CN110165876B - Power supply circuit and electronic equipment thereof - Google Patents
Power supply circuit and electronic equipment thereof Download PDFInfo
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- CN110165876B CN110165876B CN201910407585.1A CN201910407585A CN110165876B CN 110165876 B CN110165876 B CN 110165876B CN 201910407585 A CN201910407585 A CN 201910407585A CN 110165876 B CN110165876 B CN 110165876B
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- 238000006243 chemical reaction Methods 0.000 claims description 13
- 230000010354 integration Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 7
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Classifications
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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
- H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
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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
- H02M1/0012—Control circuits using digital or numerical techniques
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Abstract
A power supply circuit and an electronic device thereof are disclosed, the power supply circuit includes a memory storing external configuration data, the configuration data including at least one amplitude parameter; the register reads the configuration data and sets a register value according to at least one amplitude parameter; the timer enables the register to read at least part of amplitude parameters in the configuration data at set time intervals; and the digital-to-analog converter is connected with the register to output a corresponding voltage signal according to the register value, wherein in the alternating current mode, the power supply circuit provides an alternating current voltage signal according to the configuration data. The power supply circuit of the invention sets the value in the register through the configuration data in the memory, and does not need to acquire the externally provided configuration data in real time, thereby improving the stability of the power supply circuit and reducing the integration complexity of the power supply circuit.
Description
Technical Field
The invention relates to the technical field of power supply, in particular to a power supply circuit and electronic equipment thereof.
Background
As the functions of electronic devices become more complex, the requirements for power supply chips for supplying power to the back-end circuits in the electronic devices become higher and higher. The electronic device generally needs a power supply chip to provide an alternating voltage and a direct voltage.
The conventional power supply chip generates a direct current voltage and an alternating current voltage required by a back-end circuit of the electronic device by controlling and updating a digital signal in real time. However, the above power supply chip at least needs to integrate the micro control chip, the digital signal chip and the operational amplifier, and the power supply chip has complicated circuits, high cost, unstable integration and potential risks.
Therefore, it is necessary to provide a power supply circuit and an electronic device thereof to solve the above-mentioned existing technical problems.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a power supply circuit and an electronic device thereof, so as to improve the stability of the power supply circuit in the electronic device and reduce the integration complexity of the power supply circuit.
According to an aspect of the present invention, there is provided a power supply circuit including: a memory storing externally input configuration data, the configuration data including at least one magnitude parameter; a register to read the configuration data to set a register value according to the at least one magnitude parameter; a timer connected with the memory and the register so as to enable the register to read at least part of amplitude parameters in the configuration data at set time intervals; and the digital-to-analog converter is connected with the register to output a corresponding voltage signal according to the register value, wherein in an alternating current mode, the power supply circuit provides the voltage signal in an alternating current form according to the configuration data.
Preferably, the power supply circuit further includes: the voltage selection module provides one of a plurality of selectable voltages to the digital-to-analog converter in an alternating current mode so as to adjust the amplitude of the voltage signal in an alternating current form.
Preferably, in the ac mode, the register cyclically reads the configuration data.
Preferably, the power supply circuit further has a dc mode, the configuration data further includes a mode parameter, the timer is turned off according to the mode parameter when the mode parameter represents the dc mode, the register sets the register value according to one amplitude parameter, the timer is turned on according to the mode parameter when the mode parameter represents the ac mode, and the register sets the register value according to a plurality of amplitude parameters.
Preferably, the configuration data further comprises a period parameter for adjusting the frequency of the voltage signal in alternating form.
Preferably, the power supply circuit further includes: and the voltage conversion module is used for respectively converting the voltage signals and/or the power supply voltage corresponding to the register values in each register area so as to obtain a plurality of voltage signals in a direct current mode.
Preferably, the voltage conversion module includes: and the boosting unit is connected with and receives the power supply voltage so as to convert the power supply voltage into a first voltage in a direct current form.
Preferably, the voltage conversion module further includes: and the positive charge pump unit is connected with the digital-to-analog converter and receives a voltage signal corresponding to a register value of the first register area of the register to convert the voltage signal into a second voltage in a direct current form, or is connected with the boosting unit and receives the power supply voltage to convert the power supply voltage into the second voltage in the direct current form.
Preferably, the voltage conversion module further includes: and the negative charge pump unit is connected with the digital-to-analog converter and receives a voltage signal corresponding to a register value of a second register area of the register to convert the voltage signal into a third voltage in a direct current form, or is connected with the boosting unit and receives the power supply voltage to convert the third voltage in the direct current form.
According to the power supply circuit, the memory, the timer and the register are arranged, and in the power supply circuit, the operation of writing the memory into the register can be controlled through the timer to obtain the voltage waveform in an alternating current form. And part of the direct current voltage can be obtained by processing the external power supply voltage or can be obtained by converting externally input configuration data. The power supply circuit of the invention sets the value in the register through the memory, does not need to acquire externally provided configuration data in real time, improves the stability of the power supply circuit, reduces the integration complexity of the power supply circuit, and can provide various voltage waveforms according to requirements to support the normal work of a back end circuit.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a power supply circuit provided in accordance with an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power supply circuit provided in an ac mode according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a configuration of a power supply circuit in a dc mode according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating another configuration of the power supply circuit in the dc mode according to the embodiment of the present invention.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
Fig. 1 shows a schematic structural diagram of a power supply circuit provided according to an embodiment of the present invention, and as shown in fig. 1, the power supply circuit 100 includes a memory 110, a register 120, a digital-to-analog converter 130, and a timer 140.
The memory 110 receives and stores externally input configuration data D0, for example, connected to a control system of the electronic device through a communication interface to receive the configuration data D0. The memory 110 may be, for example, a volatile memory or a non-volatile memory. Wherein the configuration data D0 includes at least one magnitude parameter, and a mode parameter. The amplitude parameter is used to characterize the waveform of the generated voltage signal, and the mode parameter is used to characterize the waveform form of the generated voltage signal.
The register 120 includes, for example, a first register area, a second register area, a third register area, a fourth register area and a fifth register area, the first voltage VGH in a direct current form is generated after a voltage signal conversion process corresponding to the register value in the first register area, the second voltage VG L in a direct current form is generated after a voltage signal conversion process corresponding to the register value in the second register area, the third voltage AVDD in a direct current form is obtained from a voltage signal corresponding to the register value in the third register area, the fourth voltage VCOM-DC in a direct current form is obtained from a voltage signal corresponding to the value in the fourth register area, and the voltage VCOM-AC in an alternating current form is generated after a voltage signal process corresponding to the register value in the fifth register area.
The timer 140 is connected to the memory 110 and the register 120 respectively, so that the register 120 reads at least a part of the magnitude parameters in the configuration data D0 stored in the memory 110 at set time intervals. Specifically, the timer 140 is started in the ac mode of the power supply circuit, for example, when the register value of the fifth register area in the register 120 is set, the timer 140 sets a set time T during which the memory 110, for example, continuously writes the array D1 composed of the plurality of configuration data D0 into the first register area of the register 120. In the dc mode of the power supply circuit, for example, when setting the value of the second register area in the register 120, the timer 140 sets a set time T according to the system clock, for example, in which the register 120 reads the configuration data D0 and writes at least a part of the amplitude parameter thereof into the fifth register area of the register 120.
The dac 130 is connected to the register 120 to read the register values of different register areas in the register 120 and convert the register values into corresponding voltage signals, so as to provide the back-end circuit with the AC voltage VCOM-AC, the DC voltage VCOM-DC, the DC voltage VGH, the DC voltage VG L, and the DC voltage AVDD.
The configuration data stored in the memory 110 includes a mode parameter, when the mode parameter represents the dc mode, the timer 140 is turned off according to the mode parameter, the register area of the register 120 sets a register value according to the read one amplitude parameter, and then outputs a corresponding voltage signal through the digital-to-analog converter, the amplitude of the voltage signal is constant, and the corresponding voltage waveform is in the dc form. When the mode parameter represents the ac mode, the timer 140 is started according to the mode parameter, the register 120 sets a register value according to the read plurality of amplitude parameters, and then outputs a corresponding voltage signal through the digital-to-analog converter, where the waveform of the voltage signal is ac.
The power supply circuit provided by the invention can store configuration data by arranging the memory, the timer and the register so as to provide different voltage waveforms for the subsequent circuit. And the supply circuit of the invention may provide both an alternating voltage as well as a direct voltage, a specific embodiment of the supply circuit will be described below.
Fig. 2 is a schematic diagram illustrating a power supply circuit in an ac mode according to an embodiment of the present invention, and as shown in fig. 2, when the power supply circuit is in the ac mode, a voltage signal in an ac form required by the back-end circuit may be generated.
The memory 110 receives and stores externally input configuration data D0 through a communication interface, the configuration data D0 being written to the memory 110 by, for example, an external control system, and the communication interface writes the configuration data D0 into the memory 110 through, for example, an IIC communication protocol. The configuration data D0 includes a mode parameter, a period parameter, and a plurality of amplitude parameters. The period parameter in the configuration data D0 is used to adjust the frequency of the generated voltage signal in ac form.
The fifth register area of the register 120 is connected to the memory 110, and the timer 140 is started according to the mode parameter of the configuration data D0, and the timer 140 enables the register 120 to read at least a part of the magnitude parameter in the configuration data at set time intervals. In setting the value of the fifth register area of the register 120, the memory 110 continuously writes some or all of the amplitude parameters in the configuration data D0 into the fifth register area for the set time T output from the timer 140, and the memory 110 writes the remaining part of the amplitude parameters in the configuration data D0 into the fifth register area for the next set time T. When the register 120 finishes reading the magnitude parameter in the configuration data of the memory 110, the loop continues to read the magnitude parameter in the configuration data D0.
The dac 131 is connected to the fifth register area of the register 120 and connected to the voltage selection module 180 to receive at least one of a plurality of selectable voltages for adjusting the amplitude of the generated voltage signal in the form of alternating current. For example, the voltage selection module 180 provides the digital-to-analog converter 131 with a first selectable voltage V1 and a second selectable voltage V2, the magnitude of the AC common voltage VCOM-AC being set according to a first selectable voltage V1 and a second selectable voltage V2, wherein the first selectable voltage V1 and the second selectable voltage V2 are adjustable, and the first selectable voltage V1 and the second selectable voltage V2 may be provided by the power supply circuit, for example.
The power supply circuit of the present invention is controlled by a timer to set register values in a register according to configuration data stored in a memory to provide an alternating current type voltage VCOM-AC with an adjustable amplitude in an alternating current mode.
Fig. 3 is a schematic diagram illustrating a configuration of a power supply circuit in a dc mode according to an embodiment of the present invention, and as shown in fig. 3, when the power supply circuit is in the dc mode, a voltage signal waveform in a dc form required by the back-end circuit can be generated.
The memory 110 receives and stores externally input configuration data D0 through a communication interface, the configuration data D0 being written to the memory 110 by, for example, an external control system, and the communication interface writes the configuration data D0 into the memory 110 through, for example, an IIC communication protocol. The configuration data D0 includes a mode parameter and a plurality of magnitude parameters. According to the mode parameter off-timer 140, a plurality of amplitude parameters are written in a plurality of register areas, respectively, or one of the plurality of amplitude parameters is written in one register area, to generate a plurality of voltage signal waveforms in direct current form simultaneously or individually.
The register 120 is connected to the memory 110, reads the configuration data D0 of the memory 110 and writes the configuration data into corresponding different register areas according to the plurality of amplitude parameters. The memory 110 in the dc mode may write the stored configuration data D0 into, for example, the first to fourth register areas in the register 120. For example, when setting the value of the second register area of the register 120, the register 120 reads the configuration data D0 in the memory 110 and sets the register value in the second register area according to a magnitude parameter.
The dac respectively reads the register values in different register areas of the register 120 to convert the register values into corresponding voltage signals.
And the voltage conversion module is used for respectively converting the voltage signals and/or the power supply voltage corresponding to the register values in part or all of the register areas so as to obtain a plurality of voltage signals in a direct current mode. In the dc mode, the register values in each register area may include the same amplitude parameter or different amplitude parameters. Specifically, the voltage conversion module includes a positive charge pump unit 150 and a negative charge pump unit 160.
The dac 132 is connected to the fourth register area of the register 120 to convert the register value read from the fourth register area into a fourth voltage VCOM-DC corresponding to the fourth voltage VCOM-DC.
The dac 135 is connected to the third register area of the register 120 to convert the register value read from the third register area into the third voltage AVDD in dc form corresponding thereto.
The dac 133 is connected to the first register area of the register 120 to convert the value read by the first register area into the first intermediate voltage V3 corresponding to the first intermediate voltage. The positive charge pump unit 150 is connected to the digital-to-analog converter 133 to receive the first intermediate voltage V3 and convert it into a first voltage VGH in dc form, which may be provided to the back-end circuit or input as a first selectable voltage V1 to the digital-to-analog converter 131 to set a magnitude of the voltage VCOM-AC in AC form.
The dac 134 is connected to the second register area of the register 120, so as to convert the value read by the second register area into a second intermediate voltage V4. corresponding thereto, and the negative charge pump unit 160 is connected to the dac 134 to receive the second intermediate voltage V4 and convert it into a second voltage VG L in a dc form, where the second voltage VG L in the dc form may be provided to a back-end circuit, or input as a second optional voltage V2 to the dac 131 to set another amplitude of the voltage VCOM-AC in the AC form.
Fig. 4 is a schematic structural diagram illustrating another configuration of a power supply circuit in a dc mode according to an embodiment of the present invention, and as shown in fig. 4, another implementation manner of a common circuit in the dc mode according to this embodiment is as follows. A boosting unit 170 is additionally arranged in the voltage conversion module on the basis of the embodiment provided in fig. 3.
The boosting unit 170 receives a power supply voltage VIN provided from the outside, and boosts the power supply voltage VIN to obtain a third voltage AVDD in a dc form.
And the boosting unit 170 may be further connected to the positive charge pump unit 150, and the positive charge pump unit 150 converts the third voltage AVDD in the form of direct current to obtain the first voltage VGH in the form of direct current.
The voltage boosting unit 170 may be further connected to the negative charge pump unit 160 to provide a third voltage AVDD in dc form, and then the negative charge pump unit 160 converts the third voltage AVDD to obtain a second voltage VG L in dc form.
In the power supply circuit of the invention, the operation of writing the memory into the register can be controlled by the timer to obtain the voltage waveform in an alternating current form. And part of the direct current voltage can be obtained by processing the external power supply voltage or can be obtained by converting externally input configuration data. The power supply circuit of the invention sets the value in the register through the memory, does not need to acquire externally provided configuration data in real time, improves the stability of the power supply circuit, reduces the integration complexity of the power supply circuit, and can provide various voltage waveforms according to requirements to support the normal work of a back end circuit.
The invention also provides electronic equipment which comprises the power supply circuit, so that voltage signals with different amplitudes and different waveform forms are provided to ensure that the back-end circuit works normally. The electronic device may be, for example, a cell phone, a computer, a tablet, a wearable electronic device, or the like.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. A power supply circuit for providing a plurality of voltage signals to a back-end circuit, comprising:
a memory storing externally input configuration data, the configuration data including at least one magnitude parameter;
a register to read the configuration data to set a register value according to the at least one magnitude parameter;
a timer connected with the memory and the register so as to enable the register to read at least part of amplitude parameters in the configuration data at set time intervals; and
a digital-to-analog converter connected with the register for outputting corresponding voltage signals according to the register value,
a voltage selection module that provides one of a plurality of selectable voltages to the digital-to-analog converter to adjust an amplitude of the voltage signal in AC form in an AC mode,
wherein, in an alternating current mode, the supply circuit provides the voltage signal in alternating current form according to the configuration data.
2. The power supply circuit of claim 1 wherein said register cycles through said configuration data in an ac mode.
3. The power supply circuit of claim 1, wherein the power supply circuit further has a DC mode, the configuration data further includes mode parameters,
when the mode parameter represents a DC mode, the timer is switched off according to the mode parameter, the register sets the register value according to an amplitude parameter,
and when the mode parameter represents an alternating current mode, the timer is started according to the mode parameter, and the register sets the register value according to a plurality of amplitude parameters.
4. The power supply circuit of claim 1 wherein said configuration data further comprises a period parameter for adjusting the frequency of said alternating current form of said voltage signal.
5. The power supply circuit of claim 3, further comprising: and the voltage conversion module is used for respectively converting the voltage signals and/or the power supply voltage corresponding to the register values in each register area so as to obtain a plurality of voltage signals in a direct current mode.
6. The power supply circuit of claim 5, wherein the voltage conversion module comprises:
and the boosting unit is connected with and receives the power supply voltage so as to convert the power supply voltage into a first voltage in a direct current form.
7. The power supply circuit of claim 6, wherein the voltage conversion module further comprises:
and the positive charge pump unit is connected with the digital-to-analog converter and receives a voltage signal corresponding to a register value of the first register area of the register to convert the voltage signal into a second voltage in a direct current form, or is connected with the boosting unit and receives the power supply voltage to convert the power supply voltage into the second voltage in the direct current form.
8. The power supply circuit of claim 6, wherein the voltage conversion module further comprises:
and the negative charge pump unit is connected with the digital-to-analog converter and receives a voltage signal corresponding to a register value of a second register area of the register to convert the voltage signal into a third voltage in a direct current form, or is connected with the boosting unit and receives the power supply voltage to convert the third voltage in the direct current form.
9. An electronic device, characterized in that it comprises a supply circuit according to any one of claims 1-8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910407585.1A CN110165876B (en) | 2019-05-15 | 2019-05-15 | Power supply circuit and electronic equipment thereof |
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| CN201910407585.1A CN110165876B (en) | 2019-05-15 | 2019-05-15 | Power supply circuit and electronic equipment thereof |
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| CN110165876A CN110165876A (en) | 2019-08-23 |
| CN110165876B true CN110165876B (en) | 2020-07-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103869852A (en) * | 2012-12-18 | 2014-06-18 | 宏碁股份有限公司 | Voltage regulating device and electronic device |
| CN105186680A (en) * | 2015-10-10 | 2015-12-23 | 北京明日电力电子有限公司 | Dual-power intelligent controller |
| KR20160090275A (en) * | 2016-07-19 | 2016-07-29 | 장병규 | Inspection device for fabric |
| DE102016125290A1 (en) * | 2016-01-19 | 2017-09-14 | Elmos Semiconductor Aktiengesellschaft | Chained two-wire data bus consisting of two single-wire data buses, each with several differential levels for bidirectional transmission of lighting data based on the JTAG protocol |
| CN107565813A (en) * | 2016-06-30 | 2018-01-09 | 中兴通讯股份有限公司 | Apparatus for adjusting power supply and method, the chip system and method for running chip system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010257280A (en) * | 2009-04-27 | 2010-11-11 | Renesas Electronics Corp | Serial control device, semiconductor device, and serial data transfer method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869852A (en) * | 2012-12-18 | 2014-06-18 | 宏碁股份有限公司 | Voltage regulating device and electronic device |
| CN105186680A (en) * | 2015-10-10 | 2015-12-23 | 北京明日电力电子有限公司 | Dual-power intelligent controller |
| DE102016125290A1 (en) * | 2016-01-19 | 2017-09-14 | Elmos Semiconductor Aktiengesellschaft | Chained two-wire data bus consisting of two single-wire data buses, each with several differential levels for bidirectional transmission of lighting data based on the JTAG protocol |
| CN107565813A (en) * | 2016-06-30 | 2018-01-09 | 中兴通讯股份有限公司 | Apparatus for adjusting power supply and method, the chip system and method for running chip system |
| KR20160090275A (en) * | 2016-07-19 | 2016-07-29 | 장병규 | Inspection device for fabric |
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