CN115940587A - Power supply, output load regulation rate compensation circuit thereof and voltage regulation method - Google Patents
Power supply, output load regulation rate compensation circuit thereof and voltage regulation method Download PDFInfo
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Abstract
The invention discloses a power supply, an output load regulation rate compensation circuit and a voltage regulation method thereof, and relates to the technical field of power supplies. The circuit includes: the state monitoring module is used for detecting the power supply state, generating a corresponding control signal according to the power supply state and switching the power supply working mode according to the control signal; the current control module is used for generating a corresponding sampling signal according to the working mode and the control signal; sampling and amplifying the power output current according to the sampling signal; performing compensation processing on the sampling signal to generate a compensation signal; the voltage feedback module is used for monitoring the output voltage of the reverse input end of the voltage error amplifier in real time; the voltage regulating module is used for regulating the output voltage of the power supply by regulating the reference voltage. The invention distinguishes the no-load state, the light load state and the heavy load state by detecting the power supply state, samples the output current of the power supply in the load state, adjusts the output voltage and realizes the compensation of the power supply output load regulation rate.
Description
Technical Field
The invention belongs to the technical field of power supplies, and particularly relates to a power supply, an output load regulation rate compensation circuit and a voltage regulation method thereof.
Background
With the rapid development of electronic technology, the performance requirements of various electronic and electrical equipment on voltage stabilization are also correspondingly improved, and especially, a direct-current stabilized voltage supply is integrated inside some chips to improve stable voltage support inside the chips.
The power supply for communication usually constitutes a system with various capacities to supply power to loads, different loads have different requirements on the load regulation rate of the power supply, and the requirement on the load regulation rate by the industry standard of the high-frequency switching rectifier for communication is not more than 0.5%, but some equipment have higher requirement on the regulation rate of the power supply.
A load refers to an electronic component connected across a power source in an electrical circuit for converting electrical energy into other forms of energy. Commonly used loads are resistors, engines, light bulbs, and other power consuming components.
The load regulation rate is an important index of the regulated power supply, which represents a corresponding change condition of the output voltage of the regulated power supply when the load current changes, and is usually represented by a percentage value of the output voltage and a change amount of the output voltage when the output current changes from 0 to a rated maximum current. Its variation causes a variation in the power supply output, load up, output down, and conversely load down, output up. Good power supply load variations cause small output variations, typically on the order of 3% to-5%. The load regulation rate is an index for measuring the quality of the power supply. And when the good power supply output is connected with a load, the voltage drop is small.
The line resistance and the plug-in resistance in the circuit have a great influence on the power load regulation rate, and most power supplies in the prior art do not effectively improve the influence caused by the resistance. Most of the improvements on the regulation rate of the power supply load do not distinguish the state of the power supply, such as distinguishing the no-load state from the load state of the power supply; meanwhile, the output load regulation rate of the power supply under light load and heavy load states is not compensated.
Disclosure of Invention
The invention aims to provide an output load regulation compensation circuit of a power supply, which distinguishes no-load and load through detection of the power supply state, distinguishes light load and heavy load in the load state, samples the output current of the power supply in the load state and realizes compensation of the output load regulation of the power supply through calculating compensation voltage.
The purpose of the invention can be realized by the following technical scheme:
in a first aspect, an embodiment of the present application provides an output load regulation compensation circuit for a power supply, including a state monitoring module, a current control module, a voltage feedback module, and a voltage regulation module, which are connected in sequence;
the state monitoring module comprises a detection unit and a switching unit, wherein when the detection unit detects that the power supply is in an idle state, the detection unit generates an idle control signal and switches to an idle working mode; when the detection unit detects that the power supply is in a loaded state, a loaded control signal is generated and is switched to a loaded working mode;
the current control module comprises a sampling unit and a signal unit;
the sampling unit is connected with the signal unit and used for sampling the output current of the power supply according to the on-load control signal, generating a sampling signal and outputting the sampling signal to the signal unit;
the signal unit is used for performing compensation processing on the sampling signal to generate a compensation signal and sending the compensation signal to the voltage feedback module;
the voltage feedback module is connected with the reverse input end of the voltage error amplifier and is used for monitoring the output voltage of the reverse input end of the voltage error amplifier in real time;
the voltage regulating module is connected with the equidirectional input end of the voltage error amplifier and used for regulating the output voltage of the power supply by regulating the reference voltage of the equidirectional input end of the voltage error amplifier.
As a preferred technical scheme of the invention, the detection unit comprises a main control circuit and a no-load circuit;
the main control circuit is used for providing an electric signal and controlling the load to operate;
the no-load circuit is electrically coupled to the load and is used for detecting whether the power supply is in an no-load state or not and generating an no-load control signal;
and the main control circuit receives the no-load control signal and controls the power supply to switch to the no-load working mode.
As a preferred technical solution of the present invention, the switching unit includes a tape carrier circuit and a tape carrier module;
the load circuit is connected with the no-load circuit and used for detecting whether the power supply is in a load state or not and generating a load control signal; the main control circuit receives the load control signal, controls the power supply to switch to a load working mode, supplies current to the load and controls the load to operate;
wherein the loaded working mode comprises a heavy load mode and a light load mode; the on-load control signal comprises a heavy-load signal and a light-load signal;
the load component is used for judging the connection state of the load; the connection state of the load includes: normal connected and unconnected; and the load circuit switches the working state according to the connection state of the load.
As a preferred technical solution of the present invention, the switching unit further includes a switching circuit, connected to the on-load circuit, and configured to switch the on-load working mode to the heavy-load mode according to the heavy-load signal and switch the on-load working mode to the light-load mode according to the light-load signal;
wherein, in the light load mode, the power supply is in an intermittent state; in the heavy-load mode, the power supply is in a forced conducting state; and when the light-load mode jumps to the heavy-load mode or the heavy-load mode jumps to the light-load mode, the power supply is in a continuous state.
As a preferred technical scheme of the present invention, the sampling unit includes a shunt, a plurality of voltage collectors and a plurality of current collectors, the plurality of current collectors are connected in series, and the voltage collectors are connected in parallel with the current collectors; the signal unit proportionally attenuates the sampled signal to form the compensated signal.
As a preferred technical solution of the present invention, the current control module further includes an amplifying unit, and the amplifying unit is connected to the sampling unit and is configured to amplify an output current of the power supply.
As a preferred technical solution of the present invention, the circuit further includes a filter capacitor, a filter inductor, and a rectifier diode;
one end of the filter capacitor is grounded, and the other end of the filter capacitor is connected to the output voltage;
the filter inductor is connected to the output voltage and is used for filtering the output voltage;
and the rectifier diode is connected with the filter inductor and used for rectifying the input voltage before filtering.
In a second aspect, an embodiment of the present application provides a voltage adjustment method of an output load regulation compensation circuit of a power supply as described above, including the following steps:
detecting a power state, and generating a corresponding control signal according to the power state;
switching a power supply working mode according to the control signal;
generating a corresponding sampling signal according to the working mode and the control signal;
sampling and amplifying the power output current according to the sampling signal;
performing compensation processing on the sampling signal to generate a compensation signal;
monitoring the output voltage of the power supply in real time according to the compensation signal;
and adjusting the output voltage of the power supply according to the compensation signal.
In a third aspect, an embodiment of the present application provides a power supply with a load compensation function, which includes a power supply circuit, and further includes an output load regulation compensation circuit of the power supply as described above, where the power supply circuit is connected to the output load regulation compensation circuit of the power supply.
The invention has the beneficial effects that:
and detecting the power supply state, distinguishing the idle load state from the load state, and switching the power supply working mode according to different states.
And distinguishing the load state to distinguish a light load state from a heavy load state.
Sampling is carried out aiming at the output current under the power supply load state, and the compensation of the power supply output load regulation rate is realized by adjusting the reference voltage.
Drawings
For a better understanding and implementation, the technical solutions of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a block diagram of an output load regulation compensation circuit of a power supply according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a detection unit according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a switching unit according to an embodiment of the present application;
fig. 4 is a schematic diagram of a power output load regulation compensation circuit according to an embodiment of the present disclosure;
fig. 5 is a flowchart illustrating a voltage adjustment method of a power output load regulation factor compensation circuit according to an embodiment of the present disclosure.
Detailed Description
To further clarify the technical measures and effects of the present invention taken to achieve the objects defined by the invention, there will be described in detail herein an exemplary embodiment thereof, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of methods and systems consistent with certain aspects of the application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this 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. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The following detailed description of embodiments, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1, the present invention provides a compensation circuit for output load regulation rate of a power supply, which includes a state monitoring module 1, a current control module 2, a voltage feedback module 3, and a voltage regulation module 4, which are connected in sequence;
the state monitoring module 1 comprises a detection unit 10 and a switching unit 11, when the detection unit 10 detects that the power supply is in an idle state, an idle control signal is generated, and the idle control signal is switched to an idle working mode; when the detection unit 10 detects that the power supply is in a loaded state, a loaded control signal is generated and is switched to a loaded working mode;
the current control module 2 comprises a sampling unit 20 and a signal unit 21;
the sampling unit 20 is connected with the signal unit 21, and is configured to sample an output current of the power supply according to the on-load control signal, generate a sampling signal, and output the sampling signal to the signal unit 21;
the signal unit 21 is configured to perform compensation processing on the sampling signal 20, generate a compensation signal, and send the compensation signal to the voltage feedback module 3;
the voltage feedback module 3 is connected with the reverse input end of the voltage error amplifier and is used for monitoring the output voltage of the reverse input end of the voltage error amplifier in real time;
the voltage regulating module 4 is connected to the non-inverting input terminal of the voltage error amplifier, and is configured to regulate the output voltage of the power supply by regulating the reference voltage at the non-inverting input terminal of the voltage error amplifier.
Specifically, the power supply circuit is monitored to determine which state the power supply is in. If the load in the circuit does not run, the power supply is in an idle state, the current in the circuit is stable, and the output voltage cannot change greatly; if the load in the circuit is running, the power supply is in a load state, and when the power supply is in the load state, the current in the circuit can change, so that the output voltage changes, and the power supply load regulation rate further changes. Furthermore, the output current of the circuit under the loaded state is sampled, a sampling signal is generated and sent to the signal unit, the signal unit can perform compensation processing on the sampling signal to generate a compensation signal, compensation voltage is generated according to the compensation signal, the compensation voltage is amplified by the voltage error amplifier, and the output voltage of the voltage is finally adjusted by the voltage adjusting module. The regulated output voltage can not generate great fluctuation change, so that the change of the power supply load regulation rate can not be caused.
Referring to fig. 2, in an embodiment of the present invention, the detecting unit 10 includes a main control circuit 101 and a no-load circuit 102;
the main control circuit 101 is used for providing an electric signal and controlling the load to operate;
the no-load circuit 102 is electrically coupled to the load, and is used for detecting whether the power supply is in an no-load state and generating an no-load control signal;
the main control circuit 101 receives the idle control signal, and controls the power supply to switch to the idle operation mode.
Specifically, the detection unit detects a power circuit in real time, and when the power circuit is detected to be in an idle state, the circuit is switched to an idle circuit, and an idle control signal is generated and sent to the switching unit; the main control circuit switches the working mode to a no-load control mode according to the no-load control signal; the idle circuit is electrically coupled to the load, and when the power supply is in an idle state, the main control circuit does not send out an electric signal, so that the load is not in an operating state.
Referring to fig. 3, in an embodiment of the invention, the switching unit 11 includes a tape carrier circuit 110 and a tape carrier assembly 111;
the load circuit 110 is connected to the no-load circuit 102, and is configured to detect whether the power supply is in a load state, and generate a load control signal; the main control circuit 101 receives the on-load control signal, controls the power supply to switch to the on-load working mode, supplies current to the load and controls the load to operate;
the on-load working mode comprises a heavy load mode and a light load mode; the on-load control signal comprises a heavy-load signal and a light-load signal;
the load component 111 is used for judging the connection state of the load; the connection state of the load includes: normal connected and unconnected; the on-load circuit 110 switches the operating state according to the connection state of the load.
Specifically, the switching unit is mainly used for switching the control circuit according to the power state. The switching unit receives the no-load control signal sent by the detection unit, and then switches the power supply circuit to the no-load circuit according to the no-load control signal; the switching unit comprises a load circuit, and the load circuit is connected with the detection unit, specifically connected with the no-load circuit. When the detection unit detects that the power supply is in a loaded state, the main control circuit sends an electric signal to control the load to operate, and simultaneously, the circuit is switched to the loaded circuit to generate a loaded control signal and send the loaded control signal to the main control circuit; the main control circuit receives the load control signal and controls the power supply to switch to a load working mode, and the load normally runs in the load working mode.
Further, the on-load working mode is divided into a heavy-load mode and a light-load mode, and similarly, the on-load control signal is also divided into a heavy-load signal and a light-load signal; the heavy-load signal corresponds to a heavy-load mode, and the light-load signal corresponds to a light-load signal. It should be noted that the heavy load mode and the light load mode are switchable to each other.
Furthermore, the switching unit also comprises a loading component which judges the connection state of the load so as to switch the corresponding working state according to the corresponding load state; the load component switches between two operating states based on the connection state of the load. When the connection state of the load is normal connection, switching the loaded circuit to a second working state; when the load is not connected, the loaded circuit is switched to a first working state. In a first working state, the load circuit outputs signals with preset frequency and preset duty ratio; in the second working state, the loading circuit continuously outputs high level.
In an embodiment of the present invention, the switching unit 11 further includes a switching circuit 112, where the switching circuit 112 is connected to the tape carrier circuit 110, and is configured to switch the tape carrier operating mode to the heavy-load mode according to the heavy-load signal, and switch the tape carrier operating mode to the light-load mode according to the light-load signal;
wherein, in the light load mode, the power supply is in an intermittent state; in the heavy-load mode, the power supply is in a forced conduction state; and when the light load mode jumps to the heavy load mode or the heavy load mode jumps to the light load mode, the power supply is in a continuous state.
Specifically, the switching unit realizes switching between a heavy load mode and a light load mode through the adapter circuit. When a heavy load signal is received, the load working mode is switched to the heavy load mode, and when a light load signal is received, the load working mode is switched to the light load mode.
Further, when the load is in a heavy-load mode, the power supply is in a forced conduction state, and at the moment, the power supply forcibly conducts the circuit and outputs a strong voltage; when the load is in a light load mode, the power supply is in an intermittent state, and the output voltage is not stable enough; when the load jumps from a heavy load mode to a light load mode, the output voltage and current of the power supply are reduced and become unstable, and at the moment, the power supply enters a continuous state from a forced conduction state and enters an interrupted state after a preset time; when the load jumps from a light load mode to a heavy load mode, the power supply enters a continuous state from an interrupted state, continuously and stably outputs voltage and current, and enters a forced conduction state after a preset time.
In an embodiment provided by the present invention, the sampling unit 20 includes a shunt, a plurality of voltage collectors and a plurality of current collectors, the plurality of current collectors are connected in series, and the voltage collectors are connected in parallel with the current collectors; the signal unit 20 proportionally attenuates the sampled signal to form the compensation signal.
In an embodiment provided by the present invention, the current control module 2 further includes an amplifying unit 21, and the amplifying unit 21 is connected to the sampling unit 20 and is configured to amplify the output current of the power supply.
Specifically, the current collector is connected in series in the power circuit and used for collecting current in the circuit, the current collector comprises a plurality of current collectors, and each current collector comprises an internal resistance, so that the current collector can also provide a certain resistance for the power circuit; the voltage collector is connected with the current collector in parallel and used for collecting the voltage at two ends of the current collector. When the power supply is in a light load mode, the power supply is in an intermittent state at the moment, and the current in the circuit is very small, so that the current collector is required to collect the current, and then the voltage collector is used for collecting the voltage. Because the current collector and the voltage collector are multiple in the embodiment of the application, the output current of the power circuit can be obtained by dividing the voltage collected by the multiple voltage collectors by the internal resistance in the multiple current collectors.
Furthermore, after the current control module utilizes the sampling unit to sample the output current of the circuit, a sampling signal is generated, and the output current is amplified through the amplifying unit; and the signal unit performs compensation processing on the output current according to the sampling signal to generate a compensation signal. The compensation processing specifically comprises the following steps: the signal unit receives the amplified output current, and because the power circuit also has the line internal resistance and other resistances besides the internal resistance of the current collector, all the resistances in the circuit are added together to be integrated into a total resistance, and the output current and the total resistance are used for carrying out arithmetic operation to obtain the compensation voltage.
In an embodiment provided by the present invention, the circuit further includes a signal filtering module 5, and the signal filtering module 5 is connected to the current control module 2, and is configured to filter the compensation signal and output the filtered compensation signal to the voltage feedback module 3.
In particular, the compensation signal is filtered by the signal filtering module 5 for filtering out noise in the compensation signal, because the signal-to-noise ratio is different in different output current situations. In no-load and light-load conditions, the noise signal is relatively large, and the specific conditions need to be judged according to the structure of the transformer, the size of the coupling capacitor determined by the winding mode, the size of the electric pin of the switch working frequency and the size of the output inductor. The signal filtering module plays a great role in normal and stable operation of the power supply.
In one embodiment provided by the invention, the circuit further comprises a filter capacitor, a filter inductor and a rectifier diode;
one end of the filter capacitor is grounded, and the other end of the filter capacitor is connected to the output voltage;
the filter inductor is connected to the output voltage and used for filtering the output voltage;
the rectifier diode is connected with the filter inductor and used for rectifying the input voltage before filtering.
Referring to fig. 4, specifically, the circuit of the current control module 2 is composed of a current divider R6, a current collector R7 and a voltage collector R8; the signal filtering module 5 is composed of a resistor R5 and a capacitor C2; the voltage feedback module 3 is composed of a resistor R3 and a resistor R5; the voltage adjusting module 4 consists of an adjustable potentiometer RP1, a resistor R4 and a resistor R5; the total resistance in the output circuit is equivalent by the resistor R1 and the resistor R2.
In the circuit provided in this embodiment, a cathode of the rectifying diode VD1 is connected to one end of the filter inductor L1, and the other end of the filter inductor L1, one end of the capacitor C1, one end of the resistor R1, and one end of the resistor R3 are connected to V +; the other end of the capacitor C1 is connected with a power ground GDN; the other end of the resistor R1 is connected with one end of the capacitor C3 at V +; the other end of the resistor R3 is connected with one end of the adjustable potentiometer RP 1; the other end of the adjustable potentiometer RP1 and one end of the resistor R5 are connected with one end of the capacitor C2; the other end of the capacitor C2 and the other end of the capacitor C1 are connected with a power ground GND; the other end of the resistor R5 is connected with one end of a voltage collector R8; the other end of the voltage collector R8 is connected with one end of the current collector R7; the other end of the current collector R7 is connected with one end of the current divider R6; the other end of the shunt R6 is connected with one end of the resistor R2; the other end of the resistor R2 is connected with the other end of the capacitor C2 at V-.
According to the invention, no-load and load are distinguished by detecting the power supply state, and the power supply working mode is switched according to different states; and distinguishing light load and heavy load in a load state, sampling the output current of the power supply in the load state, and compensating the output load regulation rate of the power supply by adjusting reference voltage.
Referring to fig. 5, an embodiment of the invention provides a voltage adjustment method for an output load regulation compensation circuit of a power supply, including the following steps:
s101, detecting a power supply state, and generating a corresponding control signal according to the power supply state;
s102, switching the working mode of the power supply according to the control signal;
s103, generating a corresponding sampling signal according to the working mode and the control signal;
s104, sampling and amplifying the power output current according to the sampling signal;
s105, performing compensation processing on the sampling signal to generate a compensation signal;
s106, monitoring the output voltage of the power supply in real time according to the compensation signal;
and S107, adjusting the output voltage of the power supply according to the compensation signal.
Specifically, the power supply circuit is monitored, the state of the power supply is judged, and a corresponding control signal is generated according to the state of the power supply. If the load in the circuit does not run, the power supply is in a no-load state to generate a no-load control signal, the current in the circuit is stable, and the output voltage cannot change greatly; if the load in the circuit is running, the power supply is in a load state, a load control signal is generated, and when the power supply is in the load state, the current in the circuit can change, so that the output voltage changes, and the regulation rate of the power supply load further changes. Then, the output current of the circuit under the loaded state is sampled, a sampling signal is generated, and the output current is amplified. Further, the amplified output current is compensated, so that a compensation signal is generated, and a compensation voltage is generated according to the compensation signal; and finally, after the voltage error amplifier is used for amplifying, the output voltage of the voltage is finally regulated, so that the output voltage of the power supply is stable. The regulated output voltage can not generate great fluctuation change, so that the change of the power supply load regulation rate can not be caused.
The embodiment of the invention also provides a power supply with a load compensation function, which comprises a power supply circuit and the output load regulation rate compensation circuit of the power supply, wherein the power supply circuit is connected with the output load regulation rate compensation circuit of the power supply.
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 function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. 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.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps 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 invention.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An output load regulation compensation circuit of a power supply, characterized in that: the system comprises a state monitoring module, a current control module, a voltage feedback module and a voltage regulation module which are connected in sequence;
the state monitoring module comprises a detection unit and a switching unit, wherein when the detection unit detects that the power supply is in an idle state, the detection unit generates an idle control signal and switches to an idle working mode; when the detection unit detects that the power supply is in a loaded state, a loaded control signal is generated and is switched to a loaded working mode;
the current control module comprises a sampling unit and a signal unit;
the sampling unit is connected with the signal unit and used for sampling the output current of the power supply according to the on-load control signal, generating a sampling signal and outputting the sampling signal to the signal unit;
the signal unit is used for performing compensation processing on the sampling signal, generating a compensation signal and sending the compensation signal to the voltage feedback module;
the voltage feedback module is connected with the reverse input end of the voltage error amplifier and is used for monitoring the output voltage of the reverse input end of the voltage error amplifier in real time;
the voltage regulating module is connected with the same-direction input end of the voltage error amplifier and used for regulating the output voltage of the power supply by regulating the reference voltage of the same-direction input end of the voltage error amplifier.
2. The output load slew rate compensation circuit of claim 1, wherein: the detection unit comprises a main control circuit and a no-load circuit;
the main control circuit is used for providing an electric signal and controlling the load to operate;
the no-load circuit is electrically coupled to the load and used for detecting whether the power supply is in an no-load state or not and generating an no-load control signal;
and the main control circuit receives the no-load control signal and controls the power supply to switch to the no-load working mode.
3. The output load slew rate compensation circuit of claim 2, wherein: the switching unit comprises a loading circuit and a loading component;
the load circuit is connected with the no-load circuit and used for detecting whether the power supply is in a load state or not and generating a load control signal; the main control circuit receives the load control signal, controls the power supply to switch to a load working mode, supplies current to the load and controls the load to operate;
wherein the loaded working mode comprises a heavy load mode and a light load mode; the on-load control signal comprises a heavy-load signal and a light-load signal;
the load component is used for judging the connection state of the load; the connection state of the load includes: normal connected and unconnected; and the load circuit switches the working state according to the connection state of the load.
4. The output load regulation rate compensation circuit of claim 3, wherein: the switching unit further comprises a switching circuit, wherein the switching circuit is connected with the load circuit and is used for switching the load working mode to the heavy load mode according to the heavy load signal and switching the load working mode to the light load mode according to the light load signal;
wherein, in the light load mode, the power supply is in an intermittent state; in the heavy-load mode, the power supply is in a forced conducting state; and when the light-load mode jumps to the heavy-load mode or the heavy-load mode jumps to the light-load mode, the power supply is in a continuous state.
5. The output load slew rate compensation circuit of claim 1, wherein: the sampling unit comprises a current divider, a plurality of voltage collectors and a plurality of current collectors, wherein the plurality of current collectors are connected in series, and the voltage collectors are connected with the current collectors in parallel; the signal unit proportionally attenuates the sampled signal to form the compensated signal.
6. The output load slew rate compensation circuit of claim 1, wherein: the current control module further comprises an amplifying unit, and the amplifying unit is connected with the sampling unit and used for amplifying the output current of the power supply.
7. The output load regulation rate compensation circuit of claim 1, wherein: the voltage feedback module is connected with the current control module, and is used for outputting the compensation signal to the voltage feedback module.
8. The output load slew rate compensation circuit of claim 1, wherein: the filter circuit also comprises a filter capacitor, a filter inductor and a rectifier diode;
one end of the filter capacitor is grounded, and the other end of the filter capacitor is connected to the output voltage;
the filter inductor is connected to the output voltage and used for filtering the output voltage;
and the rectifier diode is connected with the filter inductor and used for rectifying the input voltage before filtering.
9. A voltage regulation method of an output load regulation rate compensation circuit of a power supply according to claim 1, characterized in that: the method comprises the following steps:
detecting a power state, and generating a corresponding control signal according to the power state;
switching a power supply working mode according to the control signal;
generating a corresponding sampling signal according to the working mode and the control signal;
sampling and amplifying the power output current according to the sampling signal;
performing compensation processing on the sampling signal to generate a compensation signal;
monitoring the output voltage of the power supply in real time according to the compensation signal;
and adjusting the output voltage of the power supply according to the compensation signal.
10. A power supply with load compensation, comprising a power supply circuit, characterized in that: the power supply further comprises an output load regulation rate compensation circuit of the power supply according to any one of claims 1 to 8, wherein the power supply circuit is connected with the output load regulation rate compensation circuit of the power supply.
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