WO2022037540A1

WO2022037540A1 - Wireless charging apparatus and electronic device

Info

Publication number: WO2022037540A1
Application number: PCT/CN2021/112823
Authority: WO
Inventors: 张军
Original assignee: 维沃移动通信有限公司
Priority date: 2020-08-17
Filing date: 2021-08-16
Publication date: 2022-02-24
Also published as: CN112018901B; CN112018901A

Abstract

A wireless charging apparatus and an electronic device, relating to the technical field of electronics. The wireless charging apparatus comprises: a wireless charging chip (110), wherein the input end of the wireless charging chip (110) is connected to alternating current so as to convert an alternating current voltage into a direct current voltage, and the wireless charging chip (110) is connected to a processor (210) of an electronic device; and a multi-stage step-down module (120), wherein a previous-stage output end in the multi-stage step-down module (120) is connected to a next-stage input end, the first-stage input end of the multi-stage step-down module (120) is connected to the first output end (OUT1) of the wireless charging chip (110), the last-stage output end of the multi-stage step-down module (120) is connected to the charging management module (220) of the electronic device, and the each-stage control end of the multi-stage step-down module (120) is separately connected to the second output end (OUT2) of the wireless charging chip (110).

Description

Wireless charging units and electronic equipment

cross reference

The present invention claims the priority of a Chinese patent application with an application number of 202010827054.0 and an invention title of "wireless charging device and electronic equipment" filed with the Chinese Patent Office on August 17, 2020, the entire contents of which are incorporated herein by reference. middle.

technical field

The present application belongs to the field of electronic technology, and in particular relates to a wireless charging device and electronic equipment.

Background technique

With the development of wireless charging technology, the application of wireless charging function in terminal equipment has become more and more popular, and terminal equipment with wireless charging function is very popular among users. At present, the most important technological development of wireless charging in smart terminal products includes increasing charging power and increasing the degree of freedom of wireless charging, so as to achieve a good user charging experience.

One of the most effective ways to increase the power of wireless charging is to increase the output voltage of the wireless charging chip. In order to increase the output voltage of the wireless charging chip and control the heat generated by charging, as shown in Figure 1, a half-voltage conversion chip is usually added between the output end of the wireless charging chip and the charging IC of the electronic device. The conversion chip is connected to the processor to control the wireless charging process.

In the process of implementing the present application, with the development of higher charging power, a multi-level voltage conversion chip needs to be added to the wireless charging device, which will cause a large number of ports of the processor to be occupied by the wireless charging device.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide a wireless charging device and an electronic device, which can solve the problem that the existing wireless charging device occupies a large number of ports of an electronic device processor.

In a first aspect, an embodiment of the present application provides a wireless charging device, including: a wireless charging chip, an input end of the wireless charging chip is connected to an alternating current to convert the alternating current voltage into a direct current voltage, and the wireless charging chip controls The terminal is connected to the processor of the electronic device; the multi-stage step-down module, the output terminal of the previous stage in the multi-stage step-down module is connected to the input terminal of the subsequent stage, and the first stage of the multi-stage step-down module is The input end of the wireless charging chip is connected to the first output end of the wireless charging chip, the output end of the last stage of the multi-stage step-down module is connected to the charging management module of the electronic device, and each of the multi-stage step-down module The control terminals of the stages are respectively connected to the second output terminals of the wireless charging chip.

In a second aspect, an embodiment of the present application provides an electronic device, including: a processor, a battery module, a charging management module, and the wireless charging device described in the first aspect.

In the embodiment of the present application, the input end of the first-stage step-down module is connected to the wireless The first output terminal of the charging chip and the output terminal of the last-stage step-down module are connected to the charging management module of the electronic device, so that the multi-level adjustment of the output voltage of the wireless charging chip can be realized through the multi-stage step-down module, which plays a role in Adjust the effect of wireless charging power. At the same time, by connecting the wireless charging chip to the processor of the electronic device, and connecting the control terminals of the wireless charging chips at all levels to the second output terminal of the wireless charging chip, the control signal output by the processor can be transmitted through the wireless charging chip. It is transparently transmitted to the step-down modules at all levels to realize the control of the step-down modules at all levels. Compared with the way of connecting the step-down modules at all levels with the processor in the existing charging device, it can reduce the amount of electronic equipment processing occupied. the number of ports on the device.

Description of drawings

FIG. 1 is a schematic structural diagram of an existing wireless charging device;

FIG. 2 is a schematic structural diagram of a wireless charging device provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of an existing wireless charging chip.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work 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 are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and distinguish between "first", "second", etc. The objects are usually of one type, and the number of objects is not limited. For example, the first object may be one or more than one. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the associated objects are in an "or" relationship.

The technical solutions provided by the embodiments of the present application will be described in detail below through specific embodiments and application scenarios with reference to the accompanying drawings.

Referring to FIG. 2 , an embodiment of the present application provides a wireless charging device. The wireless charging device includes: a wireless charging chip 110 and a multi-level step-down module 120 . The multi-stage step-down module 120 shown in FIG. 2 includes a first-stage step-down module to an N-th step-down module, and the embodiment of the present application does not limit the number of step-down modules 120 .

The input end of the wireless charging chip 110 is connected to an alternating current to convert the alternating voltage into a direct current voltage; the wireless charging chip 110 is connected to the processor 210 of the electronic device. Specifically, as shown in FIG. 2 , the control terminal CTRL of the wireless charging chip 110 is connected to the processor 210 of the electronic device.

In the multi-stage step-down module 120 , the output terminal of the previous-stage step-down module 120 is connected to the input terminal of the subsequent-stage step-down module 120 , and the input terminal of the first-stage step-down module is connected to the first output of the wireless charging chip 110 . terminal OUT1, the output terminal of the last stage step-down module (the N-th stage step-down module shown in FIG. 2) is connected to the charging management module 220 of the electronic device, and the control terminal of each level step-down module (as shown in FIG. 2) The control terminals CTRL_1 to CTRL_N) are respectively connected to the second output terminals OUT2 of the wireless charging chip 110 .

The electronic device in the embodiments of the present application is an electronic device that can be charged through wireless charging technology, and the electronic device may include, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a handheld computer, a vehicle-mounted electronic device, and a wearable device. , ultra-mobile personal computer (ultra-mobile personal computer, UMPC), netbook or personal digital assistant (personal digital assistant, PDA) and so on. The electronic device can be wirelessly charged through the wireless charging device.

The charging management module 220 of the electronic device is a module having functions such as transforming, distributing, and detecting the input electrical energy.

Specifically, the wireless charging chip 110 converts the AC voltage connected to its input terminal into a DC voltage and outputs it, and then the voltage is stepped down by the step-down modules 120 at all levels connected in series, and then output to the charging management module 220 . 220 is processed and output to the battery module 230 of the electronic device to charge the battery module 230 .

In the process of charging the battery module 230 , the processor 210 of the electronic device can control the step-down modules 120 at all levels, for example, control the step-down modules 120 at all levels to turn on or off, and adjust the working mode of the step-down modules 120 at all levels etc. Specifically, the processor 210 can output a control signal for the step-down modules 120 at all levels to the wireless charging chip 110 , and the wireless charging chip 110 transmits the control signal to the step-down modules 120 at all levels respectively, and/or the wireless charging The chip 110 processes the control signal and transmits it to the step-down modules 120 of all levels respectively, thereby realizing the control of the step-down modules 120 of all levels.

It should be noted that the first output terminal OUT1 of the wireless charging chip 110 refers to a port for outputting DC voltage, and the second output terminal OUT2 of the wireless charging chip 110 refers to a port for outputting control signals, which can be used in practical applications. Any I/O port of the wireless charging chip 110 is used as the first output terminal OUT1 and the second output terminal OUT2.

It can be understood that, in the embodiment of the present application, by using a multi-stage step-down module and connecting the output end of the previous step-down module to the input end of the next step-down module, the input end of the first-stage step-down module is connected. to the first output end of the wireless charging chip and the output end of the last stage of the step-down module is connected to the charging management module of the electronic device, so that the multi-stage adjustment of the output voltage of the wireless charging chip can be realized through the multi-stage step-down module, Play the role of adjusting the wireless charging power. At the same time, by connecting the control end of the wireless charging chip to the processor of the electronic device, and connecting the control end of the wireless charging chip at all levels to the second output end of the wireless charging chip, the processor can be output by the wireless charging chip. The control signal is transparently transmitted to the step-down modules at all levels to realize the control of the step-down modules at all levels, and compared with the existing charging device in which the step-down modules at all levels are respectively connected to the processor, the occupied space can be reduced. The number of ports in the electronics processor.

Optionally, in the embodiment of the present application, the wireless charging chip 110 may be a wireless charging and receiving chip, which can perform wireless communication with the wireless transmitting end, and adjust the wireless charging power based on the communication information with the wireless transmitting end.

Optionally, in this embodiment of the present application, the number of step-down modules 120 may be based on the output voltage of the wireless charging chip 110 , the ratio between the output voltage of the step-down module 120 and its input voltage, and the required input to the charging management module 220 . The voltage is determined, which is not limited in this embodiment of the present application.

For example, if the output voltage of the wireless charging chip 110 is 80V, the ratio of the output voltage of the step-down module 120 to its input voltage is 1/2, and the required input voltage to the charging management module 220 is 20V, a two-stage step-down can be used The module, that is, the output voltage of the wireless charging chip 110 is reduced to 40V by the first-stage step-down module 120 and then input to the second-stage step-down module 120, and then reduced to 20V by the second-stage step-down module 120 and then input to the charging management module 220.

For another example, if the output voltage of the wireless charging chip 110 is 80V, the ratio of the output voltage of the step-down module 120 to its input voltage is 1/2, and the required input voltage to the wireless charging management module 220 is 10V, three levels can be used. The step-down module, that is, the voltage output by the wireless charging chip 110 is reduced to 40V by the first-stage step-down module 120, and then input to the second-stage step-down module 120, and then reduced to 20V by the second-stage step-down module 120, and then input to the second-stage step-down module 120. The third-stage step-down module 120 is finally reduced to 10V by the third-stage step-down module 120 and then input to the charging management module 220 .

For another example, if the output voltage of the wireless charging chip 110 is 80V, the ratio of the output voltage of the step-down module 120 to its input voltage is 1/2, and the required input voltage to the wireless charging management module 220 is 5V, four levels can be used. The step-down module, that is, the voltage output by the wireless charging chip 110 is reduced to 40V through the first-stage step-down module 120 , to 20V after the second-stage step-down module 120 , and then to 10V after the third-stage step-down module 120 , and finally reduced to 5V by the fourth-stage step-down module 120 and then input to the charging management module 220 .

Optionally, in the embodiment of the present application, the step-down modules 120 at all levels may include a half-voltage conversion chip, and the half-voltage conversion chip may convert the input voltage VIN to 1/2VIN output, that is, to achieve Vout=1/2VIN. By using a half-voltage conversion chip in the step-down module 120 , the charging temperature can be controlled under the condition of increasing the output voltage of the wireless charging chip 110 , so as to avoid serious heating problems of the electronic device.

Optionally, in the embodiment of the present application, the step-down modules at all levels can be separately implemented as multiple functional modules; or, the step-down modules at all levels can also be combined with each other and integrated on one chip to reduce the need for wireless charging devices. Occupation of interior space.

In this embodiment of the present application, the wireless charging chip 110 includes a logic processing circuit, a processor, and the like in addition to voltage processing elements (such as voltage regulators, rectifiers, etc.). Since both the logic processing circuit and the processor consume power when working, the logic processing circuit and the processor need to be powered. The same is true for the step-down modules 120 at all levels.

In the existing wireless charging device, for the wireless charging chip 110 and the step-down module 120, the input voltage is usually used to power the logic processing circuit and the processor. For example, in the wireless charging chip shown in FIG. 3, the input voltage AC_IN is used. The voltage Vrect obtained after being rectified by the rectifier, on the one hand, is regulated by the Main Low Dropout Regulator (MLDO) and then the output voltage Vout, on the other hand, after being regulated by the Low Dropout Regulator (LDO), it is Logic circuits and M0 processor are powered. However, since the internal loss (such as the loss generated on the LDO) is proportional to its input voltage, if the output voltage of the wireless charging chip 110 is to be increased, the input voltage of the wireless charging chip 110 needs to be increased, which will cause the internal The loss increases, which in turn leads to an increase in the temperature rise of the wireless charging chip 110 . Similarly, when the output voltage of the wireless charging chip 110 is relatively large, the input voltages of the first-stage buck modules in the multi-stage buck modules are usually relatively large, so that the internal losses of these buck modules increase, which in turn leads to The temperature rise of these buck modules increases.

In order to solve the above technical problem, in an optional implementation manner, the power supply terminal of the last stage of the step-down module 120 is connected to the power supply terminals of the other levels of step-down modules 120 and the power supply terminal of the wireless charging chip 110 . The step-down module 120 and the wireless charging chip 110 both have logic processing circuits and processors inside, and the power supply terminal of the step-down module 120 refers to the port used to supply power to the logic processing circuit and the processor inside the step-down module 120. The wireless charging chip The power supply terminal of 110 refers to a port for supplying power to its internal logic processing circuit and processor.

Specifically, the voltage input to the power supply terminal of the last stage of the step-down module 120 will also be transmitted to the power supply terminals of the other levels of the step-down module 120 and the power supply terminal of the wireless charging chip 110, and after passing through the internal voltage regulator, each The logic processing circuit and the processor inside each of the step-down step-down module 120 and the wireless charging chip 110 are supplied with power. Since the input voltage of the voltage regulator of the last stage of the step-down module 120 is relatively small, using the input voltage to supply power to the logic processing circuits and processors inside the other stages of the step-down module 120 and the wireless charging chip 110 can reduce these problems. The internal loss of the step-down module and the wireless charging chip, thereby reducing the temperature rise of these step-down modules and the wireless charging chip.

It should be noted that, in this embodiment, the input voltage of the power supply terminal of the last stage of the step-down module 120 may adopt the input voltage of the step-down module 120 of this stage (that is, output from the previous stage of step-down module to the last stage of the step-down module The voltage of the input terminal), the output voltage (ie the output terminal voltage) of the step-down module 120 of this stage can also be used. Specifically, since the conversion efficiency between the input voltage of the buck module 120 - the output voltage - the output voltage of the regulator is higher than the conversion efficiency between the input voltage and the output voltage of the regulator, in the last stage of the buck module When the input terminal of 120 is just powered on, the input voltage of the step-down module 120 can be input to the power supply terminals of the step-down module 120 at each stage (for example, the power supply terminals PWR_1 to PWR_N shown in FIG. 2 ) and the wireless charging chip. The power supply terminal of 110 (the power supply terminal PWR shown in FIG. 2 ); after the last stage of the step-down module 120 enters a stable working state, the output voltage of the step-down module 120 can be input to the output voltage of the step-down module 120 of each stage. The power supply terminal and the power supply terminal of the wireless charging chip 110 .

In another optional implementation manner, a power supply module may be added to the wireless charging device, and the power supply module supplies power to the logic processing circuits and processors inside each of the step-down modules 120 at all levels and the wireless charging chip 110 . Specifically, the wireless charging device in the embodiment of the present application further includes a power supply module 130 , power supply terminals of the step-down modules 120 at all levels (power supply terminals PWR_1 to PWR_N shown in FIG. 2 ) and power supply terminals of the wireless charging chip 110 (eg The power supply terminals (PWR) shown in FIG. 2 are respectively connected to the power supply modules 130 . The power module 130 may adopt a power module with a lower output voltage. For example, the output voltage of the power module 130 may be 5V, 3.3V, 1.8V, and so on.

In this embodiment, the voltages output by the power modules 130 are respectively input to the power supply terminals of the step-down modules 120 at all levels and the power supply terminals of the wireless charging chip 110 , and the voltages output by the power-supply modules 120 at all levels and the wireless charging terminals after passing through the internal voltage stabilizer The logic processing circuits and processors inside the chips 110 are powered. Since the output voltage of the power supply module 130 is relatively small, using this voltage to supply power to the logic processing circuits and processors inside the step-down modules 120 and the wireless charging chip 110 at all levels can reduce the internal voltage of the step-down modules and the wireless charging chips at all levels. loss, thereby reducing the temperature rise of the step-down modules and wireless charging chips at all levels.

Considering that there is a situation of performing interrupt control on the step-down modules 120 at all levels in practical applications, in order to avoid the occupation of the ports of the processor 210 by the interrupt signal terminals of the step-down modules 120 at all levels, optionally, in this embodiment of the present application, The interruption signal terminals of the step-down modules 120 at all levels are respectively connected to the same third output terminal (not shown in the figure) of the wireless charging chip 110 , or the interruption signal terminals of the step-down modules 120 at all levels are respectively connected to the wireless charging chip A different third output of 110 (not shown).

Specifically, the processor 210 can output the interrupt control signal to the multi-stage buck module to the control terminal of the wireless charging chip 110, and the wireless charging chip 110 outputs the interrupt control signal to the corresponding buck through its third output terminal. The module 120 is used to realize the interrupt control of the multi-stage step-down module.

It can be understood that, compared with the latter connection manner, the former connection manner can reduce the number of ports of the wireless charging chip 110 that need to be occupied.

It should be noted that the third output terminal of the wireless charging chip 110 refers to a port for outputting an interrupt control signal, and the third output terminal may use any I/O port of the wireless charging chip 110 .

An embodiment of the present application further provides an electronic device, the electronic device includes a processor 210 , a charging management module 220 , a battery module 230 , and the wireless charging apparatus described in any of the above embodiments of the present application.

The processor 210 is respectively connected to the control terminal of the wireless charging chip 110 and the battery module 230 in the wireless charging device. The processor 210 may send a control signal for the multi-stage step-down module to the wireless charging chip 110, so as to transmit the target control signal to the multi-stage step-down module through the wireless charging chip 110, and the target control signal includes a control signal and/or a pair of control signals. The signal obtained after processing.

Optionally, in this embodiment of the present application, the charging management module 220 is a module having functions such as transforming, distributing, and detecting the input electrical energy, and may specifically include one or a combination of the following chips: a step-down chip, Voltage regulator chip and half voltage conversion chip. The half-voltage conversion chip may be a charge pump, which is a DC-DC converter that uses a capacitor as an energy storage element to boost the input voltage. Using a charge pump as a half-voltage conversion chip has simple implementation and high conversion efficiency, and can improve wireless charging efficiency.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course hardware can also be used, but in many cases the former is better implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence or in a part that contributes to the prior art, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of this application, without departing from the scope of protection of the purpose of this application and the claims, many forms can be made, which all fall within the protection of this application.

Claims

A wireless charging device, comprising:

a wireless charging chip, the input end of the wireless charging chip is connected to alternating current to convert the alternating voltage into a direct current voltage, and the wireless charging chip is connected to the processor of the electronic device;

A multi-stage step-down module, in which the output end of the previous stage is connected to the input end of the latter stage, and the input end of the first stage of the multi-stage step-down module is connected to the wireless charging The first output terminal of the chip, the output terminal of the last stage of the multi-stage step-down module is connected to the charging management module of the electronic device, and the control terminals of each stage of the multi-stage step-down module are respectively connected to the The second output end of the wireless charging chip.
The wireless charging device according to claim 1, wherein the power supply terminal of the last stage of the multi-stage step-down module is connected to the power supply terminals of other stages and the power supply terminal of the wireless charging chip.
The wireless charging device according to claim 1, wherein the wireless charging device further comprises a power supply module, and the power supply terminals of each stage in the multi-stage step-down module and the power supply terminals of the wireless charging chip are respectively connected to the power supply terminals of the wireless charging chip. power module.
The wireless charging device according to claim 1, wherein the interrupt signal terminals of each stage in the multi-stage step-down module are respectively connected to the same third output terminal of the wireless charging chip, or, the multi-stage step-down module The interrupt signal terminals of the voltage module are respectively connected to different third output terminals of the wireless charging chip.
The wireless charging device according to claim 1, wherein the multi-level step-down module is integrated on one chip.
The wireless charging device according to any one of claims 1 to 5, wherein the multi-level step-down module comprises a multi-level half-voltage conversion chip.
The wireless charging device according to any one of claims 1 to 5, wherein the wireless charging chip is a wireless charging receiving chip.
An electronic device includes: a processor, a battery module, a charging management module, and the wireless charging device according to any one of claims 1 to 7.
The electronic device according to claim 8, wherein the charge management module comprises a combination of one or more of the following chips: a step-down chip, a voltage regulator chip, and a half-voltage conversion chip.
The electronic device according to claim 8, wherein the processor sends a control signal for the multi-stage step-down module to the wireless charging chip, so as to transmit a target control signal to the wireless charging chip through the wireless charging chip In the multi-stage step-down module, the target control signal includes the control signal and/or a signal obtained by processing the control signal.