CN111682761A - Power supply control circuit and method and wearable electronic equipment - Google Patents
Power supply control circuit and method and wearable electronic equipment Download PDFInfo
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- CN111682761A CN111682761A CN202010440059.8A CN202010440059A CN111682761A CN 111682761 A CN111682761 A CN 111682761A CN 202010440059 A CN202010440059 A CN 202010440059A CN 111682761 A CN111682761 A CN 111682761A
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- 238000005070 sampling Methods 0.000 claims abstract description 66
- 239000003990 capacitor Substances 0.000 claims description 47
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- 230000002596 correlated effect Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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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
- H02M1/14—Arrangements for reducing ripples from dc input or output
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Abstract
A power supply control circuit, a method and a wearable electronic device sample the current working voltage of an electric component through a sampling circuit, the control circuit compares a preset voltage with the sampling voltage, and the preset voltage is positively correlated with the minimum stable working voltage of the electric component; when the sampling voltage is less than the preset voltage, the first output circuit is controlled to boost the power signal to the boosted signal and supply the boosted signal to the electric component, and when the sampling voltage is greater than or equal to the preset voltage, the second output circuit is controlled to directly supply the power signal to the electric component. Therefore, by monitoring the working voltage of the electric component, when the sampling voltage is lower than the preset voltage, boosting is carried out, otherwise, a power supply signal is directly output, boosting processing is reasonably carried out, the stability of the system is maintained, and power supply ripples are reduced; and when the sampling voltage is greater than or equal to the preset voltage, the voltage is not boosted, the energy of the battery is saved, and the cruising ability of the battery is improved.
Description
Technical Field
The application belongs to the technical field of power control, and particularly relates to a power control circuit, a power control method and wearable electronic equipment.
Background
With the development of the intellectualization of electronic equipment, more and more electronic equipment has diversified functions, such as voice interaction, data transmission, augmented reality and the like; the problem of insufficient cruising ability and reduced system stability is generated while the functions are diversified. In addition, in order to improve user experience, the electronic equipment has complex appearance and various structures, which often causes the increase of the internal power routing distance, easily generates ripples, further weakens cruising ability and reduces system stability; for example, in a neck-wearing electronic device, a battery and a circuit board are usually packaged at two ends of a neck strap respectively to maximize battery capacity and optimize product structure weight, so that the battery and the circuit board need to be connected by a long-distance wire, which causes a large increase in dc impedance of a main circuit of the battery, and this dc impedance directly affects stability and audio and radio frequency performance indexes of an electronic system at the circuit board end.
Therefore, the conventional power control technology adopted by the electronic equipment has the problems of insufficient cruising ability and reduced system stability caused by diversified functions and diversified appearance structures of the electronic equipment.
Disclosure of Invention
An object of the application is to provide a power control circuit, a method and a wearable electronic device, and aims to solve the problems of insufficient cruising ability and reduced system stability caused by diversified functions and diversified appearance structures of the electronic device in the conventional power control technology adopted by the electronic device.
A first aspect of an embodiment of the present application provides a power control circuit, configured to access a power signal output by a battery and be connected to an electrical component, where the power control circuit includes:
the sampling circuit is configured to sample the current working voltage of the electric component and output a sampling voltage;
the control circuit is connected with the sampling circuit and is configured to compare the sampling voltage with a preset voltage and output a first enabling signal when the sampling voltage is smaller than the preset voltage and output a second enabling signal when the sampling voltage is larger than or equal to the preset voltage;
the first output circuit is connected with the battery and the control circuit, is configured to be conducted and operated when receiving the first enabling signal, and outputs a boosted signal generated after boosting the power supply signal to the electricity utilization assembly as a working voltage; and
and the second output circuit is connected with the battery and the control circuit, is configured to be conducted to work when receiving the second enabling signal, and outputs the power supply signal to the electric component as a working voltage.
A second aspect of the embodiments of the present application provides a power supply control method based on the above power supply control circuit, including:
sampling the current working voltage of the power utilization assembly by using a sampling circuit, and outputting the sampling voltage;
receiving the sampling voltage by using a control circuit, comparing the sampling voltage with a preset voltage, outputting a first enabling signal when the sampling voltage is smaller than the preset voltage, and outputting a second enabling signal when the sampling voltage is larger than or equal to the preset voltage;
a first output circuit is adopted to conduct and work when receiving the first enabling signal, and a boosted signal generated after the power supply signal is boosted serves as a working voltage to be output to the electricity utilization assembly;
and when the second output circuit is adopted to receive the second enabling signal, the second output circuit is conducted to work, and the power supply signal is output to the electricity utilization assembly as working voltage.
A third aspect of an embodiment of the present application provides a wearable electronic device, including:
a battery configured to output a power supply signal;
the power utilization assembly is configured to receive the working voltage and work according to a control instruction input by a user;
the power supply control circuit is connected with the battery and the electric component; and
a housing configured to enclose the battery, the powered component, and the power control circuit.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: by monitoring the working voltage of the power utilization assembly, when the sampling voltage is lower than the preset voltage, boosting is carried out, otherwise, a power supply signal is directly output, boosting processing is reasonably carried out, the stability of the system is maintained, and power supply ripples are reduced; when the sampling voltage is greater than or equal to the preset voltage, the voltage is not boosted, so that the energy of the battery is saved, the cruising ability of the battery is improved, and the service life of the battery is prolonged; the problems of insufficient cruising ability and reduced system stability caused by diversified functions and diversified appearance structures of the electronic equipment are fully solved.
Drawings
Fig. 1 is a schematic structural diagram of a power control circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a power control circuit according to another embodiment of the present disclosure;
FIG. 3 is an exemplary circuit schematic of the power control circuit shown in FIG. 1;
FIG. 4 is an exemplary circuit schematic of the power control circuit shown in FIG. 2;
fig. 5 is a detailed flowchart of a power control method according to another embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic wearable device according to yet another embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1, a schematic diagram of a power control circuit 20 according to an embodiment of the present disclosure shows only parts related to the embodiment for convenience of description, and the following details are described:
a power control circuit 20 is connected to a battery and an electric component, and receives a power signal VBAT output from the battery. The power control circuit 20 includes a sampling circuit 10, a control circuit 20, a first output circuit 30, and a second output circuit 40.
The sampling circuit 10 is connected to the control circuit 20, the control circuit 20 is connected to the first output circuit 30 and the second output circuit 40, and the first output circuit 30 and the second output circuit 40 are both connected to the electric component and the battery.
The sampling circuit 10 is configured to sample a current operating voltage of the powered component and output a sampled voltage SAM.
In particular, the size of the sampling voltage SAM depends on the current operating voltage of the powered component and the internal structure of the sampling circuit 10.
The control circuit 20 is configured to receive the sampled voltage SAM and compare the sampled voltage SAM with a preset voltage REF, the sampled voltage SAM outputting a first enable signal when less than the preset voltage REF, the sampled voltage SAM outputting a second enable signal when greater than or equal to the preset voltage REF.
Specifically, the preset voltage REF is positively correlated with the minimum stable operating voltage of the electrical component. The minimum stable operating voltage is the minimum voltage at which the power consumption component can stably operate, and when the operating voltage lower than the minimum stable operating voltage of the power consumption component is lower than the minimum stable operating voltage, the power consumption component cannot stably operate.
Specifically, the value of the preset voltage REF is also related to the internal structure of the sampling circuit 10. For example, assuming that the current operating voltage of the electric component is Vt, the internal structure of the sampling circuit 10 determines that the sampling voltage SAM is n times (0 < n < 1) the current operating voltage, and the sampling voltage SAM becomes n × Vt. Assuming that the minimum stable operating voltage of the power consumption component is Vmin, the value of the preset voltage REF is related to the internal structure of the sampling circuit 10 and the minimum stable operating voltage of the power consumption component, and is represented by a calculation formula: the preset voltage REF is n Vmin.
Therefore, when the sampling voltage SAM is greater than or equal to the preset voltage REF, it indicates that the current operating voltage of the electrical component is greater than or equal to the minimum stable operating voltage, and the electrical component can perform stable operation; when the sampling voltage SAM is smaller than the preset voltage REF, the current working voltage of the electric component is smaller than the minimum stable working voltage, and at the moment, if the voltage is not boosted, the system cannot work stably.
The minimum stable operating voltage is calculated from the impedance of the power supply loop of the electronic device.
The first enabling signal and the second enabling signal are both level signals, wherein the first enabling signal is a low level signal, and the second enabling signal is a high level signal; the first enable signal may enable the first output circuit 30 and the second enable signal may enable the second output circuit 40.
The first output circuit 30 is configured to operate upon receiving the first enable signal, boost the power supply signal VBAT, generate a boosted voltage signal, and output the boosted voltage signal as an operating voltage to the electric component.
The second output circuit 40 is configured to operate upon receiving the second enable signal, and output the power signal VBAT as an operating voltage to the power consuming component.
Specifically, at any time, the first output circuit 30 and the second output circuit 40 are both on and off. When the current working voltage of the power consumption component is greater than or equal to the minimum stable working voltage, the second output circuit 40 works to directly output the power signal VBAT to the power consumption component; when the current working voltage of the power consumption system is less than the minimum stable working voltage, the first output circuit 30 works to boost the power signal VBAT to obtain a boosted signal, and then outputs the boosted signal to the power consumption assembly to reduce ripples and maintain the stability of the system.
The power control circuit 20 provided in this embodiment boosts the working voltage of the power-consuming component when the working voltage is lower than the minimum stable working voltage, otherwise, directly outputs the power signal VBAT, reasonably boosts the voltage, maintains the system stability, and reduces power supply ripples; and when the working voltage of the power utilization assembly is greater than or equal to the minimum stable working voltage, the voltage is not boosted, the energy of the battery is saved, and the cruising ability of the battery is improved.
Referring to fig. 2, a schematic structural diagram of a power control circuit 20 according to another embodiment of the present application is shown, for convenience of description, only the parts related to the embodiment are shown, and the following details are described:
in an alternative embodiment, the power control circuit 20 further includes a reference circuit 50. In other alternative embodiments, a filter circuit 60 is also included.
The reference circuit 50 is connected to the control circuit 20, and the filter circuit 60 is connected to the first output circuit 30 and the second output circuit 40.
The reference circuit 50 is configured to output a preset voltage REF. Specifically, the value of the preset voltage REF is positively correlated with the minimum stable operating voltage of the electric component, and also with the internal structure of the sampling circuit 10.
The filter circuit 60 is configured to filter and output the boost signal or the power supply signal VBAT. By adding the filter circuit 60, high-frequency interference signals in the boost signal or the power signal VBAT are filtered, the stability of the power utilization assembly is further improved, and clutter interference is avoided.
Referring to fig. 3, a schematic diagram of an exemplary circuit of the power control circuit 20 shown in fig. 1 is shown, for convenience of description, only the parts related to the present embodiment are shown, and the details are as follows:
in an alternative embodiment, the first output circuit 30 includes a first capacitor C8 and a boost converter U1.
The first end of the first capacitor C8 and the input end VIN of the boost converter U1 are both connected to the battery, the second end of the first capacitor C8 is grounded, the enable end EN _ L of the boost converter U1 is connected to the control circuit 20, and the output end VOUT of the boost converter U1 is connected to the power consumption component.
Specifically, the first capacitor C8 is a filter capacitor, and is configured to filter a power signal VBAT output by the battery and output the filtered power signal to the input terminal VIN of the boost converter U1. The boost converter U1 is used to convert the power signal VBAT into a boost signal, and then output the boost signal to the power consuming component via the output terminal. The boost converter U1 is controlled by the control circuit 20 to operate only when a low level signal is received.
In an alternative embodiment, the second output circuit 40 includes a first resistor R2, a first resistor R1, a second capacitor C5, a diode D1, a first switch Q3, and a second switch Q2.
The first end of the first resistor R2 is connected to the control circuit 20, the second end of the first resistor R2 is connected to the controlled end of the first switch tube Q3, the input end of the first switch tube Q3, the first end of the first resistor R1 and the controlled end of the second switch tube Q2 are connected in common, and the second end of the first resistor R1 is connected to the battery. The second end of the second capacitor C5 and the output end of the first switch tube Q3 are grounded.
The battery is connected to a node where the first end of the second capacitor C5, the anode of the diode D1 and the input end of the second switching tube Q2 are connected together, and the electric component is connected to a node where the cathode of the diode D1 and the output end of the second switching tube Q2 are connected together.
Specifically, when the control circuit 20 outputs the second enable signal, the first switch tube Q3 is turned on, so that the controlled terminal of the second switch tube Q2 is pulled low, the second switch tube Q2 is turned on to operate, and the power signal VBAT output by the battery is output to the power consuming component through the diode D1 and the second switch tube Q2.
The second capacitor C5 is a filter capacitor, and filters the power signal VBAT output by the battery and then outputs the filtered power signal VBAT to the diode D1 and the second switch tube Q2, so that clutter interference is avoided.
Optionally, the first switch tube Q3 is implemented by an NPN triode, and the controlled end, the input end, and the output end of the first switch tube Q3 correspond to the base, the collector, and the emitter of the NPN triode, respectively; the first resistor R2 is a base current limiting resistor of the NPN transistor. The first resistor R1 is a current limiting resistor. Optionally, the second switch tube Q2 is implemented by a PMOS tube, and the controlled end, the input end, and the output end of the second switch tube Q2 correspond to the gate, the source, and the drain of the PMOS tube, respectively. Through setting up first output circuit 30 and stepping up with the unable stable during operation of electric component, the output signal that steps up, second output circuit 40 can guarantee at power signal VBAT that the electric component works when stable to realize the power efficiency maximize, rationally carry out the power configuration, when improving duration, guarantee that electronic equipment can the stable operation.
In an alternative embodiment, the sampling circuit 10 includes a third resistor R3 and a fourth resistor R4.
The first end of the third resistor R3 is connected to the electric component, the node at which the second end of the third resistor R3 and the first end of the fourth resistor R4 are connected to each other is connected to the control circuit 20, and the second end of the fourth resistor R4 is connected to ground.
In an alternative embodiment, the control circuit 20 includes a comparator U3 and a third capacitor C2.
A first end of the third capacitor C2 is connected to an inverting input end of the comparator U3, and an inverting input end of the comparator U3 is connected to a preset voltage REF; the non-inverting input end of the comparator U3 is connected with the sampling circuit 10; the output terminal of the comparator U3 is connected to the first output circuit 30 and the second output circuit 40.
Specifically, the third capacitor C2 is a filter capacitor for filtering out a high-frequency interference signal in the preset voltage REF. The comparator U3 is used to compare the magnitudes of the preset voltage REF and the sampled voltage SAM. The preset voltage REF is in positive correlation with the minimum stable operating voltage of the power consumption component, that is, the larger the minimum stable operating voltage of the power consumption component is, the larger the preset voltage REF is. In addition, the preset voltage REF is also related to the internal structure of the sampling circuit 10.
For example, according to the internal structure of the sampling circuit 10 provided in this embodiment, the calculation formula of the sampling voltage SAM is known as follows: SAM ═ R4/(R3+ R4) ] × Vt, Vt is the current operating voltage of the consumer; let R4/(R3+ R4) be n, 0 < n < 1; then SAM n Vt. The internal structure of the sampling circuit 10 and the current operating voltage thus together determine the size of the sampled voltage SAM.
In this case, the preset voltage REF is calculated as REF n Vmin, R4/(R3+ R4) n, 0 < n < 1, and Vmin is the minimum stable operating voltage of the electric component.
By comparing the preset voltage REF with the sampling voltage SAM, it can be known that the comparison between the preset voltage REF and the sampling voltage SAM is actually a comparison between the minimum stable operating voltage of the power consuming component and the current operating voltage of the power consuming component.
When the comparator U3 compares the sampling voltage SAM to be less than the preset voltage REF, which indicates that the current operating voltage of the power-consuming component is less than the minimum stable operating voltage, at this time, the comparator U3 outputs a first enable signal, i.e., a low-level signal, so as to enable the boost converter U1 in the first output circuit 30, so that the boost converter U1 boosts the power signal VBAT and outputs the boosted power signal VBAT to the power-consuming component, thereby maintaining the stability of the power-consuming component.
When the comparator U3 compares the sampling voltage SAM to be greater than or equal to the preset voltage REF, it indicates that the current operating voltage of the electrical component is greater than or equal to the minimum stable operating voltage, and the electrical component can stably operate. At this time, the comparator U3 outputs a second enable signal, i.e. a high level signal, so as to enable the boost converter U1 in the first output circuit 30 to be inoperative, and the first switch Q3 in the second output circuit 40 to be electrically conducted, so as to further enable the second switch Q2 to be electrically conducted, and the power signal VBAT is output to the power consuming component through the diode D1 and the second switch Q2. Therefore, the efficiency of the power supply is maximized, the power supply is reasonably configured and adjusted, the cruising ability of the battery is improved, and the stability of the system is effectively enhanced.
Referring to fig. 4, a schematic diagram of an exemplary circuit of the power control circuit 20 shown in fig. 2 is shown, for convenience of description, only the parts related to the present embodiment are shown, and the details are as follows:
in an alternative embodiment, the reference circuit 50 includes a fourth capacitor C1, a fifth capacitor C7, and a voltage converter U2.
A node at which the first terminal of the fourth capacitor C1 is commonly connected to the input terminal VI of the voltage converter U2 is connected to the initial signal VCC _ BAR, and a node at which the output terminal VO of the voltage converter U2 is commonly connected to the first terminal of the fifth capacitor C7 is connected to the control circuit 20; the second end of the fourth capacitor C1 and the second end of the fifth capacitor C7 are grounded; the voltage converter U2 is configured to convert the initial signal VCC _ BAR to a preset voltage REF.
Specifically, the fourth capacitor C1 and the fifth capacitor C7 are both filter capacitors, wherein the fourth capacitor C1 filters the initial signal VCC _ BAR and outputs the filtered initial signal VCC _ BAR to the input terminal VI of the voltage converter U2; the fifth capacitor C7 filters the preset voltage REF and outputs the filtered preset voltage REF to the non-inverting input terminal of the comparator U3. In this embodiment, the voltage converter U2 may be configured to stably output the preset voltage REF through hardware or software.
In an alternative embodiment, the filter circuit 60 includes a sixth capacitor C3 and a seventh capacitor C4.
The first end of the sixth capacitor C3 and the first end of the seventh capacitor C4 are both connected to the first output circuit 30 and the second output circuit 40, and the second end of the sixth capacitor C3 and the second end of the seventh capacitor C4 are both grounded. The sixth capacitor C3 and the seventh capacitor C4 are used for filtering, and output the power supply signal VBAT or the boost signal to the power consumption component after filtering, so that stability is further improved.
Referring to fig. 5, a specific flowchart of a power control method according to another embodiment of the present application is shown, for convenience of description, only the relevant portions of the embodiment are shown, and the following details are described:
a power supply control method comprising the steps of:
s01: sampling the current working voltage of the power utilization assembly by using a sampling circuit 10, and outputting a sampling voltage SAM;
s02: the control circuit 20 is used for receiving the sampling voltage SAM and comparing the sampling voltage SAM with a preset voltage REF, when the sampling voltage SAM is smaller than the preset voltage REF, a first enabling signal is output, and when the sampling voltage SAM is larger than or equal to the preset voltage REF, a second enabling signal is output;
s03: the first output circuit 30 is adopted to conduct and work when receiving the first enabling signal, and a boosting signal generated after boosting the power supply signal VBAT is output to the electricity utilization component as a working voltage;
s04: when the second output circuit 40 receives the second enable signal, it is turned on to operate, and outputs the power signal VBAT to the power consuming component as a working voltage.
Specifically, before step S02, the method further includes step S05: a reference circuit 50 is used to output a preset voltage REF.
After step S03 or step S04, step S06 is further included: the boost signal or the power supply signal VBAT is filtered and output by the filter circuit 60.
Please refer to fig. 6, which is a schematic structural diagram of an electronic wearable device according to still another embodiment of the present application, and for convenience of description, only the relevant portions of the electronic wearable device are shown, and the detailed description is as follows:
a wearable electronic device comprises a battery, an electricity utilization component, the power control circuit 20 and a shell.
The battery is connected to the power control circuit 20, and the power control circuit 20 is connected to the power consuming components.
The battery is configured to output a power supply signal VBAT. The electricity utilization component is configured to receive the working voltage and work according to a control instruction input by a user.
The power control circuit 20 is configured to receive the power signal VBAT, monitor a current operating voltage of the power-consuming component, control the power signal VBAT to boost when the current operating voltage is lower than a minimum stable operating voltage of the power-consuming component, output the boosted signal as the operating voltage, and directly output the power signal VBAT when the current operating voltage is greater than or equal to the minimum stable operating voltage. The operation principle and the internal structure of the power control circuit 20 are detailed above and will not be described in detail here.
The housing is configured to enclose the battery, the powered components, and the power control circuit 20.
In summary, the present application provides a power control circuit, a method and a wearable electronic device, which boost voltage when the working voltage of an electrical component is lower than the minimum stable working voltage by monitoring the working voltage of the electrical component, or output power signals directly, reasonably boost voltage, maintain system stability and reduce power ripple; and when the working voltage of the power utilization assembly is greater than or equal to the minimum stable working voltage, the voltage is not boosted, the energy of the battery is saved, and the cruising ability of the battery is improved.
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.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting 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 (10)
1. A power control circuit for receiving a power signal from a battery and connecting the power signal to a power consuming component, the power control circuit comprising:
the sampling circuit is configured to sample the current working voltage of the electric component and output a sampling voltage;
the control circuit is connected with the sampling circuit and is configured to compare the sampling voltage with a preset voltage and output a first enabling signal when the sampling voltage is smaller than the preset voltage and output a second enabling signal when the sampling voltage is larger than or equal to the preset voltage;
the first output circuit is connected with the battery and the control circuit, is configured to be conducted and operated when receiving the first enabling signal, and outputs a boosted signal generated after boosting the power supply signal to the electricity utilization assembly as a working voltage; and
and the second output circuit is connected with the battery and the control circuit, is configured to be conducted to work when receiving the second enabling signal, and outputs the power supply signal to the electric component as a working voltage.
2. The power control circuit of claim 1, further comprising:
a reference circuit connected with the control circuit and configured to output the preset voltage to the control circuit.
3. The power control circuit of claim 1, further comprising:
and a filter circuit connected to the first output circuit and the second output circuit, and configured to filter and output the boost signal or the power supply signal.
4. The power control circuit of claim 1, wherein the first output circuit comprises:
a first capacitor and a boost converter;
the first end of the first capacitor and the input end of the boost converter are connected with the battery, the second end of the first capacitor is grounded, the enabling end of the boost converter is connected with the control circuit, and the output end of the boost converter is connected with the power utilization assembly.
5. The power control circuit of claim 1, wherein the second output circuit comprises:
the circuit comprises a first resistor, a second capacitor, a diode, a first switch tube and a second switch tube;
the first end of the first resistor is connected with the control circuit, the second end of the first resistor is connected with the controlled end of the first switching tube, the input end of the first switching tube, the first end of the second resistor and the controlled end of the second switching tube are connected in common, and the second end of the second resistor is connected with the battery;
the second end of the second capacitor and the output end of the first switch tube are grounded;
the first end of the second capacitor, the anode of the diode and the input end of the second switch tube are connected with the battery, and the cathode of the diode and the output end of the second switch tube are connected with the power utilization assembly.
6. The power control circuit of claim 1, wherein the control circuit comprises:
a comparator and a third capacitor;
the first end of the third capacitor is connected with the inverting input end of the comparator, and the inverting input end of the comparator is connected with the preset voltage; the non-inverting input end of the comparator is connected with the sampling circuit; the output end of the comparator is connected with the first output circuit and the second output circuit.
7. The power control circuit of claim 1, wherein the sampling circuit comprises:
a third resistor and a fourth resistor;
the first end of the third resistor is connected with the power utilization assembly, a node where the second end of the third resistor and the first end of the fourth resistor are connected in common is connected with the control circuit, and the second end of the fourth resistor is grounded.
8. The power control circuit of claim 2, wherein the reference circuit comprises:
a fourth capacitor, a fifth capacitor and a voltage converter;
a node of the first end of the fourth capacitor, which is connected with the input end of the voltage converter in common, is connected with an initial signal, and a node of the output end of the voltage converter, which is connected with the first end of the fifth capacitor in common, is connected with the control circuit; a second end of the fourth capacitor is grounded with a second end of the fifth capacitor; the voltage converter is configured to convert the initial signal into the preset voltage.
9. A power supply control method based on the power supply control circuit according to any one of claims 1 to 8, characterized by comprising:
sampling the current working voltage of the power utilization assembly by using a sampling circuit, and outputting the sampling voltage;
receiving the sampling voltage by using a control circuit, comparing the sampling voltage with a preset voltage, outputting a first enabling signal when the sampling voltage is smaller than the preset voltage, and outputting a second enabling signal when the sampling voltage is larger than or equal to the preset voltage;
a first output circuit is adopted to conduct and work when receiving the first enabling signal, and a boosted signal generated after the power supply signal is boosted serves as a working voltage to be output to the electricity utilization assembly;
and when the second output circuit is adopted to receive the second enabling signal, the second output circuit is conducted to work, and the power supply signal is output to the electricity utilization assembly as working voltage.
10. A wearable electronic device, comprising:
a battery configured to output a power supply signal;
the power utilization assembly is configured to receive the working voltage and work according to a control instruction input by a user;
the power control circuit according to any one of claims 1 to 8, connected to the battery and the power consuming component; and
a housing configured to enclose the battery, the powered component, and the power control circuit.
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| CN202010440059.8A CN111682761A (en) | 2020-05-22 | 2020-05-22 | Power supply control circuit and method and wearable electronic equipment |
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| CN202010440059.8A CN111682761A (en) | 2020-05-22 | 2020-05-22 | Power supply control circuit and method and wearable electronic equipment |
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Application publication date: 20200918 |