System power supply structure with low power consumption

Abstract

The utility model relates to the technical field of power supply systems, in particular to a low-power-consumption system power supply structure which comprises a power supply unit and a main control unit electrically connected with the power supply unit. The main control unit comprises a switch piece which is electrically connected with the power supply unit and can control the power supply unit to be turned on and turned off, a sensor which is electrically connected with the power supply unit, and a controller which is electrically connected or in communication connection with the switch piece and the sensor at the same time. The sensor monitors the output voltage of the power supply unit and sends information to the controller, and the controller compares the information with a preset value and further dynamically adjusts the output voltage of the power supply unit by controlling the on-off time of the switch piece. The technical problem that in the prior art, power consumption of a power system is too high is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of power supply systems, and in particular to a low-power system power supply structure. Background Art

[0002] Mobile devices have gradually increased in recent years, and they appear in consumer and industrial products in various forms. As the energy demand of products increases, the power supply voltage level of the system motherboard is also constantly increasing, and the types of demand are also diversified, including 5V, 12V, 24V, 48V, etc. However, the power supply voltage level of the main control chip is gradually decreasing, including 3.3V, 1.8V, 1.5V, 1.2V, etc. In order to ensure the normal operation of the entire system, many types of step-down power supplies have emerged. The existing technology consumes a lot of energy in this process, which makes the system power supply capacity even worse, so the low-power system power supply design is particularly important. Utility Model Content

[0003] The present application provides a low-power system power supply structure to at least solve the technical problem of excessive power consumption of the power supply system in the prior art.

[0004] In order to achieve the above-mentioned objectives, the present application provides a low-power system power supply structure, including a power supply unit and a main control unit electrically connected to the power supply unit, the main control unit including a switch element electrically connected to the power supply unit and capable of controlling the opening and closing of the power supply unit, a sensor electrically connected to the power supply unit, and a controller electrically or communicatively connected to the switch element and the sensor, the sensor monitors the output voltage of the power supply unit and sends the information to the controller, the controller compares the information with a preset value and then dynamically adjusts the output voltage of the power supply unit by controlling the opening and closing time of the switch element.

[0005] In some embodiments, the power supply unit is electrically connected to a low power consumption processing unit, and the low power consumption processing unit cooperates with the main control unit to reduce the operating frequency of the circuit in which the power supply unit is located while ensuring the stability of the output voltage of the power supply unit.

[0006] In some embodiments, the low power consumption processing unit includes an inductor electrically connected to the power supply unit and a diode electrically connected to the inductor. When the power supply unit is turned off, the diode, the inductor and the electrical appliance form a closed loop.

[0007] In some embodiments, a cathode of the diode is connected to an input terminal of the inductor, so that current can flow in the loop.

[0008] In some embodiments, the low power consumption processing unit further includes a capacitor connected in parallel across the electrical appliance.

[0009] In some of the embodiments, the low power consumption processing unit further includes a power management chip electrically or communicatively connected to the sensor and the controller.

[0010] In some of the embodiments, the power management chip is integrated with a timing control unit for implementing scheduled sleep and wake-up of the system.

[0011] In some of the embodiments, the power supply unit is a battery module composed of at least one battery.

[0012] In some of the embodiments, the battery is a lithium iron phosphate battery, a ternary lithium battery, or a polymer battery.

[0013] In some embodiments, the voltage of the battery is 3-4.2V.

[0014] According to the above content, the beneficial effect of the present application is: according to the load demand of the system, the controller and the sensor in the circuit cooperate with each other to adjust the on and off time of the power supply unit, thereby realizing dynamic adjustment of the output voltage of the power supply unit, thereby reducing the energy consumption of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 is a circuit diagram of the system of the embodiment of the present application;

[0017] Figure 2 It is a flowchart of the embodiment of the present application.

[0018] Description of reference numerals: power supply unit Vin; switch element Q; controller PWM; diode D; capacitor C; inductor L; electrical appliance RL; output voltage V0; ground line GND. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for ordinary technicians in the field related to the contents disclosed in the present application, some changes such as design, manufacturing or production based on the technical contents disclosed in the present application are only conventional technical means, and should not be understood as insufficient contents disclosed in the present application.

[0020] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0021] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation, and may represent the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to greater than or equal to two. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships, for example, "A and / or B" can represent: A exists alone, A and B exist at the same time, and B exists alone. The terms "first", "second", "third" and the like involved in the present application are merely used to distinguish similar objects and do not represent a specific ordering of the objects.

[0022] Implementation example Figures 1-2As shown in the figure, Vin is the power supply unit, Q is the switch, PWM is the controller, D is the diode, C is the capacitor, L is the inductor, RL is the electrical appliance connected to the system, V0 is the output voltage, and GND is the ground wire.

[0023] A low-power system power supply structure includes a power supply unit Vin, a power management unit electrically connected to the power supply unit Vin, and a low-power processing unit. The power management unit includes a main control unit, and the low-power processing unit cooperates with the main control unit to reduce the operating frequency of the circuit where the power supply unit Vin is located while ensuring the stability of the output voltage of the power supply unit Vin, thereby achieving the purpose of reducing power consumption. The low-power processing unit includes an inductor L, a diode D and a capacitor C. The main control unit includes a switch device Q, a controller and a sensor. The power supply unit Vin, the switch device Q, the inductor L and the electrical appliance RL connected to the circuit form a closed loop in series.

[0024] Specifically, the output end of the power supply unit Vin is electrically connected to the input end of the switch element Q, the output end of the switch element Q is electrically connected to the input end of the inductor L, the output end of the inductor L is electrically connected to the input end of the electrical user RL, and the output end of the electrical user RL is electrically connected to the power supply unit Vin. The capacitor C is connected in parallel at both ends of the electrical user RL, the cathode of the diode D is electrically connected between the output end of the switch element Q and the input end of the inductor L, and the anode of the diode D is electrically connected between the output end of the electrical user RL and the input end of the power supply unit Vin.

[0025] Specifically, when the switch Q is turned on, the current in the inductor L increases, and the energy is stored in the inductor L; when the switch Q is turned off, the diode D, the inductor L and the electrical appliance RL form a closed loop, and the current in the inductor L can continue to flow to the electrical appliance RL in the loop, and the diode D can prevent the reverse voltage from damaging the switch Q. When the switch Q turns off the inductor L to release energy, the output voltage will fluctuate, and the capacitor C connected in parallel at both ends of the electrical appliance RL can absorb these fluctuations to make the output voltage more stable.

[0026] Furthermore, the sensor is electrically connected in the circuit to monitor the output voltage of the power supply unit Vin, and the controller is electrically connected or communicatively connected to the sensor and the switch element Q at the same time. The sensor converts the output voltage signal of the monitored power supply unit Vin into an electrical signal and feeds it back to the controller. The controller is preset with a set value, and compares the sensor feedback signal with the set value to determine whether the output voltage needs to be adjusted. The controller controls the opening and closing of the switch element Q by comparing the sensor feedback signal with the set value and the difference obtained, and controls the closing or conducting time of the switch element Q to make the output voltage of the power supply unit Vin approach the set value.

[0027] Specifically, when the controller controls the switch element Q to increase its conduction time in the circuit, the increase in conduction time increases the energy in the circuit flowing into the output port, thereby increasing the output voltage of the power supply unit Vin; when the controller controls the switch element Q to reduce its conduction time in the circuit, the reduction in conduction time reduces the energy in the circuit flowing into the output port, thereby reducing the output voltage of the power supply unit Vin. The controller dynamically adjusts the output voltage of the power supply unit Vin by controlling the opening and closing time of the switch element Q.

[0028] Furthermore, the circuit is also provided with a stability adjustment module electrically or communicatively connected to the controller, which is responsible for monitoring the fluctuation of the output voltage and adjusting the on-time of the switch element Q as needed to maintain the stability of the output voltage. If the output voltage fluctuates, the stability adjustment module will adjust the on-time of the switch element Q through the controller to suppress the voltage fluctuation and ensure that the output voltage runs stably near the set value.

[0029] Specifically, the switch element Q is a power switch element, such as an insulated gate bipolar transistor.

[0030] Furthermore, the adjustment of the conduction time of the switch element Q is determined by an algorithm within the controller, and is usually implemented through PWM (pulse width modulation) technology.

[0031] Furthermore, the low-power processing unit also includes a power management chip electrically or communicatively connected to the sensor and the controller. The power management chip can monitor the power status, control the charging and discharging process, improve the power conversion efficiency, and monitor and control the energy loss, thereby extending the working time of the system. A timing control unit is integrated in the power management chip, and the timing control unit can realize the timing sleep and wake-up of the system, thereby reducing power consumption.

[0032] Specifically, the power supply unit Vin is a battery module composed of at least one battery, the voltage of a single battery is 3-4.2V, the batteries are connected in series, and the final voltage output by the power supply is N*(3-4.2)V, where N is the number of battery cells in series.

[0033] Specifically, the battery is a lithium iron phosphate battery, a ternary lithium battery, or a polymer battery.

[0034] Working process: Close the power button of the system device. The closing of the power button triggers the startup of the low-power processing unit. After the low-power processing unit is started, the power management unit is turned on. The power management unit will perform a self-check to detect whether there are any tasks to be executed in the background. If there are tasks to be executed, the main control unit will feedback to the low-power processing unit, and the low-power processing unit will execute the normally open power management unit to put the main control unit in normal working state; when the main control unit has no tasks to be executed during the self-check process, it will feedback to the low-power processing unit, and the low-power processing unit will turn off the power management unit. The power management unit has no output voltage, the main control unit enters the shutdown state, and the low-power processing unit enters the sleep state. At this time, the device is in the lowest power consumption state, and the low-power processing unit will turn on the power management unit at a scheduled time according to the set time, so that the main control unit will start up at a scheduled time, and perform a self-check after starting up to determine whether it needs to enter the shutdown state.

[0035] Those skilled in the art should understand that the technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A low power consumption system power supply structure, characterized in that: The invention comprises a power supply unit and a main control unit electrically connected to the power supply unit, wherein the main control unit comprises a switch electrically connected to the power supply unit and capable of controlling the opening and closing of the power supply unit, a sensor electrically connected to the power supply unit, and a controller electrically connected or communicatively connected to the switch and the sensor at the same time, wherein the sensor monitors the output voltage of the power supply unit and sends the information to the controller, and the controller compares the information with a preset value and then dynamically adjusts the output voltage of the power supply unit by controlling the opening and closing time of the switch.

2. The low power consumption system power supply structure according to claim 1, characterized in that: The power supply unit is electrically connected to a low power consumption processing unit, and the low power consumption processing unit cooperates with the main control unit to reduce the operating frequency of the circuit where the power supply unit is located while ensuring the stability of the output voltage of the power supply unit.

3. The low power consumption system power supply structure according to claim 2, characterized in that: The low power consumption processing unit includes an inductor electrically connected to the power supply unit and a diode electrically connected to the inductor. When the power supply unit is turned off, the diode, the inductor and the electrical appliance form a closed loop.

4. The low power consumption system power supply structure according to claim 3, characterized in that: The cathode of the diode is connected to the input end of the inductor, so that current can flow in the loop.

5. The low power consumption system power supply structure according to claim 3, characterized in that: The low power consumption processing unit further includes a capacitor connected in parallel at both ends of the electrical appliance.

6. The low power consumption system power supply structure according to claim 2, characterized in that: The low power consumption processing unit further comprises a power management chip electrically or communicatively connected to the sensor and the controller.

7. A low power consumption system power supply structure according to claim 6, characterized in that: The power management chip is integrated with a timing control unit for realizing the timing sleep and wake-up of the system.

8. A low power consumption system power supply structure according to any one of claims 1 to 7, characterized in that: The power supply unit is a battery module composed of at least one battery.

9. A low power consumption system power supply structure according to claim 8, characterized in that: The battery is a lithium iron phosphate battery, a ternary lithium battery or a polymer battery.

10. The low power consumption system power supply structure according to claim 8, characterized in that: The voltage of the battery is 3-4.2V.

Images