CN113437792A - Power supply control circuit - Google Patents
Power supply control circuit Download PDFInfo
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- CN113437792A CN113437792A CN202110410277.1A CN202110410277A CN113437792A CN 113437792 A CN113437792 A CN 113437792A CN 202110410277 A CN202110410277 A CN 202110410277A CN 113437792 A CN113437792 A CN 113437792A
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- power supply
- voltage
- control circuit
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Abstract
The application discloses power supply control circuit relates to power electronics technical field. The power supply control circuit adopts the mode of additionally arranging the first control circuit and the second control circuit, and correspondingly controls the main power voltage feedback module, the main power supply module, the standby power voltage feedback module and the standby power supply module according to different situations on the premise that the voltage output requirement of the standby power is the same as the voltage output requirement of the main power, so that the competition phenomenon of the main power supply and the standby power supply is avoided, the technical effect of ensuring that the standby power supply is recovered to be the main power supply when the main power is recovered to be normal is achieved, and the reliability of the power supply control circuit is enhanced.
Description
Technical Field
The application relates to the technical field of power electronics, in particular to a power supply control circuit.
Background
With the development of the times, because various devices commonly used in life cannot be powered on, how to ensure the stability of power supply becomes one of the key points of the research focused by the current technological development.
In order to maintain uninterrupted power supply, a double power supply mode of main power supply and standby power supply is mostly adopted in the conventional power supply control circuit, so that the power supply control circuit can be switched to the standby power supply when the main power supply is abnormal, however, when the voltage output requirement of the standby power supply is the same as that of the main power, the main power supply and the standby power supply are easy to generate competition phenomena, and the main power supply and the standby power supply are difficult to be restored to the main power supply from the standby power supply when the main power is restored to be normal.
Disclosure of Invention
The application provides a power supply control circuit which can ensure that a main power supply is recovered from a standby power supply when the main power supply is recovered to be normal.
In order to achieve the above technical effect, a first aspect of the present application provides a power supply control circuit, including: the system comprises a main power supply module, a main power voltage feedback module, a standby power supply module, a standby power voltage feedback module, a first control circuit and a second control circuit;
the main power supply module is used for acquiring the real-time output voltage of the power supply control circuit and sending a main power feedback signal to the main power supply module based on the output voltage;
the standby power supply voltage feedback module is used for acquiring the output voltage and sending a standby power supply feedback signal to the standby power supply module based on the output voltage;
the main power supply module is used for adjusting the power supply voltage of the main power supply module to reach a preset voltage threshold value based on the main power feedback signal so as to enable the output voltage to reach the voltage threshold value;
the standby power supply module is used for adjusting the power supply voltage of the standby power supply module to reach the voltage threshold value based on the standby power feedback signal so as to enable the output voltage to reach the voltage threshold value;
the first control circuit is used for disconnecting the main power supply voltage feedback module from the main power supply module when the power supply state of the main power is converted from a normal state to an abnormal state; when the power supply state is switched from an abnormal state to a normal state, and the second control circuit controls the standby power supply module to reduce the power supply voltage of the standby power, the connection between the main power voltage feedback module and the main power supply module is communicated;
the second control circuit is configured to reduce a power supply voltage of the standby power supply module when the power supply state is changed from an abnormal state to a normal state.
Based on the first aspect of the present application, in a first possible implementation manner, the main power supply module includes a voltage control chip, and a compensation pin is disposed on the voltage control chip;
wherein, the voltage control chip is used for: when the compensation pin is not suspended, adjusting the power supply voltage of the main power supply module to the voltage threshold value based on the main power feedback signal; and when the compensation pin is suspended, the main power supply module is blocked.
Based on the first possible implementation manner of the first aspect of the present application, in a second possible implementation manner, the standby power supply module includes an enable pin;
the standby power supply module takes effect when the input voltage of the enable pin is at a high level, and the standby power supply module fails when the input voltage of the enable pin is at a low level;
the second control circuit is specifically configured to: and when the power supply state is converted from the abnormal state to the normal state, the input voltage of the enable pin is switched from a high level to a low level.
Based on the second possible implementation manner of the first aspect of the present application, in a third possible implementation manner, the power supply control circuit further includes: and a negative voltage generating circuit for connecting with the output end of the main power supply module and outputting a negative voltage when the power supply state is a normal state.
Based on the third possible implementation manner of the first aspect of the present application, in a fourth possible implementation manner, the second control circuit includes: a voltage regulator diode;
the enabling pin of the standby power supply module is respectively connected with the anode of the voltage stabilizing diode and the standby power;
the negative electrode of the voltage stabilizing diode is connected with the output end of the negative voltage generating circuit;
the zener diode is reversely broken down when the negative voltage exists, so as to switch the input voltage of the enable pin from a high level to a low level.
Based on the fourth possible implementation manner of the first aspect of the present application, in a fifth possible implementation manner, the main voltage feedback module further includes: a photoelectric coupler;
the above-mentioned photoelectric coupler includes: a light receiver, a light emitting source;
the first control circuit includes: a second switching transistor;
the compensation pin is connected to an input terminal of the light receiver, an output terminal of the light receiver is grounded, a base of the second switching transistor is connected to an output terminal of the power supply control circuit and an output terminal of the negative voltage generation circuit, respectively, a collector of the second switching transistor is connected to the main voltage feedback module, and an emitter of the second switching transistor is grounded;
the input end and the output end of the light receiver are conducted when a first condition is met, and the photoelectric coupler works in a linear working area or is cut off when the first condition is not met;
the second switching transistor is turned off when the negative voltage exists and is turned on when the negative voltage does not exist;
the first condition is: the second switching triode is cut off, and the output voltage collected by the main electric voltage feedback module reaches the voltage threshold value.
Based on possible implementation manners of the present application, the voltage control chip is specifically a PWM control chip.
Based on the possible implementation manners of the present application, the power supply control circuit is applied to a power supply circuit of a power supply chip.
Therefore, the power supply control circuit provided by the application adopts the mode of additionally arranging the first control circuit and the second control circuit, and correspondingly controls the main power voltage feedback module, the main power supply module, the standby power voltage feedback module and the standby power supply module according to different situations on the premise that the voltage output requirement of standby power is the same as that of the main power, so that the competition phenomenon of the main power supply and the standby power supply is avoided, the technical effect of ensuring that the standby power supply is recovered to the main power supply when the main power is recovered to be normal is achieved, and the reliability of the power supply control circuit is enhanced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of a power supply control circuit provided in the present application;
FIG. 2-a is a block diagram of one embodiment of a first control circuit of the power control circuit and its associated circuit configuration provided herein;
FIG. 2-b is a block diagram of one embodiment of a second control circuit of the power control circuit and its associated circuit configuration provided herein;
fig. 3 is a block diagram of an embodiment of a first control circuit, a second control circuit and their related circuit structures of a power supply control circuit provided in the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.
Example one
The present application provides a power supply control circuit, as shown in fig. 1, including: a main power supply module 101, a standby power supply module 102, a main power voltage feedback module 103, a standby voltage feedback module 104, a first control circuit 105 and a second control circuit 106;
the main electric voltage feedback module 103 is configured to collect a real-time output voltage of the power supply control circuit, and send a main electric feedback signal to the main electric power supply module based on the output voltage;
the standby power supply voltage feedback module 104 is configured to collect the output voltage, and send a standby power supply feedback signal to the standby power supply module based on the output voltage;
the main power supply module 101 is configured to adjust a power supply voltage of the main power supply module 101 to reach a preset voltage threshold based on the main power feedback signal, so that the output voltage reaches the voltage threshold;
the standby power supply module 102 is configured to adjust a power supply voltage of the standby power supply module 102 to reach the voltage threshold based on the standby power feedback signal, so that the output voltage reaches the voltage threshold;
the first control circuit 105 is configured to disconnect the main power supply voltage feedback module 103 from the main power supply module 101 when the power supply state of the main power is changed from the normal state to the abnormal state; and after the power supply state is changed from the abnormal state to the normal state and the second control circuit 106 takes effect, the connection between the main power supply voltage feedback module 103 and the main power supply module 101 is communicated;
the second control circuit 106 is configured to reduce the power supply voltage of the standby power supply module 102 when the power supply state is changed from the abnormal state to the normal state.
In this embodiment, when the master power supply module supplies power, the master power supply module is connected to the master power supply module and cooperates with the master power voltage feedback module to adjust the power supply voltage of the master power supply module until the power supply voltage of the master power supply module reaches a preset voltage threshold; when the standby power is supplied, the standby power supply module is connected with the standby power and is matched with the standby voltage feedback module to adjust the power supply voltage of the standby power supply module until the power supply voltage of the standby power supply module reaches the voltage threshold;
when the power supply state of the main power supply is changed from a normal state to an abnormal state, the first control circuit disconnects the main power voltage feedback module from the main power supply module, so that the main power voltage feedback module is disabled; when the power supply state is switched from the abnormal state to the normal state, and the second control circuit controls the standby power supply module to reduce the power supply voltage of the standby power, the first control circuit is communicated with the connection between the main power voltage feedback module and the main power supply module, so that the second control circuit reduces the power supply voltage of the standby power and then the main power voltage feedback module takes effect, and the situation that the main power voltage feedback module detects the power supply voltage of the standby power supply module reaching the voltage threshold value, and the power supply voltage of the main power supply module cannot be increased to the voltage threshold value any more is avoided.
Optionally, the main power supply module 101 includes a voltage control chip, and the voltage control chip is provided with a compensation pin;
wherein, the voltage control chip is used for: when the compensation pin is not suspended, adjusting the power supply voltage of the main power supply module 101 to the voltage threshold value based on the main electrical feedback signal; when the compensation pin is empty, the main power supply module 101 is blocked.
It should be noted that, after the main power supply module is locked, the main power supply module is in a locked state, and in this state, the main power supply module does not adjust the power supply voltage according to the main electrical feedback signal.
Specifically, the voltage control chip may be a PWM control chip, or other types of chips capable of controlling voltage, and is not limited herein.
Optionally, the main power supply module 101 includes a flyback power supply circuit.
In one application scenario, the main power supply module 101 further includes: a photoelectric coupler;
the above-mentioned photoelectric coupler includes: a light receiver, a light emitting source;
the first control circuit 105 includes: a first switching transistor;
the compensation pin is connected with the input end of the light receiver, the base electrode of the first switching triode is connected with the output end of the main power supply or the main power supply module, the collector electrode of the first switching triode is connected with the output end of the light receiver, and the emitter electrode of the first switching triode is grounded;
the input terminal and the output terminal of the light receiver are turned on when the output voltage collected by the main voltage feedback module 103 reaches the voltage threshold.
It should be noted that, when the main power is normal, that is, when the first switching transistor is turned on, the photocoupler is divided into three states: an on state, a linear working state and an off state;
for example, when the output voltage collected by the main voltage feedback module is 0 v, the photoelectric coupler is in a cut-off state, and the main feedback signal received by the compensation pin is about 6 v; when the output voltage acquired by the main electric voltage feedback module is greater than 0 volt but less than the voltage threshold, the photoelectric coupler is in a linear working state, namely the photoelectric coupler works in a linear working area, and the main electric feedback signal received by the compensation pin is about 2-4 volts; when the output voltage collected by the main electric voltage feedback module reaches the voltage threshold, the photoelectric coupler is in a conducting state, and the main electric feedback signal received by the compensation pin is 0 volt (namely the compensation pin is grounded); and the main power supply module adjusts the power supply voltage of the main power supply module according to the magnitude of the main power feedback signal.
Optionally, the second control circuit 106 includes: a contention deferral circuit;
the input end of the contention deferral circuit is connected with the output end of the main power supply module, and the output end of the contention deferral circuit is connected with the standby power voltage feedback module 104;
the contention deferral circuit is configured to increase the output voltage collected by the standby voltage feedback module 104 when the power supply state is a normal state.
Specifically, as shown in fig. 2-a, the photocoupler 201 includes a light receiver 2011 and a light emitting source 2012, two ends of the light emitting source 2012 are connected to a main electrical voltage feedback circuit in the main electrical voltage feedback module, an input end of the light receiver 2011 is connected to a compensation pin of the voltage control chip, an output end of the light receiver 2011 is connected to a collector of the first switching transistor 202, the main electrical power is connected to the voltage control chip and a base of the first switching transistor 202, and an emitter of the first switching transistor 202 is grounded. It should be noted that, as shown in fig. 2-a, when the main power exists, the first switching transistor 202 is turned on, and the main power supply module and the main voltage feedback module operate normally; when the main power does not exist, the first switching triode 202 is cut off, the compensation pin is suspended, so that the connection between the main power supply module and the main voltage feedback module is disconnected, and the main voltage feedback module fails.
It should be noted that, in fig. 2-a, the base of the first switching transistor is connected to the main power supply, and in practical applications, the base of the first switching transistor may also be connected to the output terminal of the main power supply module, so as to achieve the technical effect that the first switching transistor is turned on when the main power supply exists.
Specifically, as shown in fig. 2-b, an input end of the contention deferral circuit 203 is connected to an output end of the main power supply module, an output end of the contention deferral circuit 203 is connected to the standby power voltage feedback module, and the contention deferral circuit 203 specifically includes: the anode of the first diode 2031 is an input terminal of the contention deferral circuit 203, the cathode of the first diode 2031 is connected to one end of the first resistor 2032, the other end of the first resistor 2032 is connected to the anode of the first capacitor 2033, one end of the second resistor 2034, and the anode of the second diode 2035, the cathode of the first capacitor 2033 and the other end of the second resistor 2034 are respectively grounded, the cathode of the second diode 2035 is connected to one end of the third resistor 2036, and the other end of the third resistor 2036 is an output terminal of the contention deferral circuit 203. Note that, when the master does not exist, the contention backoff circuit 203 is disabled; when the main power exists, the contention deferral circuit 203 may increase the output voltage collected by the standby power voltage feedback module.
In another application scenario, the standby power supply module 102 includes an enable pin;
the standby power supply module 102 is in effect when the input voltage of the enable pin is at a high level, and the standby power supply module 102 is disabled when the input voltage of the enable pin is at a low level;
the second control circuit 106 is specifically configured to: and when the power supply state is converted from the abnormal state to the normal state, the input voltage of the enable pin is switched from a high level to a low level.
Optionally, the power supply control circuit further includes: and a negative voltage generating circuit for connecting with the output end of the main power supply module and outputting a negative voltage when the power supply state is a normal state.
Further, the second control circuit 106 includes: a voltage regulator diode;
the enabling pin of the standby power supply module 102 is respectively connected with the anode of the voltage regulator diode and the standby power;
the negative electrode of the voltage stabilizing diode is connected with the output end of the negative voltage generating circuit;
the zener diode is reversely broken down when the negative voltage exists, so as to switch the input voltage of the enable pin from a high level to a low level.
Further, the main power supply module 101 further includes: a photoelectric coupler;
the above-mentioned photoelectric coupler includes: a light receiver, a light emitting source;
the first control circuit 105 includes: a second switching transistor;
the compensation pin is connected to an input terminal of the light receiver, an output terminal of the light receiver is grounded, a base of the second switching transistor is connected to an output terminal of the power supply control circuit and an output terminal of the negative voltage generation circuit, respectively, a collector of the second switching transistor is connected to the main voltage feedback module 103, and an emitter of the second switching transistor is grounded;
the input end and the output end of the light receiver are conducted when a first condition is met, and the photoelectric coupler works in a linear working area or is cut off when the first condition is not met;
the second switching transistor is turned off when the negative voltage exists and is turned on when the negative voltage does not exist;
the first condition is: the second switching transistor is turned off, and the output voltage collected by the main voltage feedback module 103 reaches the voltage threshold.
Specifically, as shown in fig. 3, the negative voltage generation circuit 301 specifically includes: the negative electrode of the third diode 3011 is an input end of the negative voltage generation circuit 301, the input end of the negative voltage generation circuit 301 is connected to the output end of the main power supply module, the positive electrode of the third diode 3011 is connected to one end of the fourth resistor 3012, the other end of the fourth resistor 3012 is connected to the positive electrode of the second capacitor 3013 and one end of the fifth resistor 3014, the negative electrode of the second capacitor 3013 is grounded, the other end of the fifth resistor 3014 is connected to the negative electrode of the first zener diode 3015 and the positive electrode of the third capacitor 3016, the positive electrode of the first zener diode 3015 and the negative electrode of the third capacitor 3016 are grounded, and the other end of the fifth resistor 3014 is an output end of the negative voltage generation circuit 301. Note that, when the main power is not present, the output terminal of the negative voltage generation circuit 301 does not output a negative voltage; in the presence of main electricity, the output terminal of the negative voltage generation circuit 301 outputs a negative voltage.
Specifically, as shown in fig. 3, the voltage regulator transistor is a second voltage regulator diode 3022, an input end of the second control circuit 302 is connected to an output end of the negative voltage generating circuit 301, an output end of the second control circuit 302 is connected to an enable pin of the standby power supply module, and the second control circuit 302 specifically includes: a cathode of the second zener diode 3022 is an input terminal of the second control circuit 302, an anode of the second zener diode 3022 is connected to one end of the sixth resistor 3021 and one end of the seventh resistor 3023, respectively, the other end of the sixth resistor 3021 is connected to the backup power, the other end of the seventh resistor 3023 is connected to one end of the eighth resistor 3024, the other end of the eighth resistor 3024 is grounded, and the other end of the seventh resistor 3023 is an output terminal of the second control circuit 302. When the main power is not available, the output end of the negative voltage generation circuit 301 does not output a negative voltage, and the second control circuit 302 operates normally; when the main power exists, the output end of the negative voltage generation circuit 301 outputs a negative voltage, the second zener diode 3022 breaks down in the reverse direction, the enable pin of the standby power supply module is short-circuited, that is, the input voltage of the enable pin is at a low level, and the standby power supply module fails.
Specifically, as shown in fig. 3, an input end of the first control circuit 303 is connected to an output end of the negative voltage generating circuit 301, an output end of the first control circuit 303 is connected to the main voltage feedback module, and the first control circuit 303 specifically is: one end of a ninth resistor 3031 is an input end of the first control circuit 303, the other end of the ninth resistor 3031 is respectively connected with one end of a tenth resistor 3032 and a base of a second switching diode 3033, the other end of the tenth resistor 3032 is connected with the output voltage, an emitter of the second switching diode 3033 is grounded, a collector of the second switching diode 3033 is respectively connected with an anode of a fourth capacitor 3034 and one end of an eleventh resistor 3035, a cathode of the fourth capacitor 3034 is grounded, and the other end of the eleventh resistor 3035 is an output end of the first control circuit 303. It should be noted that, when the main power is not available, the output end of the negative voltage generating circuit 301 does not output a negative voltage, the second switching diode 3033 is turned on, the main power voltage feedback module receives the low level sent by the first control circuit 303, and then the main power voltage feedback module fails; when the main power exists, the output end of the negative voltage generating circuit 301 outputs a negative voltage, the second switching diode 3033 is turned off, and the main power voltage feedback module works normally.
Optionally, the power supply control circuit is applied to a power supply circuit of a power supply chip.
Optionally, the main power is mains power.
Therefore, the power supply control circuit provided by the application adopts the mode of additionally arranging the first control circuit and the second control circuit, and correspondingly controls the main power voltage feedback module, the main power supply module, the standby power voltage feedback module and the standby power supply module according to different situations on the premise that the voltage output requirement of standby power is the same as that of the main power, so that the competition phenomenon of the main power supply and the standby power supply is avoided, the technical effect of ensuring that the standby power supply is recovered to the main power supply when the main power is recovered to be normal is achieved, and the reliability of the power supply control circuit is enhanced.
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.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned functions may be distributed as different functional units and modules according to needs, that is, the internal structure of the apparatus may be divided into different functional units or modules to implement all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
It should be noted that, the methods and the details thereof provided by the foregoing embodiments may be combined with the apparatuses and devices provided by the embodiments, which are referred to each other and are not described again.
Those of ordinary skill in the art would appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described apparatus/device embodiments are merely illustrative, and for example, the division of the above-described modules or units is only one logical functional division, and the actual implementation may be implemented by another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (8)
1. A power supply control circuit, comprising: the system comprises a main power supply module, a main power voltage feedback module, a standby power supply module, a standby power voltage feedback module, a first control circuit and a second control circuit;
the main electric voltage feedback module is used for acquiring the real-time output voltage of the power supply control circuit and sending a main electric feedback signal to the main electric power supply module based on the output voltage;
the standby power supply voltage feedback module is used for acquiring the output voltage and sending a standby power supply feedback signal to the standby power supply module based on the output voltage;
the main power supply module is used for adjusting the power supply voltage of the main power supply module to reach a preset voltage threshold value based on the main power feedback signal so as to enable the output voltage to reach the voltage threshold value;
the standby power supply module is used for adjusting the power supply voltage of the standby power supply module to reach the voltage threshold value based on the standby power feedback signal so as to enable the output voltage to reach the voltage threshold value;
the first control circuit is used for disconnecting the main power supply voltage feedback module from the main power supply module when the power supply state of the main power supply is converted from a normal state to an abnormal state; when the power supply state is switched from an abnormal state to a normal state, and the second control circuit controls the standby power supply module to reduce the power supply voltage of the standby power, the connection between the main power voltage feedback module and the main power supply module is communicated;
the second control circuit is used for reducing the power supply voltage of the standby power supply module when the power supply state is converted from an abnormal state to a normal state.
2. The power supply control circuit according to claim 1, wherein the main power supply module comprises a voltage control chip, and a compensation pin is arranged on the voltage control chip;
wherein, the voltage control chip is used for: when the compensation pin is not suspended, adjusting the power supply voltage of the main power supply module to the voltage threshold value based on the main power feedback signal; and when the compensation pin is suspended, the main power supply module is blocked.
3. The power supply control circuit of claim 2 wherein the power backup power module includes an enable pin;
the standby power supply module takes effect when the input voltage of the enabling pin is at a high level, and the standby power supply module fails when the input voltage of the enabling pin is at a low level;
the second control circuit is specifically configured to: and when the power supply state is converted from an abnormal state to a normal state, switching the input voltage of the enable pin from a high level to a low level.
4. The power supply control circuit of claim 3, further comprising: and the negative voltage generating circuit is used for being connected with the output end of the main power supply module and outputting negative voltage when the power supply state is a normal state.
5. The power supply control circuit of claim 4, wherein the second control circuit comprises: a voltage regulator diode;
the enabling pin of the standby power supply module is respectively connected with the anode of the voltage stabilizing diode and the standby power supply;
the negative electrode of the voltage stabilizing diode is connected with the output end of the negative voltage generating circuit;
the voltage stabilizing diode breaks down reversely when the negative voltage exists so as to switch the input voltage of the enabling pin from a high level to a low level.
6. The power supply control circuit of claim 4 wherein said main voltage feedback module further comprises: a photoelectric coupler;
the photocoupler includes: a light receiver, a light emitting source;
the first control circuit includes: a second switching transistor;
the compensation pin is connected with the input end of the light receiver, the output end of the light receiver is grounded, the base electrode of the second switching triode is respectively connected with the output end of the power supply control circuit and the output end of the negative voltage generation circuit, the collector electrode of the second switching triode is connected with the main electric voltage feedback module, and the emitter electrode of the second switching triode is grounded;
the input end and the output end of the light receiver are conducted when a first condition is met, and the photoelectric coupler works in a linear working area or is cut off when the first condition is not met;
the second switching transistor is turned off when the negative voltage exists and is turned on when the negative voltage does not exist;
the first condition is: and the second switching triode is cut off, and the output voltage collected by the main electric voltage feedback module reaches the voltage threshold value.
7. The power supply control circuit according to any one of claims 2 to 6, wherein the voltage control chip is specifically a PWM control chip.
8. The power supply control circuit according to any one of claims 1 to 6, wherein the power supply control circuit is applied to a power supply circuit of a power supply chip.
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| CN202110410277.1A CN113437792A (en) | 2019-12-13 | 2019-12-13 | Power supply control circuit |
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| CN201911285878.3A CN111009958B (en) | 2019-12-13 | 2019-12-13 | Power supply control circuit |
| CN202110410277.1A CN113437792A (en) | 2019-12-13 | 2019-12-13 | Power supply control circuit |
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| CN111009958B (en) | 2021-04-27 |
| CN111009958A (en) | 2020-04-14 |
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