CN218183250U - Power supply circuit and device - Google Patents
Power supply circuit and device Download PDFInfo
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- CN218183250U CN218183250U CN202222145652.7U CN202222145652U CN218183250U CN 218183250 U CN218183250 U CN 218183250U CN 202222145652 U CN202222145652 U CN 202222145652U CN 218183250 U CN218183250 U CN 218183250U
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Abstract
The utility model discloses a power supply circuit and device relates to the power supply technology field. The power supply circuit comprises a voltage comparison module and a control module; the input end of the voltage comparison module is connected with a power supply, the output end of the voltage comparison module is connected with the input end of the control module, and the output end of the control module is connected with a system to be powered; the voltage comparison module is used for accessing multiple voltages input by the power supply, comparing the multiple voltages and generating a control signal to the control module according to a comparison result; the control module is used for controlling multiple voltages input by the power supply to supply power to the system to be powered according to the control signal, supplying power to the system to be powered through the multiple power supplies to improve the reliability of the system, comparing the multiple voltages, and selecting corresponding voltages to supply power according to the comparison result to improve the performance of the system.
Description
Technical Field
The utility model relates to a power supply technical field especially relates to a supply circuit and device.
Background
The prior circuit design generally only supports one power supply port, so that the port can be replaced only when being damaged, and the system performance cannot be brought into play to the best because the current dual-port power supply only has a fixed power supply sequence.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a power supply circuit and device, which can solve the problem of low performance of the power supply system in the prior art.
In order to achieve the above object, the present invention provides a power supply circuit, which includes: the voltage comparison module and the control module; the input end of the voltage comparison module is connected with a power supply, the output end of the voltage comparison module is connected with the input end of the control module, and the output end of the control module is connected with a system to be powered;
the voltage comparison module is used for accessing multiple voltages input by the power supply, comparing the multiple voltages and generating a control signal to the control module according to a comparison result;
and the control module is used for controlling multiple voltages input by the power supply source to supply power to the system to be powered according to the control signal.
Optionally, the voltage comparison module includes: the voltage regulator comprises a first voltage input end, a second voltage input end, a first switch circuit and a second switch circuit, wherein the first voltage input end is respectively connected with the input end of the first switch circuit and the input end of the second switch circuit, and the second voltage input end is respectively connected with the input end of the first switch circuit and the input end of the second switch circuit; the output end of the first switch circuit and the output end of the second switch circuit are respectively connected with the control module;
the first voltage input end is used for accessing a first voltage input by the power supply;
the second voltage input end is used for accessing a second voltage input by the power supply;
the first switch circuit is used for outputting a first control signal to the control module when the first voltage is greater than the second voltage;
the second switch circuit is used for outputting a second control signal to the control module when the first voltage is greater than the second voltage;
the control module is used for controlling to output the first voltage according to the first control signal and the second control signal to supply power to the system to be powered when the first voltage is greater than the second voltage;
the first switch circuit is further configured to output a third control signal to the control module when the first voltage is less than the second voltage;
the second switch circuit is further configured to output a fourth control signal to the control module when the first voltage is lower than the second voltage;
the control module is further configured to output the second voltage according to the third control signal and the fourth control signal to supply power to the system to be powered when the first voltage is less than the second voltage;
the first switch circuit is further configured to output a fifth control signal to the control module when the first voltage is equal to the second voltage;
the second switch circuit is further configured to output a sixth control signal to the control module when the first voltage is equal to the second voltage;
the control module is further configured to output the first voltage and the second voltage according to the fifth control signal and the sixth control signal to supply power to the system to be powered when the first voltage is equal to the second voltage.
Optionally, the first switching circuit comprises: the circuit comprises a first switch tube, a second switch tube, a first resistor, a second resistor and a third resistor;
the first end of the first resistor is connected with the first voltage input end and the control module respectively, and the second end of the first resistor is connected with the input end of the first switching tube;
the control end of the first switch tube is respectively connected with the second voltage input end and the control module, and the output end of the first switch tube is respectively connected with the first end of the second resistor and the first end of the third resistor;
the second end of the second resistor is connected with the control end of the second switch tube, and the second end of the third resistor is respectively connected with the output end of the second switch tube and the control module;
the input end of the second switch tube is grounded.
Optionally, the first switch tube comprises: a first transistor, the second switch tube comprising: a second triode;
a base electrode of the first triode is respectively connected with the second voltage input end and the control module, an emitting electrode of the first triode is connected with a second end of the first resistor, and a collecting electrode of the first triode is respectively connected with a first end of the second resistor and a first end of the third resistor;
the base electrode of the second triode is connected with the second end of the second resistor, the emitting electrode of the second triode is grounded, and the collecting electrode of the second triode is respectively connected with the second end of the third resistor and the control module.
Optionally, the second switching circuit comprises: the third switching tube, the fourth resistor, the fifth resistor and the sixth resistor;
a first end of the fourth resistor is connected with the second voltage input end and the first switch circuit respectively, and a second end of the fourth resistor is connected with an input end of the third switch tube;
a control end of the third switching tube is connected with the first voltage input end, and an output end of the third switching tube is respectively connected with a first end of the fifth resistor and a first end of the sixth resistor;
a second end of the fifth resistor is connected with a control end of the fourth switching tube, and a second end of the sixth resistor is respectively connected with an output end of the fourth switching tube and the control module;
and the input end of the fourth switching tube is grounded.
Optionally, the third switching tube comprises: a third triode, the fourth switching tube comprising: a fourth triode;
a base electrode of the third triode is connected with the first voltage input end, an emitting electrode of the third triode is connected with a second end of the fourth resistor, and a collector electrode of the third triode is respectively connected with a first end of the fifth resistor and a first end of the sixth resistor;
the base electrode of the fourth triode is connected with the second end of the fifth resistor, the collector electrode of the fourth triode is respectively connected with the second end of the sixth resistor and the control module, and the emitting electrode of the fourth triode is grounded.
Optionally, the control module comprises: a first control circuit and a second control circuit; the input end of the first control circuit is connected with the output end of the first switch circuit and the second voltage input end respectively, the input end of the second control circuit is connected with the output end of the second switch circuit and the first voltage input end respectively, and the output end of the first control circuit and the output end of the second control circuit are connected with the system to be powered respectively;
the first control circuit is used for receiving the first control signal when the first voltage is greater than the second voltage and disconnecting a loop between the second voltage input end and the system to be powered according to the first control signal, and the second control circuit is used for receiving the second control signal when the first voltage is greater than the second voltage and connecting the loop between the first voltage input end and the system to be powered according to the second control signal;
the first control circuit is further configured to receive the third control signal and connect a loop between the second voltage input end and the system to be powered according to the third control signal when the first voltage is less than the second voltage, and the second control circuit is further configured to receive the fourth control signal and disconnect the loop between the first voltage input end and the system to be powered according to the fourth control signal when the first voltage is less than the second voltage;
the first control circuit is further configured to receive the fifth control signal and communicate a loop between the second voltage input end and the system to be powered according to the fifth control signal when the first voltage is equal to the second voltage, and the second control circuit is further configured to receive the sixth control signal and communicate a loop between the first voltage input end and the system to be powered according to the sixth control signal when the first voltage is equal to the second voltage.
Optionally, the first control circuit comprises: the transistor comprises a seventh resistor, an eighth resistor, a fifth triode, a first MOS (metal oxide semiconductor) tube and a first diode;
a first end of the seventh resistor is connected to the second voltage input end, the first switch circuit, the second switch circuit, and the source of the first MOS transistor, and a second end of the seventh resistor is connected to the first end of the eighth resistor and the gate of the first MOS transistor, respectively;
a second end of the eighth resistor is connected with the first switch circuit and the base of the fifth triode respectively;
a collector electrode of the fifth triode is connected with a grid electrode of the first MOS tube, and an emitter electrode of the fifth triode is grounded;
the drain electrode of the first MOS tube is connected with the anode of the first diode, and the cathode of the first diode is connected with the system to be powered.
Optionally, the second control circuit comprises: the first triode is connected with the first diode;
a first end of the ninth resistor is connected to the first voltage input end, the first switch circuit, and the source of the second MOS transistor, respectively, and a second end of the ninth resistor is connected to a first end of the tenth resistor and the gate of the second MOS transistor, respectively;
a second end of the tenth resistor is connected with the second switch circuit and the base of the sixth triode respectively;
a collector electrode of the sixth triode is connected with a grid electrode of the second MOS tube, and an emitting electrode of the sixth triode is grounded;
the drain electrode of the second MOS tube is connected with the anode of the second diode, and the cathode of the second diode is connected with the system to be powered.
Furthermore, in order to achieve the above object, the present invention further provides a power supply device, which includes the above power supply circuit.
In the utility model, the power supply circuit comprises a voltage comparison module and a control module; the input end of the voltage comparison module is connected with a power supply, the output end of the voltage comparison module is connected with the input end of the control module, and the output end of the control module is connected with a system to be powered; the voltage comparison module is used for accessing multiple voltages input by the power supply, comparing the multiple voltages and generating a control signal to the control module according to a comparison result; the control module is used for controlling multiple voltages input by the power supply to supply power to the system to be powered according to the control signal, supplying power to the system to be powered through the multiple voltages, improving the reliability of the system, comparing the multiple voltages, and selecting corresponding voltages according to the comparison result to supply power, so that the performance of the system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first embodiment of the power supply circuit of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the power supply circuit of the present invention;
fig. 3 is a schematic structural diagram of a third embodiment of the power supply circuit of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | Power supply circuit | R1～R10 | First to |
| 10 | Voltage comparison module | M2～M2 | First to second MOS transistors |
| DC1 | A first voltage input terminal | D1～D2 | First to second diodes |
| DC2 | Second |
20 | |
| 101 | |
201 | |
| 102 | |
202 | Second control circuit |
| A1～A4 | First to fourth switching tubes | 2 | Power supply |
| Q1～Q6 | First to |
3 | To-be-powered system |
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of the power supply circuit of the present invention. The utility model provides a first embodiment of supply circuit.
In the present invention, the power supply circuit 1 includes: a voltage comparison module 10 and a control module 20; the input end of the voltage comparison module 10 is connected with the power supply 2, the output end of the voltage comparison module 10 is connected with the input end of the control module 20, and the output end of the control module 20 is connected with the system 3 to be powered. The power supply 2 outputs voltage to the power supply circuit 1, and the voltage is transmitted to the system to be powered 3 through the power supply circuit 1, so that power supply of the system to be powered 3 is realized.
It should be understood that the voltage comparison module 10 may be configured to compare the magnitude of the input voltage and output a corresponding control signal to the control module 20 according to the magnitude of the voltage, and the control module 20 is configured to control the corresponding voltage to output according to the control signal.
In a specific implementation, the voltage comparing module 10 is configured to access multiple voltages input by the power supply 2, compare the multiple voltages, and generate a control signal to the control module 20 according to a comparison result.
It should be noted that the power supply 2 may provide multiple power supplies, the multiple voltages refer to different power supply voltages provided by the multiple power supplies, the multiple voltages may include a first voltage and a second voltage, the first voltage and the second voltage may be set by themselves, the first voltage may be greater than the second voltage, the first voltage may also be smaller than the second voltage, and the first voltage may also be equal to the second voltage, which is not limited in this embodiment. The control signals may include a first control signal, a second control signal, a third control signal, a fourth control signal, a fifth control signal, and a sixth control signal, where the control signals include at least two of a low level control signal, a high level control signal, and a floating signal, which is not limited in this embodiment.
Based on this, the voltage comparing module 10 is configured to access the first voltage and the second voltage input by the power supply 2, compare the first voltage with the second voltage, and generate a control signal to the control module 20 according to the comparison result. For example, when the first voltage is greater than the second voltage, the voltage comparison module 10 generates a first control signal and a second control signal, and transmits the first control signal and the second control signal to the control module 20. Or when the first voltage is less than the second voltage, the voltage comparison module 10 generates a third control signal and a fourth control signal, and transmits the third control signal and the fourth control signal to the control module 20. Or when the first voltage is equal to the second voltage, the voltage comparison module 10 generates a fifth control signal and a sixth control signal, and transmits the fifth control signal and the sixth control signal to the control module 20.
In this embodiment, the control module 20 is configured to control multiple voltages input by the power supply 2 according to the control signal to supply power to the system to be powered 3.
It should be understood that, when the first voltage is greater than the second voltage, the control module 20 selects a voltage according to the first control signal and the second control signal, for example, selects the first voltage to supply the power to be supplied to the system 3. Or when the first voltage is less than the second voltage, the control module 20 selects a voltage according to the third control signal and the fourth control signal, for example, selects the second voltage to supply power to the system to be powered 3. So set up, this supply circuit 1 can use the power supply of higher mains voltage, guarantees the performance of waiting power supply system 3. Or when the first voltage is equal to the second voltage, the control module 20 selects the voltage according to the fifth control signal and the sixth control signal, for example, selects the first voltage and the second voltage to supply power to the system to be powered 3 at the same time. According to the arrangement, multiple power supply voltages can be used for supplying power, and under the condition that one power supply voltage is unreliable, the other power supply voltage can be replaced in real time, so that uninterrupted power supply of the system to be powered 3 is ensured, and the reliability of the system to be powered is improved.
In the embodiment, a voltage comparison module and a control module are arranged in a power supply circuit, the input end of the voltage comparison module is connected with a power supply, the output end of the voltage comparison module is connected with the input end of the control module, and the output end of the control module is connected with a system to be powered; the voltage comparison module is used for accessing multiple voltages input by the power supply, comparing the multiple voltages and generating a control signal to the control module according to a comparison result; the control module is used for controlling multiple voltages input by the power supply to supply power to the system to be powered according to the control signal, supplying power to the system to be powered through the multiple voltages, improving the reliability of the system, comparing the multiple voltages, and selecting corresponding voltages according to the comparison result to supply power, so that the performance of the system is improved.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a second embodiment of the power supply circuit of the present invention. Based on the above first embodiment, the utility model provides a supply circuit's second embodiment.
In this embodiment, the voltage comparison module 10 includes: a first voltage input terminal DC1, a second voltage input terminal DC2, a first switch circuit 101 and a second switch circuit 102, wherein the first voltage input terminal DC1 is connected to an input terminal of the first switch circuit 101 and an input terminal of the second switch circuit 102, respectively, and the second voltage input terminal DC2 is connected to an input terminal of the first switch circuit 101 and an input terminal of the second switch circuit 102, respectively; the output terminal of the first switch circuit 101 and the output terminal of the second switch circuit 102 are respectively connected to the control module 20. The first voltage input end DC1 is used for accessing a first voltage input by the power supply 2; the second voltage input end DC2 is used for accessing a second voltage input by the power supply 2; the first switch circuit 101 is configured to output a first control signal to the control module 20 when the first voltage is greater than the second voltage, output a third control signal to the control module 20 when the first voltage is less than the second voltage, and output a fifth control signal to the control module 20 when the first voltage is equal to the second voltage; the second switch circuit 102 is configured to output a second control signal to the control module 20 when the first voltage is greater than the second voltage, output a fourth control signal to the control module 20 when the first voltage is less than the second voltage, and output a sixth control signal to the control module 20 when the first voltage is equal to the second voltage.
It should be understood that, in order to ensure the performance of the system to be powered 3, the embodiment chooses to use a larger voltage to power the system to be powered 3, that is, when the first voltage is greater than the second voltage, the system to be powered 3 is powered using the first voltage, when the first voltage is less than the second voltage, the system to be powered 3 is powered using the second voltage, and when the first voltage is equal to the second voltage, the system to be powered 3 is powered using both the first voltage and the second voltage. Based on this, the control module 20 may control to output the first voltage according to the first control signal and the second control signal to supply power to the system to be powered 3 when the first voltage is greater than the second voltage; when the first voltage is lower than the second voltage, the second voltage is controlled to be output according to the third control signal and the fourth control signal to supply power to the system 3 to be powered; and when the first voltage is equal to the second voltage, controlling to output the first voltage and the second voltage according to the fifth control signal and the sixth control signal and simultaneously supplying power to the system to be powered 3.
As a specific implementation manner, the control signals include a low-level control signal and a floating signal, wherein the first control signal and the fourth control signal are low-level control signals, and the second control signal, the third control signal, the fifth control signal and the sixth control signal are floating signals.
That is, when the first voltage is greater than the second voltage, the voltage comparison module 10 generates a first control signal and a second control signal, where the first control signal is a low-level control signal, and the second control signal is a floating signal, and transmits the low-level first control signal and the floating second control signal to the control module 20, so that the control module 20 selects a voltage according to the low-level first control signal and the floating second control signal, selects the first voltage to supply power to the system to be powered 3, and supplies power using a relatively high power supply voltage, thereby ensuring the performance of the system to be powered 3.
When the first voltage is smaller than the second voltage, the voltage comparison module 10 generates a third control signal and a fourth control signal, the third control signal is a suspended signal, the fourth control signal is a low-level control signal, and the suspended third control signal and the low-level fourth control signal are transmitted to the control module 20, so that the control module 20 selects a voltage according to the suspended third control signal and the low-level fourth control signal, selects the second voltage to supply power to the system to be powered 3, supplies power by using a relatively high power supply voltage, and ensures the performance of the system to be powered 3.
When the first voltage is equal to the second voltage, the voltage comparison module 10 generates a fifth control signal and a sixth control signal, both the fifth control signal and the sixth control signal are suspension signals, and the suspension fifth control signal and the suspension sixth control signal are transmitted to the control module 20, so that the control module 20 selects the voltage according to the suspension fifth control signal and the suspension sixth control signal, selects the first voltage and the second voltage to simultaneously supply power to the system to be powered 3, and supplies power by using multiple power supply voltages, and when one of the power supply voltages is unreliable, the other power supply voltage can be replaced in real time, thereby ensuring uninterrupted power supply of the system to be powered 3 and improving the reliability of the system to be powered.
Further, in the present embodiment, the first switch circuit 101 includes: the circuit comprises a first switch tube A1, a second switch tube A2, a first resistor R1, a second resistor R2 and a third resistor R3; a first end of the first resistor R1 is connected to the first voltage input terminal DC1 and the control module 20, respectively, and a second end of the first resistor R1 is connected to an input terminal of the first switching tube A1; a control end of the first switch tube A1 is connected to the second voltage input end DC2 and the control module 20, respectively, and an output end of the first switch tube A1 is connected to a first end of the second resistor R2 and a first end of the third resistor R3, respectively; a second end of the second resistor R2 is connected to a control end of the second switch tube A2, and a second end of the third resistor R3 is connected to an output end of the second switch tube A2 and the control module 20, respectively; the input end of the second switch tube A2 is grounded.
It should be noted that the first switch tube A1 may be a transistor, an MOS transistor, etc., and the second switch tube A2 may be a transistor, an MOS transistor, etc., which is not limited in this embodiment.
In this embodiment, the first switch tube A1 includes: first triode Q1, first triode Q1 are PNP type triode, first triode Q1's base respectively with second voltage input DC2 and control module 20 connects, first triode Q1's projecting pole with first resistance R1's second end is connected, first triode Q1's collecting electrode respectively with second resistance R2's first end and third resistance R3's first end is connected.
In this embodiment, the second switch tube A2 includes: the second triode Q2 is an NPN-type triode, a base of the second triode Q2 is connected to the second end of the second resistor R2, an emitter of the second triode Q2 is grounded, and a collector of the second triode Q2 is connected to the second end of the third resistor R3 and the control module 20 respectively.
In this embodiment, the second switch circuit 102 includes: a third switching tube A3, a fourth switching tube A4, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6; a first end of the fourth resistor R4 is connected to the second voltage input terminal DC2 and the first switch circuit 101, respectively, and a second end of the fourth resistor R4 is connected to an input terminal of the third switch tube A3; a control end of the third switching tube A3 is connected to the first voltage input end DC1, and output ends of the third switching tube A3 are respectively connected to a first end of the fifth resistor R5 and a first end of the sixth resistor R6; a second end of the fifth resistor R5 is connected to a control end of the fourth switching tube A4, and a second end of the sixth resistor R6 is connected to an output end of the fourth switching tube A4 and the control module 20, respectively; the input end of the fourth switching tube A4 is grounded. The first end of the fourth resistor R4 is specifically connected to the second voltage input terminal DC2 and the base of the first triode Q1.
It should be noted that the third switching tube A3 may be a triode, an MOS transistor, etc., and the fourth switching tube A4 may be a triode, an MOS transistor, etc., which is not limited in this embodiment.
In this embodiment, the third switching tube A3 includes: a third triode Q3, the third triode Q3 being a PNP-type triode, the base of the third triode Q3 being connected to the first voltage input terminal DC1, the emitter of the third triode Q3 being connected to the second end of the fourth resistor R4, the collector of the third triode Q3 being connected to the first end of the fifth resistor R5 and the first end of the sixth resistor R6, respectively.
In this embodiment, the fourth switching tube A4 includes: a fourth triode Q4, the fourth triode Q4 being an NPN-type triode, a base of the fourth triode Q4 being connected to the second end of the fifth resistor R5, a collector of the fourth triode Q4 being connected to the second end of the sixth resistor R6 and the control module 20, respectively, and an emitter of the fourth triode Q4 being grounded.
According to the embodiment, the first control signal to the sixth control signal are output through comparison of the first voltage and the second voltage, the first voltage and/or the second voltage are/is transmitted to the system to be powered through the first control signal to the sixth control signal to supply power, the system to be powered can be intelligently switched to the high voltage to supply power to the system to be powered, the maximum performance of the system performance is realized, power can be supplied through multiple power supplies simultaneously, under the condition that one power supply fails, the power supply is switched to the power supply for normal power supply in real time, and the reliability of the system is improved.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a third embodiment of the power supply circuit of the present invention. Based on the first and second embodiments, the present invention provides a third embodiment of the power supply circuit.
In this embodiment, the control module 20 includes: a first control circuit 201 and a second control circuit 202; an input end of the first control circuit 201 is connected to an output end of the first switch circuit 101 and the second voltage input end DC2, an input end of the second control circuit 202 is connected to an output end of the second switch circuit 102 and the first voltage input end DC1, and an output end of the first control circuit 201 and an output end of the second control circuit 202 are connected to the system to be powered 3; the first control circuit 201 is configured to receive the first control signal when the first voltage is greater than the second voltage, and disconnect the loop between the second voltage input terminal DC2 and the system to be powered 3 according to the first control signal, and the second control circuit 202 is configured to receive the second control signal when the first voltage is greater than the second voltage, and connect the loop between the first voltage input terminal DC1 and the system to be powered 3 according to the second control signal; the first control circuit 201 is further configured to receive the third control signal when the first voltage is less than the second voltage, and connect the loop between the second voltage input terminal DC2 and the system to be powered 3 according to the third control signal, and the second control circuit 202 is further configured to receive the fourth control signal when the first voltage is less than the second voltage, and disconnect the loop between the first voltage input terminal DC1 and the system to be powered 3 according to the fourth control signal; the first control circuit 201 is further configured to receive the fifth control signal when the first voltage is equal to the second voltage, and communicate a loop between the second voltage input terminal DC2 and the system to be powered 3 according to the fifth control signal, and the second control circuit 202 is further configured to receive the sixth control signal when the first voltage is equal to the second voltage, and communicate a loop between the first voltage input terminal DC1 and the system to be powered 3 according to the sixth control signal.
It should be noted that an input end of the first control circuit 201 is connected to the second power input end DC2 and an output end of the first switch circuit 101, respectively, and the first control circuit 201 is configured to receive a first control signal, a third control signal, or a fifth control signal output by the output end of the first switch circuit 101, and connect or disconnect a circuit loop between the second power input end DC2 and the system to be powered 3 according to the first control signal, the third control signal, or the fifth control signal; the input end of the second control circuit 202 is connected to the first power input end DC1 and the output end of the second switch circuit 102, respectively, and the second control circuit 202 is configured to receive a second control signal, a fourth control signal, or a sixth control signal output by the output end of the second switch circuit 102, and connect or disconnect a circuit loop between the first power input end DC1 and the system to be powered 3 according to the second control signal, the fourth control signal, or the sixth control signal.
In a specific implementation, when the first voltage is greater than the second voltage, the first control circuit 201 receives a first control signal, the first control signal is a low-level control signal, the second control circuit 202 receives a second control signal, the second control signal is a floating signal, the first control circuit 201 disconnects a circuit loop between the second power input terminal DC2 and the system to be powered 3 according to the first control signal, and the second control circuit 202 connects the circuit loop between the first power input terminal DC1 and the system to be powered 3 according to the second control signal to control the first voltage to power the system to be powered 3. When the first voltage is smaller than the second voltage, the first control circuit 201 receives a third control signal, the third control signal is a floating signal, the second control circuit 202 receives a fourth control signal, the fourth control signal is a low-level control signal, the first control circuit 201 connects a circuit loop between the second power input terminal DC2 and the system to be powered 3 according to the third control signal, and the second control circuit 202 disconnects the circuit loop between the first power input terminal DC1 and the system to be powered 3 according to the fourth control signal. When the first voltage is equal to the second voltage, the first control circuit 201 receives a fifth control signal, the second control circuit 202 receives a sixth control signal, the fifth control signal and the sixth control signal are both floating signals, circuit loops between the first power input terminal DC1 and the second power input terminal DC2 and the system to be powered 3 are both turned on, and the first voltage and the second voltage simultaneously supply power to the system.
In this embodiment, the first control circuit 201 includes: a seventh resistor R7, an eighth resistor R8, a fifth triode Q5, a first MOS tube M1 and a first diode D1; a first end of the seventh resistor R7 is connected to the second voltage input terminal DC2, the first switch circuit 101, the second switch circuit 102, and a source of the first MOS transistor M1, respectively, and a second end of the seventh resistor R7 is connected to a first end of the eighth resistor R8 and a gate of the first MOS transistor M1, respectively; a second end of the eighth resistor R8 is connected to the first switch circuit 101 and a base of the fifth triode Q5, respectively; a collector of the fifth triode Q5 is connected with a gate of the first MOS transistor M1, and an emitter of the fifth triode Q5 is grounded; the drain of the first MOS transistor M1 is connected to the anode of the first diode D1, and the cathode of the first diode D1 is connected to the system to be powered 3.
It should be noted that a first end of the seventh resistor R7 is connected to the second voltage input terminal DC2, the base of the first transistor Q1, a first end of the fourth resistor R4, and the source of the first MOS transistor M1, respectively, and a second end of the seventh resistor R7 is connected to a first end of the eighth resistor R8, the gate of the first MOS transistor M1, and the collector of the fifth transistor Q5, respectively. The second end of the eighth resistor is connected to the second end of the third resistor R3 and the collector of the second transistor Q2, respectively.
In this embodiment, the second control circuit 202 includes: a ninth resistor R9, a tenth resistor R10, a sixth triode Q6, a second MOS transistor M2, and a second diode D2; a first end of the ninth resistor R9 is connected to the first voltage input terminal DC1, the first switch circuit 101, and a source of the second MOS transistor M2, respectively, and a second end of the ninth resistor R9 is connected to a first end of the tenth resistor R10 and a gate of the second MOS transistor M2, respectively; a second end of the tenth resistor R10 is connected to the second switch circuit 102 and a base of the sixth triode Q6, respectively; a collector of the sixth triode Q6 is connected with a gate of the second MOS transistor M2, and an emitter of the sixth triode Q6 is grounded; the drain electrode of the second MOS transistor M2 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the system 3 to be powered.
It should be understood that a first end of the ninth resistor R9 is connected to the first voltage input terminal DC1, a first end of the first resistor R1, and the source of the second MOS transistor M2, respectively, and a second end of the tenth resistor R10 is connected to a second end of the sixth resistor R6, and the collector of the fourth transistor, respectively.
When the first voltage is greater than the second voltage, the first triode Q1 and the second triode Q2 are conducted, the third triode Q3 and the fourth triode Q4 are not conducted, the first control signal output by the first switch circuit 101 is a low-level control signal, and the second control signal output by the second switch circuit 102 is a suspension signal, so that the second MOS transistor M2 is conducted, the first MOS transistor M1 is cut off, the first voltage input by the first voltage input end DC1 is output to the system to be powered 3, and a loop between the second voltage input end DC2 and the system to be powered 3 is not conducted; when the first voltage is smaller than the second voltage, the third triode Q3 and the fourth triode Q4 are conducted, the first triode Q1 and the second triode Q2 are not conducted, the third control signal output by the first switch circuit 101 is a suspension signal, and the fourth control signal output by the second switch circuit 102 is a low-level control signal, so that the first MOS transistor M1 is conducted, the second MOS transistor M2 is cut off, the second voltage input by the second voltage input terminal DC2 is output to the system to be powered 3, and a loop between the first voltage input terminal DC1 and the system to be powered 3 is not conducted; when the first voltage is equal to the second voltage, the first triode Q1, the second triode Q2, the third triode Q3 and the fourth triode Q4 are not conducted, the first switch circuit 101 outputs a fifth control signal, the second switch circuit 102 outputs a sixth control signal, the fifth control signal and the sixth control signal are all suspension signals, so that the first MOS transistor M1 and the second MOS transistor M2 are both conducted, the first voltage input end DC1 and the second voltage input end DC2 are both conducted with a circuit loop between the to-be-powered system 3, and the to-be-powered system 3 is powered through the first voltage and the second voltage.
The power supply system to be supplied with power can be supplied with power by multiple power supplies simultaneously, the power supply system to be supplied with power is supplied with power by the voltage of another power supply under the condition that one power supply is unreliable, the reliability of the power supply system to be supplied with power is improved, and when the power supplies are supplied with power simultaneously, the higher power supply voltage is preferentially selected for supplying power, and the performance of the power supply system to be supplied with power is improved.
In addition, in order to realize the above-mentioned purpose, the utility model discloses still provide a power supply unit. The power supply device comprises a power supply circuit as described above. Since the power supply device can adopt the technical solutions of all the embodiments, the power supply device at least has the beneficial effects brought by the technical solutions of the embodiments, and details are not repeated herein.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A power supply circuit, characterized in that the power supply circuit comprises: the device comprises a voltage comparison module and a control module; the input end of the voltage comparison module is connected with a power supply, the output end of the voltage comparison module is connected with the input end of the control module, and the output end of the control module is connected with a system to be powered;
the voltage comparison module is used for accessing multiple voltages input by the power supply, comparing the multiple voltages and generating a control signal to the control module according to a comparison result;
and the control module is used for controlling the multi-voltage input by the power supply source to supply power to the system to be powered according to the control signal.
2. The power supply circuit of claim 1 wherein said voltage comparison module comprises: the voltage regulator comprises a first voltage input end, a second voltage input end, a first switch circuit and a second switch circuit, wherein the first voltage input end is respectively connected with the input end of the first switch circuit and the input end of the second switch circuit, and the second voltage input end is respectively connected with the input end of the first switch circuit and the input end of the second switch circuit; the output end of the first switch circuit and the output end of the second switch circuit are respectively connected with the control module;
the first voltage input end is used for accessing a first voltage input by the power supply;
the second voltage input end is used for accessing a second voltage input by the power supply;
the first switch circuit is used for outputting a first control signal to the control module when the first voltage is greater than the second voltage;
the second switch circuit is used for outputting a second control signal to the control module when the first voltage is greater than the second voltage;
the control module is used for controlling and outputting the first voltage according to the first control signal and the second control signal to supply power to the system to be supplied with power when the first voltage is greater than the second voltage;
the first switch circuit is further configured to output a third control signal to the control module when the first voltage is less than the second voltage;
the second switch circuit is further configured to output a fourth control signal to the control module when the first voltage is lower than the second voltage;
the control module is further configured to output the second voltage according to the third control signal and the fourth control signal to supply power to the system to be powered when the first voltage is less than the second voltage;
the first switch circuit is further configured to output a fifth control signal to the control module when the first voltage is equal to the second voltage;
the second switch circuit is further configured to output a sixth control signal to the control module when the first voltage is equal to the second voltage;
the control module is further configured to output the first voltage and the second voltage according to the fifth control signal and the sixth control signal to supply power to the system to be powered when the first voltage is equal to the second voltage.
3. The power supply circuit of claim 2, wherein the first switching circuit comprises: the circuit comprises a first switch tube, a second switch tube, a first resistor, a second resistor and a third resistor;
the first end of the first resistor is connected with the first voltage input end and the control module respectively, and the second end of the first resistor is connected with the input end of the first switching tube;
the control end of the first switching tube is respectively connected with the second voltage input end and the control module, and the output end of the first switching tube is respectively connected with the first end of the second resistor and the first end of the third resistor;
the second end of the second resistor is connected with the control end of the second switch tube, and the second end of the third resistor is respectively connected with the output end of the second switch tube and the control module;
the input end of the second switch tube is grounded.
4. The power supply circuit of claim 3 wherein said first switching tube comprises: a first transistor, the second switch tube comprising: a second triode;
a base electrode of the first triode is respectively connected with the second voltage input end and the control module, an emitting electrode of the first triode is connected with a second end of the first resistor, and a collecting electrode of the first triode is respectively connected with a first end of the second resistor and a first end of the third resistor;
the base electrode of the second triode is connected with the second end of the second resistor, the emitting electrode of the second triode is grounded, and the collecting electrode of the second triode is respectively connected with the second end of the third resistor and the control module.
5. The power supply circuit of claim 2, wherein the second switching circuit comprises: the third switching tube, the fourth resistor, the fifth resistor and the sixth resistor;
a first end of the fourth resistor is connected with the second voltage input end and the first switch circuit respectively, and a second end of the fourth resistor is connected with an input end of the third switch tube;
the control end of the third switching tube is connected with the first voltage input end, and the output end of the third switching tube is respectively connected with the first end of the fifth resistor and the first end of the sixth resistor;
a second end of the fifth resistor is connected with a control end of the fourth switching tube, and a second end of the sixth resistor is respectively connected with an output end of the fourth switching tube and the control module;
and the input end of the fourth switching tube is grounded.
6. The power supply circuit of claim 5 wherein said third switching tube comprises: a third triode, the fourth switching tube includes: a fourth triode;
a base electrode of the third triode is connected with the first voltage input end, an emitting electrode of the third triode is connected with a second end of the fourth resistor, and a collector electrode of the third triode is respectively connected with a first end of the fifth resistor and a first end of the sixth resistor;
the base electrode of the fourth triode is connected with the second end of the fifth resistor, the collector electrode of the fourth triode is respectively connected with the second end of the sixth resistor and the control module, and the emitting electrode of the fourth triode is grounded.
7. The power supply circuit of claim 2, wherein the control module comprises: a first control circuit and a second control circuit; the input end of the first control circuit is connected with the output end of the first switch circuit and the second voltage input end respectively, the input end of the second control circuit is connected with the output end of the second switch circuit and the first voltage input end respectively, and the output end of the first control circuit and the output end of the second control circuit are connected with the system to be powered respectively;
the first control circuit is used for receiving the first control signal when the first voltage is greater than the second voltage and disconnecting a loop between the second voltage input end and the system to be powered according to the first control signal, and the second control circuit is used for receiving the second control signal when the first voltage is greater than the second voltage and connecting the loop between the first voltage input end and the system to be powered according to the second control signal;
the first control circuit is further configured to receive the third control signal and connect a loop between the second voltage input end and the system to be powered according to the third control signal when the first voltage is less than the second voltage, and the second control circuit is further configured to receive the fourth control signal and disconnect the loop between the first voltage input end and the system to be powered according to the fourth control signal when the first voltage is less than the second voltage;
the first control circuit is further configured to receive the fifth control signal when the first voltage is equal to the second voltage, and communicate a loop between the second voltage input end and the system to be powered according to the fifth control signal, and the second control circuit is further configured to receive the sixth control signal when the first voltage is equal to the second voltage, and communicate a loop between the first voltage input end and the system to be powered according to the sixth control signal.
8. The power supply circuit of claim 7 wherein said first control circuit comprises: the fourth resistor, the eighth resistor, the fifth triode, the first MOS tube and the first diode are connected in series;
a first end of the seventh resistor is connected to the second voltage input end, the first switch circuit, the second switch circuit, and the source of the first MOS transistor, and a second end of the seventh resistor is connected to the first end of the eighth resistor and the gate of the first MOS transistor, respectively;
a second end of the eighth resistor is connected with the first switch circuit and the base of the fifth triode respectively;
a collector of the fifth triode is connected with a grid electrode of the first MOS tube, and an emitter of the fifth triode is grounded;
the drain electrode of the first MOS tube is connected with the anode of the first diode, and the cathode of the first diode is connected with the system to be powered.
9. The power supply circuit of claim 7 wherein said second control circuit comprises: the ninth resistor, the tenth resistor, the sixth triode, the second MOS tube and the second diode;
a first end of the ninth resistor is connected to the first voltage input end, the first switch circuit and the source of the second MOS transistor, respectively, and a second end of the ninth resistor is connected to the first end of the tenth resistor and the gate of the second MOS transistor, respectively;
a second end of the tenth resistor is connected with the second switch circuit and the base of the sixth triode respectively;
a collector electrode of the sixth triode is connected with a grid electrode of the second MOS tube, and an emitting electrode of the sixth triode is grounded;
the drain electrode of the second MOS tube is connected with the anode of the second diode, and the cathode of the second diode is connected with the system to be powered.
10. A power supply device, characterized in that it comprises a power supply circuit according to any one of the preceding claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222145652.7U CN218183250U (en) | 2022-08-15 | 2022-08-15 | Power supply circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222145652.7U CN218183250U (en) | 2022-08-15 | 2022-08-15 | Power supply circuit and device |
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| Publication Number | Publication Date |
|---|---|
| CN218183250U true CN218183250U (en) | 2022-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222145652.7U Active CN218183250U (en) | 2022-08-15 | 2022-08-15 | Power supply circuit and device |
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| Country | Link |
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| CN (1) | CN218183250U (en) |
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2022
- 2022-08-15 CN CN202222145652.7U patent/CN218183250U/en active Active
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