CN219181229U - Charging circuit, charge pump chip and terminal equipment - Google Patents
Charging circuit, charge pump chip and terminal equipment Download PDFInfo
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- CN219181229U CN219181229U CN202320135982.XU CN202320135982U CN219181229U CN 219181229 U CN219181229 U CN 219181229U CN 202320135982 U CN202320135982 U CN 202320135982U CN 219181229 U CN219181229 U CN 219181229U
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Abstract
The disclosure provides a charging circuit, charge pump chip and terminal equipment, charging circuit includes parallelly connected first electric capacity branch road and the second electric capacity branch road that sets up, and first electric capacity branch road is including electric capacity C2 and electric capacity C3 that the series arrangement, and the second electric capacity branch road is including electric capacity C5 and electric capacity C6 that the series arrangement. When the charging circuit in the present disclosure is adopted for charging, quick charging can be realized only by selecting a capacitor with a lower withstand voltage value, and because the withstand voltage value of the selected capacitor is lower, the size of the capacitor is smaller, the price of the capacitor is lower, not only hardware cost can be effectively reduced, but also occupation of the capacitor to a circuit board can be reduced, and further the size of the circuit board is reduced, and further the cost is reduced.
Description
Technical Field
The disclosure relates to the field of electronic technology, and in particular relates to a charging circuit, a charge pump chip and terminal equipment.
Background
The charging efficiency of the mobile phone is an important index for the user to select the mobile phone, and the charging circuit of the mobile phone is one of the most critical circuits in the mobile phone.
At present, a mobile phone fast charging technology is rapidly developed, a charge pump chip is a chip which is necessary to be used in the fast charging field, a charge pump circuit needs to use a large amount of capacitors, and the requirement on withstand voltage values of the capacitors is high, so that hardware cost is increased.
Disclosure of Invention
In order to overcome the problems in the related art, the present disclosure provides a charging circuit, a charge pump chip and a terminal device.
According to a first aspect of embodiments of the present disclosure, there is provided a charging circuit, including a first capacitor branch and a second capacitor branch arranged in parallel, the first capacitor branch including a capacitor C2 and a capacitor C3 arranged in series, the second capacitor branch including a capacitor C5 and a capacitor C6 arranged in series;
the capacitor C2 is connected to an input end through a switch Q21, the capacitor C3 is connected to an output end through a switch Q62, the capacitor C5 is connected to the input end through a switch Q22, and the capacitor C6 is connected to the output end through a switch Q61;
a switch Q32 is arranged between the capacitor C2 and the capacitor C6, and a switch Q31 is arranged between the capacitor C5 and the capacitor C3;
the charging circuit further comprises a first switch branch and a second switch branch which are arranged in parallel, wherein the first switch branch comprises a switch Q41 and a switch Q52 which are connected in series, the second switch branch comprises a switch Q42 and a switch Q51 which are connected in series, the switch Q41 and the switch Q42 are grounded, the switch Q52 and the switch Q51 are respectively connected with the output end, a capacitor C3 is connected with the switch Q51 in parallel, a capacitor C2 is connected with the switch Q42 in parallel, a capacitor C5 is connected with the switch Q41 in parallel, and the switch Q52 is connected with a capacitor C6 in parallel;
the voltage value output to the output end by the charging circuit is U, the precharge voltage of the capacitor C2 and the capacitor C5 is 2U, and the precharge voltage of the capacitor C3 and the capacitor C6 is U.
Optionally, the positive terminal of the input terminal is connected to the switch Q21 and the switch Q22, respectively, the negative terminal of the input terminal is grounded, and the output voltage of the input terminal is 3U.
Optionally, the charging circuit includes a first charging path combination and a second charging path combination that alternately operate, the first charging path combination including a first charging path, a second charging path, and a third charging path in parallel;
the first charging path comprises the input end, the switch Q21, the capacitor C2, the switch Q51 and the output end which are sequentially connected;
the voltage source of the second charging path is the capacitor C5, one end of the capacitor C5 is connected to the output end through the switch Q31, the capacitor C3 and the switch Q51 in sequence, and the other end of the capacitor C5 is grounded through the switch Q41;
the voltage source of the third charging path is the capacitor C6, one end of the capacitor C6 is connected with the output end through the switch Q61, and the other end of the capacitor C6 is grounded through the switch Q41;
the second charging path combination comprises a fourth charging path, a fifth charging path and a sixth charging path which are parallel;
the fourth charging path comprises the input end, the switch Q22, the capacitor C5, the switch Q52 and the output end which are sequentially connected;
the voltage source of the fifth charging path is the capacitor C2, one end of the capacitor C2 is connected to the output end through the switch Q32, the capacitor C6 and the switch Q52 in sequence, and the other end of the capacitor C2 is grounded through the switch Q42;
the voltage source of the sixth charging path is the capacitor C3, one end of the capacitor C3 is connected to the output end through the switch Q62, and the other end of the capacitor C3 is grounded through the switch Q42.
Optionally, the charging circuit includes a third capacitor branch and a fourth capacitor branch, where the third capacitor branch includes a switch Q11 and a capacitor C1 connected in series, the third capacitor branch is disposed between the switches Q21, the fourth capacitor branch includes a switch Q12 and a capacitor C4 connected in series, and the fourth capacitor branch is disposed between the input end and the switch Q22;
the charging circuit comprises a first grounding branch and a second grounding branch, wherein the first grounding branch is provided with a switch Q71, one end of the switch Q71 is grounded, the other end of the switch Q71 is connected with the capacitor C4, the second grounding branch is provided with a switch Q72, one end of the switch Q72 is grounded, and the other end of the switch Q72 is connected with the capacitor C1;
the charging circuit further comprises a first output branch and a second output branch, wherein the first output branch is provided with a switch Q81, one end of the switch Q81 is respectively connected with the switch Q1 and the capacitor C4, the other end of the switch Q81 is connected with the output end, the second output branch is provided with a switch Q82, one end of the switch Q82 is respectively connected with the switch Q11 and the capacitor C1, and the other end of the switch Q82 is connected with the output end;
the precharge voltage of the capacitor C1 and the capacitor C4 is U.
Optionally, the positive terminal of the input terminal is connected to the switch Q11 and the switch Q12, the negative terminal of the input terminal is grounded, and the output voltage of the input terminal is 4U.
Optionally, the charging circuit includes a first charging path combination and a second charging path combination that alternately operate, the first charging path combination including a first charging path, a second charging path, a third charging path, and a seventh charging path in parallel;
the first charging path comprises the input end, the switch Q21, the capacitor C2, the switch Q51 and the output end which are sequentially connected;
the voltage source of the second charging path is the capacitor C5, one end of the capacitor C5 is connected to the output end through the switch Q31, the capacitor C3 and the switch Q51 in sequence, and the other end of the capacitor C5 is grounded through the switch Q41;
the voltage source of the third charging path is the capacitor C6, one end of the capacitor C6 is connected with the output end through the switch Q61, and the other end of the capacitor C6 is grounded through the Q41;
the voltage source of the seventh charging path is the capacitor C4, one end of the capacitor C4 is connected to the output end through the switch Q81 in turn, and the other end of the capacitor C4 is grounded through the switch Q71;
the second charging path combination comprises a fourth charging path, a fifth charging path, a sixth charging path and an eighth charging path which are parallel;
the fourth charging path comprises the input end, the switch Q22, the capacitor C5, the switch Q52 and the output end which are sequentially connected;
the voltage source of the fifth charging path is the capacitor C2, one end of the capacitor C2 is connected to the output end through the switch Q32, the capacitor C6 and the switch Q52 in sequence, and the other end of the capacitor C2 is grounded through the switch Q42;
the voltage source of the sixth charging path is the capacitor C3, one end of the capacitor C3 is connected to the output end through the switch Q62, and the other end of the capacitor C3 is grounded through the Q42;
the voltage source of the eighth charging path is a capacitor C1, one end of the capacitor C1 is connected to the output end through the switch Q82, and the other end of the capacitor C1 is grounded through the switch Q72.
Optionally, any one of the switches Q11, Q12, Q21, Q22, Q31, Q32, Q41, Q42, Q51, Q52, Q61, Q62, Q71, Q72, Q81, and Q82 is a transistor or a field effect transistor.
Optionally, the charging circuit includes a control module, and the control module is connected with the control end of the triode or the field effect transistor.
According to a second aspect of the present disclosure, there is provided a charge pump chip having integrated thereon a charging circuit of the first aspect.
According to a third aspect of the present disclosure, there is provided a terminal device provided with the charging circuit as described in the first aspect.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: when the charging circuit in the present disclosure is adopted for charging, quick charging can be realized only by selecting a capacitor with a lower withstand voltage value, and because the withstand voltage value of the selected capacitor is lower, the size of the capacitor is smaller, the price of the capacitor is lower, not only hardware cost can be effectively reduced, but also occupation of the capacitor to a circuit board can be reduced, and further the size of the circuit board is reduced, and further the cost is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic diagram of a charging circuit shown according to an exemplary embodiment.
Fig. 2 is a schematic diagram of a charging circuit shown according to an example embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
The charging efficiency of the mobile phone is an important index for the user to select the mobile phone, and the charging circuit of the mobile phone is one of the most critical circuits in the mobile phone.
At present, a mobile phone fast charging technology is rapidly developed, a charge pump chip is a chip which is necessary to be used in the fast charging field, a charge pump circuit needs to use a large amount of capacitors, and the requirement on withstand voltage values of the capacitors is high, so that hardware cost is increased.
In order to solve the above-mentioned problems, the present disclosure provides a charging circuit, a charge pump chip and a terminal device, the charging circuit includes a first capacitor branch and a second capacitor branch which are arranged in parallel, the first capacitor branch includes a capacitor C2 and a capacitor C3 which are arranged in series, the second capacitor branch includes a capacitor C5 and a capacitor C6 which are arranged in series, the capacitor C2 is connected to an input terminal through a switch Q21, the capacitor C3 is connected to an output terminal through a switch Q62, the capacitor C5 is connected to the input terminal through a switch Q22, the capacitor C6 is connected to the output terminal through a switch Q61, a switch Q32 is arranged between the capacitor C2 and the capacitor C6, a switch Q31 is arranged between the capacitor C5 and the capacitor C3, the charging circuit further comprises a first switch branch and a second switch branch which are arranged in parallel, the first switch branch comprises a switch Q41 and a switch Q52 which are connected in series, the second switch branch comprises a switch Q42 and a switch Q51 which are connected in series, the switch Q41 and the switch Q42 are grounded, the switch Q52 and the switch Q51 are respectively connected with the output end, a capacitor C3 is connected with the switch Q51 in parallel, a capacitor C2 is connected with the switch Q42 in parallel, a capacitor C5 is connected with the switch Q41 in parallel, and the Q52 is connected with a capacitor C6 in parallel, wherein the voltage value output by the charging circuit to the output end is U, the precharge voltage of the capacitor C2 and the capacitor C5 is 2U, and the precharge voltage of the capacitor C3 and the capacitor C6 is U. When the charging circuit in the present disclosure is adopted for charging, quick charging can be realized only by selecting a capacitor with a lower withstand voltage value, and because the withstand voltage value of the selected capacitor is lower, the size of the capacitor is smaller, the price of the capacitor is lower, not only hardware cost can be effectively reduced, but also occupation of the capacitor to a circuit board can be reduced, and further the size of the circuit board is reduced, and further the cost is reduced.
According to an exemplary embodiment of the present disclosure, as shown in fig. 1 and 2, the embodiment of the present disclosure provides a charging circuit for powering a battery 300 in a terminal device, such as a smart phone, a notebook computer, a tablet computer, a wearable smart device, etc. The charging circuit can realize a rapid charging function to improve the charging efficiency of the battery 300 and reduce the charging time period.
In this embodiment, as shown in fig. 1, the charging circuit is configured to convert the voltage at the input terminal 100 so that the voltage at the output terminal 200 meets the charging requirement of the battery 300. The charging circuit according to the present embodiment can be applied to, for example, 3:1 a charge pump. The input 100 may be, for example, a power supply module, i.e., a charger.
As shown in fig. 1, the charging circuit includes a first capacitor branch and a second capacitor branch, which are arranged in parallel, the first capacitor branch includes a capacitor C2 and a capacitor C3 arranged in series, and the second capacitor branch includes a capacitor C5 and a capacitor C6 arranged in series. Since the voltage value provided by the input terminal 100 is 3U and the voltage value that the output terminal 200 can receive is U, in order to avoid high voltage damage to the battery 300 connected to the output terminal 200 and to improve the charging efficiency, the capacitor C2, the capacitor C3, the capacitor C5 and the capacitor C6 need to be precharged, the voltages of the capacitor C2 and the capacitor C5 are charged to 2U, and the voltages of the capacitor C3 and the capacitor C6 are charged to U, so as to ensure that the voltage value of the output terminal 200 of each charging path is U after the switch is adjusted in the open/close state. In the first capacitive branch and the second capacitive branch, the capacitor C2 and the capacitor C5 correspond to each other and act identically, and the capacitor C3 and the capacitor C6 correspond to each other and act identically.
Referring to fig. 1, a capacitor C2 is connected to the input terminal 100 through a switch Q21, and a capacitor C3 is connected to the output terminal 200 through a switch Q62. With continued reference to fig. 1, capacitor C5 is connected to input 100 through switch Q22 and capacitor C6 is connected to output 200 through switch Q61. A switch Q32 is disposed between the capacitor C2 and the capacitor C6, and a switch Q31 is disposed between the capacitor C5 and the capacitor C3.
By controlling the on-off state of the switch Q21, the switch Q62, the switch Q22, and the switch Q61, it is possible to control in which capacitor the electric energy entering the charging circuit through the input terminal 100 is pre-stored, and then the stored electric energy is transferred to the output terminal 200 by the capacitor, so that the battery 300 can be charged. For example, when the switch Q21 is on, the input terminal 100 can precharge the capacitor C2.
Referring to fig. 1, the charging circuit further includes a first switching branch and a second switching branch which are arranged in parallel, the first switching branch includes a switch Q41 and a switch Q52 which are connected in series, the second switching branch includes a switch Q42 and a switch Q51 which are connected in series, the switch Q41 and the switch Q42 are grounded, the switch Q52 and the switch Q51 are respectively connected with the output terminal 200, a capacitor C3 is connected in parallel with the switch Q51, a capacitor C2 is connected in parallel with the switch Q42, a capacitor C5 is connected in parallel with the switch Q41, and the capacitor Q52 is connected in parallel with the capacitor C6.
By controlling the first switching leg and the second switching leg, the communication path between the capacitor and the output terminal 200 can be controlled, and the capacitor is controlled to be grounded, so that the capacitor is discharged, and thus, the electric energy pre-stored in the capacitor is transmitted to the output terminal 200 and then transmitted to the battery 300 from the output terminal 200.
In one example, as shown in fig. 1, when the capacitor C6 is fully charged, one end of the capacitor C6 may be connected to the output terminal 200 by opening the switch Q61, and the other end of the capacitor C6 may be grounded by opening the switch Q41, thereby forming a loop, enabling the capacitor C6 to be discharged into the output terminal 200 to charge the battery 300.
In this disclosed embodiment, when adopting the charging circuit in this disclosure to charge, only need select the low electric capacity of withstand voltage value just can realize quick charge, because the withstand voltage value of electric capacity of selecting is lower, so the size of electric capacity is less and the price of electric capacity is lower, not only can effectively reduce hardware cost, can also reduce the occupation of electric capacity to the circuit board, and then reduce the size of circuit board, further reduce cost.
In one exemplary embodiment, the charging circuit includes a first capacitive leg and a second capacitive leg arranged in parallel, and a first switching leg and a second switching leg arranged in parallel.
In this embodiment, as shown in fig. 1, the positive terminal (+) of the input terminal 100 is connected to the switch Q21 and the switch Q22, respectively, and the negative terminal (-) of the input terminal 100 is grounded, and the charging circuit provided in this embodiment can convert the input voltage of 3U at the input terminal 100 into the output voltage of U at the output terminal 200, that is, the voltage value at the input terminal 100 is three times the voltage value at the output terminal 200, so as to satisfy the charging voltage U of the battery 300.
In some embodiments, as shown in fig. 1, the charging circuit includes a first charging path combination and a second charging path combination that alternately operate, the first charging path combination including a first charging path, a second charging path, and a third charging path in parallel, the second charging path including a fourth charging path, a fifth charging path, and a sixth charging path in parallel.
Referring to fig. 1, the control switch Q21 and the switch Q51 are turned on, and the first charging path includes an input terminal 100, the switch Q21, a capacitor C2, the switch Q51, and an output terminal 200, which are sequentially connected. That is, the charging current can be transmitted to the battery 300 through the input terminal 100, the switch Q21, the capacitor C2, the switch Q51, and the output terminal 200 in this order. In the first charging path, the voltage at the input terminal 100 is 3U, the precharge voltage in the capacitor C2 is 2U, and the capacitor C2 performs a step-down function, so that the voltage at the output terminal 200 is ensured to be U, and the battery 300 is not damaged. It should be noted that, when the charging circuit is switched from the first charging path combination to the second charging path combination, the fourth charging path includes the input terminal 100, the switch Q22, the capacitor C5, the switch Q52 and the output terminal 200 connected in sequence, and the implementation principle of the fourth charging path is the same as that of the first charging path, which will not be described in detail herein.
Referring to fig. 1, the switch Q31 and the switch Q51 are controlled to be turned on, the voltage source of the second charging path is a capacitor C5, one end of the capacitor C5 is sequentially transmitted to the battery 300 through the switch Q31, the capacitor C3, the switch Q51 and the output terminal 200, the other end of the capacitor C5 is grounded through the switch Q41, so that the electric energy pre-stored in the capacitor C5 can be transmitted to the output terminal 200, the pre-charge voltage of the capacitor C5 is 2U, the pre-charge voltage in the capacitor C3 is U, and after the voltage output by the capacitor C5 as the voltage source is reduced through the capacitor C3, the voltage at the output terminal 200 is ensured to be U. It can be understood that the fifth charging path corresponds to the second charging path, the voltage source of the fifth charging path is a capacitor C2, when the charging circuit is switched from the first charging path combination to the second charging path combination, one end of the capacitor C2 is connected to the output end 200 sequentially through the switch Q32, the capacitor C6 and the switch Q52, the other end of the capacitor C2 is grounded through the switch Q42, and the implementation principle of the fifth charging path is the same as that of the second charging path, which will not be described in detail herein.
Referring to fig. 1, the voltage source of the third charging path is a capacitor C6, one end of the capacitor C6 is connected to the output terminal 200 through a switch Q61, and the other end of the capacitor C6 is grounded through a switch Q41, so that the electric energy pre-stored in the capacitor C6 can be transmitted to the output terminal 200. In the third charging path, since the precharge voltage in the capacitor C6 is U, the capacitor C6 is used as a voltage source, the switch Q41 is turned on to achieve grounding, and the switch Q61 is turned on to connect the capacitor C6 with the output terminal 200, so as to form a power supply loop, and the precharge voltage U in the capacitor C6 can be directly transmitted to the output terminal 200. It is understood that the sixth charging path corresponds to the third charging path, the voltage source of the sixth charging path is a capacitor C3, one end of the capacitor C3 is connected to the output end 200 through the switch Q62, the other end of the capacitor C3 is grounded through the switch Q42, and the implementation principle of the sixth charging path is the same as that of the third charging path, which is not described in detail herein.
In summary, when the control switch Q21, the switch Q31, the switch Q41, the switch Q51, and the switch Q61 are turned on and the control switch Q22, the switch Q32, the switch Q42, the switch Q52, and the switch Q62 are turned off, the first charging path is operated in combination, and the first charging path, the second charging path, and the third charging path charge the battery 300. When the control switch Q22, the switch Q32, the switch Q42, the switch Q52, and the switch Q62 are turned on, and the control switch Q21, the switch Q31, the switch Q41, the switch Q51, and the switch Q61 are turned off, the fourth charging path, the fifth charging path, and the sixth charging path charge the battery 300. The first charging path combination and the second charging path combination alternately work, and three charging paths simultaneously supply power to the battery 300 in each charging path combination, so that quick charging is realized, and charging efficiency is improved.
In one exemplary embodiment, as shown in fig. 2, the charging circuit includes a first capacitive leg and a second capacitive leg arranged in parallel, and a first switching leg and a second switching leg arranged in parallel. The charging circuit in the present embodiment can be applied to 4:1 a charge pump.
In this embodiment, as shown in fig. 2, the charging circuit includes a first capacitor branch, a second capacitor branch, a third capacitor branch and a fourth capacitor branch, where the first capacitor branch and the second capacitor branch are the same as the 3:1 charge pump described above, and further description is omitted here. The third capacitive branch includes a switch Q11 and a capacitor C1 connected in series, the third capacitive branch is disposed between the switches Q21, the fourth capacitive branch includes a switch Q12 and a capacitor C4 connected in series, and the fourth capacitive branch is disposed between the input terminal 100 and the switch Q22. Since the voltage value provided by the input terminal 100 is 4U, and the voltage value that can be received by the battery 300 is U, in order to avoid damage to the battery 300 caused by high voltage and improve the charging efficiency, the capacitor C1, the capacitor C2, the capacitor C3, the capacitor C4, the capacitor C5 and the capacitor C6 need to be precharged, the voltages of the capacitor C2 and the capacitor C5 are charged to 2U, the voltages of the capacitor C3 and the capacitor C6 are charged to U, and the voltages of the capacitor C1 and the capacitor C4 are charged to U, so as to ensure that the voltage value that is transmitted to the battery 300 after each charging path is passed through after the switch is adjusted. In the first capacitive branch and the second capacitive branch, the capacitor C2 and the capacitor C5 have the same function, and the capacitor C3 and the capacitor C6 have the same function. The third capacitor branch and the fourth capacitor have the same function, i.e. the capacitor C1 and the capacitor C4 have the same function.
As shown in fig. 2, the charging circuit includes a first grounding branch and a second grounding branch, the first grounding branch is provided with a switch Q71, one end of the switch Q71 is grounded, the other end of the switch Q71 is connected with a capacitor C4, the second grounding branch is provided with a switch Q72, one end of the switch Q72 is grounded, and the other end of the switch Q72 is connected with the capacitor C1.
As shown in fig. 2, the charging circuit further includes a first output branch and a second output branch, the first output branch is provided with a switch Q81, one end of the switch Q81 is connected with a switch Q1 and a capacitor C4 respectively, the other end of the switch Q81 is connected with an output end 200, the second output branch is provided with a switch Q82, one end of the switch Q82 is connected with a switch Q11 and a capacitor C1 respectively, and the other end of the switch Q82 is connected with the output end 200.
In some embodiments, as shown in fig. 2, the positive terminal (+) of the input terminal 100 is connected to the switch Q11 and the switch Q12, respectively, the negative terminal (-) of the input terminal 100 is grounded, the output voltage of the input terminal 100 is 4U, and the charging circuit provided in this embodiment can convert the input voltage of the input terminal 4U into the output voltage of the output terminal U, that is, the voltage value of the input terminal 100 is four times the voltage value of the output terminal 200, so as to satisfy the charging voltage U of the battery 300.
Wherein, referring to fig. 2, the charging circuit includes a first charging path combination and a second charging path combination that alternately operate, the first charging path combination including a first charging path, a second charging path, a third charging path, and a seventh charging path in parallel, and the second charging path combination including a fourth charging path, a fifth charging path, a sixth charging path, and an eighth charging path in parallel. The first charging path, the second charging path, the third charging path, the fourth charging path, the fifth charging path, and the sixth charging path according to the present embodiment (refer to fig. 2) are the same as the implementation principle in the above embodiment (refer to fig. 1), and will not be described in detail here.
Referring to fig. 2, the switch Q71 and the switch Q81 are controlled to be turned on, the voltage source of the seventh charging path is a capacitor C4, one end of the capacitor C4 is sequentially connected to the output terminal 200 through the switch Q81, and the other end of the capacitor C4 is grounded through the switch Q71, so that the electric energy pre-stored in the capacitor C4 can be transmitted to the output terminal 200. In the seventh charging path, since the precharge voltage of the capacitor C4 is U, the capacitor C4 is used as a voltage source, the switch Q71 is turned on to achieve grounding, and the switch Q81 is turned on to connect the capacitor C4 with the output terminal 200, so as to form a power supply loop, and the precharge voltage U in the capacitor C4 is directly delivered to the output terminal 200. It is understood that the eighth charging path corresponds to the seventh charging path, the voltage source of the eighth charging path is a capacitor C1, when the charging circuit is switched from the first charging path combination to the second charging path combination, one end of the capacitor C1 is connected to the output terminal 200 through the switch Q82, the other end of the capacitor C1 is grounded through the switch Q72, and the implementation principle of the eighth charging path is the same as that of the seventh charging path, which will not be described in detail herein.
In summary, when the control switch Q11, the switch Q21, the switch Q31, the switch Q41, the switch Q51, the switch Q61, the switch Q71, and the switch Q81 are turned on and the control switch Q12, the switch Q22, the switch Q32, the switch Q42, the switch Q52, the switch Q62, the switch Q72, and the switch Q82 are turned off, the first charging path operates in combination, and the first charging path, the second charging path, the third charging path, and the seventh charging path charge the battery 300. When the control switch Q12, the switch Q22, the switch Q32, the switch Q42, the switch Q52, the switch Q62, the switch Q72, and the switch Q82 are turned on and the control switch Q11, the switch Q21, the switch Q31, the switch Q41, the switch Q51, the switch Q61, the switch Q71, and the switch Q81 are turned off, the second charging path operates in combination, and the fourth charging path, the fifth charging path, the sixth charging path, and the eighth charging path charge the battery 300. The first charging path combination and the second charging path combination alternately work, and four charging paths simultaneously supply power to the battery 300 in each charging path combination, so that quick charging is realized, and charging efficiency is improved.
In some embodiments, as shown in fig. 1 and 2, any of switch Q11, switch Q12, switch Q21, switch Q22, switch Q31, switch Q32, switch Q41, switch Q42, switch Q51, switch Q52, switch Q61, switch Q62, switch Q71, switch Q72, switch Q81, and switch Q82 may be a transistor or a field effect transistor.
If the switch is a triode, the control end of the switch may be the base electrode of the triode, the input end of the switch may be the collector electrode (or emitter electrode) of the triode, and the output end of the switch may be the emitter electrode (or collector electrode) of the triode. If the switch is a field effect transistor, the control end of the switch can be the grid electrode of the field effect transistor, the input end of the switch can be the drain electrode (or source electrode) of the field effect transistor, and the output end of the switch can be the source electrode (or drain electrode) of the field effect transistor. The input and output terminals of the switch may also be interchanged, which is not limited in any way by the embodiments of the utility model.
The triode may be an NPN-type triode or a PNP-type triode, and the field effect transistor may include an N-channel type field effect transistor, a P-channel type field effect transistor, and the like, which is not limited in any way by the embodiment of the present utility model.
In some embodiments, as shown in fig. 1 and 2, the charging circuit includes a control module, where the control module is connected with a control end of a triode or a field effect transistor, and the control module controls each switch, so that different charging paths of the charging circuit are alternately connected with the battery 300 to charge the battery 300, and compared with the conventional technology, the setting number of capacitors and the withstand voltage requirement of the capacitors can be reduced, thereby saving cost.
According to an exemplary embodiment of the present disclosure, the present disclosure provides a charge pump chip on which the charging circuit provided in the above embodiments of the present disclosure is integrated. The charge pump chip integrated with the charging circuit can automatically switch the charging path to charge the battery through discharging of different capacitors, the setting quantity of the capacitors in the charging circuit can be reduced while the quick charging scheme is realized, the voltage withstand value requirement on the capacitors can be reduced, and the cost is saved.
Note that, no matter 3:1 charge pump or 4: the charge pump 1 can adopt the same charging circuit, and the capacitor C1, the capacitor C4 and a control switch related to the capacitor C1 and the capacitor C4 are not connected into the circuit as long as the positions of the positive electrode terminal and the negative electrode terminal of the input end connected to the charging circuit are required to be adjusted. Of course, it will be appreciated that different charging circuits may be selected for either the 3:1 charge pump or the 4:1 charge pump, with the charging circuits being largely identical, the charge pump conversion circuit ratio of the 4:1 charge pump being 3: the charge pump switching circuit of 1 adds the capacitor C1 and the capacitor C4 and the related control switch, refer to the above embodiments specifically, and are not described herein.
According to an exemplary embodiment of the present disclosure, the present disclosure provides a terminal device, on which the charging circuit provided in the above embodiment of the present disclosure is disposed. The terminal equipment provided with the charging circuit provided by the embodiment of the disclosure has the advantages that the occupied area of the charging circuit on the circuit board is reduced, and the occupied space in the terminal equipment is reduced.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. The charging circuit is characterized by comprising a first capacitor branch and a second capacitor branch which are arranged in parallel, wherein the first capacitor branch comprises a capacitor C2 and a capacitor C3 which are arranged in series, and the second capacitor branch comprises a capacitor C5 and a capacitor C6 which are arranged in series;
the capacitor C2 is connected to an input end through a switch Q21, the capacitor C3 is connected to an output end through a switch Q62, the capacitor C5 is connected to the input end through a switch Q22, and the capacitor C6 is connected to the output end through a switch Q61;
a switch Q32 is arranged between the capacitor C2 and the capacitor C6, and a switch Q31 is arranged between the capacitor C5 and the capacitor C3;
the charging circuit further comprises a first switch branch and a second switch branch which are arranged in parallel, wherein the first switch branch comprises a switch Q41 and a switch Q52 which are connected in series, the second switch branch comprises a switch Q42 and a switch Q51 which are connected in series, the switch Q41 and the switch Q42 are grounded, the switch Q52 and the switch Q51 are respectively connected with the output end, a capacitor C3 is connected with the switch Q51 in parallel, a capacitor C2 is connected with the switch Q42 in parallel, a capacitor C5 is connected with the switch Q41 in parallel, and the switch Q52 is connected with a capacitor C6 in parallel;
the voltage value output to the output end by the charging circuit is U, the precharge voltage of the capacitor C2 and the capacitor C5 is 2U, and the precharge voltage of the capacitor C3 and the capacitor C6 is U.
2. The charging circuit of claim 1, wherein the positive terminal of the input terminal is connected to the switch Q21 and the switch Q22, respectively, the negative terminal of the input terminal is grounded, and the output voltage of the input terminal is 3U.
3. The charging circuit of claim 2, wherein the charging circuit comprises a first charging path combination and a second charging path combination that alternate, the first charging path combination comprising a first charging path, a second charging path, and a third charging path in parallel;
the first charging path comprises the input end, the switch Q21, the capacitor C2, the switch Q51 and the output end which are sequentially connected;
the voltage source of the second charging path is the capacitor C5, one end of the capacitor C5 is connected to the output end through the switch Q31, the capacitor C3 and the switch Q51 in sequence, and the other end of the capacitor C5 is grounded through the switch Q41;
the voltage source of the third charging path is the capacitor C6, one end of the capacitor C6 is connected with the output end through the switch Q61, and the other end of the capacitor C6 is grounded through the switch Q41;
the second charging path combination comprises a fourth charging path, a fifth charging path and a sixth charging path which are parallel;
the fourth charging path comprises the input end, the switch Q22, the capacitor C5, the switch Q52 and the output end which are sequentially connected;
the voltage source of the fifth charging path is the capacitor C2, one end of the capacitor C2 is connected to the output end through the switch Q32, the capacitor C6 and the switch Q52 in sequence, and the other end of the capacitor C2 is grounded through the switch Q42;
the voltage source of the sixth charging path is the capacitor C3, one end of the capacitor C3 is connected to the output end through the switch Q62, and the other end of the capacitor C3 is grounded through the switch Q42.
4. The charging circuit of claim 1, comprising a third capacitive branch comprising a switch Q11 and a capacitor C1 in series, the third capacitive branch being disposed between the switches Q21, and a fourth capacitive branch comprising a switch Q12 and a capacitor C4 in series, the fourth capacitive branch being disposed between the input and the switch Q22;
the charging circuit comprises a first grounding branch and a second grounding branch, wherein the first grounding branch is provided with a switch Q71, one end of the switch Q71 is grounded, the other end of the switch Q71 is connected with the capacitor C4, the second grounding branch is provided with a switch Q72, one end of the switch Q72 is grounded, and the other end of the switch Q72 is connected with the capacitor C1;
the charging circuit further comprises a first output branch and a second output branch, wherein the first output branch is provided with a switch Q81, one end of the switch Q81 is respectively connected with the switch Q1 and the capacitor C4, the other end of the switch Q81 is connected with the output end, the second output branch is provided with a switch Q82, one end of the switch Q82 is respectively connected with the switch Q11 and the capacitor C1, and the other end of the switch Q82 is connected with the output end;
the precharge voltage of the capacitor C1 and the capacitor C4 is U.
5. The charging circuit of claim 4, wherein the positive terminal of the input terminal is connected to the switch Q11 and the switch Q12, respectively, the negative terminal of the input terminal is grounded, and the output voltage of the input terminal is 4U.
6. The charging circuit of claim 5, wherein the charging circuit comprises a first charging path combination and a second charging path combination that alternate, the first charging path combination comprising a first charging path, a second charging path, a third charging path, and a seventh charging path in parallel;
the first charging path comprises the input end, the switch Q21, the capacitor C2, the switch Q51 and the output end which are sequentially connected;
the voltage source of the second charging path is the capacitor C5, one end of the capacitor C5 is connected to the output end through the switch Q31, the capacitor C3 and the switch Q51 in sequence, and the other end of the capacitor C5 is grounded through the switch Q41;
the voltage source of the third charging path is the capacitor C6, one end of the capacitor C6 is connected with the output end through the switch Q61, and the other end of the capacitor C6 is grounded through the Q41;
the voltage source of the seventh charging path is the capacitor C4, one end of the capacitor C4 is connected to the output end through the switch Q81 in turn, and the other end of the capacitor C4 is grounded through the switch Q71;
the second charging path combination comprises a fourth charging path, a fifth charging path, a sixth charging path and an eighth charging path which are parallel;
the fourth charging path comprises the input end, the switch Q22, the capacitor C5, the switch Q52 and the output end which are sequentially connected;
the voltage source of the fifth charging path is the capacitor C2, one end of the capacitor C2 is connected to the output end through the switch Q32, the capacitor C6 and the switch Q52 in sequence, and the other end of the capacitor C2 is grounded through the switch Q42;
the voltage source of the sixth charging path is the capacitor C3, one end of the capacitor C3 is connected to the output end through the switch Q62, and the other end of the capacitor C3 is grounded through the Q42;
the voltage source of the eighth charging path is a capacitor C1, one end of the capacitor C1 is connected to the output end through the switch Q82, and the other end of the capacitor C1 is grounded through the switch Q72.
7. The charging circuit of claim 4, wherein any one of the switch Q11, the switch Q12, the switch Q21, the switch Q22, the switch Q31, the switch Q32, the switch Q41, the switch Q42, the switch Q51, the switch Q52, the switch Q61, the switch Q62, the switch Q71, the switch Q72, the switch Q81, and the switch Q82 is a transistor or a field effect transistor.
8. The charging circuit of claim 7, wherein the charging circuit comprises a control module, the control module being connected to a control terminal of the transistor or the fet.
9. A charge pump chip, characterized in that the charge pump chip has integrated thereon a charging circuit according to any one of claims 1 to 8.
10. A terminal device, characterized in that the terminal device is provided with a charging circuit as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320135982.XU CN219181229U (en) | 2023-01-13 | 2023-01-13 | Charging circuit, charge pump chip and terminal equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320135982.XU CN219181229U (en) | 2023-01-13 | 2023-01-13 | Charging circuit, charge pump chip and terminal equipment |
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| Publication Number | Publication Date |
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| CN219181229U true CN219181229U (en) | 2023-06-13 |
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| CN202320135982.XU Active CN219181229U (en) | 2023-01-13 | 2023-01-13 | Charging circuit, charge pump chip and terminal equipment |
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| Country | Link |
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| CN (1) | CN219181229U (en) |
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