrode of the switch unit through the switch module when the switch module is switched on so as to drive the switch unit to be switched on;
the sampling module is connected with the input end and the switch module and used for controlling the switch module to be switched on when the direct-current power supply is powered off so that the driving energy storage module supplies power to the grid electrode of the switch unit through the switch module.
In some embodiments, the input comprises a positive input for connecting a positive pole of the dc power source and a negative input for connecting a negative pole of the dc power source;
the first end of the energy storage unit is connected with the positive input end and the switch unit, and the second end of the energy storage unit is connected with the negative input end;
the first end of the driving energy storage module is connected with the driving energy storage end and the switch module, and the second end of the driving energy storage module is connected with the negative electrode input end.
In some embodiments, the circuit further comprises a boost unit;
the boosting unit is connected between the positive input end and the energy storage unit and used for boosting a signal from the positive input end.
In some embodiments, the driving energy storage end is one end of the boosting unit connected with the energy storage unit.
In some embodiments, the circuit further comprises a forward current anti-kickback unit;
the forward current anti-reverse unit is connected between the positive input end and the energy storage unit.
In some embodiments, the circuit further comprises a chip;
the chip is connected with the positive input end, the forward current anti-reverse unit and the driving energy storage end and used for providing a conduction signal for the forward current anti-reverse unit.
In some embodiments, the switch control unit further comprises a drive module;
the driving module is connected between the driving energy storage end and the driving energy storage module and used for supplying power to the driving energy storage module when the direct-current power supply supplies power.
In some embodiments, the driving module is a diode, and a first pole of the NMOS diode is connected to the driving energy storage terminal and a second pole of the NMOS diode is connected to the driving energy storage module.
In a second aspect, an embodiment of the present disclosure provides a power supply apparatus, including:
a direct current power supply;
the power supply circuit is provided.
The power supply circuit provided by the embodiment of the disclosure can supply power to a load when a direct current power supply is powered off, so that the power supply reliability is improved, and useless power consumption is low, so that the power supply time can be prolonged, and the requirement of uninterrupted power supply of a high-power load is met.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure and not to limit the disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:
fig. 1 is a block diagram of a power supply circuit according to an embodiment of the present disclosure;
fig. 2 is a circuit diagram of a power supply circuit according to an embodiment of the disclosure;
fig. 3 is a circuit diagram of another power supply circuit provided in the embodiments of the present disclosure;
fig. 4 is a circuit diagram of another power supply circuit provided in the embodiments of the present disclosure;
fig. 5 is a circuit diagram of another power supply circuit provided in the embodiments of the present disclosure;
fig. 6 is a circuit diagram of another power supply circuit provided in the embodiments of the present disclosure;
fig. 7 is a block diagram of a power supply device according to an embodiment of the disclosure;
wherein the reference numerals are: 1. a surge protection unit; 2. a forward current anti-reverse unit; 3. a voltage boosting unit; 4. an energy storage unit; 5. a switch unit; 6. a switch control unit; 61. a sampling module; 62. driving the energy storage module; 63. a switch module; 64. a drive module; 7. an output filtering unit; 8. a load unit; 9. driving the energy storage end; FV1, a first voltage limiting surge protector; FU1, first fuse; c1, a first capacitance; c2, a second capacitor; c3, a third capacitance; c4, a fourth capacitance; VD1, a first diode; VD2, second diode; VD3, third diode; VD4, fourth diode; VT1, a first NMOS transistor; VT2, a second NMOS transistor; VT3 and a third NMOS tube; VT4 and a fourth NMOS tube; VT5 and a fifth NMOS tube; VT6 and a sixth NMOS tube; r1, a first resistor; r2, a second resistor; r3, third resistor; r4, fourth resistor; r5, fifth resistor; r6, sixth resistor; r7, seventh resistor; r8, eighth resistor; r9, ninth resistor; r10, tenth resistor; d1, a first chip; d2, a second chip; l1, first inductance.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the embodiments of the present disclosure, the power supply circuit and the power supply apparatus provided in the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The disclosed embodiments will be described more fully hereinafter with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth in the disclosure. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Embodiments of the present disclosure may be described with reference to plan and/or cross-sectional views in light of idealized schematic illustrations of the present disclosure. Accordingly, the example illustrations can be modified in accordance with manufacturing techniques and/or tolerances.
Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure, the term "and/or" includes any and all combinations of one or more of the associated listed items. As used in this disclosure, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "made from … …," as used in this disclosure, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Unless otherwise defined, all terms (including technical and scientific terms) used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The disclosed embodiments are not limited to the embodiments shown in the drawings, but include modifications of configurations formed based on a manufacturing process. Thus, the regions illustrated in the figures have schematic properties, and the shapes of the regions shown in the figures illustrate specific shapes of regions of elements, but are not intended to be limiting.
In a first aspect, referring to fig. 1 to 6, an embodiment of the present disclosure provides a power supply circuit.
The power supply circuit provided by the embodiment of the disclosure is connected between the direct-current power supply and the load, and can continuously supply power to the load when the direct-current power supply is powered off, so that the power supply reliability is improved.
The power supply circuit of the embodiment of the present disclosure specifically includes an input end for connecting a dc power supply, an output end for connecting a load (i.e., a load unit 8), an energy storage unit 4, a switch unit 5, and a switch control unit 6; wherein the content of the first and second substances,
the switch unit 5 is connected between the energy storage unit 4 and the output end;
the energy storage unit 4 is connected with the input end and the switch unit 5, is used for storing energy when the direct-current power supply supplies power, and supplies power to the output end through the switch unit 5 when the switch unit 5 is switched on;
the switch control unit 6 is connected with the input end and the switch unit 5 and is used for controlling the switch unit 5 to be conducted when the direct-current power supply is powered off so that the energy storage unit 4 supplies power to the output end through the switch unit 5;
the switch unit 5 is an NMOS transistor.
In the power supply circuit of the embodiment of the present disclosure, the energy storage unit 4 may store energy when the dc power supply is powered on, and when the dc power supply is powered off, the switch control unit 6 controls the switch unit 5 to be turned on, so that the energy storage unit 4 can be turned on with the load unit 8 through the switch unit 5, and the energy stored therein is used to maintain the power supply for the load unit 8 for a certain time.
Compared with PMOS tubes used in some related technologies, the NMOS tube has smaller resistance, so that under the condition of supplying power to the same load, the power consumption (heat consumption) of the NMOS tube is smaller, namely the useless power consumption of the power supply circuit is smaller.
In some embodiments, referring to fig. 1 to 6, the switching control unit 6 comprises a sampling module 61, a driving energy storage module 62, a switching module 63; wherein the content of the first and second substances,
a switching module 63 connected between the driving energy storage module 62 and the gate of the switching unit 5;
the driving energy storage module 62 is connected with the driving energy storage end 9 and the switch module 63, and is used for storing energy when the direct-current power supply supplies power, and providing voltage for the grid of the switch unit 5 through the switch module 63 when the switch module 63 is switched on so as to drive the switch unit 5 to be switched on;
and the sampling module 61 is connected with the input end and the switch module 63, and is used for controlling the switch module 63 to be switched on when the direct-current power supply is powered off, so that the driving energy storage module 62 can provide voltage for the gate of the switch unit 5 through the switch module 63.
Compared with the PMOS transistor used as the switch unit in some related technologies, the NMOS transistor requires the gate-source voltage to be positive to turn on, i.e., requires a higher gate voltage to turn on. Therefore, the driving energy storage module 62 can be arranged, the driving energy storage module 62 also stores energy when the direct-current power supply is powered on, and when the direct-current power supply is powered off, the sampling module 63 collects signals of the power off, so that the switching module 63 is controlled to be switched on, the driving energy storage module 62 can supply power to the grid electrode of the switching unit 5 through the switching module 63, and the switching unit 5 is kept in a conducting state when the direct-current power supply is powered off.
In some prior arts, the conduction of the switch unit 5 is achieved through the energy storage unit 4, which results in that the energy storage unit 4 must use part of the energy to keep the switch unit 5 conductive, while the power supply circuit provided by the embodiment of the invention keeps the switch unit 5 conductive through independently driving the energy storage module 62, so that the energy storage unit 4 can supply more energy to the load unit 8.
In some embodiments, referring to fig. 1-6, the inputs include a positive input for connecting a positive pole of a dc power source and a negative input for connecting a negative pole of the dc power source.
The first end of the energy storage unit 4 is connected with the positive input end and the switch unit 5, and the second end of the energy storage unit is connected with the negative input end;
the first end of the driving energy storage module 62 is connected to the driving energy storage end 9 and the switch module 63, and the second end thereof is connected to the negative input end.
That is, the energy storage unit 4 may be connected between the positive electrode and the negative electrode of the dc power source, and one end connected to the positive electrode is also connected to the switch unit 5.
Similarly, the driving energy storage module 62 is also connected to the negative electrode of the dc power supply at one end, and connected to the switching module 63 at the other end, and also connected to the driving energy storage terminal 9 (which may be connected to different devices, which will be described in detail below).
In some embodiments, referring to fig. 1 to 6, the power supply circuit further includes a boosting unit 3;
and the boosting unit 3 is connected between the positive input end and the energy storage unit 4 and used for boosting the signal from the positive input end and then sending the boosted signal to the energy storage unit 4 so that the energy storage unit 4 can store the signal.
Can set up before energy storage unit 4 and step up unit 3, can let the voltage of energy storage unit 4 first end rise through step up unit 3 to can save more energy, energy storage unit 4's power supply time when increasing the outage has increased the reliability of supplying power.
In some embodiments, referring to fig. 1 to 6, the driving energy storage end 9 is an end of the boosting unit 3 connected to the energy storage unit 4.
That is, the driving energy storage end 9 connected to one end of the driving energy storage unit 62 may be connected to the voltage boosting unit 3 (i.e., powered by the voltage boosting unit 3), so that the voltage transmitted to the driving energy storage module 62 is higher, and the driving energy storage module 62 may store more energy.
As before, the connection position of the driving energy storage end 9 is not limited to this, and other suitable positions may be selected according to actual conditions to supply power.
In some embodiments, referring to fig. 1 to 6, the circuit further comprises a forward current anti-kickback unit 2;
and the forward current anti-reverse unit 2 is connected between the positive input end and the energy storage unit 4.
Specifically, the reverse unit 2 is prevented in forward current and is connected before the unit 3 that steps up, and forward current prevents that the unit 2 is connected between positive input end and the unit 3 that steps up promptly in forward current, and the unit 3 that steps up is connected and is prevented between unit 2 and the energy storage unit 4 in forward current to prevent when direct current power supply cuts off the power supply, energy storage unit 4 supply current refluence.
In some embodiments, referring to fig. 1 to 6, the circuit further includes a chip, i.e., a first chip D1, connected to the positive input terminal, the forward current anti-reverse unit 2 and the driving energy storage terminal 9, for providing a conducting signal for the forward current anti-reverse unit 2.
Namely, the chip can be set to maintain the conduction of the forward current anti-reverse unit 2, and simultaneously supply power to the driving energy storage end, that is, supply power to one end of the driving energy storage module 62.
In some embodiments, referring to fig. 1-6, the switch control unit 6 further comprises a drive module 64;
and the driving module 64 is connected between the driving energy storage end 9 and the driving energy storage module 62 and used for supplying power to the driving energy storage module 62 when the direct-current power supply supplies power.
Namely, a driving module 64 can be further disposed between the driving energy storage end 9 and the driving energy storage module 62, the dc power supply works normally, that is, when power is supplied, current flows to the driving module 64 through the driving energy storage end 9 to generate driving voltage, the generated driving voltage is sent to the driving energy storage module 62, and the driving energy storage module 62 stores the driving voltage.
The driving energy storage module 62 can obtain the stored energy from the existing circuit through the driving module 64 without an additional independent circuit, so that the circuit device is less and the circuit is simple.
In some embodiments, referring to fig. 1 to 6, the driving module 64 is a diode, and a first pole thereof is connected to the driving energy storage terminal 9 and a second pole thereof is connected to the driving energy storage module 62.
The driving energy storage module 62 can be powered by the diode, so that the unidirectional property of the diode can be utilized to drive the driving energy storage module 62 to supply power when the direct current power supply is powered on, and the driving energy storage module 62 is prevented from supplying power reversely when the direct current power supply is powered off.
The working engineering of the whole power supply circuit is as follows:
when the direct current power supply supplies power, the forward current reverse prevention unit 2 can only flow forward current, the forward current reverse prevention unit 2 flows the forward current to generate driving voltage for the driving module 64, and the driving voltage generated by the driving module 64 is sent to the driving energy storage module 62 to be stored.
Meanwhile, the boosting unit 3 boosts the input voltage of the direct-current power supply, the boosted voltage is sent to the energy storage unit 4, and the NMOS is in a turn-off state when the switch unit 5 supplies power to the direct-current power supply, so that the boosted voltage is stored in the energy storage unit 4.
When the dc power supply is powered off, the sampling module 61 provides a power-off signal, the power-off signal turns on the switching module 63, and the driving voltage stored in the driving energy storage module 62 is sent to the switching unit 5 through the switching module 63, so that the switching unit 5 is in a conducting state. At this time, the energy storage unit 4 is combined with the output filtering unit 7 through the switch unit 5 to supply power to the load unit 8, so as to maintain the uninterrupted operation of the load unit 8.
In some embodiments, the specific circuit of the whole power supply circuit can be as shown in fig. 4, where + -48V represents the positive input terminal and the negative input terminal of the dc power supply, respectively, and the specific operation principle of the circuit is as follows:
when the dc power supply supplies power, the forward current reverse prevention unit 2, that is, the first NMOS transistor VT1 can only flow forward current, and the first chip D1 (for example, a driving chip) drives the first NMOS transistor VT1, so that the first NMOS transistor VT1 is in an on state. The gate-source voltage Vgs of the first NMOS transistor VT1 charges the driving energy storage module 62, i.e., the first capacitor C1, through the driving module 64, i.e., the second diode VD2, and the first capacitor C1 stores the gate-source voltage Vgs of the first NMOS transistor VT1 when the dc power is supplied. One end of the first chip D1 connected to the first NMOS transistor is a driving energy storage end 9, and the driving energy storage end 9 is also connected to the second diode VD 2.
Meanwhile, when the dc power supply supplies power, the dc power supply sends a dc voltage to the BOOST unit 3 through the third diode VD3, that is, the BOOST circuit composed of the first inductor L1, the fourth diode VD4, and the fifth NMOS transistor VT5 BOOSTs the dc voltage, and sends the boosted voltage to the energy storage unit 4, that is, the third capacitor C3, and the third capacitor C3 stores the boosted voltage, and simultaneously sends the voltage to the switching unit 5, that is, the second NMOS transistor VT 2. When the dc power is supplied, the second NMOS transistor VT2 is in an off state, so the third capacitor C3 can store the voltage.
When the dc power supply is powered off, the sampling module 61, that is, the input voltage sampling circuit composed of the eighth resistor R8, the ninth resistor R9, the tenth resistor R10, and the second chip D2, and the fourth transistor VT4 control the switch module 63 (that is, the third transistor VT3) to be turned on, and the specific process is that the input voltage sampling circuit composed of the eighth resistor R8, the ninth resistor R9, the tenth resistor R10, and the second chip D2 detects the input voltage, the input power-off signal is provided by the second chip D2 (such as a comparator), the power-off signal is sent to the fourth transistor VT4 through the seventh resistor R7, the fourth transistor VT4 is turned on, the current flowing through the sixth resistor R6 forms a low level, and the third transistor VT3 is turned on. The third transistor VT3 switches the module 63.
When the direct current power supply is powered off, the first chip D1 is also powered off, the first NMOS transistor VT1 loses a driving signal, the first NMOS transistor VT1 is turned off, energy on the fourth capacitor C4 is prevented from reversely flowing through the first NMOS transistor VT1, the second diode VD2 is prevented from reversely flowing through the first capacitor C1, the first capacitor C1 sends the originally stored driving voltage to the second NMOS transistor VT2 through the second resistor R2, the turned-on third NMOS transistor VT3 and the fifth resistor R5, and the second NMOS transistor VT2 is turned on. The second NMOS transistor VT2 that is turned on combines the energy of the third capacitor C3 with the energy of the fourth capacitor C4, i.e., the output filter unit 7, to supply the load unit 8, so as to maintain its uninterrupted operation.
The diodes in the first NMOS tube and the second NMOS tube in the circuit are parasitic diodes. The surge protection unit 1, i.e. the first voltage limiting type surge protector FV1, functions as a protection circuit, and the circuit also has a resistor for changing voltage values and other devices, such as the first resistor R1, and will not be described in detail here.
The first chip D1 driving the first NMOS transistor VT1 may be replaced by another chip or a switching power supply circuit, and may drive the first NMOS transistor VT 1.
The sampling module 61 is not limited to the current input sampling circuit, and other circuits may be used to determine whether the dc power supply is powered off. The second chip D2 may be replaced by a chip other than the comparator.
The forward current anti-reverse unit 2 (i.e., the first NMOS transistor VT1) and the switch unit 5 (i.e., the second NMOS transistor VT2) may be NMOS transistors in fig. 2, or may be devices that can implement corresponding functions, such as thyristors and switch transistors, for example, the NMOS transistor VT1 in fig. 3 without a parasitic diode.
The driving energy storage module 62 (i.e., the first capacitor C1 in fig. 2) may be an electrolytic capacitor, or may be another capacitor such as a ceramic capacitor (e.g., the first capacitor C1 in fig. 4), or may be another energy storage device other than a capacitor.
The driving module 64 (i.e. the second diode VD2 in fig. 2) may be an earphone tube, or may be a single device other than a diode, such as the NMOS tube VT6 with a parasitic diode in fig. 5.
The current-taking point of the switch module 63 (i.e., the third NMOS transistor VT3) may be, as shown in fig. 2, one end of the driving energy storage module 62 (i.e., the first capacitor C1) connected to the driving module 64. As shown in fig. 6, the fourth diode VD4 of the voltage boosting unit 3 may also be used, where the driving energy storage terminal 9 is the terminal of the voltage boosting unit 3 connected to the energy storage unit 4, that is, the driving energy storage module 62 may store the energy boosted by the voltage boosting unit 3.
In a second aspect, referring to fig. 7, an embodiment of the present disclosure provides a power supply apparatus, including:
a direct current power supply;
the power supply circuit is provided.
The direct current power supply and the power supply circuit can form an integral power supply, which is equivalent to a direct current power supply capable of supplying power to a load (especially a high-power load) when the direct current power supply is powered off and has higher power supply reliability.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.
In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation.
The present disclosure has disclosed example embodiments and, although specific terms are employed, they are used and should be interpreted in a generic and descriptive sense only and not for purposes of limitation. In some instances, features, characteristics and/or elements described in connection with a particular embodiment may be used alone or in combination with features, characteristics and/or elements described in connection with other embodiments, unless expressly stated otherwise, as would be apparent to one skilled in the art. Accordingly, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the disclosure as set forth in the appended claims.
Claims (10)
1. A power supply circuit comprises an input end for connecting a direct current power supply, an output end for connecting a load, an energy storage unit, a switch unit and a switch control unit; wherein the content of the first and second substances,
the switch unit is connected between the energy storage unit and the output end;
the energy storage unit is connected with the input end and the switch unit, and is used for storing energy when the direct-current power supply supplies power and supplying power to the output end through the switch unit when the switch unit is switched on;
the switch control unit is connected with the input end and the switch unit and is used for controlling the switch unit to be conducted when the direct-current power supply is powered off so that the energy storage unit supplies power to the output end through the switch unit;
wherein, the switch unit is an NMOS tube.
2. The circuit of claim 1, wherein the switch control unit comprises a sampling module, a driving energy storage module, a switching module; wherein the content of the first and second substances,
the switch module is connected between the driving energy storage module and the grid electrodes of the switch unit;
the driving energy storage module is connected with a driving energy storage end and the switch module, and is used for storing energy when the direct-current power supply supplies power, and supplying power to the grid electrode of the switch unit through the switch module when the switch module is switched on so as to drive the switch unit to be switched on;
the sampling module is connected with the input end and the switch module and used for controlling the switch module to be switched on when the direct-current power supply is powered off so that the driving energy storage module supplies power to the grid electrode of the switch unit through the switch module.
3. The circuit of claim 2, wherein the input includes a positive input for connecting a positive pole of the dc power source and a negative input for connecting a negative pole of the dc power source;
the first end of the energy storage unit is connected with the positive input end and the switch unit, and the second end of the energy storage unit is connected with the negative input end;
the first end of the driving energy storage module is connected with the driving energy storage end and the switch module, and the second end of the driving energy storage module is connected with the negative electrode input end.
4. The circuit of claim 3, wherein the circuit further comprises a boost unit;
the boosting unit is connected between the positive input end and the energy storage unit and used for boosting a signal from the positive input end.
5. The circuit of claim 4, wherein the driving energy storage terminal is a terminal of the boosting unit connected with the energy storage unit.
6. The circuit of claim 3, wherein the circuit further comprises a forward current anti-kickback unit;
the forward current anti-reverse unit is connected between the positive input end and the energy storage unit.
7. The circuit of claim 6, wherein the circuit further comprises a chip;
the chip is connected with the positive input end, the forward current anti-reverse unit and the driving energy storage end and used for providing a conduction signal for the forward current anti-reverse unit.
8. The circuit of claim 3, wherein the switch control unit further comprises a drive module;
the driving module is connected between the driving energy storage end and the driving energy storage module and used for supplying power to the driving energy storage module when the direct-current power supply supplies power.
9. The circuit of claim 8, wherein the driving module is a diode, a first pole of the diode is connected to the driving energy storage terminal, and a second pole of the diode is connected to the driving energy storage module.
10. A power supply device, comprising:
a direct current power supply;
the power supply circuit of any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911350499.8A CN113036896A (en) | 2019-12-24 | 2019-12-24 | Power supply circuit and power supply device |
| PCT/CN2020/138627 WO2021129663A1 (en) | 2019-12-24 | 2020-12-23 | Power supply circuit and power source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911350499.8A CN113036896A (en) | 2019-12-24 | 2019-12-24 | Power supply circuit and power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113036896A true CN113036896A (en) | 2021-06-25 |
Family
ID=76452162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911350499.8A Pending CN113036896A (en) | 2019-12-24 | 2019-12-24 | Power supply circuit and power supply device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113036896A (en) |
| WO (1) | WO2021129663A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140266070A1 (en) * | 2013-03-14 | 2014-09-18 | Zvi Kurtzman | Apparatus and Method for Enhancing Battery Life |
| CN104066222B (en) * | 2013-03-21 | 2016-09-07 | 海洋王（东莞）照明科技有限公司 | Light fixture emergency supply circuit |
| CN209823505U (en) * | 2019-06-11 | 2019-12-20 | 宁波三星医疗电气股份有限公司 | Power supply circuit and electric energy meter |
-
2019
- 2019-12-24 CN CN201911350499.8A patent/CN113036896A/en active Pending
-
2020
- 2020-12-23 WO PCT/CN2020/138627 patent/WO2021129663A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021129663A1 (en) | 2021-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2008013724A2 (en) | Improved controller for oring field effect transistor | |
| CN100559696C (en) | Motor drive circuit | |
| CN102594111A (en) | Quick discharge circuit | |
| JP2007336694A (en) | Drive circuit for insulated-gate semiconductor device | |
| JP6203020B2 (en) | Battery pack having charge / discharge switch circuit | |
| CN105981128A (en) | Latching-relay drive circuit | |
| JP4483867B2 (en) | Power supply | |
| US9788369B2 (en) | LED driver and LED driving method | |
| CN110190840A (en) | Control device | |
| JP3990421B2 (en) | Inrush current reduction circuit and electrical equipment | |
| CN205657888U (en) | Auxiliary power circuit , LED drive circuit , LED driver | |
| CN211508901U (en) | Power supply circuit and power supply device | |
| CN109980600B (en) | Negative bias protection circuit powered by TR (transmitter-receiver) component | |
| CN109347466B (en) | Switching circuit and electronic equipment | |
| CN113036896A (en) | Power supply circuit and power supply device | |
| CN108512191B (en) | Surge protection circuit, electronic equipment and surge protection method of circuit | |
| EP3070830A2 (en) | Rectifier circuit with reduced reverse recovery time | |
| CN109412422A (en) | A kind of high pressure power-supply circuit of wide scope input | |
| CN102013801B (en) | Self-bias power management integrated circuit (PMIC) chip power supply | |
| CN211530732U (en) | Power supply positive and negative polarity reverse connection preventing circuit adopting PMOS (P-channel metal oxide semiconductor) tube | |
| CN109524944B (en) | Protection circuit of direct current fan driver | |
| CN207166838U (en) | A kind of backlight constant current drive circuit | |
| CN208754024U (en) | A kind of switched charge circuit | |
| KR101228425B1 (en) | Power supply circuit for light sources, such as lighting led systems | |
| CN117767711B (en) | Unidirectional conduction circuit, bridge type driving circuit and switching power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |