Power management module, display module, power chip and electronic equipment

Abstract

The invention provides a power management module, a display module, a power chip and electronic equipment. The power supply management module comprises a power supply chip, a first power conversion circuit and a second power conversion circuit, the power supply chip is used for being connected with a power supply, and the power supply chip comprises a controller; one end of the first power conversion circuit and one end of the second power conversion circuit are respectively connected with the controller, and the other end of the first power conversion circuit and the other end of the second power conversion circuit are respectively connected with a load; the maximum output power of the first power conversion circuit is smaller than that of the second power conversion circuit; each power conversion circuit is used for converting the voltage output by the power supply; the controller is used for receiving load demand voltage of the load and obtaining load current, the first power conversion circuit or the second power conversion circuit is controlled to work according to the load demand voltage and the load current, and the load current is current output to the load by the power management module. High power and high efficiency can be considered.

Description

[0001] This application is a divisional application. The original application has the application number 202411083228.1 and the original application date is August 7, 2024. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of display, and more particularly to a power management module, a display module, a power chip, and an electronic device. Background Technology

[0003] With advancements in materials and technology, the weight and size of display panels in various electronic devices are gradually decreasing. Types of display panels include liquid crystal displays (LCDs), field emission displays (FETs), plasma display panels, and organic light-emitting diode (OLED) displays. OLED displays are characterized by fast response times, excellent color purity and brightness, high contrast, and wide viewing angles. Typically, OLED displays include active-matrix OLEDs (AMOLEDs). AMOLEDs drive light-emitting diodes through driving circuits, enabling large sizes and high resolutions, and have promising development prospects.

[0004] AMOLED displays consist of pixels arranged in a matrix. Each pixel contains an organic electroluminescent (OEL) element that is driven to emit light under a specific voltage. Higher brightness and larger size AMOLED displays require higher power and a greater number of OEL elements, consequently increasing the power demand on the power supply (EL power supply) that provides the positive and negative voltages to these OEL elements. Furthermore, the EL power supply accounts for the largest proportion of power in large-size, high-brightness AMOLED displays; therefore, the efficiency of the EL power supply determines the overall power efficiency of the AMOLED display.

[0005] Large-size AMOLED displays can be used in various electronic devices such as large-screen mobile phones, tablets, laptops, and desktop computers. Currently, some AMOLED displays meet the power requirements of the devices and achieve current sharing by setting up two symmetrical power conversion circuits in the EL power supply. However, the EL power supply in these devices cannot simultaneously achieve high power and high efficiency. Summary of the Invention

[0006] This application provides a power management module, a display module, a power chip, and an electronic device that can balance high power and high efficiency.

[0007] In a first aspect, this application provides a power management module, which includes a power chip, a first power conversion circuit, and a second power conversion circuit. The power chip is used to connect to a power supply and includes a controller. One end of the first power conversion circuit and one end of the second power conversion circuit are respectively connected to the controller, and the other ends of the first and second power conversion circuits are respectively used to connect to a load. The maximum output power of the first power conversion circuit is less than the maximum output power of the second power conversion circuit. Both the first and second power conversion circuits are used to convert the voltage output by the power supply. The controller is used to receive the load demand voltage and obtain the load current, and control the first or second power conversion circuit to operate according to the magnitude of the load demand voltage and the load current. The load current is the current output from the power management module to the load. The power conversion circuit may include a DC-DC converter. For example, the power conversion circuit may be an inverting Buck-Boost circuit, i.e., a buck-boost converter circuit that generates negative voltage, used to convert the positive voltage provided by the power supply into a negative voltage and output it for the load.

[0008] In this application, the first power conversion circuit and the second power conversion circuit have different maximum output powers, thus their power output capabilities differ. The power conversion circuit with lower power output capability (referring to the first power conversion circuit) includes switches with better dynamic parameters, lower switching losses and drive losses, resulting in higher power efficiency when controlling the first power conversion circuit under light loads. The power conversion circuit with higher power output capability (referring to the second power conversion circuit) includes switches with lower on-resistance, resulting in lower on-resistance when controlling the second power conversion circuit under heavy loads, allowing it to support higher output power. By setting power conversion circuits with different power output capabilities and adjusting the operation of appropriate power conversion circuits according to the actual load demand voltage and load current, different load requirements can be met. This ensures that the final output voltage and power of the power management module meet the load requirements while maintaining high power efficiency, balancing high efficiency and high output power.

[0009] In one feasible implementation, the controller described above is used for:

[0010] When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is greater than or equal to the voltage threshold, or when the load current is greater than or equal to the first current threshold, the second power conversion circuit is controlled to operate.

[0011] In this application, since the maximum output power of the first power conversion circuit and the second power conversion circuit is different, it indicates that their power output capabilities are different. Therefore, the maximum current or maximum voltage that the devices in the two circuits can withstand during operation is also different. When the load demand voltage and load current are small, the first power conversion circuit operates, and the circuit is in a light-load state. Because the current-carrying capacity and voltage withstand capability of the devices in the first power conversion circuit are smaller, the power supply efficiency is higher under light-load conditions. When the load demand voltage or load current is large, the second power conversion circuit operates, and the circuit may be in a medium-load or heavy-load state. Compared with the first power conversion circuit, the second power conversion circuit has a larger current-carrying capacity and a larger voltage withstand capability, resulting in higher power supply efficiency under medium-load or heavy-load conditions. Simultaneously, controlling the first power conversion circuit to operate when the voltage and current are low, and controlling it to not operate when the voltage or current is high, can protect the devices in the first power conversion circuit.

[0012] In one feasible implementation, both the first power conversion circuit and the second power conversion circuit include a switching transistor and an inductor. The inductors in both the first and second power conversion circuits are located outside the power supply chip. The switching transistor in the first power conversion circuit is integrated into the power supply chip, and the switching transistor in the second power conversion circuit is located outside the power supply chip.

[0013] In this application, the switching transistors in the first power conversion circuit are integrated into the power supply chip, allowing for the selection of transistors with good dynamic parameters and reduced switching losses. The switching transistors in the second power conversion circuit are located outside the power supply chip, allowing for the selection of transistors with low on-resistance, reducing heat generation and increasing output power. Correspondingly, the first power conversion circuit is controlled under light load conditions, improving power efficiency under light load. The second power conversion circuit is controlled under heavy load conditions, increasing output power. This achieves a balance between high efficiency and high output power, adapting to various application scenarios.

[0014] In one feasible implementation, the power management module further includes a third power conversion circuit, the maximum output power of which is greater than or equal to the maximum output power of the second power conversion circuit; the inductor and switching transistor in the third power conversion circuit are located outside the power chip; the controller is specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the second current threshold, the second power conversion circuit is controlled to operate. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the second current threshold, the second power conversion circuit is controlled to operate. When the load current is greater than or equal to the second current threshold, the second power conversion circuit and the third power conversion circuit are controlled to operate. The second current threshold is greater than the first current threshold.

[0015] In this application, by setting up a low-power phase built into the switching transistor (referring to the first power conversion circuit) and two high-power phases externally connected to the switching transistor (including the second power conversion circuit and the third power conversion circuit), the low-power phase can be controlled to work alone, the high-power phase can work alone, and the two high-power phases can work in parallel, depending on the load demand voltage and load current. This can meet the load requirements for light load, medium load, and heavy load conditions respectively. It improves power efficiency under light load conditions and provides greater output power under heavy load conditions, thereby meeting the needs of different scenarios and achieving a balance between high efficiency and high power.

[0016] In one feasible implementation, the power management module further includes a fourth power conversion circuit. The maximum output power of the fourth power conversion circuit is greater than or equal to the maximum output power of the first power conversion circuit, and less than the maximum output power of the second power conversion circuit. The inductor in the fourth power conversion circuit is located outside the power chip, and the switching transistor in the fourth power conversion circuit is integrated into the power chip. The controller is specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the third current threshold, the first power conversion circuit and the fourth power conversion circuit are controlled to operate. When the load current is greater than or equal to the third current threshold, the first power conversion circuit and the fourth power conversion circuit are controlled to stop working, and the second power conversion circuit is controlled to work. When the load demand voltage is greater than or equal to the voltage threshold, the second power conversion circuit is controlled to operate. The third current threshold is greater than the first current threshold.

[0017] In this application, by setting up two low-power phases built into the switching transistors (referring to the first power conversion circuit and the fourth power conversion circuit) and a high-power phase externally mounted on the switching transistors (including the second power conversion circuit), the system controls one low-power phase to work alone, two low-power phases to work together, and the high-power phase to work alone, depending on the load demand voltage and load current. This can meet the load requirements for light load, medium load, and heavy load conditions respectively. It improves power efficiency under light load and medium load conditions and provides greater output power under heavy load conditions, thereby meeting the needs of different scenarios and achieving a balance between high efficiency and high power.

[0018] In one feasible implementation, both the first power conversion circuit and the second power conversion circuit include a switching transistor and an inductor, and the switching transistor and the inductor in both the first power conversion circuit and the second power conversion circuit are located outside the aforementioned power chip.

[0019] In this application, since the switching transistors in both the first and second power conversion circuits are located outside the power supply chip, each power conversion circuit can use switching transistors with lower on-resistance. This results in better heat dissipation and stronger load-carrying capacity during operation. Different power conversion circuits can be controlled to operate under varying load requirements and currents. For example, the first power conversion circuit can be controlled under light load conditions, while the second power conversion circuit can be controlled under heavy load conditions. This improves power efficiency under light load conditions and increases output power under heavy load conditions.

[0020] In one feasible implementation, the power management module further includes a fifth power conversion circuit, the maximum output power of which is greater than or equal to the maximum output power of the second power conversion circuit; the switching transistor and inductor in the fifth power conversion circuit are located outside the power chip; the controller is specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the fourth current threshold, the second power conversion circuit is controlled to operate, and the fourth current threshold is greater than the first current threshold. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the fourth current threshold, the second power conversion circuit is controlled to operate. When the load current is greater than or equal to the fourth current threshold, the second power conversion circuit and the fifth power conversion circuit are controlled to operate.

[0021] In this application, by controlling the low-power phase to work alone, the high-power phase to work alone, or the two high-power phases to work together according to the load demand voltage and load current, the load demand can be met for different load conditions. The power supply efficiency is improved under light load conditions, and a larger output power is provided under heavy load conditions. The overall current output capability and voltage output capability are improved, thereby meeting the needs of different scenarios and achieving a balance between high efficiency and high power.

[0022] In one feasible implementation, both the first power conversion circuit and the second power conversion circuit include a switching transistor and an inductor. The inductors in both the first power conversion circuit and the second power conversion circuit are located outside the power supply chip, while the switching transistors in both the first power conversion circuit and the second power conversion circuit are integrated into the power supply chip.

[0023] In this application, since the switching transistors in both the first and second power conversion circuits are integrated into the power supply chip, the appropriate power conversion circuits can be controlled separately under different load conditions, ensuring high operating efficiency for each power conversion circuit. Furthermore, by controlling the operating states of the first and second power conversion circuits according to the load demand voltage and load current, the control is more precise, allowing for more refined design of the switching transistor parameters and ultimately higher efficiency.

[0024] In one feasible implementation, the power management module further includes a sixth power conversion circuit, the maximum output power of which is greater than or equal to the maximum output power of the second power conversion circuit; the inductor in the sixth power conversion circuit is located outside the power chip, and the switching transistor in the sixth power conversion circuit is also integrated into the power chip; the controller is specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the fifth current threshold, the second power conversion circuit is controlled to operate, and the fifth current threshold is greater than the first current threshold. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the fifth current threshold, the second power conversion circuit is controlled to operate. When the load current is greater than or equal to the fifth current threshold, the second power conversion circuit and the sixth power conversion circuit are controlled to operate.

[0025] In this application, by controlling the low-power phase to operate alone, the high-power phase to operate alone, or both high-power phases to operate together, based on the load demand voltage and load current, different load conditions can be met, allowing for more precise control under various load states and improving efficiency. Simultaneously, the switching transistor parameters in each power conversion circuit can be designed more precisely, further enhancing efficiency. In one feasible implementation, the aforementioned first current threshold is determined based on the maximum current-carrying capacity of the switching transistor in the first power conversion circuit, and the aforementioned voltage threshold is determined based on the maximum withstand voltage capacity of the switching transistor in the first power conversion circuit.

[0026] In this application, by setting appropriate first current threshold and voltage threshold, the first power conversion circuit is less prone to overcurrent and overvoltage during operation, thereby protecting the device and improving the circuit's safety.

[0027] In one feasible implementation, the on-resistance of the switching transistor in the first power conversion circuit is greater than a first threshold.

[0028] In this application, the switching transistor in the power conversion circuit integrated into the power chip does not operate under heavy load and does not need to meet a large current carrying capacity. Therefore, a switching transistor with a larger on-resistance than conventional switching transistors can be selected. This switching transistor has better dynamic parameters, which can significantly reduce the switching losses and drive losses of the first power conversion circuit when operating under light load conditions, thereby improving the power efficiency under light load conditions. At the same time, since the switching transistor in the first power conversion circuit does not require additional packaging, the area of ​​the power management module can be reduced while improving efficiency.

[0029] In one feasible implementation, the on-resistance of the switching transistor in the second power conversion circuit is less than a second threshold, and the second threshold is less than the first threshold.

[0030] In this application, the switching transistor located outside the power supply chip does not operate under light load conditions, eliminating the need to consider switching losses. Therefore, a switching transistor with a lower on-resistance than conventional ones can be selected. This transistor has larger dynamic parameters and a more favorable on-resistance, resulting in lower on-resistance, reduced heat generation, and improved current carrying capacity during the operation of the second power conversion circuit. Furthermore, since the switching transistor in the second power conversion circuit is located outside the power supply chip, it has a separate package compared to integrated switching transistors, leading to better heat dissipation and potentially higher output power.

[0031] In one feasible implementation, the load includes a display device, and each of the power conversion circuits is used to provide a negative voltage power supply to the display device.

[0032] Secondly, this application also provides a display module, which includes a power management module and a display device as described in the first aspect and any feasible implementation thereof. The input terminal of the power management module is used to connect to a power supply, and the output terminal of the power management module is used to connect to the display device. The power management module is used to convert the voltage provided by the power supply and output it to the display device.

[0033] Thirdly, this application also provides a power supply chip, which includes a controller. The power supply chip is used to connect to a power source, and the controller is used to connect one end of a first power conversion circuit and one end of a second power conversion circuit. The maximum output power of the first power conversion circuit is less than the maximum output power of the second power conversion circuit. The other ends of the first and second power conversion circuits are used to connect to a load. Both the first and second power conversion circuits are used to convert the voltage output by the power source. The controller is used to: The system receives the load demand voltage and obtains the load current. Based on the load demand voltage and load current, it controls the first power conversion circuit or the second power conversion circuit to operate. The load current is the current received by the load.

[0034] In one feasible implementation, the controller is used to: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate.

[0035] When the load demand voltage is greater than or equal to a voltage threshold, or when the load current is greater than or equal to a first current threshold, the second power conversion circuit is controlled to operate. In one feasible implementation, the controller is further configured to connect one end of a fifth power conversion circuit, the other end of which is configured to connect to the load, wherein the maximum output power of the fifth power conversion circuit is greater than or equal to the maximum output power of the second power conversion circuit; the controller is configured to: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the fourth current threshold, the second power conversion circuit is controlled to operate, wherein the fourth current threshold is greater than the first current threshold. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the fourth current threshold, the second power conversion circuit is controlled to operate. When the load current is greater than or equal to the fourth current threshold, the second power conversion circuit and the fifth power conversion circuit are controlled to operate.

[0036] Fourthly, this application also provides an electronic device, which includes a power management module as described in the first aspect and any feasible implementation thereof, a display module as described in the second aspect, or a power chip as described in the third aspect and any feasible implementation thereof. Attached Figure Description

[0037] Figure 1 A schematic diagram of the power management module provided in an embodiment of this application; Figure 2 A flowchart illustrating the control method provided in an embodiment of this application; Figure 3 Another schematic flowchart of the control method provided in the embodiments of this application; Figure 4 This is another structural schematic diagram of the power management module provided in an embodiment of this application; Figure 5 Another structural schematic diagram of the power management module provided in the embodiments of this application; Figure 6 Another structural schematic diagram of the power management module provided in the embodiments of this application; Figure 7 Another structural schematic diagram of the power management module provided in the embodiments of this application; Figure 8 Another structural schematic diagram of the power management module provided in the embodiments of this application; Figure 9 Another structural schematic diagram of the power management module provided in the embodiments of this application; Figure 10 Another structural schematic diagram of the power management module provided in the embodiments of this application; Figure 11 A schematic diagram of the structure of a power chip provided in an embodiment of this application; Figure 12 This is a schematic diagram of the structure of a display module provided in an embodiment of this application; Figure 13 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described below with reference to the accompanying drawings.

[0039] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0040] It should be understood that in this application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three or more, and "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0041] The power management module, display module, and power chip provided in this application can be applied in the field of terminal communication and used in various displays. The electronic devices provided in this application can include various devices with display screens, such as large-screen mobile phones, tablets, laptops, desktop computers, etc.

[0042] The following is combined Figures 1-11 This application provides an introduction to the power management module, display module, power chip, and electronic devices provided.

[0043] See Figure 1 , Figure 1 This is a schematic diagram of the power management module provided in an embodiment of this application. Figure 1 As shown, the power management module may include a power chip, a first power conversion circuit (such as...) Figure 1 The power conversion circuit 1) and the second power conversion circuit (such as) Figure 1The power conversion circuit 2 in the circuit is included. A power chip is used to connect to a power source, and the power chip includes a controller. One end of the first power conversion circuit and one end of the second power conversion circuit are respectively connected to the controller, and the other ends of the first and second power conversion circuits are respectively used to connect to loads. The maximum output power of the first power conversion circuit is less than the maximum output power of the second power conversion circuit.

[0044] In other words, the power management module includes a power chip and multiple power conversion circuits. Each power conversion circuit is connected to a controller in the power chip. The output of each power conversion circuit is used to connect to a load; at least two of the multiple power conversion circuits have different maximum output powers; wherein, the maximum output power of the first power conversion circuit is less than the maximum output power of the second power conversion circuit.

[0045] Both the first and second power conversion circuits are used to convert the voltage output by the power supply to power the load; these power conversion circuits may include direct current (DC) to direct current (DC) circuits. For example, the power conversion circuit may be an inverting buck-boost circuit, that is, a buck-boost converter circuit that generates negative voltage, used to convert the positive voltage provided by the power supply into a negative voltage and output it for the load.

[0046] In one possible implementation, the load may include a display device, and each of the power conversion circuits is used to provide a negative voltage power supply to the display device. Figure 1 The example uses this load as a display device. The aforementioned power chip, first power conversion circuit, and second power conversion circuit can form... Figure 1 The example ELVSS power supply. (e.g.) Figure 1 As shown, the power management module may also include an ELVDD power supply, which can be used to provide a positive voltage to the display device.

[0047] Understandably, in this power management module, the maximum output power of the first power conversion circuit is less than that of the second power conversion circuit. The difference in maximum output power indicates that these power conversion circuits have different power output capabilities; some can output less power, while others can output more. By setting these power conversion circuits with different power output capabilities in the power management module, it is possible to adapt to various application scenarios and provide suitable power supply for loads with different needs.

[0048] The controller in the power management module can be used to receive the load demand voltage and obtain the load current, and control the first power conversion circuit or the second power conversion circuit to work according to the load demand voltage and load current. The load current is the current output by the power management module to the load.

[0049] The load voltage requirement can be obtained through software, eliminating the need for hardware detection and simplifying the control process. In other words, the controller can receive the load's required voltage amplitude.

[0050] The load current can be the load current obtained from the ELVDD power supply in the power management module. This allows the existing current detection circuit in the power management module to be reused, eliminating the need to design additional current detection circuits for different power conversion circuits in the ELVDD power supply. This simplifies circuit design and reduces size.

[0051] In other words, the power management module provided in this application can adjust the operation of different power conversion circuits according to actual conditions. When the load demand changes, the operating power conversion circuit adjusts accordingly, thereby ensuring that the final output voltage of the power management module meets the load demand. Adjusting the operating power conversion circuit according to the load demand voltage and load current ensures that the devices in the power conversion circuit can operate safely within their capabilities, thus maintaining high power efficiency. In other words, by selecting a suitable power conversion circuit based on the load demand voltage and load current, both high operating efficiency and output power requirements can be met.

[0052] In one possible implementation, the controller in the power management module can be used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to work. The second power conversion circuit is controlled to operate when the load demand voltage is greater than or equal to the voltage threshold, or when the load current is greater than or equal to the first current threshold.

[0053] The first current threshold can be determined based on the maximum current carrying capacity of the switching transistor in the first power conversion circuit, and the voltage threshold can be determined based on the maximum withstand voltage of the switching transistor in the first power conversion circuit.

[0054] Here, since the power conversion circuit mentioned in this application converts the positive voltage supplied by the power source into a negative voltage, "the load demand voltage is greater than or equal to the voltage threshold" can refer to the absolute value of the load demand voltage being greater than or equal to the voltage threshold. In the following text, when comparing the load demand voltage with the voltage threshold, it can be understood as comparing the absolute value of the load demand voltage with the voltage threshold.

[0055] Specifically, the first current threshold must be less than the maximum current-carrying capacity of the switching transistor in the first power conversion circuit. Additionally, the optimal efficiency point can be calculated by combining the dynamic parameters and on-resistance of the switching transistor to determine the first current threshold. During the operation of the first power conversion circuit, its efficiency first increases and then decreases with the increase of load current. Therefore, the load current value before this efficiency inflection point can be selected as the first current threshold, resulting in higher efficiency. This first current threshold can be modified using software to suit different application scenarios and adapt to different electronic devices. The aforementioned voltage threshold must be less than the maximum withstand voltage of the switching transistor in the first power conversion circuit. This voltage threshold is pre-designed and cannot be modified by the user using the power control module. This ensures that the switching transistor in the first power conversion circuit will not operate when the load current or the load demand voltage is too high, minimizing the possibility of damage. For example, the load demand voltage can be in the range of -16V to 0V, the first current threshold can be in the range of 100 to 800mA, and the voltage threshold can be in the range of 4V to 12V. When the absolute value of the load demand voltage is greater than or equal to the voltage threshold, it indicates that the load demand voltage is large. When the absolute value of the load voltage requirement is less than the voltage threshold, it indicates that the load voltage requirement is low.

[0056] In this embodiment, since the maximum output power of the first power conversion circuit and the second power conversion circuit is different, it indicates that their power output capabilities are different. Therefore, the maximum current or maximum voltage that the devices in the two circuits can withstand during operation is also different. That is, the maximum current (which can be called current carrying capacity) and the maximum voltage (which can be called withstand voltage) that the devices in the two power conversion circuits can withstand are different.

[0057] For the first power conversion circuit, the maximum current and the maximum voltage that the devices in the circuit can withstand are relatively small.

[0058] Therefore, when the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit can be controlled to operate, thus ensuring that the components in the first power conversion circuit are not easily damaged during operation. When the load demand voltage is higher (greater than or equal to the voltage threshold) or the load current is higher (greater than or equal to the first current threshold), the first power conversion circuit is controlled to stop operating, and the second power conversion circuit is controlled to operate, reducing the possibility of damage to the components in the first power conversion circuit, achieving component protection, and improving operational reliability. On the other hand, when the load demand voltage and load current are low, the first power conversion circuit operates, and the circuit is in a light load state. Because the components in the first power conversion circuit have lower current-carrying capacity and lower voltage withstand capability, the power supply efficiency is higher under light load conditions. When the load demand voltage or load current is high, the second power conversion circuit operates, and the circuit may be in a medium or heavy load state. Compared with the first power conversion circuit, the components in the second power conversion circuit have higher current-carrying capacity and higher voltage withstand capability, resulting in higher power supply efficiency under medium or heavy load conditions.

[0059] In this way, by adjusting the power conversion circuit according to the load demand voltage and load current, it can not only meet the load demand, but also improve power efficiency and protect the circuit components.

[0060] Furthermore, since the first power conversion circuit and the second power conversion circuit do not operate simultaneously, there is essentially no problem with uneven current distribution.

[0061] Understandably, compared to devices that adjust the operation of the corresponding power conversion circuit based on the power output, this application controls the operating states of the first and second power conversion circuits in the power management module based on the load demand voltage and load current, resulting in more precise control. In situations involving high current and low voltage or high voltage and low current, even if the power is relatively low, if the high current exceeds the first current threshold or the high voltage exceeds the voltage threshold, this application controls the first power conversion circuit to stop operating and controls the second power conversion circuit to operate. This protects the first power conversion circuit, preventing damage to its components. The control process is more precise and reliable.

[0062] Furthermore, with more refined control and protection of the first power conversion circuit, the switching parameters of the first power conversion circuit can be designed more precisely, resulting in higher efficiency.

[0063] The following flowchart illustrates the process by which the controller operates different power conversion circuits during changes in load current and load demand voltage.

[0064] In this application, the power conversion circuit with a smaller maximum output power can be referred to as the low-power phase, and the power conversion circuit with a larger maximum output power can be referred to as the high-power phase. For example, the first power conversion circuit and the second power conversion circuit mentioned above can be referred to as the low-power phase and the high-power phase, respectively.

[0065] When the power management module first starts working, the load current increases from 0, so the first power conversion circuit starts operating first to ensure high power efficiency. Once the power management module starts working and receives the load's required voltage, the load's required voltage changes from 0 to a non-zero value. Subsequently, based on the actual value of this load's required voltage and the load current, the module can control either the first or second power conversion circuit to adapt to the actual load demand, outputting appropriate power while maximizing efficiency. See below for details. Figure 2 and Figure 3 The steps are shown.

[0066] Please see Figure 2 ,like Figure 2 As shown, Figure 2 This is a flowchart illustrating a control method provided in an embodiment of this application. Figure 2 As shown, the method includes, but is not limited to, the following steps: Step S201: Receive a command to increase the output voltage.

[0067] Step S202: Determine whether the low-power phase is working.

[0068] If yes, proceed to step S203; otherwise, proceed to step S205.

[0069] Step S203: Determine whether the absolute value of the boosted output voltage is greater than or equal to the voltage threshold.

[0070] If yes, proceed to step S204; otherwise, proceed to step S205.

[0071] Step S204: Control the low-power phase to stop working and control the high-power phase to work.

[0072] Step S205: Execute the instruction to increase the output voltage.

[0073] In this implementation, when the absolute value of the load voltage demand increases, the power control module receives a command to increase the output voltage. It then determines whether the low-power phase (such as the first power conversion circuit) is operating. If the low-power phase is not operating, the output voltage can be directly increased. If the low-power phase is operating, it further determines whether the absolute value of the increased output voltage is less than a voltage threshold. If the absolute value of the increased output voltage is greater than or equal to the voltage threshold, a high-power phase (such as the second power conversion circuit) can be controlled to operate in place of the low-power phase, and the output voltage can then be increased. This prevents the low-power phase from operating when the output voltage is high, protecting the switching transistors in the low-power phase from burnout.

[0074] In one implementation, the boosted output voltage can refer to the boost target value indicated in the received boost output voltage command (hereinafter referred to as the boost command). By comparing the boost target value in the command with a voltage threshold, it is determined whether the power phase needs to be adjusted so that the appropriate power phase can operate. In other words, in practical applications, the voltage can be measured without hardware, but the boost target value can be obtained using software (referring to the boost command), thereby obtaining the load demand voltage and realizing the control of the power phase. This simplifies the measurement steps, simplifies the control process, and increases control efficiency.

[0075] Please see Figure 3 ,like Figure 3 As shown, Figure 3 This is a flowchart illustrating another control method provided in an embodiment of this application. Figure 3 As shown, the method includes, but is not limited to, the following steps: Step S301: Receive a command to reduce the output voltage.

[0076] Step S302: Execute the instruction to reduce the output voltage.

[0077] Step S303: Determine whether the low-power phase is working.

[0078] If yes, proceed to step S307; otherwise, proceed to step S304.

[0079] Step S304: Determine whether the absolute value of the reduced output voltage is greater than or equal to the voltage threshold.

[0080] If yes, proceed to step S307; otherwise, proceed to step S305.

[0081] Step S305: Determine whether the load current is greater than or equal to the first current threshold.

[0082] If yes, proceed to step S307; otherwise, proceed to step S306.

[0083] Step S306: Control the high-power phase to stop working and control the low-power phase to work.

[0084] Step S307: Control the currently operating power phase to continue operating.

[0085] In this implementation, when the absolute value of the load demand voltage decreases, the power control module receives a command to reduce the output voltage. It then determines whether the low-power phase (such as the first power conversion circuit) is operating. If the low-power phase is operating, it can be controlled to continue operating. If the low-power phase is not operating, but the high-power phase is, it further determines whether the absolute value of the reduced output voltage is greater than or equal to a voltage threshold, in which case the high-power phase can be controlled to continue operating. If the absolute value of the reduced output voltage is less than the voltage threshold, it further determines whether the load current is greater than or equal to a first current threshold, in which case the high-power phase can be controlled to continue operating. If the load current is less than the first current threshold, the low-power phase can be controlled to replace the high-power phase. This allows the high-power phase to continue operating as the absolute value of the load demand voltage decreases, protecting the low-power phase switching transistors or switching the high-power phase to the low-power phase, thereby improving power efficiency.

[0086] In one implementation, the reduced output voltage can refer to the target voltage reduction value indicated in the received instruction to reduce the output voltage (hereinafter referred to as the buck instruction). By comparing the target voltage reduction value in the instruction with a voltage threshold, it is determined whether the power phase needs to be adjusted so that the appropriate power phase can operate. In other words, in practical applications, the voltage can be measured without hardware, but the target voltage reduction value can be obtained using software (referring to the buck instruction), thereby obtaining the load demand voltage and realizing the control of the power phase. This simplifies the measurement steps, simplifies the control process, and increases control efficiency.

[0087] In one possible implementation, the aforementioned load current can be obtained through the ELVDD power supply in the power management module. Since the load current corresponding to the ELVDD power supply in the power management module is equal to the load current corresponding to the ELVSS power supply, the load current required in this embodiment can be obtained by reusing the load current data obtained through the ELVDD power supply. Thus, the current detection circuit corresponding to the ELVDD power supply can be reused in the power management module, eliminating the need to design independent current detection circuits for each power phase in the ELVSS power supply. This simplifies circuit design, makes implementation simpler, and helps reduce the size of the power management module.

[0088] Please see also Figure 4 , Figure 4 This is another structural schematic diagram of the power management module provided in an embodiment of this application. Figure 4 Is Figure 1Based on, such as Figure 4 As shown, each power conversion circuit in this power management module (such as the first power conversion circuit and the second power conversion circuit) includes a switching transistor and an inductor. Taking these power conversion circuits as an example of an inverted Buck-Boost circuit, the power conversion circuit may include two switching transistors and one inductor (or a set of inductors). The switching transistor can be an insulated gate bipolar transistor (IGBT) or a metal oxide semiconductor field effect transistor (MOSFET) (hereinafter referred to as MOS transistor), etc., and this application is not limited to this. Taking MOS transistors as an example, the two switching transistors in this power conversion circuit can be NMOS and NMOS. Optionally, the two switching transistors can also be NMOS and PMOS. Figure 4 The diagram shows the relative positions of the switching transistors and inductors in each power conversion circuit to the power supply chip. For example... Figure 4 As shown, the first power conversion circuit (such as...) Figure 4 The power conversion circuit 1) and the second power conversion circuit (such as Figure 4 In the power conversion circuit 2), the inductors are all located outside the power supply chip. The switching transistors in the first power conversion circuit are integrated into the power supply chip, while the switching transistors in the second power conversion circuit are located outside the power supply chip.

[0089] Optionally, the on-resistance of the switching transistor in the first power conversion circuit can be greater than a first threshold. This first threshold can be determined based on the on-resistance of some conventional switching transistors. These conventional switching transistors are used in power management modules that include one or more power conversion circuits, and these conventional switching transistors are fully integrated into the power chip. These conventional switching transistors need to ensure a small on-resistance to meet certain current carrying capacity requirements, therefore their dynamic parameters are large and their light-load efficiency is low. In contrast, the switching transistors in the power conversion circuit integrated into the power chip in this embodiment do not operate when the load current is large. Therefore, switching transistors with larger on-resistance can be selected. Compared to conventional switching transistors of the same process, these transistors have better dynamic parameters, such as the charge Qg required for gate drive and the input capacitance Ciss, which can significantly reduce the switching losses and drive losses of the first power conversion circuit under light-load conditions, thereby improving the power efficiency under light-load conditions.

[0090] Meanwhile, since the switching transistor in the first power conversion circuit is integrated into the power supply chip, compared to placing the switching transistor outside the power supply chip, no additional packaging is required, and all impedance and dynamic parameters are superior. This improves efficiency while reducing the area of ​​the power management module. In other words, in the power management module provided in this application, the switching transistor in the first power conversion circuit is placed inside the power supply chip, while the switching transistor in the second power conversion circuit is placed outside the power supply chip. Compared to a power management module where all switching transistors in the power conversion circuits are placed outside the power supply chip, this reduces the need for packaging the switching transistor in the first power conversion circuit, improves the dynamic parameters of the switching transistor, reduces the inductor requirements, and improves efficiency while reducing area.

[0091] Furthermore, the maximum withstand voltage of the switching transistor in the first power conversion circuit can be less than a preset withstand voltage value, which can refer to the maximum withstand voltage value of the aforementioned conventional switching transistor. In other words, the switching transistor in the power conversion circuit integrated into the power chip in this application can be a switching transistor with a lower withstand voltage. This results in lower switching losses and higher power efficiency during operation, and also ensures a smaller chip wafer area during manufacturing, thereby reducing the overall size.

[0092] Optionally, the on-resistance of the switching transistor in the second power conversion circuit is less than a second threshold, and the second threshold is less than a first threshold. This second threshold can be determined based on the on-resistance of other conventional switching transistors. These conventional switching transistors are used in power management modules that include multiple power conversion circuits, and they are all located outside the power chip. These conventional switching transistors need to ensure suitable dynamic parameters to meet high switching frequency and efficiency performance; therefore, their on-resistance is relatively large, and their current-carrying capacity is relatively low. In contrast, the switching transistors located outside the power chip in this embodiment do not operate under light loads, and switching losses do not need to be considered. Therefore, switching transistors with lower on-resistance can be selected. Compared to conventional switching transistors of the same process, these transistors have larger dynamic parameters, better on-resistance, lower conduction losses, less heat generation, and improved current-carrying capacity when the second power conversion circuit is operating.

[0093] Meanwhile, since the switching transistor in the second power conversion circuit is located outside the power supply chip, it has a separate package compared to the switching transistor integrated into the power supply chip, resulting in better heat dissipation and a higher output power capability. In other words, in the power management module provided in this application, the switching transistor in the first power conversion circuit is located inside the power supply chip, while the switching transistor in the second power conversion circuit is located outside the power supply chip. Compared to a power management module where all switching transistors in the power conversion circuits are located inside the power supply chip, this module eliminates the need to consider the switching losses of the switching transistor in the second power conversion circuit, resulting in lower on-resistance and a separate package, leading to better heat dissipation and improved current carrying capacity, thereby increasing the upper limit of output power. Furthermore, the switching transistor located outside the power supply chip is not limited by the power supply chip, allowing for flexible selection of suitable switching transistors according to application requirements, resulting in lower overall cost, wider applicability, and better performance.

[0094] In this embodiment, by integrating the switching transistor in the first power conversion circuit into the power supply chip and placing the switching transistor in the second power conversion circuit outside the power supply chip, the first power conversion circuit can be controlled under light load conditions, improving power efficiency under light load conditions. Under heavy load conditions, the second power conversion circuit can be controlled to increase output power. This achieves a balance between high efficiency and output power, adapting to various application scenarios.

[0095] Please see also Figure 5 , Figure 5 This is another structural schematic diagram of the power management module provided in an embodiment of this application. Figure 5 Is Figure 4 It is derived from this. For example... Figure 5 As shown, the power management module described above may also include a third power conversion circuit (such as...). Figure 5 The power conversion circuit 3 in the power management module has a maximum output power greater than or equal to the maximum output power of the second power conversion circuit; the inductor and switching transistor in the third power conversion circuit are located outside the power chip; the controller in the power management module can be specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to work. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the second current threshold, the second power conversion circuit is controlled to work. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the second current threshold, the second power conversion circuit is controlled to work. When the load current is greater than or equal to the second current threshold, control the operation of the second power conversion circuit and the third power conversion circuit. The second current threshold is greater than the first current threshold.

[0096] For example, the first current threshold may be in the range of 100mA to 800mA, and the second current threshold may be in the range of 500mA to 2500mA.

[0097] In this embodiment, the power output capabilities of both the third and second power conversion circuits are stronger than those of the first power conversion circuit, and the power output capability of the third power conversion circuit is roughly the same as or stronger than that of the second power conversion circuit. Thus, the current-carrying capacity and withstand voltage of components such as switches and inductors in the third power conversion circuit are also higher. When the load current is large, for example, greater than or equal to the first current threshold and less than the second current threshold, the second power conversion circuit can be controlled to operate, and the circuit may be in a medium-load state, where one power conversion circuit can meet the load requirements. When the load current is even larger, for example, greater than or equal to the second current threshold, the controller can control both the second and third power conversion circuits to operate simultaneously. In this case, the circuit may be in a heavy-load state, and the parallel output of the two power conversion circuits to supply power to the load can provide greater voltage and power to meet the load requirements.

[0098] Understandably, when the load demand voltage is small (less than the voltage threshold) and the load current is small (less than the first current threshold), the controller can control the first power conversion circuit to work. At this time, the circuit may be in a light load state, and the load demand can be met by using one power conversion circuit. Since the switching transistor in the first power conversion circuit is integrated in the power chip, the power efficiency can be improved.

[0099] This application sets up a low-power phase (referring to the first power conversion circuit) built into the switching transistor and at least two high-power phases (including the second and third power conversion circuits) externally connected to the switching transistor. According to the load demand voltage and load current, it controls the low-power phase to work alone, the high-power phase to work alone, and the two high-power phases to work in parallel. This can meet the load requirements for light load, medium load, and heavy load conditions respectively. It improves power efficiency under light load conditions and provides greater output power under heavy load conditions, thereby meeting the needs of different scenarios and achieving a balance between high efficiency and high power.

[0100] In addition, the switching transistors of the third power conversion circuit and the second power conversion circuit are both located outside the power chip. Switching transistors with lower on-resistance can be selected to reduce conduction losses and heat generation, thereby improving the output power and output voltage depth of the power management module.

[0101] Furthermore, since the high-power phase and the low-power phase do not operate simultaneously, there is essentially no problem with uneven current distribution.

[0102] Please see also Figure 6 , Figure 6 This is another structural schematic diagram of the power management module provided in an embodiment of this application. Figure 6 Is Figure 4 It is derived from this. For example... Figure 6 As shown, the upper power management module also includes a fourth power conversion circuit (such as...). Figure 6 In the power conversion circuit 4), the maximum output power of the fourth power conversion circuit is greater than or equal to the maximum output power of the first power conversion circuit, and less than the maximum output power of the second power conversion circuit; the inductor in the fourth power conversion circuit is located outside the power supply chip, and the switching transistor in the fourth power conversion circuit is integrated into the power supply chip; the controller can be specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to work. When the load demand voltage is less than the voltage threshold, and the load current is greater than or equal to the first current threshold and less than the third current threshold, the first power conversion circuit and the fourth power conversion circuit are controlled to operate. When the load current is greater than or equal to the third current threshold, the first power conversion circuit and the fourth power conversion circuit are stopped working, and the second power conversion circuit is started. When the load demand voltage is greater than or equal to the voltage threshold, control the second power conversion circuit to work; The third current threshold is greater than the first current threshold.

[0103] For example, the first current threshold may be in the range of 100mA to 800mA, and the third current threshold may be in the range of 500mA to 2500mA.

[0104] In this embodiment, the power output capabilities of both the fourth and first power conversion circuits are weaker than those of the second power conversion circuit, and the power output capability of the fourth power conversion circuit is roughly the same as or slightly stronger than that of the first power conversion circuit. Therefore, the current-carrying capacity and voltage withstand capability of the switching transistors and inductors in the fourth power conversion circuit are also relatively small. When the load demand voltage is low and the load current is low (less than the first current threshold), the controller can control the first power conversion circuit to operate. At this time, the circuit may be in a light load state, and using only one power conversion circuit can meet the load demand with high efficiency. When the load demand voltage is low and the load current is moderate (greater than or equal to the first current threshold and less than the third current threshold), the controller can control both the first and fourth power conversion circuits to operate together. At this time, the circuit can be in a medium load state, and the two power conversion circuits output in parallel to power the load, meeting the load demand with high efficiency.

[0105] Understandably, when the load demand voltage is large (greater than or equal to the voltage threshold) or the load current is large (greater than or equal to the third current threshold), the controller can control the second power conversion circuit to work. At this time, the circuit may be under heavy load. Using the second power conversion circuit can meet the load demand. Since the switching transistor in the second power conversion circuit is located outside the power chip, heat generation can be reduced and a larger output power can be provided.

[0106] This application sets up two low-power phases (referring to the first and fourth power conversion circuits) with built-in switching transistors and high-power phases (including the second and third power conversion circuits) with external switching transistors. According to the load demand voltage and load current, it controls one low-power phase to work alone, two low-power phases to work together, and the high-power phase to work alone. This can meet the load requirements for light load, medium load, and heavy load conditions respectively. It improves power supply efficiency under light load and medium load conditions and provides greater output power under heavy load conditions, thus meeting the needs of different scenarios and achieving a balance between high efficiency and high power. Figure 6 The power management module shown is Figure 5 Compared to the power management module shown, it has a slightly smaller load-carrying capacity under heavy loads and is suitable for display devices with moderate power.

[0107] Furthermore, since the high-power phase and the low-power phase do not operate simultaneously, there is essentially no problem with uneven current distribution.

[0108] Please see also Figure 7 , Figure 7 This is another structural schematic diagram of the power management module provided in an embodiment of this application. Figure 7 Is Figure 1 It is derived from this. For example... Figure 7 As shown, the first power conversion circuit (such as...) Figure 7 The power conversion circuit 1) and the second power conversion circuit (such as) Figure 7 The power conversion circuits 2) in each power conversion circuit include switching transistors and inductors, and the switching transistors and inductors in each power conversion circuit are located outside the power supply chip.

[0109] In this embodiment, the power management module includes a first power conversion circuit and a second power conversion circuit with different power output capabilities. Since the switching transistors in each power conversion circuit are located outside the power chip, each power conversion circuit can use transistors with lower on-resistance. These power conversion circuits have better heat dissipation and stronger load-carrying capacity during operation. Different power conversion circuits can be controlled to operate when the load demand voltage and load current differ. For example, the first power conversion circuit can be controlled to operate under light load conditions, while the second power conversion circuit can be controlled to operate under heavy load conditions. This allows the first power conversion circuit to improve power efficiency under light load conditions and the second power conversion circuit to improve output power under heavy load conditions.

[0110] Please see also Figure 8 , Figure 8 This is another structural diagram of the power management module provided in this application. Figure 8 Is Figure 7 It is derived from this. For example... Figure 8 As shown, the power management module may also include a fifth power conversion circuit (such as...). Figure 8 The fifth power conversion circuit (5) has a maximum output power greater than or equal to the maximum output power of the second power conversion circuit; the switching transistors and inductors in the fifth power conversion circuit are located outside the power supply chip; the controller can be specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to work. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the fourth current threshold, the second power conversion circuit is controlled to work, and the fourth current threshold is greater than the first current threshold. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the fourth current threshold, the second power conversion circuit is controlled to work. When the load current is greater than or equal to the fourth current threshold, the second power conversion circuit and the fifth power conversion circuit are controlled to operate.

[0111] For example, the first current threshold can be in the range of 100mA to 800mA, and the fourth current threshold can be in the range of 500mA to 2500mA. In this embodiment, the power management module may include a low-power phase with external switching transistors (such as a first power conversion circuit) and at least two high-power phases with external switching transistors (such as a second power conversion circuit and a fifth power conversion circuit). According to the load demand voltage and load current, the module can control the low-power phase to work alone, the high-power phase to work alone, or the two high-power phases to work together, respectively. This can meet the load requirements for different load conditions, improve power efficiency under light load conditions, and provide greater output power under heavy load conditions, thereby improving the overall current output capability and voltage output capability. This can meet the needs of different scenarios and achieve a balance between high efficiency and high power. Figure 8 The power management module shown has a stronger load-bearing capacity under heavy loads and can be used in display devices with higher power requirements. In other words, Figure 8 compared to Figure 7 The power management modules available can have a higher output power limit, which can meet the power requirements of larger loads.

[0112] Please see also Figure 9 , Figure 9This is another structural schematic diagram of the power management module provided in an embodiment of this application. Figure 9 Is Figure 1 It is derived from this. For example... Figure 9 As shown, the first power conversion circuit (such as...) Figure 9 The power conversion circuit 1) and the second power conversion circuit (such as) Figure 9 The power conversion circuits 2) in each power conversion circuit include switching transistors and inductors. The inductors in each power conversion circuit are located outside the power supply chip, and the switching transistors in each power conversion circuit are integrated into the power supply chip.

[0113] In this embodiment, the power management module includes a first power conversion circuit and a second power conversion circuit with different power output capabilities. Since the switching transistors in each power conversion circuit are integrated into a power chip, the switching transistors in each power conversion circuit can be selected with suitable on-resistance and dynamic parameters. Because different load requirements and load currents correspond to different load conditions, controlling the appropriate power conversion circuit under different load conditions ensures high efficiency for each power conversion circuit. Furthermore, controlling the operating states of the first and second power conversion circuits based on the load requirement voltage and load current allows for more precise control. In cases of high current and low voltage or high voltage and low current, even with varying power, if the high current exceeds a first current threshold or the high voltage exceeds a voltage threshold, this application controls the first power conversion circuit to stop working and controls the second power conversion circuit to work. This protects the first power conversion circuit, preventing damage to its components. The control process is more precise and reliable. Furthermore, with more precise control and protection of the first power conversion circuit, the switching transistor parameters of both the first and second power conversion circuits can be designed more precisely, resulting in higher efficiency.

[0114] Please see also Figure 10 , Figure 10 This is another structural diagram of the power management module provided in this application. Figure 10 Is Figure 9 It is derived from this. For example... Figure 10 As shown, the power management module may also include a sixth power conversion circuit (such as...). Figure 10 The power conversion circuit 6 in the sixth power conversion circuit has a maximum output power greater than or equal to the maximum output power of the second power conversion circuit; the inductor in the sixth power conversion circuit is located outside the power supply chip, and the switching transistor in the sixth power conversion circuit is also integrated into the power supply chip; the controller can be specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to work. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the fifth current threshold, the second power conversion circuit is controlled to work, and the fifth current threshold is greater than the first current threshold. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the fifth current threshold, the second power conversion circuit is controlled to work. When the load current is greater than or equal to the fifth current threshold, the second power conversion circuit and the sixth power conversion circuit are controlled to operate.

[0115] For example, the first current threshold may be in the range of 100mA to 800mA, and the fifth current threshold may be in the range of 500mA to 2500mA.

[0116] In this embodiment, the power management module may include a low-power phase (such as the first power conversion circuit) and a high-power phase (such as the second power conversion circuit and the sixth power conversion circuit) with built-in switching transistors. According to the load demand voltage and load current, the module can control the low-power phase to work alone, the high-power phase to work alone, or the two high-power phases to work together. This can meet the load demand for different load conditions, adapt to different load states, and provide more precise control for each load state, thereby improving efficiency. Figure 10 The power management module shown has a more refined control process, achieving higher power efficiency while ensuring a certain power output capability. In other words, Figure 10 compared to Figure 9 The power management module is more efficient and has a higher output power limit, which can meet the power requirements of larger loads.

[0117] In one possible implementation, as in Figure 1 , Figures 4-10 In any of the power management modules shown in the diagram, the controller can pre-set two sets of loop compensation parameters for each power conversion circuit based on the different inductance values. These two sets of loop compensation parameters (e.g., loop compensation parameter A1 and loop compensation parameter A2) can respectively adapt to inductors with smaller and larger inductance values. When an inductor with a smaller inductance value is selected in a power conversion circuit in the power management module, the controller can control the switching of the transistor in that power conversion circuit according to the corresponding loop compensation parameter A1. When an inductor with a larger inductance value is selected in a power conversion circuit in the power management module, the controller can control the switching of the transistor in that power conversion circuit according to the corresponding loop compensation parameter A2. In this way, the power control module can be applied to scenarios with different inductance values, achieving a balance between high output power and high power efficiency, making it flexible in its application scenarios.

[0118] This application also provides a power supply chip. Figure 11 This is a schematic diagram of the structure of a power chip provided in an embodiment of this application. Figure 11 As shown, the power chip may include a controller. The power chip is used to connect to a power source, and the controller is used to connect one end of a first power conversion circuit and one end of a second power conversion circuit. The maximum output power of the first power conversion circuit is less than the maximum output power of the second power conversion circuit. The other ends of the first and second power conversion circuits are used to connect to a load. Both the first and second power conversion circuits are used to convert the voltage output from the power source. The controller is used for: The system receives the load demand voltage and load current, and controls the first or second power conversion circuit to operate based on the magnitude of the load demand voltage and load current. The load current is the current received by the load.

[0119] In this embodiment, the power chip controls each power conversion circuit and adjusts the appropriate power conversion circuit (first power conversion circuit or second power conversion circuit) to work according to the load demand voltage and load current. This allows it to meet load requirements for different load conditions and adapt to various application scenarios.

[0120] In one possible implementation, the controller in the power chip can be used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate.

[0121] The second power conversion circuit is controlled to operate when the load demand voltage is greater than or equal to the voltage threshold, or when the load current is greater than or equal to the first current threshold.

[0122] In this embodiment, the controller controls the first power conversion circuit to operate when the load demand voltage and load current are low. Since the first power conversion circuit can use switching transistors with better dynamic parameters, power efficiency can be improved under light load conditions. When the controller controls the first power conversion circuit to operate when the load demand voltage or load current is high, since the first power conversion circuit can use switching transistors with lower on-resistance, conduction losses are reduced, and output power can be increased under heavy load conditions, improving the overall current output capability and voltage output capability. Thus, this power supply can meet the needs of different scenarios, achieving a balance between high power efficiency and high output power.

[0123] In one possible implementation, the controller is also used to connect one end of the fifth power conversion circuit, the other end of the fifth power conversion circuit being used to connect to a load, wherein the maximum output power of the fifth power conversion circuit is greater than or equal to the maximum output power of the second power conversion circuit; the controller may specifically be used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to work. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the fourth current threshold, the second power conversion circuit is controlled to work, and the fourth current threshold is greater than the first current threshold. When the load demand voltage is less than the voltage threshold and the load current is greater than the first current threshold but less than the fourth current threshold, the second power conversion circuit is controlled to work. When the load current is greater than or equal to the fourth current threshold, the second power conversion circuit and the fifth power conversion circuit are controlled to operate.

[0124] In this embodiment, the controller controls the low-power phase to work alone, the high-power phase to work alone, or the two high-power phases to work together, according to the load demand voltage and load current. This allows the controller to meet the load requirements for different load conditions, improve power efficiency under light load conditions, and provide greater output power under heavy load conditions. This enhances the overall current output capability and voltage output capability, thereby meeting the needs of different scenarios and achieving a balance between high efficiency and high power.

[0125] In addition, compared to adjusting the operation of the corresponding power conversion circuit according to the power level, the power chip in this application controls the operating state of the first power conversion circuit and the second power conversion circuit according to the load demand voltage and load current. The control is more precise. In some cases of high current and low voltage or high voltage and low current, although the power is large, if the high current exceeds the first current threshold or the high voltage exceeds the voltage threshold, this application controls the first power conversion circuit to stop working and controls the second power conversion circuit to work. This can protect the first power conversion circuit and avoid damage to the components in the first power conversion circuit. The control process is more precise and the reliability is higher.

[0126] This application also provides a display module. Figure 12 This is a schematic diagram of the structure of a display module provided in an embodiment of this application. Figure 12 As shown, the display module may include, for example: Figure 1 , Figures 4-10 The power management module and display device shown in any of the illustrations are configured such that the input terminal of the power management module is connected to a power supply, and the output terminal of the power management module is connected to the display device. The power management module converts the voltage supplied by the power supply and outputs it to the display device. Because the power management module in this display module can improve power efficiency under light load conditions and increase output power under heavy load conditions, this display module can achieve a balance between high power and high efficiency.

[0127] This application also provides an electronic device, Figure 13This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 13 As shown, the electronic device includes, Figure 1 , Figures 4-10 Any power management module shown in the diagram, such as Figure 11 The power chip shown or such Figure 12 The display module shown is an example of this electronic device. In this device, because the power chip or power management module can improve power efficiency under light load conditions and increase output power under heavy load conditions, the electronic device can achieve a balance between high power and high efficiency.

[0128] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power management module, characterized in that, The device includes a power supply chip, a first power conversion circuit, and a second power conversion circuit. The power supply chip is used to connect to a power source and includes a controller. One end of the first power conversion circuit and one end of the second power conversion circuit are respectively connected to the controller. The other ends of the first power conversion circuit and the other ends of the second power conversion circuit are respectively used to connect to a load. The maximum output power of the first power conversion circuit is less than the maximum output power of the second power conversion circuit. The first power conversion circuit and the second power conversion circuit are used to convert the voltage output by the power supply; The controller is used to receive the load demand voltage and obtain the load current of the load, and control the first power conversion circuit or the second power conversion circuit to work according to the load demand voltage and the load current, wherein the load current is the current output by the power management module to the load.

2. The power management module according to claim 1, characterized in that, The controller is specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is greater than or equal to the voltage threshold, or when the load current is greater than or equal to the first current threshold, the second power conversion circuit is controlled to operate.

3. The power management module according to claim 2, characterized in that, Both the first power conversion circuit and the second power conversion circuit include a switching transistor and an inductor. The inductors of both the first power conversion circuit and the second power conversion circuit are located outside the power supply chip. The switching transistor in the first power conversion circuit is integrated into the power supply chip, while the switching transistor in the second power conversion circuit is located outside the power supply chip.

4. The power management module according to claim 3, characterized in that, The power management module further includes a third power conversion circuit, the maximum output power of which is greater than or equal to the maximum output power of the second power conversion circuit; the inductor and switching transistor in the third power conversion circuit are located outside the power chip; the controller is specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the second current threshold, the second power conversion circuit is controlled to operate. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the second current threshold, the second power conversion circuit is controlled to operate. When the load current is greater than or equal to the second current threshold, the second power conversion circuit and the third power conversion circuit are controlled to operate. Wherein, the second current threshold is greater than the first current threshold.

5. The power management module according to claim 3, characterized in that, The power management module further includes a fourth power conversion circuit. The maximum output power of the fourth power conversion circuit is greater than or equal to the maximum output power of the first power conversion circuit, and less than the maximum output power of the second power conversion circuit. The inductor in the fourth power conversion circuit is located outside the power chip, and the switching transistor in the fourth power conversion circuit is integrated into the power chip. The controller is specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is less than the voltage threshold, and the load current is greater than or equal to the first current threshold and less than the third current threshold, the first power conversion circuit and the fourth power conversion circuit are controlled to operate. When the load current is greater than or equal to the third current threshold, the first power conversion circuit and the fourth power conversion circuit are controlled to stop working, and the second power conversion circuit is controlled to work. When the load demand voltage is greater than or equal to the voltage threshold, the second power conversion circuit is controlled to operate. The third current threshold is greater than the first current threshold.

6. The power management module according to claim 2, characterized in that, Both the first power conversion circuit and the second power conversion circuit include a switching transistor and an inductor, and the switching transistor and the inductor in both the first power conversion circuit and the second power conversion circuit are located outside the power supply chip.

7. The power management module according to claim 6, characterized in that, The power management module further includes a fifth power conversion circuit, the maximum output power of which is greater than or equal to the maximum output power of the second power conversion circuit; the switching transistors and inductors in the fifth power conversion circuit are located outside the power chip; the controller is specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the fourth current threshold, the second power conversion circuit is controlled to operate, wherein the fourth current threshold is greater than the first current threshold. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the fourth current threshold, the second power conversion circuit is controlled to operate. When the load current is greater than or equal to the fourth current threshold, the second power conversion circuit and the fifth power conversion circuit are controlled to operate.

8. The power management module according to claim 2, characterized in that, Both the first power conversion circuit and the second power conversion circuit include a switching transistor and an inductor. The inductors in both the first power conversion circuit and the second power conversion circuit are located outside the power supply chip, while the switching transistors in both the first power conversion circuit and the second power conversion circuit are integrated into the power supply chip.

9. The power management module according to claim 8, characterized in that, The power management module further includes a sixth power conversion circuit, the maximum output power of which is greater than or equal to the maximum output power of the second power conversion circuit; the inductor in the sixth power conversion circuit is located outside the power chip, and the switching transistor in the sixth power conversion circuit is also integrated into the power chip; the controller is specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the fifth current threshold, the second power conversion circuit is controlled to operate, wherein the fifth current threshold is greater than the first current threshold. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the fifth current threshold, the second power conversion circuit is controlled to operate. When the load current is greater than or equal to the fifth current threshold, the second power conversion circuit and the sixth power conversion circuit are controlled to operate.

10. The power management module according to claim 2, characterized in that, The first current threshold is determined based on the maximum current carrying capacity of the switching transistor in the first power conversion circuit, and the voltage threshold is determined based on the maximum withstand voltage of the switching transistor in the first power conversion circuit.

11. The power management module according to claim 2, characterized in that, The on-resistance of the switching transistor in the first power conversion circuit is greater than a first threshold, and the on-resistance of the switching transistor in the second power conversion circuit is less than a second threshold, and the second threshold is less than the first threshold.

12. The power management module according to any one of claims 1-11, characterized in that, The load includes a display device, and each of the power conversion circuits is used to provide a negative voltage power supply to the display device.

13. A display module, characterized in that, The display module includes a power management module and a display device as described in any one of claims 1-12, wherein the input terminal of the power management module is used to connect to a power supply, the output terminal of the power management module is used to connect to the display device, and the power management module is used to convert the voltage provided by the power supply and output it to the display device.

14. A power supply chip, characterized in that, The power chip includes a controller, which is used to connect to a power source. The controller is used to connect one end of a first power conversion circuit and one end of a second power conversion circuit. The other ends of the first power conversion circuit and the other ends of the second power conversion circuit are used to connect to a load. The maximum output power of the first power conversion circuit is less than the maximum output power of the second power conversion circuit. The first power conversion circuit and the second power conversion circuit are used to convert the voltage output by the power supply; The controller is used to receive the load demand voltage and obtain the load current of the load, and control the first power conversion circuit or the second power conversion circuit to work according to the load demand voltage and the load current, wherein the load current is the current received by the load.

15. The power chip according to claim 14, characterized in that, The controller is specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is greater than or equal to a voltage threshold, or when the load current is greater than or equal to a first current threshold, the second power conversion circuit is controlled to operate.

16. The power chip according to claim 15, characterized in that, The controller is also used to connect one end of the fifth power conversion circuit, the other end of the fifth power conversion circuit being used to connect the load, the maximum output power of the fifth power conversion circuit being greater than or equal to the maximum output power of the second power conversion circuit; the controller is specifically used for: When the load demand voltage is less than the voltage threshold and the load current is less than the first current threshold, the first power conversion circuit is controlled to operate. When the load demand voltage is greater than or equal to the voltage threshold and the load current is less than the fourth current threshold, the second power conversion circuit is controlled to operate, wherein the fourth current threshold is greater than the first current threshold. When the load demand voltage is less than the voltage threshold and the load current is greater than or equal to the first current threshold and less than the fourth current threshold, the second power conversion circuit is controlled to operate. When the load current is greater than or equal to the fourth current threshold, the second power conversion circuit and the fifth power conversion circuit are controlled to operate.

17. An electronic device, characterized in that, The electronic device includes a power management module as described in any one of claims 1-12, a display module as described in claim 13, or a power chip as described in any one of claims 14-16.

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