Charge pump conversion module, power management circuit and method and power supply module

Abstract

The invention relates to a charge pump conversion module, a power management circuit and method and a power supply module, target conversion processing is performed on a first voltage signal through the charge pump conversion module to obtain a second voltage signal, and voltage regulation processing is performed on the second voltage signal through a first voltage regulation module to obtain a first power supply signal. The charge pump conversion module performs matched target conversion processing on the first voltage signal, and the target conversion processing can obtain a second voltage signal suitable for transient voltage drop under a high-power load and transient response of the first voltage regulation module on the basis of efficient conversion. And the first voltage regulation module can carry out voltage regulation processing more efficiently. Therefore, the first voltage regulation module can more efficiently process and obtain the first power supply signal only with a lower transformation ratio. The power supply efficiency of low-voltage nuclear power supply can be greatly improved, the heat loss of the whole machine is greatly reduced, and the endurance of the whole machine is improved.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a charge pump conversion module, a power management circuit and method, and a power supply module. Background Art

[0002] Inside electronic devices, the power supply voltages required by various functional modules are usually different. For example, the voltages required to power the SOC (System on Chip), camera module, and screen are all different. Therefore, different Buck converters are needed to convert the battery voltage to power each functional module.

[0003] However, for functional modules with a small supply voltage, such as less than 1V, the efficiency of a high-ratio Buck converter is low, resulting in high power consumption and severe heating of the electronic equipment. Summary of the invention

[0004] The embodiments of the present application provide a charge pump conversion module, a power management circuit and method, and a power supply module, which can improve the change efficiency of the Buck converter and reduce power consumption.

[0005] A first aspect of the present application provides a power management circuit, comprising:

[0006] A charge pump conversion module, used to support target conversion processing of the received first voltage signal to obtain a second voltage signal;

[0007] a first voltage regulating module, connected to the output end of the charge pump conversion module, and configured to perform voltage regulation processing on the second voltage signal to obtain a first power supply signal to supply power to the first load;

[0008] Among them, the target conversion processing includes at least one of a first conversion processing and a second conversion processing, the first conversion processing is used to convert the first voltage signal with a preset ratio when the first voltage signal is in a first voltage range, and the second conversion processing is used to convert the first voltage signal to a preset voltage when the first voltage signal is in a second voltage range, and the minimum value of the first voltage range is greater than or equal to the maximum value of the second voltage range.

[0009] A second aspect of the present application provides a charge pump conversion module, comprising:

[0010] An energy storage switching unit, configured to receive a first voltage signal;

[0011] A voltage conversion unit is used to be connected to the energy storage switching unit and an external first voltage regulation module respectively; wherein:

[0012] When the first voltage signal is within the first voltage range, the energy storage switching unit is used to transmit the received first voltage signal to the voltage conversion unit, so that the voltage conversion unit performs a conversion process of the first voltage signal with a preset transformation ratio, obtains a second voltage signal and outputs it to the first voltage regulation module; when the first voltage signal is within the second voltage range, the energy storage switching unit is in an energy storage state, so as to be used together with the voltage conversion unit to convert the first voltage signal to a preset voltage;

[0013] The minimum value of the first voltage range is greater than or equal to the maximum value of the second voltage range; the first voltage regulation module is used to perform voltage regulation processing on the second voltage signal to obtain a first power supply signal to supply power to the first load.

[0014] A third aspect of the present application provides a power supply module, including:

[0015] A power supply module, configured to provide a first voltage signal; and

[0016] The power management circuit as described above, or the charge pump conversion module as described above.

[0017] A fourth aspect of the present application provides an electronic device, including:

[0018] a first load; and

[0019] A power supply module as described above.

[0020] A fifth aspect of the present application provides a power management method, comprising:

[0021] Controlling the charge pump conversion module to perform target conversion processing on the received first voltage signal to obtain a second voltage signal;

[0022] Controlling the first voltage regulating module to perform voltage regulation processing on the second voltage signal to obtain a first power supply signal to supply power to the first load;

[0023] Among them, the target conversion processing includes at least one of a first conversion processing and a second conversion processing, the first conversion processing is used to convert the first voltage signal with a preset ratio when the first voltage signal is in a first voltage range, and the second conversion processing is used to convert the first voltage signal to a preset voltage when the first voltage signal is in a second voltage range, and the minimum value of the first voltage range is greater than or equal to the maximum value of the second voltage range.

[0024] The charge pump conversion module, power management circuit and method, power supply module, and electronic device mentioned above can obtain the first power supply signal by subjecting the charge pump conversion module to target conversion processing of the first voltage signal to obtain the second voltage signal, and then subjecting the second voltage signal to voltage regulation processing by the first voltage regulation module. Since the charge pump conversion module has performed a matching target conversion processing on the first voltage signal, and the target conversion processing can obtain a second voltage signal suitable for transient voltage drops under high-power loads and the transient response of the first voltage regulation module itself on the basis of efficient conversion, it is convenient for the first voltage regulation module to perform voltage regulation processing more efficiently. Therefore, the first voltage regulation module only needs a lower transformation ratio to process and obtain the first power supply signal more efficiently. In particular, when the first voltage regulation module works in a light-load area, its loss is mainly switching loss, and the switching loss can be greatly reduced when the input voltage is low. Therefore, the power management circuit can greatly improve the power supply efficiency of the low-voltage core power supply, greatly reduce the heat loss of the whole machine, and improve the endurance of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 One of the structural block diagrams of a power management circuit according to an embodiment;

[0027] Figure 2 It is a structural block diagram of a power management circuit in the related art;

[0028] Figure 3 is a structural block diagram of a charge pump conversion module according to an embodiment;

[0029] Figure 4 is a circuit diagram of a charge pump conversion module according to an embodiment;

[0030] Figure 5 The second circuit diagram of the charge pump conversion module of an embodiment;

[0031] Figure 6 This is a second structural block diagram of a power management circuit according to an embodiment;

[0032] Figure 7 is a circuit diagram of a first voltage regulating module according to an embodiment;

[0033] Figure 8 The third structural block diagram of a power management circuit of an embodiment;

[0034] Fig. 9 The fourth structural block diagram of a power management circuit of an embodiment;

[0035] Fig.10 The fifth structural block diagram of a power management circuit of an embodiment;

[0036] Fig.11 is a flow chart of a power management method according to an embodiment;

[0037] Fig.12 This is one of the structural block diagrams of a power supply module of an embodiment;

[0038] Fig.13 This is a second structural block diagram of a power supply module according to an embodiment;

[0039] Fig.14 FIG. 4 is a structural block diagram of an electronic device in an embodiment. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] It is understood that the terms "first", "second", etc. used in this application can be used to describe various elements in this article, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to another element or there may be a centering element at the same time.

[0042] Figure 1 is a structural block diagram of a power management circuit according to an embodiment, Figure 1 In this embodiment, the power management circuit 10 includes a charge pump conversion module 110 and a first voltage regulation module 120 .

[0043] The charge pump conversion module 110 is used to support the target conversion processing of the received first voltage signal (such as VPH_PWR1 in the figure) to obtain the second voltage signal (such as VPH_PWR2 in the figure); the first voltage regulation module 120 is connected to the output end of the charge pump conversion module 110, and is used to perform voltage regulation processing on the second voltage signal to obtain a first power supply signal to supply power to the first load. The target conversion processing includes at least one of the first conversion processing and the second conversion processing, the first conversion processing is used to convert the first voltage signal to a preset ratio when the first voltage signal is in the first voltage range, and the second conversion processing is used to convert the first voltage signal to a preset voltage when the first voltage signal is in the second voltage range, and the minimum value of the first voltage range is greater than or equal to the maximum value of the second voltage range.

[0044] Among them, the first voltage signal can be a voltage signal output by a battery module, or a signal formed after the voltage signal output by a battery module is converted and processed. The battery module can be a single-cell battery module or a battery module with multiple cells connected in series. It can be understood that no matter whether the battery module is directly derived from the battery module or indirectly derived from the battery module, the first voltage signal changes accordingly with the change of the battery voltage of the battery module itself, that is, the voltage of the first voltage signal can correspond to a certain voltage range. For example, taking the first voltage signal directly derived from a single-cell battery module as an example, the voltage range of the first voltage signal can be 2.5V-4.5V; it can also be 3V-4.5V, and further, it can also be 3.4V-4.5V.

[0045] The charge pump conversion module 110 is used to perform target conversion processing on the received first voltage signal to obtain a second voltage signal corresponding to the first voltage signal, so as to provide power to the subsequent first voltage regulation module 120. The target conversion processing includes at least one of the first conversion processing and the second conversion processing. The first conversion processing is to convert the first voltage signal into a preset ratio, which can be understood as the charge pump conversion module 110 can support working in the ratio conversion mode; the second conversion processing is to convert the first voltage signal to a preset voltage, which can be understood as the charge pump conversion module 110 can support working in the voltage regulation mode.

[0046] It is understood that, according to actual needs, the charge pump conversion module 110 may only support one of the first conversion process and the second conversion process; it may also have both conversion processing functions, and switch between the two conversion processes according to the voltage range of the first voltage signal. It is understood that the specific values ​​of the preset transformation ratio and the preset voltage can be adjusted and set according to actual needs, and no further limitation is made here.

[0047] The target conversion process can match the voltage range of the first voltage signal. The voltage range of the first voltage signal may include the first voltage range and / or the second voltage range, and the minimum value of the first voltage range is greater than or equal to the maximum value of the second voltage range. It can be understood that when the voltage range includes the first voltage range and the second voltage range, the voltage range can be divided according to the preset transformation ratio of the first conversion process and / or the preset voltage of the second conversion process supported by the charge pump conversion module 110, the target range of the second voltage signal, etc. The charge pump conversion module 110 performs matching conversion processing in different voltage ranges, thereby improving the conversion processing efficiency and obtaining a second voltage signal matching the target range.

[0048] For example, taking the case where the first voltage signal is directly derived from a single-cell battery module and the voltage range of the first voltage signal is 2.5V-4.5V, at this time, assuming that the highest voltage of a certain optional first voltage regulating module 120 is 1.2V, considering the transient voltage drop under high-power load and the transient response of the subsequent first voltage regulating module 120 itself, the target range of the second voltage signal can be set to be greater than or equal to 1.5. At this time, the voltage range of 2.5V-4.5V can be divided into a first voltage range greater than 3V and a second voltage range less than 3V, the preset ratio can be 2:1, and the preset voltage can be 1.5V. When the first voltage signal is greater than 3V, the charge pump conversion module 110 can perform a first conversion process with a ratio of 2:1 on the first voltage signal to quickly and efficiently obtain a second voltage signal greater than 1.5V; when the first voltage signal is less than 3V, the charge pump conversion module 110 can perform a second conversion process with a preset voltage of 1.5V on the first voltage signal to quickly and efficiently obtain a second voltage signal stable at 1.5V. Therefore, on the one hand, the charge pump conversion module 110 can perform matching target conversion processing based on the voltage range to efficiently convert the first voltage signal and improve the efficiency of the conversion processing; on the other hand, the division of the voltage range takes into account issues such as transient voltage drop and transient response, and can obtain a second voltage signal that is more suitable for regulation processing by the first voltage regulation module 120, thereby facilitating the first voltage regulation module 120 to perform voltage regulation processing with higher efficiency.

[0049] The first voltage regulating module 120 draws power from the charge pump conversion module 110 to receive the second voltage signal after the first conversion process or the second conversion process, and performs voltage regulation on the received second voltage signal to obtain a first power supply signal, and supplies power to the first load corresponding to the power supply requirement. It can be understood that different first loads may require different power supply voltages, and therefore, different first voltage regulating modules 120 need to convert the received voltage signal into different voltages to supply power to the first load corresponding to the power supply requirement.

[0050] When the first load is a low voltage power supply (eg, less than 1V) demand load, taking the voltage range of the first voltage signal as 2.5V-4.5V as an example, in the relevant embodiments, Figure 2 As shown, if the first voltage regulating module 120 directly draws power from the first voltage signal and converts the first voltage signal to below 1V, the maximum transformation ratio of the first voltage regulating module 120 needs to be above 4. However, with the current chip technology and inductor technology, the efficiency of the first voltage regulating module 120 to achieve a transformation ratio of about 4 is relatively low, generally around 85%. On the one hand, the low power conversion efficiency will lead to a large overall power consumption of the power management circuit 10, and will cause serious heating of the whole machine when the load is heavy; on the other hand, the low power conversion efficiency will also lead to low utilization of the battery module, affecting the endurance of the whole machine.

[0051] In the present embodiment, the first voltage regulating module 120 directly obtains power from the charge pump conversion module 110, receives the second voltage signal, and then performs voltage regulation processing on the second voltage signal to obtain the first power supply signal to supply power to the first load. Since the charge pump conversion module 110 has performed a matching target conversion processing on the first voltage signal, and the target conversion processing can obtain a second voltage signal suitable for transient voltage drop under high-power load and the transient response of the first voltage regulating module 120 itself on the basis of efficient conversion, it is convenient for the first voltage regulating module 120 to perform voltage regulation processing with higher efficiency. Therefore, the first voltage regulating module 120 only needs a lower transformation ratio to more efficiently process and obtain the first power supply signal. In particular, when the first voltage regulating module 120 works in the light load area, its loss is mainly switching loss, and the switching loss can be greatly reduced when the input voltage is low. Therefore, the power management circuit 10 can greatly improve the power supply efficiency of low-voltage core power supply, such as the power supply efficiency of low-voltage loads such as CPU and Memory, especially the power supply efficiency under light load, greatly reduce the heat loss of the whole machine, and improve the endurance of the whole machine.

[0052] The power management circuit 10 provided in this embodiment performs a target conversion process on the first voltage signal by the charge pump conversion module 110 to obtain a second voltage signal, and then performs a voltage regulation process on the second voltage signal by the first voltage regulation module 120 to obtain a first power supply signal. Since the charge pump conversion module 110 has performed a matching target conversion process on the first voltage signal, and the target conversion process can obtain a second voltage signal suitable for transient voltage drops under high-power loads and the transient response of the first voltage regulation module 120 itself on the basis of efficient conversion, it is convenient for the first voltage regulation module 120 to perform voltage regulation processing more efficiently. Therefore, the first voltage regulation module 120 only needs a lower transformation ratio to more efficiently process and obtain the first power supply signal. In particular, when the first voltage regulation module 120 works in a light-load area, its loss is mainly switching loss, and the switching loss can be greatly reduced when the input voltage is low. Therefore, the power management circuit 10 can greatly improve the power supply efficiency of the low-voltage core power supply, greatly reduce the heat loss of the whole machine, and improve the endurance of the whole machine.

[0053] In one embodiment, if Figure 3 As shown, the target conversion process includes a first conversion process and a second conversion process, and the charge pump conversion module 110 includes: an energy storage switching unit 111 and a voltage conversion unit 112 .

[0054] The energy storage switching unit 111 is used to receive the first voltage signal; the voltage conversion unit 112 is used to connect to the energy storage switching unit 111 and the first voltage regulation module 120 respectively; wherein: when the first voltage signal is in the first voltage range, the energy storage switching unit 111 is used to transmit the received first voltage signal to the voltage conversion unit 112, so that the voltage conversion unit 112 performs a first conversion process on the first voltage signal; when the first voltage signal is in the second voltage range, the energy storage switching unit 111 is in an energy storage state, so as to be used together with the voltage conversion unit 112 to perform a second conversion process on the first voltage signal.

[0055] The energy storage switching unit can be understood as supporting two working states. One is to support working in the transmission state. Specifically, when the first voltage signal is in the first voltage range, the received first voltage signal is directly transmitted to the voltage conversion unit 112. At this time, the voltage conversion unit 112 can independently support the first conversion processing of the first voltage signal to obtain the second voltage signal after the preset ratio processing. The second is to support working in the energy storage state. Specifically, when the first voltage signal is in the second voltage range, the energy storage switching unit 111 and the voltage conversion unit 112 cooperate to form a whole conversion processing, which is used to perform the second conversion processing on the first voltage signal to obtain the second voltage signal at the preset voltage value. Therefore, through the energy storage switching unit 111 and the voltage conversion unit 112, the charge pump conversion module 110 can support the ratio conversion mode, the voltage regulation mode and the switching function of the two modes, so as to efficiently convert the first voltage signal and obtain the second voltage signal that is more suitable for the regulation and processing of the first voltage regulation module 120.

[0056] In one embodiment, if Figure 4 As shown, the energy storage switching unit 111 includes: an inductor L1 and a common switch SL.

[0057] The first end of the inductor L1 is connected to the first end of the common switch SL to input the first voltage signal, and the second end of the inductor L1 is connected to the second end of the common switch SL and the voltage conversion unit 112 respectively; when the common switch SL is in the on state, the energy storage switching unit 111 transmits the first voltage signal to the voltage conversion unit 112; when the common switch SL is in the off state, the energy storage switching unit 111 is in the energy storage state. Therefore, based on the switching of the on and off states of the common switch SL, the energy storage switching unit 111 can be switched between the transmission state and the energy storage state, thereby realizing the switching function of the ratio conversion mode and the voltage regulation mode of the charge pump conversion module 110.

[0058] Optionally, the common switch SL can be a single-pole single-throw switch or a switch tube. It can be understood that in other embodiments, other types of switching devices can be selected as the common switch SL by adjusting the connection relationship between the public switch and the inductor L1. For example, a single-pole double-throw switch can be selected to select the connection state between the conductive inductor L1 or the direct path and the voltage conversion unit 112 respectively, so as to realize the switching of the inductor L1 and the direct path, thereby realizing the switching function of the transmission state and the energy storage state. This embodiment does not make further limitations on this.

[0059] In one of the embodiments, please refer to Figure 4 The voltage conversion unit 112 includes: a first capacitor CflyA, a second capacitor CflyB, a load capacitor Cout and a plurality of switches.

[0060] Among them, the first capacitor CflyA and the second capacitor CflyB can be flying capacitors respectively; one end of the load capacitor Cout is grounded, and the other end is used as the output end of the charge pump conversion module 110 to output the second voltage signal. Multiple switches are used to switch between different on-off states, so that the energy storage switching unit 111, the first capacitor CflyA, the second capacitor CflyB, and the load capacitor Cout are in different connection states. In different connection states, the first capacitor CflyA, the second capacitor CflyB, and the load capacitor Cout implement different charging and discharging processes, thereby realizing the conversion function of the first voltage signal.

[0061] Specifically, when the energy storage switch unit is in the transmission state, the first capacitor CflyA, the second capacitor CflyB, and the load capacitor Cout jointly form a preset ratio conversion circuit, and the first capacitor CflyA, the second capacitor CflyB, and the load capacitor Cout are switched in different connection states so that the first capacitor CflyA, the second capacitor CflyB, and the load capacitor Cout realize different charging and discharging processes to support the first conversion processing of the preset ratio; when the energy storage switch unit is in the energy storage state, the inductor L1, the first capacitor CflyA, the second capacitor CflyB, and the load capacitor Cout jointly form a voltage regulation circuit, and the inductor L1, the first capacitor CflyA, the second capacitor CflyB, and the load capacitor Cout are switched in different connection states so that the inductor L1, the first capacitor CflyA, the second capacitor CflyB, and the load capacitor Cout realize different charging and discharging processes to support the second conversion processing to the preset voltage.

[0062] For further information, please refer to Figure 4 The plurality of switches include a first switch S1A, a second switch S2A, a third switch S3A, a fourth switch S4A, a fifth switch S1B, a sixth switch S2B, a seventh switch S3B and an eighth switch S4B.

[0063] The first end of the first switch S1A is respectively connected to the first end of the fifth switch S1B and the energy storage switching unit 111, the second end of the first switch S1A is respectively connected to the first end of the second switch S2A and the first end of the first capacitor CflyA, the second end of the second switch S2A is respectively connected to the first end of the third switch S3A, the first end of the load capacitor Cout, the second end of the sixth switch S2B, and the first end of the seventh switch S3B, the second end of the third switch S3A is respectively connected to the second end of the first capacitor CflyA and the first end of the fourth switch S4A, the second end of the fifth switch S1B is respectively connected to the first end of the second capacitor CflyB and the first end of the sixth switch S2B, the second end of the seventh switch S3B is respectively connected to the first end of the eighth switch S4B and the second end of the second capacitor CflyB, the second end of the fourth switch S4A, the second end of the load capacitor Cout, and the second end of the eighth switch S4B are respectively connected to the equivalent ground end; wherein, the second voltage signal is output at the first end of the load capacitor Cout. Thus, based on the switching of the on-off state of each of the above switches, the energy storage switching unit 111, the first capacitor CflyA, the second capacitor CflyB, and the load capacitor Cout can be in different connection states. Optionally, each switch can be a single-pole single-throw switch or a switch tube, and this embodiment does not limit the specific type of the switch.

[0064] It can be understood that the present embodiment only shows one composition method of multiple switches. In other embodiments, the multiple switches may also be composed of other numbers of switches. For example, the voltage conversion unit 112 may also include a conventional four-switch buck conversion circuit. The buck conversion circuit can cooperate with the energy storage switching unit 111 to enable the charge pump conversion module 110 to achieve the corresponding change processing function.

[0065] In one embodiment, the power management circuit 10 further includes: a control module.

[0066] The control module is respectively connected to the controlled end of each switch in the above embodiment, and is used to control the on-off state of each switch, thereby realizing the switching control of the first conversion process and the second conversion process of the charge pump conversion module 110. Optionally, the control module can control the on-off state, occupancy ratio, etc. of each switch according to the relevant power supply control instructions input from the outside. It can be understood that based on the specific device type of each switch unit, the control module can output a corresponding control signal to control the on-off state of each switch, which is not further limited in this embodiment.

[0067] In one embodiment, the target conversion process includes a first conversion process such as Figure 5As shown, the charge pump conversion module 110 includes: a first capacitor CflyA, a second capacitor CflyB, a load capacitor Cout and multiple switches, and the multiple switches are used to switch between different on-off states, so that the first capacitor CflyA, the second capacitor CflyB and the load capacitor Cout are in different connection states.

[0068] The first capacitor CflyA, the second capacitor CflyB, the load capacitor Cout and the multiple switches in this embodiment can refer to the introduction of the relevant embodiments of the voltage conversion unit 112 when the energy storage switching unit 111 is in the transmission state in the above embodiment, and will not be repeated here.

[0069] In one embodiment, if Figure 6 As shown, the number of the first voltage regulating modules 120 is multiple ( Figure 6 Taking three first voltage regulating modules 120 as an example for illustration, the multiple first voltage regulating modules 120 are respectively connected to the multiple first loads.

[0070] Among them, multiple first voltage regulating modules 120 are respectively connected to the output end of the charge pump conversion module 110, and each first voltage regulating module 120 only needs to convert the received second voltage signal with a corresponding transformation ratio based on the power supply demand of the corresponding first load, thereby improving the conversion efficiency of each first voltage regulating module 120 and further improving the overall efficiency of the power management circuit 10. Optionally, the voltage regulation process can be a step-down process, and each first voltage regulating module 120 can be a Buck converter. By drawing power from the charge pump conversion module 110110, the transformation ratio required by the subsequent Buck converter is greatly reduced, and the device requires a lower withstand voltage, so that the required inductor L1 is smaller than that of a high transformation ratio Buck converter, and the efficiency can be greatly improved.

[0071] It can be understood that the number of Buck converters can be adjusted according to the number of first loads, and no further limitation is given here. Optionally, each Buck converter may include at least one capacitor, one inductor L1 and multiple switches. For example, each Buck converter includes one capacitor, one inductor L1 and two switches. The connection relationship of each internal device of each Buck converter can be as follows: Figure 7 As shown. Thus, each Buck converter implements a step-down process on the received second voltage signal through the corresponding capacitor, inductor L1 and switch device to obtain a power supply signal that meets the power supply demand of the load. It can be understood that the on-off state of multiple switches of each Buck converter can be controlled by the control module in the above embodiment, or by other control modules, which is not further limited here.

[0072] As follows Figure 4 , Figure 5The topology shown is for the charge pump conversion module 110 and Figure 6 , Figure 8 The working principle of the power management circuit 10 is further explained:

[0073] like Figure 4 As shown, when the charge pump conversion module 110 performs the first conversion process, the common switch SLSL remains turned on, and the first switch S1A, the second switch S2A, the third switch S3A, the fourth switch S4A, the fifth switch S1B, the sixth switch S2B, the seventh switch S3B and the eighth switch S4B all operate in a PWM mode with a preset duty cycle D. At this time, the charge pump conversion module 110 operates in a preset ratio conversion mode, which includes two operating modes:

[0074] Mode 1: the first switch S1A, the third switch S3A, the sixth switch S2B, and the eighth switch S4B are turned on; the fifth switch S1B, the seventh switch S3B, the second switch S2A, and the fourth switch S4A are turned off.

[0075] Mode 2: the first switch S1A, the third switch S3A, the sixth switch S2B, and the eighth switch S4B are turned off; the fifth switch S1B, the seventh switch S3B, the second switch S2A, and the fourth switch S4A are turned on.

[0076] At this time, if the preset duty cycle D is 50%, that is, the charge pump conversion module 110 operates in mode 1 and mode 2 for 50% of the time in one cycle T, the charge pump conversion module 110 supports the first conversion process with a 2:1 ratio.

[0077] When the charge pump conversion module 110 performs the second conversion process, the common switch SL is kept off, and the first switch S1A and the fifth switch S1B are kept on. At this time, the charge pump conversion module 110 operates in a voltage regulation mode, which includes two operating modes:

[0078] Mode 3: the second switch S2A, the fourth switch S4A, the sixth switch S2B, and the eighth switch S4B are turned on; the third switch S3A and the seventh switch S3B are turned off.

[0079] At this time, the first capacitor CflyA and the second capacitor CflyB charge the load capacitor Cout, and the voltage of each capacitor is as follows: VCflyA=VCflyB=VPH_PWR2.

[0080] At this time, the voltage VL of the inductor L1 is: VL=VPH_PWR1-VPH_PWR2.

[0081] Mode 4: the second switch S2A, the fourth switch S4A, the sixth switch S2B, and the eighth switch S4B are turned off; the third switch S3A and the seventh switch S3B are turned on.

[0082] At this time, the voltage VL of the inductor L1 is as follows:

[0083] VL = VPH_PWR1 - (VCflyA + VPH_PWR2) = VPH_PWR1 - 2 * VPH_PWR2

[0084] Set the duty cycles of the topology working in mode 3 and mode 4 in one working period T to be D and (1 - D) respectively. Since the average value of the voltage VL of the inductor L1 in one period should be zero, we can get:

[0085] D(VPH_PWR1 - VPH_PWR2) + (1 - D)(VPH_PWR1 - 2 * VPH_PWR2) = 0

[0086] From the above formula, we can get:

[0087] VPH_PWR2 = VPH_PWR1 / (2 - D) (1)

[0088] Since 0 < D < 1, substituting it into the above formula, we can get:

[0089] 1 / 2 * VPH_PWR1 < VPH_PWR2 < VPH_PWR1

[0090] Apply the topology in Figure 4 to the power management circuit 10 as shown in Figure 6 . Taking the change range of the first voltage signal VPH_PWR1 as 2.5V to 4.5V and the supply voltage of the first load being less than 1.2V as an example, if the corresponding Buck converters (such as the Buck converters 1 to 3 in Figure 6 ) directly draw power from VPH_PWR1 to supply power to the first load (such as the loads 1 to 3 in Figure 6 ), the voltage conversion ratio is relatively large and the efficiency is low. Through the charge pump conversion module 110, its input voltage is VPH_PWR1 and the output voltage is VPH_PWR2. For the loads 1 to 3 with relatively low required voltages, they draw power from VPH_PWR2. Since the highest output voltage of the Buck converter drawing power from VPH_PWR2 is 1.2V, considering problems such as the transient voltage drop of VPH_PWR1 under high-power loads and the transient response of the Buck converter itself, generally, it is necessary to ensure that VPH_PWR2 > 1.5V.

[0091] Therefore, when VPH_PWR1>3V, the charge pump conversion module 110 operates in a fixed 2:1 ratio mode, and VPH_PWR2>1.5V. When VPH_PWR2<3V, the charge pump conversion module 110 operates in a voltage regulation mode, so that VPH_PWR2 is stabilized at 1.5V. From equation (1), it can be seen that the duty cycle of mode 1 is:

[0092] D=2-(VPH2_PWR / 1.5) (2)

[0093] For Buck converter 1 to Buck converter 3, directly taking power from VPH_PWR2 has a lower transformation ratio than taking power from VPH_PWR1, so the efficiency is higher. Especially when the Buck converter works in the light load area, its loss is mainly switching loss, and the switching loss can be greatly reduced when the input voltage is low. Therefore, the power management circuit 10 can greatly improve the power supply efficiency of the low-voltage core power supply, especially the power supply efficiency under light load.

[0094] like Figure 5 As shown, when the charge pump conversion module 110 performs the first conversion process, the first switch S1A, the second switch S2A, the third switch S3A, the fourth switch S4A, the fifth switch S1B, the sixth switch S2B, the seventh switch S3B and the eighth switch S4B all operate in a PWM mode with a preset duty cycle of 50%. At this time, the charge pump conversion module 110 operates in a 2:1 ratio conversion mode, which includes two operating modes. For related descriptions, refer to Figure 4 The description of the working mode of the preset ratio conversion mode in Figure 5 The topology in the application is as follows Figure 8 In the power management circuit 10 shown, taking the first voltage signal VPH_PWR1>3V and the supply voltage of the first load less than 1.2V as an example, the charge pump conversion module 110 can directly operate in the fixed 2:1 ratio mode, and VPH_PWR2>1.5V.

[0095] In one embodiment, if Fig. 9 As shown, the power management circuit 10 further includes: a second voltage regulation module 130 .

[0096] The second voltage regulating module 130 is connected to the input end of the charge pump conversion module 110 and is used to perform voltage regulation processing on the received first voltage signal to obtain a second power supply signal to supply power to the second load.

[0097] The second voltage regulating module 130 draws power from the battery module to receive the first voltage signal that has not been subjected to the first conversion process and the second conversion process, and performs voltage regulation on the first voltage signal to obtain a second power supply signal to supply power to the second load corresponding to the power supply requirement. It can be understood that different second loads may require different power supply voltages, and therefore, different second voltage regulating modules 130 need to convert the received voltage signal into different voltages to supply power to the second load corresponding to the power supply requirement.

[0098] Alternatively, if Fig.10 As shown, the number of the second voltage regulating modules 130 is multiple ( Fig.10 Taking three second voltage regulating modules 130 as an example, the plurality of second voltage regulating modules are respectively connected to a plurality of second loads (such as load 4 to load 6 in the figure). Optionally, the voltage regulation process of the second voltage regulating module 130 may be a voltage reduction process, such as Fig.10 As shown, each second voltage regulating module 130 may be a Buck converter (Buck converter 4 to Buck converter 6 are shown as examples in the figure). The Buck converter may refer to the relevant introduction in the above embodiments and will not be described again here.

[0099] Optionally, the voltage supply requirement of the second load may be greater than the voltage supply requirement of the first load, that is, the voltage of the second power supply signal may be greater than the voltage of the first power supply signal, and thus, relative to the first load, the second load is a high voltage power supply demand load. Although the second voltage regulation module 130 directly draws power from the first voltage signal, the transformation ratio required to obtain the second power supply signal is relatively small compared to the transformation ratio required to obtain the first power supply signal after voltage regulation of the first voltage signal, which is conducive to improving voltage regulation efficiency and reducing losses.

[0100] In one embodiment, the power management circuit 10 further includes: a first voltage stabilizing module, connected to the first voltage regulating module 120 and the first load, respectively, for stabilizing the first power supply signal and outputting it to the corresponding first load; a second voltage stabilizing module, connected to the second voltage regulating module 130 and the second load, respectively, for stabilizing the second power supply signal and outputting it to the corresponding second load. The first voltage stabilizing module and the second voltage stabilizing module can further achieve the stability of the power supply of the power management circuit 10. The first voltage stabilizing module and the second voltage stabilizing module can be, for example, a low dropout linear regulator (LDO).

[0101] It can be understood that the power management circuit 10 formed by combining one or more of the above embodiments can integrate a power management chip according to actual needs to improve integration and reduce the overall occupied space and area.

[0102] The present embodiment also provides a charge pump conversion module, comprising: an energy storage switching unit, used to receive a first voltage signal; a voltage conversion unit, used to be connected to the energy storage switching unit and an external first voltage regulation module respectively; wherein: when the first voltage signal is within a first voltage range, the energy storage switching unit is used to transmit the received first voltage signal to the voltage conversion unit, so that the voltage conversion unit performs conversion processing on the first voltage signal with a preset transformation ratio, obtains a second voltage signal and outputs it to the first voltage regulation module; when the first voltage signal is within a second voltage range, the energy storage switching unit is in an energy storage state, so as to be used together with the voltage conversion unit to convert the first voltage signal to a preset voltage; the minimum value of the first voltage range is greater than or equal to the maximum value of the second voltage range; the first voltage regulation module is used to perform voltage regulation processing on the second voltage signal, obtain a first power supply signal, and supply power to the first load.

[0103] For the energy storage switching unit, voltage conversion unit, first voltage regulation module, etc. involved in this embodiment, please refer to the relevant description in the above embodiments and will not be repeated here.

[0104] The charge pump conversion module of this embodiment can support the ratio conversion mode, the voltage regulation mode and the switching function of the two modes through the energy storage switching unit and the voltage conversion unit, so as to efficiently convert and process the first voltage signal and obtain a second voltage signal that is more suitable for the regulation and processing of the first voltage regulation module. On the one hand, since the energy storage switching unit and the voltage conversion unit have performed matching target conversion processing on the first voltage signal, and the target conversion processing can obtain a second voltage signal suitable for transient voltage drop under high power load and the transient response of the first voltage regulation module itself on the basis of efficient conversion, it is convenient for the first voltage regulation module to perform voltage regulation processing more efficiently. Therefore, the first voltage regulation module only needs a lower ratio to process and obtain the first power supply signal more efficiently. In particular, when the first voltage regulation module works in the light load area, its loss is mainly switching loss, and the switching loss can be greatly reduced when the input voltage is low. Therefore, the power management circuit can greatly improve the power supply efficiency of the low-voltage core power supply, greatly reduce the heat loss of the whole machine, and improve the endurance of the whole machine.

[0105] The present application also provides a power management method. In one embodiment, Fig.10 As shown, the power management method includes: step 112 to step 114.

[0106] Step 112: Control the charge pump conversion module to perform target conversion processing on the received first voltage signal to obtain a second voltage signal.

[0107] Step 114: Control the first voltage regulating module to perform voltage regulation processing on the second voltage signal to obtain a first power supply signal to supply power to the first load.

[0108] Among them, the target conversion processing includes at least one of a first conversion processing and a second conversion processing, the first conversion processing is used to convert the first voltage signal into a preset ratio when the first voltage signal is in a first voltage range, and the second conversion processing is used to convert the first voltage signal to a preset voltage when the first voltage signal is in a second voltage range, and the minimum value of the first voltage range is greater than or equal to the maximum value of the second voltage range.

[0109] Among them, step 112 and step 114 can be executed by the control module in the above embodiment. The control module controls the working states of the charge pump conversion module and the first voltage regulation module accordingly by controlling the various switches in the charge pump conversion module and the first voltage regulation module. The relevant contents of each feature in this embodiment can refer to the relevant introduction of the above embodiment and will not be repeated here.

[0110] The power management method provided in this embodiment can obtain the first power supply signal by controlling the charge pump conversion module to perform target conversion processing on the first voltage signal to obtain the second voltage signal, and then controlling the first voltage regulation module to perform voltage regulation processing on the second voltage signal. On the one hand, since the charge pump conversion module has performed matching target conversion processing on the first voltage signal, and the target conversion processing can obtain a second voltage signal suitable for transient voltage drop under high-power load and the transient response of the first voltage regulation module itself on the basis of efficient conversion, it is convenient for the first voltage regulation module to perform voltage regulation processing more efficiently. Therefore, the first voltage regulation module only needs a lower transformation ratio to more efficiently process and obtain the first power supply signal. In particular, when the first voltage regulation module works in the light load area, its loss is mainly switching loss, and the switching loss can be greatly reduced when the input voltage is low. Therefore, the power management circuit can greatly improve the power supply efficiency of the low-voltage core power supply, greatly reduce the heat loss of the whole machine, and improve the endurance of the whole machine.

[0111] In one embodiment, the power management method includes: step 116.

[0112] Step 116: Control the second voltage regulating module to perform voltage regulation processing on the received first voltage signal to obtain a second power supply signal to supply power to the second load.

[0113] Among them, step 116 can be executed by the control module in the above embodiment. The control module controls the working state of the second voltage regulation module accordingly by controlling each switch in the second voltage regulation module. The relevant contents of each feature in this embodiment can refer to the relevant introduction of the above embodiment, which will not be repeated here.

[0114] The present application also provides a power supply module. In one embodiment, as Fig.12 As shown, the power supply module includes: a power supply module 40, which is used to provide a first voltage signal; and a power management circuit 10 ( Fig.12 Taking the power management circuit 10 as an example, or the charge pump conversion module of the above embodiment. The power supply module is based on the power management circuit 10 or the charge pump conversion module of the above embodiment, which can greatly improve the power supply efficiency of low-voltage core power supply, such as the power supply efficiency of low-voltage loads such as CPU and Memory, especially the power supply efficiency under light load, greatly reduce the heat loss of the whole machine, and improve the endurance of the whole machine.

[0115] In one embodiment, the power supply module 40 includes: a first battery unit including a single battery cell for providing a first voltage signal; or Fig.13 As shown, it includes: a second battery unit 410, including a plurality of battery cells connected in series, for providing a power signal; and a charge pump conversion unit 420, connected to the second battery unit 410 and the charge pump conversion module 110, for converting the power signal into a first voltage signal.

[0116] Among them, the first battery unit is used to directly provide a single-cell voltage VPH_PWR1 to the power management circuit 10 for conversion processing by the power management circuit 10. The second battery unit 410 is used to provide a multi-cell voltage. After the multi-cell voltage is converted by the charge pump conversion unit, it is reduced to a single-cell voltage VPH_PWR1, and then converted by the power management circuit 10 to supply power to each load. The charge pump conversion unit 420 is used to convert the power signal with a preset ratio. For example, a 1 / 2 ratio can be used to convert a 2VPH_PWR power signal into a first voltage signal of VPH_PWR1. It can be understood that when the second battery unit 410 is n cells in series, the charge pump conversion unit 420 can support a conversion process with a 1 / n ratio.

[0117] The present application also provides an electronic device, comprising a first load and a power supply module as described in the above embodiment. The electronic device has lower heat loss and higher overall battery life.

[0118] The electronic devices involved in the embodiments of the present application may be handheld devices, vehicle-mounted devices, smart cars, wearable devices, computing devices, and various forms of user equipment (UE) (e.g., mobile phones), mobile stations (MS), etc. Fig.14 As shown, further, the above electronic device is taken as a mobile phone 11 as an example for explanation, specifically, Fig.14As shown, the mobile phone 11 may include a memory 21 (which may optionally include one or more computer-readable storage media), a processor 22, a peripheral device interface 23, a radio frequency system 24, and an input / output (I / O) subsystem 26. These components may communicate via one or more communication buses or signal lines 29. Those skilled in the art will appreciate that Fig.14 The illustrated mobile phone 11 does not constitute a limitation of the mobile phone, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently. Fig.14 The various components shown in the EMBODIMENTS 2000 are implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application specific integrated circuits.

[0119] The memory 21 optionally includes a high-speed random access memory, and optionally also includes a non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplarily, the software components stored in the memory 21 include an operating system 211, a communication module (or an instruction set) 212, a global positioning system (GPS) module (or an instruction set) 213, etc.

[0120] The processor 22 and other control circuits may be used to control the operation of the handset 11. The processor 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, and the like.

[0121] The processor 22 may be configured to implement a control algorithm for controlling the use of an antenna in the handset 11. The processor 22 may also issue control commands for controlling switches in the radio frequency system 24, etc.

[0122] The I / O subsystem 26 couples input / output peripherals on the mobile phone 11, such as a keypad and other input control devices, to the peripheral device interface 23. The I / O subsystem 26 optionally includes a touch screen, buttons, tone generators, accelerometers (motion sensors), ambient light sensors and other sensors, light emitting diodes and other status indicators, data interfaces, etc. Exemplarily, a user can control the operation of the mobile phone 11 by supplying commands via the I / O subsystem 26, and can use the output resources of the I / O subsystem 26 to receive status information and other output from the mobile phone 11. For example, a user can press button 261 to turn the mobile phone on or off.

[0123] Any reference to memory, storage, database or other media used in this application may include non-volatile and / or volatile memory. Suitable non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RM), which is used as an external cache memory. As an illustration and not limitation, RM is available in various forms, such as static RM (SRM), dynamic RM (DRM), synchronous DRM (SDRM), double data rate SDRM (DDR SDRM), enhanced SDRM (ESDRM), synchronous link (Synchlink) DRM (SLDRM), memory bus (Rmbus) direct RM (RDRM), direct memory bus dynamic RM (DRDRM) and memory bus dynamic RM (RDRM).

[0124] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0125] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A power management circuit, characterized in that: include: A charge pump conversion module, used to support target conversion processing of the received first voltage signal to obtain a second voltage signal; a first voltage regulating module, connected to the output end of the charge pump conversion module, and configured to perform voltage regulation processing on the second voltage signal to obtain a first power supply signal to supply power to the first load; Among them, the target conversion processing includes at least one of a first conversion processing and a second conversion processing, the first conversion processing is used to convert the first voltage signal with a preset ratio when the first voltage signal is in a first voltage range, and the second conversion processing is used to convert the first voltage signal to a preset voltage when the first voltage signal is in a second voltage range, and the minimum value of the first voltage range is greater than or equal to the maximum value of the second voltage range.

2. The power management circuit according to claim 1, characterized in that: The target conversion process includes a first conversion process and a second conversion process, and the charge pump conversion module includes: An energy storage switching unit, configured to receive the first voltage signal; A voltage conversion unit, used to be connected to the energy storage switching unit and the first voltage regulation module respectively; wherein: When the first voltage signal is within the first voltage range, the energy storage switching unit is used to transmit the received first voltage signal to the voltage conversion unit, so that the voltage conversion unit performs a first conversion process on the first voltage signal; When the first voltage signal is within the second voltage range, the energy storage switching unit is in an energy storage state, so as to be used together with the voltage conversion unit to perform a second conversion process on the first voltage signal.

3. The power management circuit according to claim 2, characterized in that: The energy storage switching unit comprises: an inductor and a common switch, wherein a first end of the inductor is connected to a first end of the common switch to input the first voltage signal, and a second end of the inductor is connected to a second end of the common switch and the voltage conversion unit respectively; Wherein, when the common switch is in the on state, the energy storage switching unit transmits the first voltage signal to the voltage conversion unit; when the common switch is in the off state, the energy storage switching unit is in the energy storage state.

4. The power management circuit according to claim 2, characterized in that: The voltage conversion unit comprises: A first capacitor, a second capacitor, a load capacitor and a plurality of switches, wherein the plurality of switches are used to switch between different on-off states, so that the energy storage switching unit, the first capacitor, the second capacitor and the load capacitor are in different connection states.

5. The power management circuit according to claim 4, characterized in that: The plurality of switches include a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch and an eighth switch; The first end of the first switch is respectively connected to the first end of the fifth switch and the energy storage switching unit, the second end of the first switch is respectively connected to the first end of the second switch and the first end of the first capacitor, the second end of the second switch is respectively connected to the first end of the third switch, the first end of the load capacitor, the second end of the sixth switch, and the first end of the seventh switch, the second end of the third switch is respectively connected to the second end of the first capacitor and the first end of the fourth switch, the second end of the fifth switch is respectively connected to the first end of the second capacitor and the first end of the sixth switch, the second end of the seventh switch is respectively connected to the first end of the eighth switch and the second end of the second capacitor, the second end of the fourth switch, the second end of the load capacitor, and the second end of the eighth switch are respectively connected to the equivalent ground end; wherein, the second voltage signal is output at the first end of the load capacitor.

6. The power management circuit according to claim 1, characterized in that: The target conversion process includes a first conversion process, and the charge pump conversion module includes: A first capacitor, a second capacitor, a load capacitor and a plurality of switches, wherein the plurality of switches are used to switch between different on-off states, so that the first capacitor, the second capacitor and the load capacitor are in different connection states.

7. The power management circuit according to any one of claims 1 to 6, characterized in that: There are multiple first voltage regulating modules, and the multiple first voltage regulating modules are respectively connected to multiple first loads.

8. The power management circuit according to any one of claims 1 to 6, characterized in that: Also includes: The second voltage regulating module is connected to the input end of the charge pump conversion module and is used to perform voltage regulation processing on the received first voltage signal to obtain a second power supply signal to supply power to a second load.

9. A charge pump conversion module, characterized in that: include: An energy storage switching unit, configured to receive a first voltage signal; A voltage conversion unit is used to be connected to the energy storage switching unit and an external first voltage regulation module respectively; wherein: When the first voltage signal is within the first voltage range, the energy storage switching unit is used to transmit the received first voltage signal to the voltage conversion unit, so that the voltage conversion unit performs a conversion process of the first voltage signal with a preset transformation ratio, obtains a second voltage signal and outputs it to the first voltage regulation module; when the first voltage signal is within the second voltage range, the energy storage switching unit is in an energy storage state, so as to be used together with the voltage conversion unit to convert the first voltage signal to a preset voltage; The minimum value of the first voltage range is greater than or equal to the maximum value of the second voltage range; the first voltage regulation module is used to perform voltage regulation processing on the second voltage signal to obtain a first power supply signal to supply power to the first load.

10. A power supply module, characterized in that: include: A power supply module, used for providing a first voltage signal; and A power management circuit as claimed in any one of claims 1 to 8, or a charge pump conversion module as claimed in claim 9.

11. The power supply module according to claim 10, characterized in that: The power supply module comprises: A first battery unit, comprising a single battery cell, for providing the first voltage signal; or A second battery unit includes a plurality of battery cells connected in series and is used to provide a power signal; and a charge pump conversion unit is connected to the battery unit and the charge pump conversion module and is used to convert the power signal into the first voltage signal.

12. An electronic device, characterized in that: include: First load; and A power supply module as described in any one of claims 10-11.

13. A power management method, characterized in that: include: Controlling the charge pump conversion module to perform target conversion processing on the received first voltage signal to obtain a second voltage signal; Controlling the first voltage regulating module to perform voltage regulation processing on the second voltage signal to obtain a first power supply signal to supply power to the first load; Among them, the target conversion processing includes at least one of a first conversion processing and a second conversion processing, the first conversion processing is used to convert the first voltage signal with a preset ratio when the first voltage signal is in a first voltage range, and the second conversion processing is used to convert the first voltage signal to a preset voltage when the first voltage signal is in a second voltage range, and the minimum value of the first voltage range is greater than or equal to the maximum value of the second voltage range.

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