CN115395762A - Single-inductor voltage transformation multi-voltage independent output circuit and related product - Google Patents
Single-inductor voltage transformation multi-voltage independent output circuit and related product Download PDFInfo
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- CN115395762A CN115395762A CN202211333087.5A CN202211333087A CN115395762A CN 115395762 A CN115395762 A CN 115395762A CN 202211333087 A CN202211333087 A CN 202211333087A CN 115395762 A CN115395762 A CN 115395762A
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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
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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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
- H02M1/36—Means for starting or stopping converters
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
The application provides a single-inductance voltage transformation multi-voltage independent output circuit and a related product, which are provided with an input interface and a plurality of output interfaces; the output circuit outputs an access signal when detecting that any output interface is accessed to the electric equipment through the automatic starting detection circuit; the current threshold detection circuit detects the current value of each output interface; the main control circuit outputs a corresponding enable control signal when receiving the access signal and outputs the corresponding enable control signal according to the current value; the switch mode control circuit outputs a first enable signal when receiving an enable control signal; the LDO mode control circuit outputs a second enable signal when receiving the enable control signal; each of the plurality of switch units is controlled by the first enable signal or the second enable signal to be conducted so as to output a second power supply voltage to the corresponding electric equipment through the connected output interface. Therefore, the switch units connected with the corresponding output interfaces can output different voltages.
Description
Technical Field
The application belongs to the technical field of communication, and particularly relates to a multi-voltage independent output circuit with single inductance transformation and a related product.
Background
At present, in the existing power output scheme of single-inductor voltage transformation, when a plurality of ports output, output ports cannot support different voltage outputs, only one voltage output can be shared, the output voltage of each interface cannot be flexibly adjusted, so that quick charging and slow charging cannot be simultaneously carried out, and the compatibility is poor.
Disclosure of Invention
The embodiment of the application provides a multi-voltage independent output circuit with a single inductor and a single transformer and a related product, so that the occurrence probability or symptom degree of motion sickness can be reduced.
In a first aspect, an embodiment of the present application provides a multi-voltage independent output circuit with a single inductor voltage transformation, which is configured with an input interface and multiple output interfaces, where the input interface is connected to the single inductor voltage transformation circuit to access a first power supply voltage, and the multiple output interfaces are used to access an electric device and supply power to the electric device; the multi-voltage independent output circuit comprises an automatic starting detection circuit, a current threshold detection circuit, a main control circuit, a switch mode control circuit, an LDO mode control circuit and a plurality of switch units;
the automatic power-on detection circuit is used for detecting whether each output interface of the plurality of output interfaces is connected to the electric equipment or not and outputting an access signal when the electric equipment is detected;
the main control circuit is connected with the automatic starting detection circuit and used for outputting a corresponding enabling control signal to the switch mode control circuit when receiving the access signal;
the switch mode control circuit is connected with the main control circuit and used for outputting a first enabling signal when receiving the enabling control signal;
the LDO mode control circuit is connected with the main control circuit and is used for outputting a second enabling signal when receiving the enabling control signal;
the plurality of switch units are connected with the input interface, the switch mode control circuit and the LDO mode control circuit, and are connected with the plurality of output interfaces in a one-to-one correspondence manner, each switch unit is used for being conducted under the control of the first enable signal or the second enable signal so as to output a first power supply voltage or a second power supply voltage to corresponding electric equipment through the connected output interface, and the second power supply voltage is the power supply voltage obtained after the first power supply voltage passes through the corresponding switch unit;
the current threshold detection circuit is connected with the input interface and the plurality of switch units and is used for detecting the current value of the output interface corresponding to the switched-on switch unit in the plurality of switch units;
and the main control circuit is also used for outputting the corresponding enabling control signal to the switch mode control circuit or the LDO mode control circuit according to the magnitude of the current value when receiving the current value.
In a second aspect, the present application provides a power adapter, which includes the single-inductor-transformer multi-voltage independent output circuit of the first aspect.
In a third aspect, an embodiment of the present application provides an electronic device, which includes the single-inductor-transformer multi-voltage independent output circuit described in the first aspect, or the power adapter described in the second aspect.
It can be seen that, in the embodiment of the present application, the single-inductor voltage transformation multi-voltage independent output circuit is configured with an input interface and a plurality of output interfaces; the multi-voltage independent output circuit outputs an access signal when detecting that any output interface is accessed to the electric equipment through the automatic startup detection circuit; the current threshold detection circuit detects the current value of each output interface; the main control circuit outputs a corresponding enabling control signal when receiving the access signal, and is used for outputting the corresponding enabling control signal according to the current value; the switch mode control circuit outputs a first enabling signal when receiving the enabling control signal; the LDO mode control circuit outputs a second enable signal when receiving the enable control signal; and each switch unit is used for conducting according to the control of the first enabling signal or the second enabling signal so as to output a second power supply voltage to the corresponding electric equipment through the connected output interface. Therefore, each switch unit is controlled by any one of the switch mode control circuit and the LDO mode control circuit, so that the switch unit connected with the corresponding output interface can output different voltages, and further, the switch unit can be compatible with fast charging and slow charging during multi-port output.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a circuit diagram of a single-inductor-transformer multi-voltage independent output circuit of the prior art;
fig. 2 is a schematic structural diagram of a single-inductor voltage-transforming multi-voltage independent output circuit according to an embodiment of the present application;
fig. 3 is a circuit diagram of a single-inductor-transformer multi-voltage independent output circuit according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, system, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The following description will be given of terms related to the present application.
At present, with the development of the quick charging technology, more and more USB interface forms are produced. Under the condition that electronic equipment is more and more at present, sometimes a plurality of electronic equipment need to be charged, and in order to better take account of charging different equipment at the same time, a plurality of charging schemes with more than two output ports are provided on the market. The more the variety of outlet output voltages can cover the market, the more popular it is.
In the existing power output scheme of single inductance transformation, because the master control circuit directly controls the conduction state of each MOS tube, when multi-port output is carried out, the output port can not support different voltage output. As shown in fig. 1, in the scheme of two output ports, the main control circuit directly switches on the MOS transistor Q1 and the MOS transistor Q2, so that the output ports VOUT1 and VOUT2 can only share one Voltage (VSYS) for output, the output voltage of each interface cannot be flexibly adjusted, and the fast charging and slow charging cannot be simultaneously performed, which is poor in compatibility.
In order to solve the above problem, an embodiment of the present application provides a single-inductor voltage-transforming multi-voltage independent output circuit, which is configured with an input interface and a plurality of output interfaces, wherein the input interface is connected to the single-inductor voltage-transforming circuit to access a first power supply voltage, and the plurality of output interfaces are used for accessing an electrical device and supplying power to the electrical device. The single-inductance voltage transformation multi-voltage independent output circuit can be applied to the scene of multi-port output in the single-inductance voltage transformation circuit. Whether each output interface in the plurality of output interfaces is connected with the electric equipment or not can be detected through an automatic starting detection circuit, and when the electric equipment is detected, an access signal is output; outputting a corresponding enable control signal through a main control circuit when the access signal is received, and outputting a first enable signal through a switch mode control circuit when the enable control signal is received; outputting a second enabling signal when the enabling control signal is received through the LDO mode control circuit; each switch unit in the plurality of switch units is conducted according to the control of the first enable signal or the second enable signal so as to output a second power supply voltage to corresponding electric equipment through the connected output interface, wherein the second power supply voltage is obtained after the first power supply voltage passes through the switch unit; meanwhile, an input interface, the first switch unit and the second switch unit are connected through a current threshold detection circuit, and the current value of each output interface is detected; then outputting the corresponding enabling control signal according to the current value through a main control circuit; and finally, adjusting the control mode of the corresponding switch unit in the plurality of switch units through a switch mode control circuit and/or an LDO mode control circuit, and further adjusting the power supply voltage of the plurality of output interfaces. Therefore, each switch unit is controlled by any one of the switch mode control circuit and the LDO mode control circuit, so that the switch unit connected with the corresponding output interface can output different voltages, and further, the switch unit can be compatible with fast charging and slow charging during multi-port output. The present solution may be applied to a variety of scenarios, including but not limited to the application scenarios mentioned above.
The specific method is described in detail below.
Referring to fig. 2, the present application further provides a multi-voltage independent output circuit 10 with a single-inductor voltage transformation, which is configured with an input interface and a plurality of output interfaces, wherein the input interface is connected to the single-inductor voltage transformation circuit 20 to access a first power supply voltage, and the plurality of output interfaces (e.g., OUT1 to OUTN shown in fig. 2) are used to access and supply power to an electric device; the single-inductor voltage-transforming multi-voltage independent output circuit 10 comprises an automatic start-up detection circuit 101, a current threshold detection circuit 107, a main control circuit 102, a switch mode control circuit 103, an LDO mode control circuit 104 and a plurality of switch units (such as switch units 1 to N shown in fig. 2);
the automatic power-on detection circuit 101 is configured to detect whether each output interface of the multiple output interfaces is connected to the electrical device, and output an access signal when the electrical device is detected;
the main control circuit 102 is connected to the auto-on detection circuit 101, and configured to output a corresponding enable control signal to the switch mode control circuit 103 when receiving the access signal;
the switch mode control circuit 103 is connected to the main control circuit 102, and configured to output a first enable signal when receiving the enable control signal;
the LDO mode control circuit 104 is connected to the main control circuit 102, and configured to output a second enable signal when receiving the enable control signal;
the plurality of switch units are connected to the input interface, the switch mode control circuit 103, and the LDO mode control circuit 104, and are connected to the plurality of output interfaces in a one-to-one correspondence manner, each switch unit is configured to be turned on by control of the first enable signal or the second enable signal, so as to output a first power supply voltage or a second power supply voltage to a corresponding electrical device through the connected output interface, where the second power supply voltage is a power supply voltage obtained after the first power supply voltage passes through the corresponding switch unit;
the current threshold detection circuit 107 is connected to the input interface and the plurality of switch units, and is configured to detect a current value of the output interface corresponding to a switch unit that has been turned on among the plurality of switch units;
the main control circuit 102 is further configured to output the corresponding enable control signal to the switch mode control circuit 103 or the LDO mode control circuit 104 according to the magnitude of the current value when receiving the current value.
In a specific implementation, as shown in fig. 2, the voltage is boosted by the single-inductor voltage transformation circuit 20, and then the first power supply voltage is output from the output port VSYS to the single-inductor voltage transformation multi-voltage independent output circuit 10, and the first power supply voltage outputs multiple paths of first power supply voltages in parallel to the single-inductor voltage transformation multi-voltage independent output circuit 10 according to the number of the output interfaces, so as to form multiple paths of voltage output. When multiple voltage outputs are performed, the switch unit of the same output path can select the switch mode control circuit 103 or the LDO mode control circuit 104 to output, so that different output paths can output different voltages. The LDO mode control circuit 104 puts the corresponding switch unit in a half-on condition, achieving a constant 5V output voltage (i.e. the second supply voltage). The main control circuit 102 selects the switching mode control circuit 103 or the LDO mode control circuit 104 according to the current value sampled by the current threshold detection circuit 107 on the corresponding output interface. When the current value is smaller, the corresponding switch unit is controlled by the LDO mode control circuit 104; when the current value is larger, the current value is switched to the switch mode control circuit 103 to control the corresponding switch unit. The switch mode control circuit 103 and the LDO mode control circuit 104 are configured to allow the single-inductor voltage-transforming multi-voltage independent output circuit 10 to implement multi-port multi-voltage independent output of a single-inductor scheme.
It will be appreciated that the supported fast charging protocol is the same or different between each two output interfaces.
It can be seen that, in the embodiment of the present application, the single-inductor voltage-transforming multi-voltage independent output circuit 10 is configured with an input interface and a plurality of output interfaces; the single-inductor voltage transformation multi-voltage independent output circuit 10 outputs an access signal when detecting that any output interface is accessed to electric equipment through the automatic startup detection circuit 101; a current threshold detection circuit 107 detects a current value of each of the output interfaces; the main control circuit 102 outputs a corresponding enable control signal when receiving the access signal, and is configured to output the corresponding enable control signal according to the current value; the switch mode control circuit 103 outputs a first enable signal when receiving the enable control signal; the LDO mode control circuit 104 outputs a second enable signal when receiving the enable control signal; and each switch unit is used for conducting according to the control of the first enabling signal or the second enabling signal so as to output a second power supply voltage to the corresponding electric equipment through the connected output interface. In this way, each switch unit is controlled by one of the switch mode control circuit 103 and the LDO mode control circuit 104, so that the switch unit connected to the corresponding output interface can output different voltages, and thus, the fast charging and slow charging can be compatible when outputting in multiple ports; and the multi-voltage independent output circuit can switch between the switch mode control circuit and the LDO mode control circuit according to the requirements of the electric equipment, so that the corresponding switch unit outputs the power supply voltage required by the electric equipment from the corresponding output interface, and the power supply flexibility and the applicability to the electric equipment with different specifications are improved.
The multi-voltage independent output circuit is described below by taking a scheme of two switch units and two output interfaces as an example.
Referring to fig. 3, the enable control signal includes a first enable control signal, a second enable control signal, a third enable control signal, and a fourth enable control signal, and the plurality of switch units include a first switch unit 105 and a second switch unit 106; the plurality of output interfaces comprise a first output interface VOUT1 and a second output interface VOUT2;
the first switch unit comprises a first MOS tube Q1, the second switch unit comprises a second MOS tube Q2, the drain electrode of the first MOS tube Q1 and the drain electrode of the second MOS tube Q2 are connected with a current threshold value detection circuit 107 and a single inductance transformation circuit 20, the source electrode of the first MOS tube is connected with an automatic start-up detection circuit 101 and a first output interface VOUT1, the source electrode of the second MOS tube is connected with the automatic start-up detection circuit 101 and a second output interface VOUT2, the grid electrode of the first MOS tube is connected with the first control end of the switch mode control circuit and the first control end of the LDO mode control circuit, and the grid electrode of the second MOS tube is connected with the second control end of the switch mode control circuit and the second control end of the LDO mode control circuit.
The switch mode control circuit 103 is specifically configured to output the first enable signal EN1 to the first switch unit 105 when receiving the first enable control signal, and output the first enable signal EN1 to the second switch unit 106 when receiving the third enable control signal; the LDO mode control circuit 104 is specifically configured to output the second enable signal EN2 to the first switch unit 105 when receiving the second enable control signal, and output the second enable signal EN2 to the second switch unit 106 when receiving the fourth enable control signal. The first switch unit 105, connected to the input interface, the first output interface VOUT1, the switch mode control circuit 103, and the LDO mode control circuit 104, is configured to change its own conduction state according to the first enable signal EN1 to output a first supply voltage to the first output interface VOUT1, or change its own conduction state according to the second enable signal EN2 to output a second supply voltage to the first output interface VOUT 1; the second switch unit 106 is connected to the input interface, the second output interface VOUT2, the switch mode control circuit 103, and the LDO mode control circuit 104, and configured to change its own conduction state according to the first enable signal EN1 to output a first supply voltage to the first output interface VOUT1, or change its own conduction state according to the second enable signal EN2 to output a second supply voltage to the first output interface VOUT 1.
Specifically, when the first output interface VOUT1 is connected to a first electrical device, the auto-start detection circuit 101 detects the first electrical device, and outputs a first access signal to the main control circuit 102; when receiving the first access signal, the main control circuit 102 sends the first enable control signal to the switch mode control circuit 103; the switch mode control circuit 103 outputs the first enable signal EN1 to the first switch unit 105 according to the first enable control signal; the first switch unit 105 is controlled by the first enable signal EN1 to be completely turned on, and outputs the first supply voltage to the first electrical device through the first output interface VOUT 1;
the current threshold detection circuit 107 detects a first current value of the first output interface VOUT1, and outputs the first current value to the main control circuit 102; the master control circuit 102 determines that the first current value is less than a first threshold value (I) H ) Then, the second enable control signal is output to the LDO mode control circuit 104; when receiving the second enable control signal, the LDO mode control circuit 104 outputs the second enable signal EN2 to the first switch unit 105, and the first switch unit 105 is controlled by the second enable signal EN2 to be half-on, and outputs the second supply voltage to the electric device through the first output interface VOUT 1.
In a specific implementation, when the first output interface VOUT1 is plugged into a first electrical device, the auto-power-on detection circuit 101 detects a first access signal from the first output interface VOUT1, and the auto-power-on detection circuit 101 outputs the first access signal to the first access signal. When receiving the first access signal, the main control circuit 102 sends a first enable control signal to the switch mode control circuit 103. The switching mode control circuit 103 outputs a first enable signal EN1 to the first switching unit 105 under the control of the first enable control signal. The first switch unit 105 is controlled by the first enable signal EN1 and is completely turned on, so that the first power supply voltage can completely pass through the first switch unit 105, and the first power supply voltage is output to the first electrical device through the first output interface VOUT 1.
Further, in the initial stage of only accessing the first electric device, the switch mode control circuit 103 controls the first switch to be completely turned on to output the fast charging voltage to the first electric device. At this time, the current threshold detection circuit 107 detects a first current value of the first output interface VOUT1, and then outputs the first current value to the main control circuit 102, the main control circuit 102 may determine a magnitude of the first current value, and when the first current value is smaller than a first threshold, outputs a second enable control signal to the LDO mode control circuit 104, and the second enable control circuit may control the LDO mode control circuit 104 to output a second enable signal EN2 to the first switch unit 105, so that the first switch unit 105 is semi-conductive, and the voltage output to the first output interface VOUT1 by the first switch unit 105 is reduced, thereby converting fast charging into slow charging, and charging the first electric device with a voltage of 5V.
It can be seen that, in this embodiment, when a single electrical device is connected to an output interface, a fast charging voltage is output first, then the current threshold detection circuit 107 detects the current value of the output interface in real time, the power supply mode is adjusted according to the magnitude of the current value, when the current value is smaller than the first threshold, the control circuit 104 is switched to the LDO mode to control the switch unit, so as to limit the voltage output to the connected single electrical device, and the fast charging is switched to the slow charging, so that the low-power charging of the low-current device and the high-power charging of the high-current device are realized, and the charging compatibility of the single-inductance voltage-transformation multi-voltage independent output circuit is improved.
After the first output interface VOUT1 is connected to the first electrical device, if the second output interface VOUT2 is connected to a second electrical device, the auto-power-on detection circuit 101 detects the second electrical device, and outputs a second access signal to the main control circuit 102; when receiving the second access signal, the main control circuit 102 outputs a fourth enable control signal to the LDO mode control circuit 104; the LDO mode control circuit 104 outputs a second enable signal EN2 to the second switch unit 106 according to the fourth enable control signal; the second switch unit 106 is controlled by the second enable signal EN2 to be in a semi-conducting state, and outputs the second supply voltage to the second electrical device through the second output interface VOUT 2.
In specific implementation, when the first output interface VOUT1 is charging the first electric device, if a second electric device is accessed from the second output interface VOUT2, the requirement on system power consumption is high because double outputs are performed at the time; therefore, when the main control circuit 102 receives the second access signal, it outputs a fourth enable control signal to the LDO mode control circuit 104, so as to control the LDO mode control circuit 104 to output a second enable signal EN2 to the second switch unit 106, so that the second switch unit 106 is turned on half, and 5V voltage is provided to the second electrical device through the second output interface VOUT2 for charging.
It can be seen that, in this embodiment, the switching mode control circuit 103 and the LDO mode control circuit 104 control different output interfaces to perform fast charging and slow charging, so that the output of multiple ports is satisfied, and simultaneously, different charging modes can be compatible, and the diversity of the charging modes is improved.
When the second output interface VOUT2 outputs a second power supply voltage, the current threshold detection circuit 107 detects a second current value of the second output interface VOUT2, and outputs the second current value to the main control circuit 102;
when determining that the second current value is greater than the first threshold value, the main control circuit 102 outputs the third enable control signal to the switch mode control circuit 103 and controls the LDO mode control circuit 104 to stop outputting the second enable signal EN2 to the second switch unit 106; when the switch mode control circuit 103 receives the third enable control signal, the first enable signal EN1 is output to the second switch unit 106, the second switch unit 106 is controlled by the first enable signal EN1 to be completely turned on, and the first supply voltage is continuously output to the second electrical device through the second output interface VOUT 2.
In a specific implementation, the 5V voltage is output at an initial stage of accessing the second electrical device, then the second current value of the second output interface VOUT2 is detected according to the current threshold detection circuit 107, and then the second current value is output to the main control circuit 102. The main control circuit 102 may determine the second current value, and when the second current value is greater than the first threshold, the third enable control circuit outputs a third enable control signal to the switch mode control circuit 103, and the third enable control circuit may control the switch mode control circuit 103 to output the first enable signal EN1 to the second switch unit 106, so that the second switch unit 106 is completely turned on, and the voltage output by the second switch unit 106 to the first output interface VOUT1 is increased or decreased, so as to convert slow charging into fast charging, and perform fast charging on the second electrical device.
It can be seen that, in this embodiment, the current threshold detection circuit 107 is used to detect the second current value of the second output interface VOUT2, and when the second current value is greater than the first preset threshold, the second output interface VOUT2 is fast charged, so that the fast charging and the slow charging are switched.
When the first output interface VOUT1 and the second output interface VOUT2 both output a first power supply voltage, the current threshold detection circuit 107 detects the first current value and the second current value, and outputs the first current value and the second current value to the main control circuit 102;
the master control circuit 102 determines that the first current value is less than a second threshold value (I) L ) When the first enable signal is not output to the LDO mode control circuit 104, the switching mode control circuit 103 is controlled to stop outputting the first enable signal EN1 to the first switching unit 105; when receiving the second enable control signal, the LDO mode control circuit 104 outputs a second enable signal EN2 to the first switch unit 105, and the first switch unit 105 is controlled by the second enable signal EN2 to be semi-conductive, and continuously outputs the second supply voltage to the first electrical device through the first output interface VOUT 1.
In a specific implementation, when a first current value of the first output interface VOUT1 changes and is smaller than a second threshold, the main control circuit 102 stops outputting a first enable control signal to the switch mode control circuit 103, so that the switch mode control circuit 103 stops outputting a first enable signal EN1 to the first switch unit 105; meanwhile, the main control circuit 102 outputs a second enable control signal to the LDO mode control circuit 104, so that the LDO mode control circuit 104 outputs a second enable signal EN2 to the first switch unit 105, the LDO mode control circuit 104 controls the first switch unit 105 to be semi-conductive, and then the first output interface VOUT1 outputs 5V charging voltage.
It can be seen that, in this embodiment, during dual output, the first current value of the first output interface VOUT1 can be detected by the current threshold detection circuit 107, so as to adjust the output voltage of the first output interface VOUT1, and flexibly adjust the power supply scheme.
The present application further provides a power adapter, comprising the single-inductor voltage transformation multi-voltage independent output circuit described above.
The present application further provides an electronic device, which includes the single-inductor-transforming multi-voltage independent output circuit described above, or the power adapter described above.
Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions without departing from the spirit and scope of the invention, and all changes and modifications can be made, including different combinations of functions, implementation steps, software and hardware implementations, all of which are included in the scope of the invention.
Claims (10)
1. The single-inductance-transformation multi-voltage independent output circuit is characterized by being provided with an input interface and a plurality of output interfaces, wherein the input interface is connected with the single-inductance-transformation circuit to access a first power supply voltage, and the plurality of output interfaces are used for accessing electric equipment and supplying power to the electric equipment; the multi-voltage independent output circuit comprises an automatic starting detection circuit, a current threshold detection circuit, a main control circuit, a switch mode control circuit, an LDO mode control circuit and a plurality of switch units;
the automatic starting detection circuit is used for detecting whether each output interface in the plurality of output interfaces is connected with the electric equipment or not and outputting an access signal when the electric equipment is detected;
the main control circuit is connected with the automatic starting detection circuit and used for outputting a corresponding enabling control signal to the switch mode control circuit when receiving the access signal;
the switch mode control circuit is connected with the main control circuit and used for outputting a first enabling signal when receiving the enabling control signal;
the LDO mode control circuit is connected with the main control circuit and is used for outputting a second enabling signal when receiving the enabling control signal;
the plurality of switch units are connected with the input interface, the switch mode control circuit and the LDO mode control circuit, and are connected with the plurality of output interfaces in a one-to-one correspondence manner, each switch unit is used for being conducted under the control of the first enable signal or the second enable signal so as to output a first power supply voltage or a second power supply voltage to corresponding electric equipment through the connected output interface, and the second power supply voltage is the power supply voltage obtained after the first power supply voltage passes through the corresponding switch unit;
the current threshold detection circuit is connected with the input interface and the plurality of switch units and is used for detecting the current value of the output interface corresponding to the switched-on switch unit in the plurality of switch units;
and the main control circuit is also used for outputting the corresponding enabling control signal to the switch mode control circuit or the LDO mode control circuit according to the magnitude of the current value when receiving the current value.
2. The multi-voltage independent output circuit according to claim 1, wherein the enable control signal comprises a first enable control signal, a second enable control signal, a third enable control signal, and a fourth enable control signal, and the plurality of switching units comprises a first switching unit and a second switching unit;
the switch mode control circuit is specifically configured to output the first enable signal to the first switch unit when receiving the first enable control signal, and output the first enable signal to the second switch unit when receiving the third enable control signal;
the LDO mode control circuit is specifically configured to output the second enable signal to the first switch unit when receiving the second enable control signal, and output the second enable signal to the second switch unit when receiving the fourth enable control signal.
3. The multi-voltage independent output circuit of claim 2, wherein the plurality of output interfaces includes a first output interface and a second output interface;
the first switch unit is connected with the input interface, the first output interface, the switch mode control circuit and the LDO mode control circuit, and is used for changing the self conduction state according to the first enable signal so as to output a first power supply voltage to the first output interface, or changing the self conduction state according to the second enable signal so as to output a second power supply voltage to the first output interface;
the second switch unit is connected to the input interface, the second output interface, the switch mode control circuit and the LDO mode control circuit, and configured to change a conduction state of the second switch unit according to the first enable signal to output a first supply voltage to the first output interface, or change a conduction state of the second switch unit according to the second enable signal to output a second supply voltage to the first output interface.
4. The multi-voltage independent output circuit of claim 3, wherein when the first output interface is connected to a first electrical device, the auto-power-on detection circuit detects the first electrical device and outputs a first access signal to the main control circuit; when the main control circuit receives the first access signal, the main control circuit outputs the first enabling control signal to the switch mode control circuit; the switch mode control circuit outputs the first enable signal to the first switch unit according to the first enable control signal; the first switch unit is controlled by the first enable signal to be completely conducted, and the first power supply voltage is output to the first electric equipment through the first output interface;
the current threshold detection circuit detects a first current value of the first output interface and outputs the first current value to the main control circuit; the main control circuit outputs the second enabling control signal to the LDO mode control circuit when determining that the first current value is smaller than a first threshold value; when receiving the second enable control signal, the LDO mode control circuit outputs the second enable signal to the first switch unit, the first switch unit is controlled by the second enable signal to be semi-conductive, and the second supply voltage is output to the electric equipment through the first output interface.
5. The multi-voltage independent output circuit according to claim 4, wherein after the first output interface is connected to the first electrical device, if the second output interface is connected to a second electrical device, the auto-on detection circuit detects the second electrical device and outputs a second access signal to the main control circuit; when the main control circuit receives the second access signal, a fourth enabling control signal is output to the LDO mode control circuit; the LDO mode control circuit outputs the second enable signal to the second switch unit according to the fourth enable control signal; the second switch unit is controlled by the second enable signal to be in semi-conduction, and the second power supply voltage is output to the second electrical equipment through the second output interface.
6. The multi-voltage independent output circuit according to claim 5, wherein when the second output interface outputs the second supply voltage, the current threshold detection circuit detects a second current value of the second output interface and outputs the second current value to the main control circuit;
when determining that the second current value is greater than the first threshold value, the main control circuit outputs the third enable control signal to the switch mode control circuit and controls the LDO mode control circuit to stop outputting the second enable signal to the second switch unit; and when receiving the third enabling control signal, the switch mode control circuit outputs a first enabling signal to the second switch unit, the second switch unit is controlled by the first enabling signal to be completely switched on, and the first power supply voltage is continuously output to the second electrical equipment through the second output interface.
7. The multi-voltage independent output circuit of claim 6, wherein when the first output interface and the second output interface both output a first supply voltage, the current threshold detection circuit detects the first current value and the second current value and outputs the first current value and the second current value to the main control circuit;
when the main control circuit determines that the first current value is smaller than a second threshold value, the main control circuit outputs the second enable control signal to the LDO mode control circuit and controls the switch mode control circuit to stop outputting the first enable signal to the first switch unit; when receiving the second enable control signal, the LDO mode control circuit outputs a second enable signal to the first switch unit, the first switch unit is controlled by the second enable signal to be semi-conductive, and the second supply voltage is continuously output to the first electric equipment through the first output interface.
8. A multi-voltage independent output circuit according to any of claims 1-7, wherein the supported fast charging protocols between each two output interfaces are the same or different.
9. A power adapter comprising the single inductor transformed multiple voltage independent output circuit of any one of claims 1 to 8.
10. An electronic device comprising the single-inductor-transformer multi-voltage independent output circuit of any one of claims 1 to 8 or the power adapter of claim 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211333087.5A CN115395762B (en) | 2022-10-28 | 2022-10-28 | Single-inductor voltage transformation multi-voltage independent output circuit and related product |
| PCT/CN2023/076702 WO2024087418A1 (en) | 2022-10-28 | 2023-02-17 | Multi-voltage independent output circuit of single-inductor transformer and related product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211333087.5A CN115395762B (en) | 2022-10-28 | 2022-10-28 | Single-inductor voltage transformation multi-voltage independent output circuit and related product |
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| CN115395762A true CN115395762A (en) | 2022-11-25 |
| CN115395762B CN115395762B (en) | 2023-03-24 |
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|---|---|---|---|
| CN202211333087.5A Active CN115395762B (en) | 2022-10-28 | 2022-10-28 | Single-inductor voltage transformation multi-voltage independent output circuit and related product |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115395762B (en) |
| WO (1) | WO2024087418A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN115395762B (en) | 2023-03-24 |
| WO2024087418A1 (en) | 2024-05-02 |
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