CN112803519A - Charging control circuit and charging equipment - Google Patents
Charging control circuit and charging equipment Download PDFInfo
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- CN112803519A CN112803519A CN202011627781.9A CN202011627781A CN112803519A CN 112803519 A CN112803519 A CN 112803519A CN 202011627781 A CN202011627781 A CN 202011627781A CN 112803519 A CN112803519 A CN 112803519A
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- 108700025151 PD protocol Proteins 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 description 24
- 230000001276 controlling effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
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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
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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
- 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
Abstract
The invention provides a charging control circuit and a charging device. The charge control circuit includes: a power conversion circuit comprising a transformer including a first turn ratio output, a second turn ratio output, and a common output commonly connected to the first and second turn ratio outputs; the PD protocol module is connected with the public output end through a power line and used for communicating with external equipment and receiving the charging requirement of the external equipment; and the control module is connected between the power line and the transformer and used for controlling the transformer to output an output voltage matched with the charging requirement through the first turn ratio output end or the second turn ratio output end according to the output voltage on the power line. According to the invention, a programmable voltage output design of the full voltage range of the charging device is achieved.
Description
Technical Field
The invention relates to the field of electronic devices, in particular to a charging control circuit and charging equipment.
Background
With the popularization of portable electronic products and the release of the PD3.0 standard, the range of Programmable voltage output (Programmable Power Supply) therein is 3.3V-21V, and a full range of charging voltage is provided for intelligent equipment.
However, the programmable voltage output range is 3.3V to 21V, and the wide range of voltage regulation thereof poses a great challenge to the technology of a transformer for regulating the output voltage of the power supply voltage and a Flyback Controller.
Therefore, there is a need for a new charging control circuit and a charging device to solve the problems of the prior art.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to solve the problems in the prior art, the present invention provides a charge control circuit, including:
a power conversion circuit comprising a transformer including a first turn ratio output, a second turn ratio output, and a common output commonly connected to the first and second turn ratio outputs, the transformer having a first turn ratio when the transformer outputs a voltage across the first turn ratio output and a second turn ratio when the transformer outputs a voltage across the second turn ratio output, wherein the first turn ratio is different than the second turn ratio;
the PD protocol module is connected with the public output end through a power line and used for communicating with external equipment and receiving the charging requirement of the external equipment;
and the control module is connected between the power line and the transformer and used for controlling the transformer to output an output voltage matched with the charging requirement to the public output end through the first turn ratio output end or the second turn ratio output end according to the output voltage on the power line.
Illustratively, the first turn ratio is less than the second turn ratio.
Illustratively, the control module includes a comparator that compares the output voltage to a set value,
when the output voltage is larger than the set value, the control module controls the transformer to output the output voltage through the first turn ratio output end;
and when the output voltage is greater than the set value, the control module controls the transformer to output the output voltage through the second turn ratio output end.
Illustratively, the first and second turn ratio outputs are connected to the common output through first and second switches, respectively,
the control module controls the transformer to output the output voltage through the first turn ratio output end by controlling the first switch to be opened and the second switch to be closed; and
the control module controls the transformer to output the output voltage through the second turn ratio output end by controlling the second switch to be opened and the first switch to be closed.
For example, when the output voltage is greater than the set value, the control module controls the first switch to be opened and the second switch to be closed.
For example, when the output voltage is greater than the set value, the control module controls the first switch to be closed and the second switch to be opened.
Illustratively, when receiving the charging requirement of the external device, the PD protocol module feeds back the charging requirement to the control module.
Illustratively, the programmable voltage output of the charge control circuit ranges from 3.3V to 21V, and the first set value is set to 11V.
Illustratively, the PD protocol module communicates with an external device through a type-c interface, and the power line is a VUS line.
The invention also provides a charging device comprising the charging control circuit.
According to the charging control circuit and the charging device, the transformer with different turn ratio outputs is adopted, and the turn ratio output of the transformer is switched in a mode of detecting the output voltage on the charging source line, so that the programmable voltage output design of the full voltage range of the power supply is realized, and the design requirements on a flyback controller and the process requirements on the transformer in the design process of the charging device are simplified.
Drawings
The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
In the drawings:
FIG. 1 is a schematic diagram of a charge control circuit;
FIG. 2 is a schematic circuit diagram of a charge control circuit;
wherein the reference numerals
101 transformer
101A common output terminal
1011 first turn ratio output terminal
1012 second turn ratio output terminal
10111 first switch
10121 second switch
102 control module
103 PD protocol module
104 power line
105 ground wire
106 synchronous rectification module 106.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
In order to thoroughly understand the present invention, a detailed description will be given in the following description to explain the charging control circuit and the charging device according to the present invention. It will be apparent that the invention may be practiced without limitation to specific details that are within the skill of one of ordinary skill in the semiconductor arts. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same elements are denoted by the same reference numerals, and thus the description thereof will be omitted.
In order to solve the technical problems in the prior art, the present invention provides a charge control circuit, including:
a power conversion circuit comprising a transformer including a first turn ratio output, a second turn ratio output, and a common output commonly connected to the first and second turn ratio outputs, the transformer having a first turn ratio when the transformer outputs a voltage across the first turn ratio output and a second turn ratio when the transformer outputs a voltage across the second turn ratio output, wherein the first turn ratio is different than the second turn ratio;
the PD protocol module is connected with the public output end through a power line and used for communicating with external equipment and receiving the charging requirement of the external equipment;
and the control module is connected between the power line and the transformer and used for controlling the transformer to output an output voltage matched with the charging requirement to the public output end through the first turn ratio output end or the second turn ratio output end according to the output voltage on the power line.
A charge control circuit according to the present invention is described with reference to fig. 1 and fig. 2, wherein fig. 1 is a schematic structural diagram of the charge control circuit; fig. 2 is a schematic circuit diagram of a charge control circuit.
As shown in fig. 1, the charge control circuit according to the present invention includes a power conversion circuit including a transformer 101 and a control module 102.
The transformer 101 has at least two outputs commonly connected to a common output 101A, including a first turns ratio output 1011 and a second turns ratio output 1012. The first and second turn ratio output terminals 1011 and 1012 are commonly connected to the common output terminal 101A, and the common output terminal 101A is connected to the power supply line 104.
During charging with the charging device, the charging device outputs a voltage to an external charging device through the power line 104. In the present invention, the charging device outputs the voltage of the transformer 101 output from the first turn ratio output terminal 1011 or the voltage output from the second turn ratio output terminal 1012 through the power line 104. When the power line 104 outputs the voltage output by the first turn ratio output terminal 1011, the transformer 101 has a first turn ratio, and when the power line 104 outputs the voltage output by the second turn ratio output terminal 1011, the transformer 101 has a second turn ratio, and the first turn ratio is not equal to the second turn ratio.
The output voltage on the power line of the charging control circuit is adjusted through the transformers with different turn ratio outputs, and the adjustment of the programmable voltage output of the voltage range of the charging equipment can be effectively realized. This can be achieved by merely designing and manufacturing transformers with different turn ratio outputs. Design requirements on a flyback controller and process requirements on a transformer in the design process of the charging equipment are simplified.
As shown in fig. 1, the transformer 101 is also connected to a ground line 105.
With continued reference to fig. 1, the charging control circuit according to the present invention further comprises a control module 102, which controls the transformer 101 to output the voltage outputted by the first turn ratio output terminal 1011 or the voltage outputted by the second turn ratio output terminal 1012 according to the output voltage on the power line 104.
Illustratively, the charging device according to the present invention is a mobile power supply employing a USB PD solution, which performs control of the mobile power supply based on a TypeC protocol and a PD protocol. Specifically, when the external device is connected to the mobile power supply through the type c interface, the type c protocol module of the type c interface detects that the external device is connected to the mobile power supply, sends the detected information of the connected external device to the microcontroller, and charges the mobile power supply or charges the external device through the mobile power supply.
Further, the charging control circuit communicates with the external device through a PD protocol module to obtain the charging requirement of the external device. The PD protocol module feeds back the charging requirement to the transformer, and the transformer adjusts the output voltage to meet the charging requirement of the external equipment.
Illustratively, the charging requirement is a current voltage requirement. Therefore, the PD protocol module feeds back the charging requirement to the transformer, and the transformer adjusts the output voltage to meet the charging requirement of the external equipment.
As shown in fig. 1, the charging control circuit according to the present invention further includes a PD protocol module 103, which is used to communicate with an external device and feed back the charging requirement of the external device to the transformer 101, so that the transformer 101 outputs an output voltage matching the charging requirement.
In an example of the present invention, the external device is a mobile phone, and the PD protocol module performs PD protocol communication with the mobile phone through the Type-C port, and then feeds back the voltage and current requirements of the mobile phone to the transformer for output regulation.
Illustratively, the transformer may be a transformer having a plurality of secondary windings. For example, the transformer may have two secondary winding secondary coils, each having a different number of turns, such that the transformer has a different number of turns under each secondary winding secondary coil.
Referring to fig. 2, a circuit connection schematic of a charge control circuit according to one embodiment of the invention is shown.
The circuit of the charge control circuit is provided with a transformer having two secondary windings AC and AB, and the transformer 101 has a first turn ratio output terminal 1011 and a second turn ratio output terminal 1012 corresponding to the secondary winding AC and the secondary winding AB, respectively, wherein when the transformer 101 outputs a voltage through the first turn ratio output terminal 1011, it supplies power to the outside through the secondary winding AC, and when the transformer 101 outputs a voltage through the second turn ratio output terminal 1012, it supplies power to the outside through the secondary winding AB.
Illustratively, as shown in fig. 2, the number of turns of the secondary winding AC is greater than that of the secondary winding AB, so that the first turn ratio of the transformer 101 when the voltage is output from the first turn ratio output terminal 1011 of the secondary winding AC is smaller than the second turn ratio of the transformer 101 when the voltage is output from the second turn ratio output terminal 1012 of the secondary winding AB. Under different turn ratios, the adjustable range of the voltage is different, the output of larger voltage is adjusted under smaller turn ratio, and the output of small voltage is adjusted under larger turn ratio, thereby realizing the full-range output of the voltage.
The circuit of the charging control circuit is also provided with a control module 102 for controlling the transformer 101 to supply power to the outside through a first turn ratio output end 1011 or a second turn ratio output end 1012. One of the two secondary windings of the transformer 101 is selected by the control module 102 to supply power to the outside, so that voltage regulation in different ranges can be realized under different requirements of external equipment.
Illustratively, as shown in fig. 2, the first turn ratio output terminal 1011 is connected to the power line 104 through a first switch 10111, and the second turn ratio output terminal 1012 is connected to the power line 104 through a second switch 10121.
Illustratively, when the control module 102 controls the first turn ratio output end 1011 of the transformer 101 to output a voltage, the first switch 10111 between the first turn ratio output end 1011 and the power line 104 is controlled to be opened, and the second switch 10121 between the second turn ratio output end 1012 and the power line 104 is controlled to be closed. When the control module 102 controls the second turn ratio output end 1012 of the transformer 101 to output voltage, the second switch 10121 between the second turn ratio output end 1012 and the power line 104 is controlled to be opened, and the first switch 10111 between the first turn ratio output end 1011 and the power line 104 is controlled to be closed.
In an example according to the present invention, the charging device is connected to the external device through a Type-C interface, the PD protocol module performs protocol communication through the Type-C interface, the power line is set as a VBUS line, the charging requirement of the external device is transmitted between the transformer 101 and the PD protocol module 103 through the VBUS line, and the control module 102 samples a voltage on the VBUS line to control the output voltage at the first turn ratio output end 1011 of the transformer 101 or the output voltage at the second turn ratio output end 1012 of the transformer 101.
Illustratively, the control module 102 includes a comparator. The comparator samples the output voltage on the VBUS line output by the transformer, compares the voltage on the VBUS line with a set value, and when the output voltage is greater than the set value, the control module 102 controls the transformer 101 to output the voltage at a first turn ratio output terminal 1011 having an AC secondary winding at a first turn ratio. When the voltage is less than or equal to the set value, the control module 102 controls the transformer 101 to output the voltage at a second turn ratio output terminal 1012 having the AB secondary winding at the second turn ratio.
Illustratively, according to an example of the present invention, the Programmable voltage output (Programmable Power Supply) ranges from 3.3V to 21V, the setting value is set to 11V, when the voltage on the VBUS line detected by the comparator in the control module 102 is greater than 11V, the control module 102 controls the first switch 10111 between the first turn ratio output terminal 1011 and the Power line 104 to be turned on, and the second switch 10121 between the second turn ratio output terminal 1012 and the Power line 104 to be turned off, so that the transformer outputs the voltage to the common output terminal 101A through the first turn ratio output terminal 1011. When the voltage on the VBUS line detected by the comparator in the control module 102 is less than or equal to 11V, the control module 102 controls the second switch 10121 between the second turn ratio output terminal 1012 and the power line 104 to be turned on, and the first switch 10111 between the first turn ratio output terminal 1011 and the power line 104 to be turned off, so that the transformer outputs the voltage to the common output terminal 101A through the second turn ratio output terminal 1012. According to the process, the full voltage range output of the programmable voltage output is effectively realized.
The above is an exemplary description of the charge control circuit according to the present invention. Illustratively, in one example according to the invention, the charge control circuit further comprises a synchronous rectification module 106. Therefore, power loss is reduced, conversion efficiency is improved, and heating of the charging equipment is reduced.
Example two
The invention also provides a charging device which comprises the charging control circuit in the first embodiment.
Illustratively, the charging device may be used for various electronic devices, such as a mobile phone, a tablet, a notebook, an MP3, an MP4, a mobile power supply, and the like.
Further, the charging device may be a power charger, a power adapter, a mobile power supply, and the like.
In one example according to the present invention, the charging device is applied to a mobile phone power charger.
Illustratively, the charging device according to the invention is a power supply based on the TypeC protocol and the PD protocol.
Illustratively, the charging device according to the invention further comprises a TypeC interface, a power conversion circuit, a microcontroller, a power output circuit, and the like.
The TypeC interface comprises a VBUS pin, a GND pin, a D + pin and a D-pin.
The power conversion circuit is used for converting an input alternating current power supply into a direct current power supply for storage, and comprises circuits such as rectification, filtering and the like.
The power output circuit comprises a charging control circuit according to the invention, and is used for controlling the charging process when an external device needing to be charged is accessed. Specifically, the charging control circuit comprises a power conversion circuit including a transformer, a PD protocol module and a control module.
A transformer including at least a first turn ratio output terminal and a second turn ratio output terminal commonly connected to a common output terminal, the transformer outputting a voltage through the first turn ratio output terminal or outputting a voltage through the second turn ratio output terminal during charging, the transformer having a first turn ratio when the transformer outputs a voltage through the first turn ratio output terminal and a second turn ratio when the transformer outputs a voltage through the second turn ratio output terminal, wherein the first turn ratio is different from the second turn ratio;
the PD protocol module is used for communicating with an external device and receiving the charging requirement of the external device;
and the control module is connected between the power line and the transformer and used for controlling the transformer to output an output voltage matched with the charging requirement to the public output end through the first turn ratio output end or the second turn ratio output end according to the output voltage on the power line.
Specifically, when external equipment is connected to the charging equipment through a TypeC interface, a TypeC protocol module of the TypeC interface detects that the external equipment is connected to the charging equipment, sends detected information connected to the external equipment to a microcontroller, and charges the charging equipment or charges the external equipment by adopting the charging equipment.
Further, the charging control circuit communicates with the external device through a PD protocol module to obtain the charging requirement of the external device. In the invention, when the PD protocol module receives the charging requirement of the external equipment, the charging requirement is fed back to the control module, and the control module controls the transformer to adjust the output voltage so as to meet the charging requirement of the external equipment.
As shown in fig. 2, a transformer having two secondary windings AC and AB is provided in the charge control circuit, and the transformer 101 has a first turn ratio output terminal 1011 and a second turn ratio output terminal 1012 corresponding to the secondary winding AC and the secondary winding AB, respectively, wherein the transformer 101 supplies power to the outside through the secondary winding AC when it outputs a voltage through the first turn ratio output terminal 1011, and supplies power to the outside through the secondary winding AB when the transformer 101 outputs a voltage through the second turn ratio output terminal 1012.
The control module 102 controls the transformer 101 to supply power to the outside through the first turn ratio output terminal 1011 or the second turn ratio output terminal 1012. One of the two secondary windings of the transformer 101 is selected by the control module 102 to supply power to the outside, so that voltage regulation in different ranges can be realized under different requirements of external equipment.
Illustratively, as shown in fig. 2, the first turn ratio output terminal 1011 is connected to the power line 104 through a first switch 10111, and the second turn ratio output terminal 1012 is connected to the power line 104 through a second switch 10121.
Illustratively, when the control module 102 controls the first turn ratio output end 1011 of the transformer 101 to output a voltage, the first switch 10111 between the first turn ratio output end 1011 and the power line 104 is controlled to be opened, and the second switch 10121 between the second turn ratio output end 1012 and the power line 104 is controlled to be closed. When the control module 102 controls the second turn ratio output end 1012 of the transformer 101 to output voltage, the second switch 10121 between the second turn ratio output end 1012 and the power line 104 is controlled to be opened, and the first switch 10111 between the first turn ratio output end 1011 and the power line 104 is controlled to be closed.
The charging device is connected with the external device through a TypeC interface, a power line is set to be a VBUS line, the transformer 101 and the PD protocol module 103 transmit the charging requirement of the external device through the VBUS line therebetween, and the control module 102 samples the voltage on the VBUS line to control the output voltage of the first turn ratio output terminal 1011 of the transformer 101 or the output voltage of the second turn ratio output terminal 1012 of the transformer 101.
Illustratively, the control module 102 includes a comparator. The comparator samples the output voltage on the VBUS line output by the transformer, compares the voltage on the VBUS line with a set value, and when the output voltage is greater than the set value, the control module 102 controls the transformer 101 to output the voltage at a first turn ratio output terminal 1011 having an AC secondary winding with a first turn ratio. When the voltage is less than or equal to the set value, the control module 102 controls the transformer 101 to output the voltage at the second turn ratio output terminal 1012 of the AB secondary winding with the second turn ratio.
Illustratively, according to an example of the present invention, the Programmable voltage output (Programmable Power Supply) ranges from 3.3V to 21V, the set value is set to 11V, and when the voltage on the VBUS line detected by the comparator in the control module 102 is greater than 11V, the control module 102 controls the first switch 10111 between the first turn ratio output terminal 1011 and the Power line 104 to be opened, and the second switch 10121 between the second turn ratio output terminal 1012 and the Power line 104 to be closed, so that the transformer outputs the voltage through the first turn ratio output terminal 1011. When the voltage on the VBUS line detected by the comparator in the control module 102 is less than or equal to 11V, the control module 102 controls the second switch 10121 between the second turn ratio output terminal 1012 and the power line 104 to be opened, and the first switch 10111 between the first turn ratio output terminal 1011 and the power line 104 to be closed, so that the transformer outputs the voltage through the second turn ratio output terminal 1012. According to the process, the full voltage range output of the programmable voltage output is effectively realized.
By adopting the charging control circuit and the charging device provided by the invention, the transformer can output voltages under different turn ratios to meet the charging requirements of external devices only by arranging the secondary windings with different turns, the charging control circuit and the charging device can be realized without complex transformer process, and the programmable voltage output in a full voltage range can be realized without designing a complex flyback controller, so that the design and manufacturing requirements of the charging device are simplified.
The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A charge control circuit, comprising:
a power conversion circuit comprising a transformer including a first turn ratio output, a second turn ratio output, and a common output commonly connected to the first and second turn ratio outputs, the transformer having a first turn ratio when the transformer outputs a voltage across the first turn ratio output and a second turn ratio when the transformer outputs a voltage across the second turn ratio output, wherein the first turn ratio is different than the second turn ratio;
the PD protocol module is connected with the public output end through a power line and used for communicating with external equipment and receiving the charging requirement of the external equipment;
and the control module is connected between the power line and the transformer and used for controlling the transformer to output an output voltage matched with the charging requirement to the public output end through the first turn ratio output end or the second turn ratio output end according to the output voltage on the power line.
2. The charge control circuit of claim 1, wherein the first turn ratio is less than the second turn ratio.
3. The charge control circuit of claim 2, wherein the control module comprises a comparator that compares the output voltage to a set value,
when the output voltage is larger than the set value, the control module controls the transformer to output the output voltage through the first turn ratio output end;
and when the output voltage is greater than the set value, the control module controls the transformer to output the output voltage through the second turn ratio output end.
4. The charge control circuit of claim 1,
the first turn ratio output terminal and the second turn ratio output terminal are connected with the common output terminal through a first switch and a second switch respectively,
the control module controls the transformer to output the output voltage through the first turn ratio output end by controlling the first switch to be opened and the second switch to be closed; and
the control module controls the transformer to output the output voltage through the second turn ratio output end by controlling the second switch to be opened and the first switch to be closed.
5. The charge control circuit of claim 4,
when the output voltage is larger than the set value, the control module controls the first switch to be turned on and the second switch to be turned off.
6. The charge control circuit of claim 4,
when the output voltage is larger than the set value, the control module controls the first switch to be closed and the second switch to be opened.
7. The charging control circuit of claim 4 or 5, wherein the PD protocol module feeds back the charging requirement to the control module when receiving the charging requirement of the external device.
8. The charge control circuit of claim 4, wherein the programmable voltage output of the charge control circuit is in the range of 3.3V to 21V, and the set value is set to 11V.
9. The charge control circuit of claim 1, wherein the PD protocol module communicates with an external device via a type-c interface, and the power line is a VUS line.
10. A charging device characterized by comprising the charge control circuit according to any one of claims 1 to 9.
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| CN202011627781.9A CN112803519A (en) | 2020-12-31 | 2020-12-31 | Charging control circuit and charging equipment |
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| CN202011627781.9A CN112803519A (en) | 2020-12-31 | 2020-12-31 | Charging control circuit and charging equipment |
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| CN111835206A (en) * | 2020-05-23 | 2020-10-27 | 青岛鼎信通讯股份有限公司 | Switching method applied to charging module transformer winding switching device |
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