CN111193383A - Power control circuit and electronic device - Google Patents
Power control circuit and electronic device Download PDFInfo
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- CN111193383A CN111193383A CN202010075812.8A CN202010075812A CN111193383A CN 111193383 A CN111193383 A CN 111193383A CN 202010075812 A CN202010075812 A CN 202010075812A CN 111193383 A CN111193383 A CN 111193383A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
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Abstract
The embodiment of the invention provides a power control circuit and electronic equipment. The power control circuit comprises a power conversion output device and a detection circuit connected with the power conversion output device, the power conversion output device comprises a regulation mode selection pin and a voltage output pin, the detection circuit comprises a voltage detection module and a logic processing module, the input end of the voltage detection module is electrically connected with the voltage output pin, the input end of the logic processing module is electrically connected with the output end of the voltage detection module, and the output end of the logic processing module is electrically connected with the regulation mode selection pin. Therefore, the whole process only needs to complete the signal conversion once, and the logic processing module included by the detection circuit can directly feed the electric signal corresponding to the power output mode back to the regulation and control mode selection pin, so that the power output mode can be switched in time according to the load condition, and the response of the power conversion mode is quicker.
Description
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to a power control circuit and an electronic device.
Background
As the functions of the electronic device become more complex, the energy consumption of the load side under different functions is different. In order to improve the endurance time of the electronic device and the user experience, the power output mode needs to be flexibly selected according to different states of the load end.
At present, when a load is in a light load state, the light load state is a state that the energy consumption of the electronic equipment is low under the function, and a power supply processor controls a logic level to enable the logic level to be a low level so as to enable a power output mode to be in a pulse frequency output mode; when the load is in a heavy load state, the heavy load state is a state that the energy consumption of the electronic equipment is large under the function, and the power supply processor controls the logic level to enable the logic level to be a high level, so that the power output mode is in a pulse width output mode.
However, when the load end is changed from a light load state to a heavy load state, the quantization circuit and the feedback circuit are adopted for adjustment, the quantization circuit and the feedback circuit are electrically connected to the output end of the power conversion output device, the analog signal is firstly converted into the digital signal by using the quantization circuit in the conversion process, sampling time is needed in the sampling process, the digital signal needs to be quantized again after the sampling is completed, and certain quantization time is also needed. After the quantization is finished, the feedback signal is firstly fed back to the processor through the feedback circuit, and then the processor feeds back the feedback signal to the regulation mode selection pin, so that certain delay is caused when the power conversion output device carries out mode adjustment, the transient response of the power conversion output device is poor when the load mode is switched, and the power output mode cannot be switched in time according to the load condition. Therefore, on one hand, the electronic equipment is caused to be in a black screen state or a dead halt state due to slow response, and on the other hand, when the load is converted from a light load state to a heavy load state, the electronic equipment cannot be switched in time, so that the energy consumption of the electronic equipment is increased, and the endurance time of the electronic equipment is reduced.
Disclosure of Invention
The embodiment of the invention provides a power control circuit and electronic equipment, which can solve the problem of slow transient response during load mode switching.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a power control circuit, where the power control circuit is electrically connected to a load terminal, the power control circuit includes a power conversion output and a detection circuit connected to the power conversion output, where,
the power conversion output device comprises a regulation mode selection pin and a voltage output pin, wherein the regulation mode selection pin is used for converting the power output mode, and the voltage output pin is used for outputting voltage for the load end;
the detection circuit comprises a voltage detection module and a logic processing module, wherein the input end of the voltage detection module is electrically connected with the voltage output pin, and the voltage detection module is used for detecting the output waveform information of the voltage output pin;
the output end of the voltage detection module is electrically connected with the input end of the logic processing module, the output end of the logic processing module is electrically connected with the regulation and control mode selection pin, and the logic processing module is used for determining the power output mode of the load end and transmitting an electric signal corresponding to the power output mode to the regulation and control mode selection pin, wherein the power output mode comprises a pulse frequency output mode and a pulse width output mode.
In a second aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes the power control circuit described in the foregoing embodiment.
It can be seen from the foregoing embodiments that, in the embodiments of the present invention, the power control circuit includes a power conversion output device and a detection circuit connected to the power conversion output device, the power conversion output device includes a regulation mode selection pin and a voltage output pin, the detection circuit includes a voltage detection module and a logic processing module, an input end of the voltage detection module is electrically connected to the voltage output pin, an input end of the logic processing module is electrically connected to an output end of the voltage detection module, and an output end of the logic processing module is electrically connected to the regulation mode selection pin. Therefore, the voltage detection module can monitor the output waveform information of the voltage output pin of the power conversion output device in real time, the load state of the load end is judged according to the output waveform information of the voltage output pin, when the voltage detection module transmits the detection result to the logic processing module, the logic processing module can directly complete the determination of the power output mode, and the electric signal corresponding to the power output mode is directly transmitted to the regulation and control mode selection pin according to the judgment result. Therefore, the whole process only needs to complete the signal conversion once, and the logic processing module included by the detection circuit can directly feed back the electric signal corresponding to the power output mode to the regulation and control mode selection pin, so that the power output mode can be switched in time according to the condition of the load, the response of the power conversion mode is relatively rapid, and further, on one hand, the occurrence of the condition that the electronic equipment is blacked or halted due to slow response in the power conversion process can be avoided, on the other hand, the energy consumption of the electronic equipment can be reduced, and the endurance time of the electronic equipment is increased.
Drawings
Fig. 1 is a schematic circuit diagram of a power control circuit according to an embodiment of the present invention;
FIG. 2 is a diagram of modulation waveforms in the pulse width output mode according to an embodiment of the present invention;
FIG. 3 is a diagram of a modulation waveform in a pulse frequency output mode according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a power conversion output according to an embodiment of the invention;
FIG. 5 is a schematic circuit diagram of a signal amplifier according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a voltage comparing device according to an embodiment of the invention.
Detailed Description
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, 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.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a power control circuit, where the power control circuit is connected to a load terminal (1), and the power control circuit includes a power conversion follower 2 and a detection circuit 3 connected to the power conversion follower 2, where the power conversion follower 2 includes a regulation mode selection pin and a voltage output pin, the regulation mode selection pin is used to convert a power output mode, the voltage output pin is used to output a voltage to the load terminal 1, an input end of a voltage detection module 31 is electrically connected to the voltage output pin, and the voltage detection module 31 is used to detect output waveform information of the voltage output pin; the output end of the voltage detection module 31 is electrically connected with the input end of the logic processing module 32, the output end of the logic processing module 32 is electrically connected with a regulation mode selection pin, and the logic processing module 32 is configured to determine a power output mode of the load end 1 and transmit an electrical signal corresponding to the power output mode to the regulation mode selection pin, where the power output mode includes a pulse frequency output mode and a pulse width output mode; the detection circuit 3 includes a voltage detection module 31 and a logic processing module 32.
The power control circuit provided by the embodiment of the invention is electrically connected with the load end 1 and is used for adjusting the power output mode of the load end 1 connected with the power control circuit. For example, when the load terminal 1 is in the heavy load state, the heavy load state is a state where the electronic device consumes more energy under the function, and the power processor controls the logic level to make the logic level be the high level, so that the power output mode is in the pulse width output mode as shown in fig. 2. As shown in fig. 2, ILOAD represents a load condition at the load end, T is a regulation period, T is a high level time, and during regulation, the regulation period T is not changed, and the regulation of the output signal is realized by adjusting the high level time T, that is, the modulation period is not changed, but the modulation width is changed, but at the same time, the output power at the load end is larger, and when the load end is in a light load state, the system still maintains the output mode, resulting in an endless loss of energy. When the load terminal 1 is in a light load state, the light load state is a state where the energy consumption of the electronic device is low under the function, and the power conversion output device 2 controls the logic level to make the logic level be a low level, so that the power output mode is in a pulse frequency output mode as shown in fig. 3. As shown in fig. 3, ILOAD represents the load condition of the load terminal, and the regulation and control system can continuously and flexibly adjust the regulation and control frequency to meet the load requirement according to the change of the load condition of the load terminal 1.
The power control circuit provided by the embodiment of the invention comprises a power conversion output device 2 and a detection circuit 3 connected with the power conversion output device 2. The structure of the power conversion output device 2 is shown in fig. 4, wherein the Mode is a regulation Mode selection pin for converting the power output Mode. For example, when the regulation mode selection pin receives a high level signal, the power output mode can be converted into a pulse width output mode; when the regulation mode selection pin receives a low level signal, the power output mode can be converted into a pulse frequency output mode. EN is an enable pin for controlling the activation of the power conversion output 2. GND1 is a common ground terminal for signal return of the power conversion output unit 2, thereby mitigating interference between signals. VoutIs a voltage output pin and is used for outputting voltage for the load end 1 after voltage stabilization.
Secondly, the detection circuit 3 may include a voltage detection module 31 and a logic processing module 32. The input end of the voltage detection module 31 is electrically connected to the voltage output pin, the voltage detection module 31 may monitor output waveform information of the voltage output pin of the power conversion output device 2 in real time, the output waveform information may include output ripples and upper and lower overshoots of the output voltage, and then the load state of the load terminal 1 is determined according to the output waveform information of the voltage output pin.
The logic processing module 32 comprises an input end and an output end, the input end of the logic processing module 32 is electrically connected with the output end of the voltage detection module 31, the output end of the logic processing module 32 is electrically connected with the regulation mode selection pin, the logic processing module 32 determines the power output mode according to the detection result of the voltage detection module 31, and transmits the electric signal corresponding to the power output mode to the regulation mode selection pin. It should be noted that the logic processing module 32 may be an integrated processing chip, and further, when the voltage detection module 31 transmits the detection result to the logic processing module 32, the logic processing module 32 may directly complete the determination of the power output mode, and directly transmit the electrical signal corresponding to the power output mode to the regulation mode selection pin according to the determination result. It should be further noted that, since the logic processing module 32 can directly complete the determination of the power output mode by the logic processing module 32, and directly transmit the electrical signal corresponding to the power output mode to the regulation mode selection pin according to the judgment result, when the load terminal 1 has a heavy load state and becomes a light load state, the power output mode can be directly converted from the pulse width output mode to the pulse frequency output mode, so that it can be avoided that the power output mode is the power output mode in the heavy load state when the load is in the light load state, thereby avoiding the energy from being consumed without any end, further playing a role in reducing the energy consumption and increasing the endurance time.
It can be seen from the foregoing embodiments that, in the embodiments of the present invention, the power control circuit includes a power conversion output device 2 and a detection circuit 3 connected to the power conversion output device 2, the power conversion output device 2 includes a regulation mode selection pin and a voltage output pin, the detection circuit 3 includes a voltage detection module 31 and a logic processing module 32, an input end of the voltage detection module 31 is electrically connected to the voltage output pin, an input end of the logic processing module 32 is electrically connected to an output end of the voltage detection module 31, and an output end of the logic processing module 32 is electrically connected to the regulation mode selection pin. In this way, the voltage detection module 31 may monitor the output waveform information of the voltage output pin of the power conversion output device 2 in real time, and further determine the load state of the load terminal 1 according to the output waveform information of the voltage output pin, when the voltage detection module 31 transmits the detection result to the logic processing module 32, the logic processing module 32 may directly complete the determination of the power output mode, and directly transmit the electrical signal corresponding to the power output mode to the regulation and control mode selection pin according to the determination result. Therefore, the whole process only needs to complete the signal conversion once, and the logic processing module 32 included by the detection circuit 3 can directly feed back the electric signal corresponding to the power output mode to the regulation and control mode selection pin, so that the power output mode can be switched in time according to the condition of the load, the response of the power conversion mode is relatively rapid, and further, on one hand, the occurrence of the condition that the electronic equipment is blackened or halted due to slow response in the power conversion process can be avoided, on the other hand, the energy consumption of the electronic equipment can be reduced, and the endurance time of the electronic equipment is prolonged.
Optionally, the detection circuit 3 further includes a dc blocking capacitor 311; the dc blocking capacitor 311 is electrically connected between the voltage output pin and the input terminal of the voltage detection module 31.
Specifically, as shown in fig. 1, the dc blocking capacitor 311 includes a first plate and a second plate, and an insulator is disposed between the first plate and the second plate, so that in an ac environment, the larger the power frequency is, the larger the angular frequency is, and the smaller the capacitive reactance is. Under the direct current environment, the power frequency is 0, omega approaches infinity, the capacitive reactance is infinite, and no direct current passes through. Therefore, an ac current can pass through the dc blocking capacitor 311, and a dc current cannot pass through the dc blocking capacitor 311. Since the blocking capacitor 311 is electrically connected between the voltage output pin and the input terminal of the voltage detection module 31, the blocking capacitor 311 blocks ac current, so that the current reaching the voltage detection module 31 is ac current, and the voltage corresponding to the ac current has more obvious output ripple and overshoot, thereby being more beneficial to the voltage detection module 31 to detect the output waveform information of the voltage output pin.
Optionally, the detection circuit 3 further includes a frequency-selective filter 312; the frequency-selective filter 312 is electrically connected between the dc blocking capacitor 311 and the input end of the voltage detection module 31, and the frequency-selective filter 312 is configured to filter interference noise output by the dc blocking capacitor 311.
Specifically, the frequency selective filter 312 may include a filter and a frequency selective circuit, and the filter is electrically connected to the frequency selective circuit. The filter may be one of low-pass filter, high-pass filter, band-stop filter, etc., the filter filters the signal with non-set frequency, and then the frequency-selecting circuit separates the signal with set frequency range from the signals with other frequencies, so as to filter the interference clutter output by the blocking capacitor 311, thereby making the subsequent detection of the voltage detection module 31 more accurate.
Optionally, the detection circuit 3 further includes a signal amplifier 313; the signal amplifier 313 comprises an input end and an output end, the input end of the signal amplifier 313 is electrically connected with the voltage output pin, the output end of the signal amplifier 313 is electrically connected with the input end of the voltage detection module 31, and the signal amplifier 313 is used for adjusting the amplification factor of the output voltage of the voltage output pin.
Specifically, the circuit of the signal amplifier 313 is as shown in fig. 5, wherein R1, R2 and R3 may be one of variable resistors, and the amplification factor of the signal amplifier 313 can be adjusted by controlling the change of the resistance values of R1, R2 and R3. The signal amplifier 313 includes an input terminal and an output terminal, the input terminal of the signal amplifier 313 is electrically connected to the voltage output pin, when the dc blocking capacitor 311 and the frequency selective filter 312 are connected to the detection circuit, the input terminal of the signal amplifier 313 is electrically connected to the output terminal of the frequency selective filter 312, and the output terminal of the signal amplifier 313 is electrically connected to the input terminal of the voltage detection module 31. Specifically, the input end of the signal amplifier 313 includes a non-inverting input end and an inverting input end, the non-inverting input end is an input end labeled with "+" in fig. 5, the inverting input end is an input end labeled with "+" in fig. 5, wherein the non-inverting input end is electrically connected to the voltage output pin, when the dc blocking capacitor 311 and the frequency selecting filter 312 are connected to the detection circuit, the non-inverting input end is electrically connected to the output end of the frequency selecting filter 312, and the inverting input end is grounded. If the voltage input by the non-inverting input terminal is higher than the voltage input by the inverting input terminal, the output terminal of the signal amplifier 313 outputs a voltage having the same property as the voltage of the positive power supply; on the other hand, if the voltage input from the inverting input terminal is higher than the voltage input from the non-inverting input terminal, the output terminal of the signal amplifier 313 outputs a voltage having the same property as the voltage of the negative power supply. Therefore, the voltage input by the non-inverting input terminal and the voltage input by the inverting input terminal are adjusted by changing the resistance values of the resistors R1, R2 and R3, and the amplification factor of the output voltage U1 of the voltage output pin is further adjusted, so that the output voltage U1 of the voltage output pin and the internal threshold voltage U3 of the voltage detection module can be in the same comparison stage during comparison.
Optionally, the signal amplifier 313 further includes a ground terminal, and the ground terminal is used for signal backflow.
Specifically, as shown in fig. 5, GND2 and GND3 represent two ground terminals of the signal amplifier 313, and the voltage signal of the power amplifier is returned through the two ground terminals, so as to reduce interference between the signals.
Optionally, the voltage detection module 31 includes a voltage comparison element 314; an input end of the voltage comparing element 314 is electrically connected with an output end of the amplifier, an output end of the voltage comparing element 314 is electrically connected with an input end of the logic processing module 32, and the voltage comparing element 314 is configured to determine an output voltage mode of the voltage output pin according to a comparison result between an output voltage of the amplifier and a threshold voltage;
wherein the output voltage mode includes a low level mode and a high level mode.
Specifically, as shown in fig. 6, the input terminals of the voltage comparison element 314 may include a first input terminal and a second input terminal, the first input terminal is an input terminal with a sign of "+" in fig. 6, the second input terminal is an input terminal with a sign of "+" in fig. 6, the first input terminal inputs the voltage information U2 amplified by the amplifier, the second input terminal inputs the threshold voltage U3, and the state of the load is determined by comparing the peak values of U2 and U3. The threshold voltage U3 is a critical value when the load terminal 1 is in a heavy load state or a light load state. For example, when U2 is greater than U3, the output voltage mode of the voltage output pin may be determined to be a high mode. When U2 is less than or equal to U3, the output voltage mode of the voltage output pin may be determined to be a high mode.
Optionally, the logic processing module 32 includes a logic count processor; in the case that the voltage comparison element 314 determines that the output voltage mode of the voltage output pin is a low level mode, the logic count processor sends a first electrical signal to the regulation mode selection pin, where the first electrical signal is an electrical signal for controlling the output power mode of the power conversion output 2 to be a pulse frequency output mode; in a case where the voltage comparing element 314 determines that the output voltage mode of the voltage output pin is a high level mode, the logic count processor is configured to send a second electrical signal to the regulation mode selection pin, where the second electrical signal is an electrical signal for controlling the output power mode of the power conversion output 2 to be a pulse width output mode.
It should be noted that when the logic count processor receives the output voltage mode of the voltage output pin determined by the voltage comparison element 314, different electrical signals may be sent to the regulation mode selection pin according to the output voltage mode. Specifically, when the voltage comparing element 314 determines that the output voltage mode of the voltage output pin is the low level mode, the logic count processor sends a first electrical signal to the regulation mode selection pin, where the first electrical signal is an electrical signal for controlling the output power mode of the power conversion output device 2 to be the pulse frequency output mode; in the case where the voltage comparing element 314 determines that the output voltage mode of the voltage output pin is the high level mode, the logic count processor sends a second electrical signal to the regulation mode selection pin, where the second electrical signal is an electrical signal for controlling the output power mode of the power conversion output 2 to be the pulse width output mode. The determination of the power output mode can be directly completed through the logic counting module, and the electric signal corresponding to the power output mode is directly transmitted to the regulation and control mode selection pin according to the judgment result, therefore, when the load end 1 is changed from a heavy load state to a light load state, the power output mode can be directly converted into the pulse frequency output mode, thus, the power output mode which is still the power output mode in the heavy load state can be avoided when the load is in the light load state, and further the energy is prevented from being consumed without end, so that the energy consumption is reduced, and the endurance time is prolonged.
Optionally, a timer is integrated in the logic count processor, and the timer is used for determining the mode of the output voltage of the voltage detection module 31 within a preset time.
It should be noted that, since the logic count processor can directly complete the determination of the power output mode, and directly transmit the electrical signal corresponding to the power output mode to the regulation mode selection pin according to the determination result, the electrical signal transmission action is easily performed as soon as the voltage signal changes, and erroneous determination is easily caused. Therefore, a timer is integrated in the logic count processor, so as to determine the output voltage mode of the voltage detection module 31 within a preset time, and when the voltage signal changes repeatedly within the preset time, the transmission of the electrical signal is completed, so as to ensure the accuracy of the judgment of the logic count processor.
Optionally, the power conversion output device 2 further includes an enable pin; the enable pin is electrically connected with the power conversion output device 2, and the enable pin is used for controlling the starting of the power conversion output device 2.
Specifically, as shown in fig. 4, EN is an enable pin, and the enable pin may be electrically connected to the voltage input pin V of the power conversion output device 2inIn this way, when the circuit fails, the operation of the circuit can be stopped through the enable pin, and the circuit is prevented from being damaged due to continuous failure.
It can be seen from the foregoing embodiments that, in the embodiments of the present invention, the power control circuit includes a power conversion output device 2 and a detection circuit 3 connected to the power conversion output device 2, the power conversion output device 2 includes a regulation mode selection pin and a voltage output pin, the detection circuit 3 includes a voltage detection module 31 and a logic processing module 32, an input end of the voltage detection module 31 is electrically connected to the voltage output pin, an input end of the logic processing module 32 is electrically connected to an output end of the voltage detection module 31, and an output end of the logic processing module 32 is electrically connected to the regulation mode selection pin. In this way, the voltage detection module 31 may monitor the output waveform information of the voltage output pin of the power conversion output device 2 in real time, and further determine the load state of the load terminal 1 according to the output waveform information of the voltage output pin, when the voltage detection module 31 transmits the detection result to the logic processing module 32, the logic processing module 32 may directly complete the determination of the power output mode, and directly transmit the electrical signal corresponding to the power output mode to the regulation and control mode selection pin according to the determination result. Therefore, the whole process only needs to complete the signal conversion once, and the logic processing module 32 included by the detection circuit 3 can directly feed back the electric signal corresponding to the power output mode to the regulation and control mode selection pin, so that the power output mode can be switched in time according to the condition of the load, the response of the power conversion mode is relatively rapid, the condition that the electronic equipment is blacked or halted due to slow response in the power conversion process can be avoided, the energy consumption of the electronic equipment can be reduced, and the endurance time of the electronic equipment is prolonged.
In addition, through the setting of the blocking capacitor 311, the frequency-selecting filter 312 and the signal amplifier 313, the voltage signal is less interfered in the whole detection process, and the detection accuracy is further increased. Secondly, the logic processing module 32 according to the embodiment of the present invention includes a logic count processor, and when the logic count processor receives the output voltage mode of the voltage output pin determined by the voltage comparing element 314, the logic count processor can send different electrical signals to the regulation mode selection pin according to the output voltage mode, and the whole process does not require external software to participate in processing, thereby avoiding the problem of regulation failure caused by software failure, and reducing the risk of regulation failure.
In addition, an embodiment of the present invention further provides an electronic device, where the electronic device includes the power control circuit described in any of the above embodiments.
It should be noted that the electronic device may be: a cell phone, a tablet, an e-book reader, an MP3 player, an MP4 player, a laptop portable computer, a car computer, a desktop computer, a set-top box, a smart television, or a wearable device.
It should be further noted that, because the electronic device includes the power control circuit, when the electronic device adjusts the power output mode of the load terminal 1, the switching of the modes can be rapidly completed through the power output mode, so as to avoid the situation that the electronic device is turned off or halted due to slow response, and on the other hand, avoid the problem that the electronic device cannot be switched in time when the load is switched from the light load state to the heavy load state, thereby reducing the energy consumption of the electronic device and increasing the endurance time of the electronic device.
It should be added that all the embodiments in this specification are described in a progressive manner, each embodiment focuses on the differences from the other embodiments, and the same and similar parts among the embodiments may be referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be 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 terminal 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 terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.
The technical solutions provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained in this document by applying specific examples, and the descriptions of the above examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A power control circuit electrically connected to a load terminal (1), characterized in that the power control circuit comprises a power conversion follower (2) and a detection circuit (3) connected to the power conversion follower (2), wherein,
the power conversion output device (2) comprises a regulation mode selection pin and a voltage output pin, wherein the regulation mode selection pin is used for converting the power output mode, and the voltage output pin is used for outputting voltage for the load end (1);
the detection circuit (3) comprises a voltage detection module (31) and a logic processing module (32), wherein the input end of the voltage detection module (31) is electrically connected with the voltage output pin, and the voltage detection module (31) is used for detecting the output waveform information of the voltage output pin;
the output end of the voltage detection module (31) is electrically connected with the input end of the logic processing module (32), the output end of the logic processing module (32) is electrically connected with the regulation and control mode selection pin, and the logic processing module (32) is used for determining the power output mode of the load end (1) and transmitting an electric signal corresponding to the power output mode to the regulation and control mode selection pin, wherein the power output mode comprises a pulse frequency output mode and a pulse width output mode.
2. The power control circuit according to claim 1, wherein the detection circuit (3) further comprises a dc blocking capacitance (311);
the blocking capacitor (311) is electrically connected between the voltage output pin and the input end of the voltage detection module (31).
3. The power control circuit of claim 2, wherein the detection circuit (3) further comprises a frequency selective filter (312);
the frequency-selective filter (312) is electrically connected between the blocking capacitor (311) and the input end of the voltage detection module (31), and the frequency-selective filter (312) is used for filtering interference noise output by the blocking capacitor (311).
4. The power control circuit according to claim 1, wherein the detection circuit (3) further comprises a signal amplifier (313); the signal amplifier (313) comprises an input end and an output end, the input end of the signal amplifier (313) is electrically connected with the voltage output pin, the output end of the signal amplifier (313) is electrically connected with the input end of the voltage detection module (31), and the signal amplifier (313) is used for adjusting the amplification factor of the output voltage of the voltage output pin.
5. The power control circuit of claim 1, wherein the signal amplifier (313) further comprises a ground terminal, the ground terminal being configured for signal return.
6. The power control circuit of claim 4, wherein the voltage detection module (31) comprises a voltage comparison element (314);
an input end of the voltage comparison element (314) is electrically connected with an output end of the amplifier, an output end of the voltage comparison element (314) is electrically connected with an input end of the logic processing module (32), and the voltage comparison element (314) is used for determining an output voltage mode of the voltage output pin according to a comparison result of the output voltage of the amplifier and a threshold voltage;
wherein the output voltage mode includes a low level mode and a high level mode.
7. The power control circuit of claim 6, wherein the logical processing module (32) comprises a logical count processor;
under the condition that the voltage comparison element (314) determines that the output voltage mode of the voltage output pin is a low level mode, the logic counting processor is used for sending a first electric signal to the regulation mode selection pin, wherein the first electric signal is an electric signal for controlling the output power mode of the power conversion output device (2) to be a pulse frequency output mode;
and under the condition that the voltage comparison element (314) determines that the output voltage mode of the voltage output pin is a high level mode, the logic counting processor is used for sending a second electric signal to the regulation mode selection pin, wherein the second electric signal is an electric signal for controlling the output power mode of the power conversion output device (2) to be a pulse width output mode.
8. The power control circuit according to claim 7, wherein a timer is integrated in the logic count processor, and the timer is used for determining the mode of the output voltage of the voltage detection module (31) within a preset time.
9. The power control circuit according to claim 1, wherein the power conversion output (2) further comprises an enable pin;
the enable pin is electrically connected with the power conversion output device (2), and the enable pin is used for controlling the starting of the power conversion output device (2).
10. An electronic device, characterized in that the electronic device comprises a power control circuit according to any of claims 1-9.
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| CN202010075812.8A CN111193383A (en) | 2020-01-22 | 2020-01-22 | Power control circuit and electronic device |
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Application publication date: 20200522 |