CN112968518A - Power supply system comprising backup power supply - Google Patents

Power supply system comprising backup power supply Download PDF

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Publication number
CN112968518A
CN112968518A CN202110265075.2A CN202110265075A CN112968518A CN 112968518 A CN112968518 A CN 112968518A CN 202110265075 A CN202110265075 A CN 202110265075A CN 112968518 A CN112968518 A CN 112968518A
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China
Prior art keywords
controllable switch
power supply
module
inverter
main power
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Granted
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CN202110265075.2A
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Chinese (zh)
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CN112968518B (en
Inventor
武世明
刘程斌
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Hunan Goke Microelectronics Co Ltd
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Hunan Goke Microelectronics Co Ltd
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    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

The invention discloses a power supply system comprising a backup power supply, which comprises a main power supply, a backup power supply and a backflow prevention module, wherein the backup power supply can supply power to a power-off module and a power-off module in a chip when the main power supply outputs power, charge the backup power supply, and supply power to the power-off module in the chip by using the backup power supply when the main power supply outputs normal voltage, so that important information in the power-off module is not lost due to power-off of the main power supply. In addition, because the anti-backflow module is arranged in the chip, namely the anti-backflow module is integrated in the chip, when the anti-backflow module is applied to a product, the cost and the volume of the product can be reduced.

Description

Power supply system comprising backup power supply
Technical Field
The present invention relates to the field of integrated circuit applications, and more particularly to a power supply system including a backup power supply.
Background
The technical scheme of the standby power supply is important in the fields of applications (such as storage, power, navigation and the like) related to important information storage, and the standby power supply is used for supplying power to a non-power-off module in a chip system when a main power supply is powered off so as to ensure that important information in the chip system cannot be lost due to power-off of the main power supply. In addition, the primary power source may generally charge the backup power source, and preventing the backup power source from supplying power back (i.e., backward) to the primary power source is a necessary function of the backup power source in relation to the power supply scheme.
Referring to fig. 1, fig. 1 is a schematic diagram of a power supply solution of a standby power supply in the prior art, in order to implement a backflow prevention function, a backflow prevention diode D is generally connected between the standby power supply and a main power supply in the prior art, when the main power supply supplies power, the diode D is turned on, and the whole chip system is powered by the main power supply; when the main power supply is powered off, the part which can not be powered off in the chip system is powered by the backup power supply, and at the moment, the diode D is reversely biased and can not be conducted, so that the function of preventing backflow is realized.
In the implementation mode in the prior art, a backflow-preventing diode D needs to be added on the periphery of a chip, so that two disadvantages exist, namely, the cost is increased, namely, when a PCB is built, the diode needs to be purchased in addition to the chip; secondly, when the PCB is built, the diode D and the chip are mutually separated, namely the chip and the diode D are required to be respectively welded on the PCB, the occupied area of the PCB is large, when the diode D is applied to a product, the volume of the product can be increased, and the method is contrary to the development trend of the product with low cost and small volume.
Disclosure of Invention
The invention aims to provide a power supply system comprising a backup power supply, which ensures that important information in an uninterruptible module is not lost due to the power failure of a main power supply. In addition, because the anti-backflow module is arranged in the chip, namely the anti-backflow module is integrated in the chip, when the anti-backflow module is applied to a product, the cost and the volume of the product can be reduced.
To solve the above technical problem, the present invention provides a power supply system including a backup power supply, including:
the main power supply is used for supplying power to the power-off module in the chip and the power-off-unavailable module in the chip when normal voltage output exists and charging the standby power supply;
the standby power supply is used for supplying power to the uninterruptible module when the main power supply is powered down;
the backflow prevention module is integrated in the chip, a first end of the backflow prevention module is connected with the main power supply, a second end of the backflow prevention module is connected with the standby power supply, and the backflow prevention module is used for enabling a passage between the first end and the second end of the backflow prevention module to be conducted when the main power supply has normal voltage output so as to enable the main power supply to charge the standby power supply; and when the main power supply is powered off, the path between the first end and the second end of the main power supply is cut off.
Preferably, the backflow prevention module comprises a controllable switch module and a reverser module;
the first end of the controllable switch module is respectively connected with the output end of the main power supply, the first end of the power-off module and the input end of the inverter, the control end of the controllable switch is connected with the output end of the inverter, the second end of the controllable switch is connected with the first end of the phase inverter, the first end of the power-off module and the standby power supply, and the second end of the phase inverter, the second end of the power-off module and the second end of the power-off module are all grounded;
the inverter module is used for outputting a low level to enable a passage between a first end and a second end of the controllable switch module to be conducted when the main power supply has normal voltage output, so that the main power supply charges the standby power supply through the controllable switch module, and outputting a high level to enable the passage between the first end and the second end of the controllable switch to be cut off when the main power supply is powered off.
Preferably, the controllable switch module comprises a first controllable switch and the inverter module comprises a first inverter;
the first end of the first controllable switch is the first end of the controllable switch module, the second end of the first controllable switch is the second end of the controllable switch module, the control end of the first controllable switch is the control end of the controllable switch module, the first end of the first phase inverter is the first end of the phase inverter module, and the second end of the first phase inverter is the second end of the phase inverter module.
Preferably, the first inverter comprises a third controllable switch and a fourth controllable switch;
a first end of the third controllable switch is used as a first end of the first inverter, a second end of the third controllable switch is connected with a first end of the fourth controllable switch and is used as an output end of the first inverter, a control end of the third controllable switch is connected with a control end of the fourth controllable switch and is used as an input end of the first inverter, and a second end of the fourth controllable switch is used as a second end of the first inverter.
Preferably, the controllable switch module further comprises a second controllable switch;
the inverter module further comprises a second inverter;
a first end of the first controllable switch is connected with a first end of the second controllable switch and serves as a first end of the controllable switch module, a second end of the first controllable switch is connected with a second end of the second controllable switch and serves as a second end of the controllable switch, a control unit of the first controllable switch is respectively connected with an output end of the first phase inverter and an input end of the second phase inverter, a control end of the second controllable switch is connected with an output end of the second phase inverter, a first end of the second phase inverter is connected with the standby power supply, and a second end of the second phase inverter is grounded;
the second inverter is used for outputting a high level to enable the first end and the second end of the second controllable switch to be connected when the main power supply has normal voltage output, and outputting a low level to enable the first end and the second end of the second controllable switch to be disconnected when the main power supply is powered off.
Preferably, the second inverter comprises a fifth controllable switch and a sixth controllable switch;
a first end of the fifth controllable switch is used as a first end of the second inverter, a second end of the fifth controllable switch is connected with a first end of the sixth controllable switch and is used as an output end of the second inverter, a control end of the fifth controllable switch is connected with a control end of the sixth controllable switch and is used as an input end of the second inverter, and a second end of the sixth controllable switch is used as a second end of the second inverter.
Preferably, the first controllable switch, the third controllable switch and the fifth controllable switch are P-channel metal-oxide semiconductor field effect transistors PMOS transistors; the second controllable switch, the fourth controllable switch and the sixth controllable switch are all N-channel metal-oxide semiconductor field effect transistor NMOS tubes.
Preferably, the backup power source is an energy storage capacitor or a rechargeable battery.
The application provides a power supply system including back-up source, including main power supply, stand-by power supply and prevent flowing backward the module, can be when the main power supply has power output for the module can cut off the power supply of power module and the module can not cut off the power supply in the chip, and charge for stand-by power supply, and when the main power supply falls the power, use stand-by power supply to the module power supply that can not cut off the power supply in the chip to guarantee that important information in the module can not lose because of the main power supply outage. In addition, because the anti-backflow module is arranged in the chip, namely the anti-backflow module is integrated in the chip, when the anti-backflow module is applied to a product, the cost and the volume of the product can be reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art power supply solution for a backup power supply;
FIG. 2 is a block diagram of a power supply system including a backup power supply according to the present invention;
FIG. 3 is a block diagram of another power system including a backup power supply according to the present invention;
FIG. 4 is a schematic diagram of an embodiment of a power supply system including a backup power source according to the present invention;
fig. 5 is a schematic diagram of another embodiment of a power supply system including a backup power source according to the present invention.
Detailed Description
The core of the invention is to provide a power supply system comprising a backup power supply, which ensures that important information in the uninterruptible module is not lost due to the power failure of the main power supply. In addition, because the anti-backflow module is arranged in the chip, namely the anti-backflow module is integrated in the chip, when the anti-backflow module is applied to a product, the cost and the volume of the product can be reduced.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a block diagram of a power supply system including a backup power source according to the present invention, the system includes:
the main power supply 1 is used for supplying power to a power-off module in the chip and a power-off unavailable module in the chip when normal voltage is output, and charging the standby power supply 2;
the standby power supply 2 is used for supplying power to the uninterruptible module when the main power supply 1 is powered down;
the backflow prevention module 3 is integrated in the chip, the first end of the backflow prevention module is connected with the main power supply 1, the second end of the backflow prevention module is connected with the standby power supply 2, and the backflow prevention module is used for conducting a channel between the first end and the second end of the backflow prevention module when the main power supply 1 has normal voltage output so that the main power supply 1 can charge the standby power supply 2; and when the main power supply 1 is powered off, the path between the first end and the second end of the main power supply is cut off.
Considering that when the anti-backflow module 3 is disposed outside the chip, the volume and cost of the product may be increased when the anti-backflow module is applied to the product, which is contrary to the development trend of low-cost and small-volume products.
For solving above-mentioned technical problem, the design of this application for prevent flowing backward module 3 integrate inside the chip, when being applied to the product with the chip, reduce the volume and the cost of product.
Based on this, the application provides a power supply system including back-up source, including main power supply 1, stand-by power supply 2 and prevent flowing backward module 3, can be when main power supply 1 has power output for the module that can cut off the power supply and the module that can not cut off the power supply in the chip to charge for stand-by power supply 2, and when main power supply 1 falls the power, use stand-by power supply 2 to the module power supply that can not cut off the power supply in the chip, thereby guarantee that important information in the module that can not cut off the power supply can not lose because of main power supply 1 outage. In addition, because the backflow prevention module 3 is arranged in the chip, namely the backflow prevention module 3 is integrated in the chip, when the backflow prevention module is applied to a product, the cost and the volume of the product can be reduced.
In addition, it should be noted that the backflow prevention module 3 in this application may be, but is not limited to, a diode, at this time, an anode of the diode is connected to the main power supply 1, a cathode of the diode is connected to the standby power supply 2, when the main power supply 1 has a power output, the diode is turned on, the main power supply 1 charges the standby power supply 2, when the main power supply 1 does not have the power output, the diode is turned off in a reverse direction, the standby power supply 2 supplies power to the uninterruptible module in the chip, and the diode prevents a current output by the standby power supply 2 from flowing backward to the main power supply 1, so that the main power.
Of course, the specific implementation manner of the backflow prevention module 3 is not limited to a diode, and may be other modules having a backflow prevention function, and the present application is not limited thereto.
In summary, the power supply system including the backup power supply in the present application ensures that important information in the uninterruptible module is not lost due to the power failure of the main power supply 1. In addition, the backflow prevention module 3 integrated in the chip can realize the backflow prevention function, so that an external backflow prevention diode does not need to be added when the backflow prevention module is applied to a product, and the cost and the volume of the applied product can be reduced.
On the basis of the above-described embodiment:
referring to fig. 3, fig. 3 is a block diagram of another power supply system including a backup power source according to the present invention.
As a preferred embodiment, the backflow prevention module 3 comprises a controllable switch module and an inverter module;
the first end of the controllable switch module is respectively connected with the output end of the main power supply 1, the first end of the power-off module and the input end of the reverser, the control end of the controllable switch is connected with the output end of the reverser, the second end of the controllable switch is connected with the first end of the phase inverter, the first end of the power-off module and the standby power supply 2, and the second end of the phase inverter, the second end of the power-off module and the second end of the power-off module are all grounded;
the inverter module is used for outputting a low level to enable a passage between a first end and a second end of the controllable switch module to be conducted when the main power supply 1 has normal voltage output, so that the main power supply 1 charges the standby power supply 2 through the controllable switch module, and outputting a high level to enable the passage between the first end and the second end of the controllable switch to be cut off when the main power supply 1 is powered off.
Considering that when a diode is used as a specific implementation manner of the backflow prevention module 3, since the diode has a certain voltage drop when conducting, when the main power supply 1 charges the standby power supply 2 and supplies power to the power-off module and the power-off-impossible module in the chip, the power supply voltage may be lower than the output voltage of the main power supply 1, and there may be a case where the power supply is unstable.
For solving above-mentioned technical problem, prevent flowing backward module 3 in this application includes controllable switch module and reverser module, when main power 1 has normal voltage output, the input of phase inverter is the high level, the output is the low level, the route between the first end of this moment control controllable switch module and the second end switches on, thereby realize that main power 1 charges for stand-by power 2, and for the outage module in the chip and the module power supply that can not cut off, when main power 1 loses the power, the input of phase inverter is the low level, the output is the high level, the route between the first end of this moment control controllable switch module and the second end is cut off, thereby stand-by power 2's electric current can not flow backward to main power 1, and stand-by power 2 still can be for the module power supply that can cut off.
In summary, the backflow prevention module 3 in this embodiment can realize the function that the current of the standby power supply 2 does not flow back to the main power supply 1, and in addition, the voltage drop of the controllable switch module is extremely small and can be ignored, thereby ensuring the stability of power supply.
As a preferred embodiment, the controllable switch module comprises a first controllable switch, and the inverter module comprises a first inverter;
the first end of the first controllable switch is the first end of the controllable switch module, the second end of the first controllable switch is the second end of the controllable switch module, the control end of the first controllable switch is the control end of the controllable switch module, the first end of the first phase inverter is the first end of the phase inverter module, and the second end of the first phase inverter is the second end of the phase inverter module.
In this embodiment, the first controllable switch is a controllable switch that is turned on between the first end and the second end of the first controllable switch when the control end is at a low level, at this time, when the main power source 1 has a normal voltage output, the input end of the first inverter is at a high level, the output end is at a low level, and at this time, the path between the first end and the second end of the first controllable switch is controlled to be turned on, so that the main power source 1 is charging the standby power source 2 and supplying power to the power-off module and the power-uninterruptible module in the chip, when the main power source 1 is powered off, the input end of the first inverter is at a low level, the output end is at a high level, and at this time, the path between the first end and the second end of the first controllable switch is controlled to be turned off, so that the current of the standby power source 2 cannot flow back to the main power.
Referring to fig. 4, fig. 4 is a specific implementation schematic diagram of a power supply system including a backup power supply according to the present invention, where the first controllable switch may be a PMOS (positive channel Metal Oxide Semiconductor) transistor MPSW, or certainly may be a BJT transistor, and the present application is not limited thereto.
In summary, in the embodiment, the first controllable switch and the first inverter can achieve the function of the backflow prevention module 3, that is, after the main power supply 1 is powered down, the current of the standby power supply 2 can be prevented from flowing backward into the main power supply 1 through the first controllable switch and the first inverter, and the voltage drop when the first controllable switch is turned on is small, so that the reliability of power supply is ensured.
As a preferred embodiment, the first inverter comprises a third controllable switch and a fourth controllable switch;
the first end of the third controllable switch is used as the first end of the first phase inverter, the second end of the third controllable switch is connected with the first end of the fourth controllable switch and is used as the output end of the first phase inverter, the control end of the third controllable switch is connected with the control end of the fourth controllable switch and is used as the input end of the first phase inverter, and the second end of the fourth controllable switch is used as the second end of the first phase inverter.
The present application aims to provide a specific implementation manner of a first inverter, specifically, the first inverter includes a third controllable switch and a fourth controllable switch, and implements a function of inverting and outputting a level signal at an input end of the inverter, please refer to fig. 4, the first inverter may include, but is not limited to, MP0 and MN0, an output end of the first inverter is SWB, wherein, when a main power supply 1 has a normal voltage output, control ends of MP0 and MN0 are at a high level, MN0 is turned on, MP0 is turned off, SWB is at a low level, MPSW is turned on, the main power supply 1 supplies power to a power-off module in a chip, and supplies power to a power-off module through MPSW, and simultaneously charges a standby power supply 2; when the main power supply 1 is powered off, the control ends of the MP0 and the MN0 are at low level, the MN0 is cut off, the MP0 is switched on, the SWB is at high level, the MPSW is cut off, the standby power supply 2 supplies power to the uninterruptible module in the chip, and the current of the standby power supply 2 cannot flow back to the main power supply 1 because the MPSW is cut off. In summary, the first inverter in the present application can implement a function of inverting and outputting a level signal at an input end of the inverter, and the implementation manner is simple, and when the first inverter is a MOS transistor, the size is small and the control manner is simple.
Of course, the specific implementation of the first inverter in the present application is not limited to the above example, and other implementations are possible, and the present application is not limited thereto.
As a preferred embodiment, the controllable switch module further comprises a second controllable switch;
the inverter module further comprises a second inverter;
the first end of the first controllable switch is connected with the first end of the second controllable switch and serves as the first end of the controllable switch module, the second end of the first controllable switch is connected with the second end of the second controllable switch and serves as the second end of the controllable switch, the control unit of the first controllable switch is respectively connected with the output end of the first phase inverter and the input end of the second phase inverter, the control end of the second controllable switch is connected with the output end of the second phase inverter, the first end of the second phase inverter is connected with the standby power supply 2, and the second end of the second phase inverter is grounded;
the second inverter is used for outputting a high level to enable the first end and the second end of the second controllable switch to be connected when the main power supply 1 has normal voltage output, and outputting a low level to enable the first end and the second end of the second controllable switch to be disconnected when the main power supply 1 is powered down.
Considering that when the main power supply 1 is powered down, the power may not be completely powered down, but the first controllable switch cannot be turned on, at this time, the main power supply 1 still has a power output, but cannot supply power to the power-off module and the power-off unavailable module in the chip and the standby power supply 2.
In order to solve the technical problem, the controllable switch module in the present application further includes a second controllable switch, wherein the second controllable switch controls the conduction between the first end and the second end of the second controllable switch when the control end is at a high level, which is opposite to the mode of the first controllable switch, at this time, when the level of the main power source 1 is not enough to make the first controllable switch conduct, the second controllable switch can conduct, and then the main power source 1 can continue to provide power for the power-off module and the power-off-disabled module in the chip and the standby power source 2, thereby improving the reliability of power supply of the main power source 1.
Specifically, when the controllable switch module of the present application further includes a second controllable switch, the level state of the control terminal of the second controllable terminal is controlled by the voltage state of the output terminal of the second inverter, which is the same as the voltage state of the output terminal of the first inverter, and is opposite to the voltage state of the output terminal of the first inverter.
As a preferred embodiment, the second inverter comprises a fifth controllable switch and a sixth controllable switch;
the first end of the fifth controllable switch is used as the first end of the second inverter, the second end of the fifth controllable switch is connected with the first end of the sixth controllable switch and is used as the output end of the second inverter, the control end of the fifth controllable switch is connected with the control end of the sixth controllable switch and is used as the input end of the second inverter, and the second end of the sixth controllable switch is used as the second end of the second inverter.
As a preferred embodiment, the first controllable switch, the third controllable switch and the fifth controllable switch are all P-channel metal-oxide semiconductor field effect transistors PMOS transistors; the second controllable switch, the fourth controllable switch and the sixth controllable switch are all N-channel metal-oxide semiconductor field effect transistor NMOS tubes.
The present embodiment is directed to provide a specific implementation manner of the second inverter, and specifically, the second inverter includes a fifth controllable switch and a sixth controllable switch, and implements a function of inverting and outputting a level signal at an input end of the second inverter, so as to control the second controllable switch. Specifically, referring to fig. 5, fig. 5 is a schematic diagram illustrating another embodiment of a power supply system including a backup power supply according to the present invention, wherein the second controllable switch is an NMOS transistor MNSW, the second inverter includes, but is not limited to, MP1 and MN1, an input end of the second inverter is SWB, and an output end thereof is SW, wherein when the main power supply 1 has a normal voltage output, control ends of MP0 and MN0 are at a high level, MN0 is turned on, MP0 is turned off, SWB is at a low level, MPSW is turned on, MP1 is turned on, MN1 is turned off, SW is at a high level, and MNSW is turned on, the main power supply 1 supplies power to a power-off module in the chip, and supplies power to a power-off module in the chip through MPSW and MNSW, and charges the backup power supply 2 at the same time; when the main power supply 1 is powered off, the control ends of the MP0 and the MN0 are at a low level, the MN0 is turned off, the MP0 is turned on, the SWB is at a high level, the MPSW is turned off, the MP1 is turned off, the MN1 is turned on, the SW is at a low level, the MNSW is turned off, at this time, the standby power supply 2 supplies power to the uninterruptible module in the chip, and the current of the standby power supply 2 cannot flow back to the main power supply 1 because the MPSW and the MNSW are turned off.
In summary, the specific implementation manner of the second inverter in the present application can implement the function of controlling the second controllable switch, and the implementation manner is simple and easy to control.
Of course, the second inverter implementation in the present application is not limited to the above example, and the present application is not limited thereto.
As a preferred embodiment, the backup power source 2 is an energy storage capacitor or a rechargeable battery.
The backup power source 2 in the present application may be, but is not limited to, an energy storage capacitor or a rechargeable battery, and may also be other energy storage power source types, and the present application is not limited thereto.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A power supply system including a backup power source, comprising:
the main power supply is used for supplying power to the power-off module in the chip and the power-off-unavailable module in the chip when normal voltage output exists and charging the standby power supply;
the standby power supply is used for supplying power to the uninterruptible module when the main power supply is powered down;
the backflow prevention module is integrated in the chip, a first end of the backflow prevention module is connected with the main power supply, a second end of the backflow prevention module is connected with the standby power supply, and the backflow prevention module is used for enabling a passage between the first end and the second end of the backflow prevention module to be conducted when the main power supply has normal voltage output so as to enable the main power supply to charge the standby power supply; and when the main power supply is powered off, the path between the first end and the second end of the main power supply is cut off.
2. The power supply system including a backup power supply of claim 1, wherein said back-up prevention module includes a controllable switch module and an inverter module;
the first end of the controllable switch module is respectively connected with the output end of the main power supply, the first end of the power-off module and the input end of the inverter, the control end of the controllable switch is connected with the output end of the inverter, the second end of the controllable switch is connected with the first end of the phase inverter, the first end of the power-off module and the standby power supply, and the second end of the phase inverter, the second end of the power-off module and the second end of the power-off module are all grounded;
the inverter module is used for outputting a low level to enable a passage between a first end and a second end of the controllable switch module to be conducted when the main power supply has normal voltage output, so that the main power supply charges the standby power supply through the controllable switch module, and outputting a high level to enable the passage between the first end and the second end of the controllable switch to be cut off when the main power supply is powered off.
3. The power supply system including a backup power source of claim 2, wherein said controllable switch module includes a first controllable switch, said inverter module includes a first inverter;
the first end of the first controllable switch is the first end of the controllable switch module, the second end of the first controllable switch is the second end of the controllable switch module, the control end of the first controllable switch is the control end of the controllable switch module, the first end of the first phase inverter is the first end of the phase inverter module, and the second end of the first phase inverter is the second end of the phase inverter module.
4. The power supply system including a backup power source of claim 3, wherein said first inverter includes a third controllable switch and a fourth controllable switch;
a first end of the third controllable switch is used as a first end of the first inverter, a second end of the third controllable switch is connected with a first end of the fourth controllable switch and is used as an output end of the first inverter, a control end of the third controllable switch is connected with a control end of the fourth controllable switch and is used as an input end of the first inverter, and a second end of the fourth controllable switch is used as a second end of the first inverter.
5. A power supply system including a backup power supply according to any of claims 3-4, characterized in that the controllable switch module further comprises a second controllable switch;
the inverter module further comprises a second inverter;
a first end of the first controllable switch is connected with a first end of the second controllable switch and serves as a first end of the controllable switch module, a second end of the first controllable switch is connected with a second end of the second controllable switch and serves as a second end of the controllable switch, a control unit of the first controllable switch is respectively connected with an output end of the first phase inverter and an input end of the second phase inverter, a control end of the second controllable switch is connected with an output end of the second phase inverter, a first end of the second phase inverter is connected with the standby power supply, and a second end of the second phase inverter is grounded;
the second inverter is used for outputting a high level to enable the first end and the second end of the second controllable switch to be connected when the main power supply has normal voltage output, and outputting a low level to enable the first end and the second end of the second controllable switch to be disconnected when the main power supply is powered off.
6. The power supply system including a backup power source according to claim 4, wherein said second inverter includes a fifth controllable switch and a sixth controllable switch;
a first end of the fifth controllable switch is used as a first end of the second inverter, a second end of the fifth controllable switch is connected with a first end of the sixth controllable switch and is used as an output end of the second inverter, a control end of the fifth controllable switch is connected with a control end of the sixth controllable switch and is used as an input end of the second inverter, and a second end of the sixth controllable switch is used as a second end of the second inverter.
7. The power supply system including a backup power supply of claim 5, wherein said first controllable switch, said third controllable switch, and said fifth controllable switch are all P-channel metal-oxide-semiconductor field effect transistors (PMOS); the second controllable switch, the fourth controllable switch and the sixth controllable switch are all N-channel metal-oxide semiconductor field effect transistor NMOS tubes.
8. The power supply system including a backup power source according to claim 1, wherein said backup power source is an energy storage capacitor or a rechargeable battery.
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