Circuit for direct current to direct current conversion, control method, voltage source and chip

Abstract

The invention relates to the technical field of power electronics, and discloses a circuit for direct current to direct current conversion, a control method, a voltage source and a chip, and the circuit comprises a power inductor which is used for storing and releasing energy in the process of direct current to direct current conversion; the current acquisition circuit is connected in series with the power inductor; the first metal oxide semiconductor field effect transistor is connected in series with the current acquisition circuit; one end of the first combination tube is connected with the current acquisition circuit in series, the other end of the first combination tube is connected with one end of the first capacitor, and the other end of the first capacitor is connected with the first output end; one end of the second combination tube is connected with the current acquisition circuit in series, the other end of the second combination tube is connected with one end of the second capacitor, and the other end of the second capacitor is connected with the second output end; and the control circuit is connected with the current acquisition circuit, the first metal oxide semiconductor field effect transistor, the first combination tube and the second combination tube.

Description

Technical Field

[0001] The present invention relates to the technical field of power electronics, and in particular to a circuit, a control method, a voltage source and a chip for direct current to direct current conversion. Background Art

[0002] With the rapid development of integrated circuits, key chips require more and more different voltage domains. The realization of the DC-to-DC converter (DCDC) function in related technologies requires a one-to-one correspondence between the controller and the power inductor. Each output requires an independent power inductor and control circuit, which will increase the number of components in the circuit, thereby increasing the complexity of the circuit and the overall manufacturing cost. Summary of the invention

[0003] In view of this, the present invention provides a circuit, a control method, a voltage source and a chip for DC to DC conversion to solve the problem that the realization of the DCDC function requires a one-to-one correspondence between the controller and the power inductor, and each output requires an independent power inductor and control circuit, which will lead to an increase in the number of components in the circuit, thereby increasing the complexity of the circuit and the overall manufacturing cost.

[0004] In a first aspect, the present invention provides a circuit for direct current to direct current conversion, the circuit comprising: a power inductor for storing and releasing energy during direct current to direct current conversion; a current acquisition circuit connected in series with the power inductor; a first metal oxide semiconductor field effect transistor connected in series with the current acquisition circuit; a first combination transistor, one end of the first combination transistor being connected in series with the current acquisition circuit, the other end of the first combination transistor being connected to one end of a first capacitor, the other end of the first capacitor being connected to a first output end, the first combination transistor comprising a second metal oxide semiconductor field effect transistor and a third metal oxide semiconductor field effect transistor; a second combination transistor, one end of the second combination transistor being connected in series with the current acquisition circuit, the other end of the second combination transistor being connected to one end of a second capacitor, the other end of the second capacitor being connected to a second output end, the second combination transistor comprising a fourth metal oxide semiconductor field effect transistor and a fifth metal oxide semiconductor field effect transistor; and a control circuit connected with the current acquisition circuit, the first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor.

[0005] In an optional embodiment, the circuit further includes: a third combination tube, one end of the third combination tube is connected in series with the current acquisition circuit, the other end of the third combination tube is connected to a third capacitor, the other end of the third capacitor is connected to a third output end, the third combination tube includes a sixth metal oxide semiconductor field effect tube and a seventh metal oxide semiconductor field effect tube; wherein the gate of the sixth metal oxide semiconductor field effect tube is connected to the gate of the seventh metal oxide semiconductor field effect tube, and the source of the sixth metal oxide semiconductor field effect tube is connected to the source of the seventh metal oxide semiconductor field effect tube.

[0006] In an optional implementation, the circuit further includes: a freewheeling loop, one end of which is connected in series with the current acquisition circuit, and the other end of which is connected to the power inductor.

[0007] In a second aspect, the present invention provides a method for controlling a DC to DC conversion circuit, which is applied to a circuit as described above, and the method includes: storing energy based on a power inductor; controlling a first metal oxide semiconductor field effect transistor to be turned off, controlling a first combination of transistors to be turned on, and obtaining a collection current; adjusting a first on-time of the first combination of transistors, and obtaining an output voltage of a first output terminal based on the first on-time and the collection current; controlling the first metal oxide semiconductor field effect transistor and the first combination of transistors to be turned off, controlling a second combination of transistors to be turned on, and obtaining the collection current; adjusting a second on-time of the second combination of transistors, and obtaining an output voltage of a second output terminal based on the second on-time and the collection current.

[0008] In a third aspect, the present invention provides a method for controlling a DC to DC conversion circuit, which is applied to the circuit as described above, and the method includes: storing energy based on a power inductor; controlling a first metal oxide semiconductor field effect transistor to be turned off, controlling a first combination of transistors to be turned on, and obtaining a collection current; adjusting a first on-time of the first combination of transistors, and obtaining an output voltage of a first output terminal based on the first on-time and the collection current; controlling the first metal oxide semiconductor field effect transistor and the first combination of transistors to be turned off, controlling a second combination of transistors to be turned on, and obtaining the collection current; adjusting a second on-time of the second combination of transistors, and obtaining an output voltage of a second output terminal based on the second on-time and the collection current; controlling the first metal oxide semiconductor field effect transistor, the first combination of transistors, and the second combination of transistors to be turned off, controlling a third combination of transistors to be turned on, and obtaining the collection current; adjusting a third on-time of the third combination of transistors, and obtaining an output voltage of a third output terminal based on the third on-time and the collection current.

[0009] In a fourth aspect, the present invention provides a method for controlling a DC to DC conversion circuit, which is applied to a circuit as described above, and the method includes: storing energy based on a power inductor; controlling a first metal oxide semiconductor field effect transistor to be turned off, controlling a first combination of transistors to be turned on, and obtaining a collection current; adjusting a first on-time of the first combination of transistors, and obtaining an output voltage of a first output terminal based on the first on-time and the collection current; controlling the first metal oxide semiconductor field effect transistor and the first combination of transistors to be turned off, controlling a second combination of transistors to be turned on, and obtaining the collection current; adjusting a second on-time of the second combination of transistors, and obtaining an output voltage of a second output terminal based on the second on-time and the collection current; controlling the first metal oxide semiconductor field effect transistor, the first combination of transistors, and the second combination of transistors to be turned off, and releasing the energy stored in the power inductor, and the generated current flows to the energy source terminal through a freewheeling loop.

[0010] In an optional embodiment, the method further includes: obtaining the sum of the on-times of the first on-time and the second on-time; obtaining the off-times of the first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor; and controlling the sum of the on-times to be less than the off-times.

[0011] In an optional implementation, obtaining the output voltage of the first output terminal based on the first on-time and the collected current includes: integrating the collected current with the first on-time to obtain the output voltage of the first output terminal.

[0012] In a fifth aspect, the present invention provides a voltage source for DC to DC conversion, comprising the aforementioned circuit for DC to DC conversion.

[0013] In a sixth aspect, the present invention provides a data converter chip, comprising the aforementioned circuit for DC to DC conversion.

[0014] The circuit for DC to DC conversion of this embodiment obtains the current collected by the current collection circuit through the control circuit, and controls the conduction and shutdown of the first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor, so as to obtain multiple outputs based on a single power inductor, realize the reuse of power inductors, reduce the number of components in the circuit, and reduce the complexity of the circuit and the overall manufacturing cost of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a circuit for direct current to direct current conversion provided by an embodiment of the present invention is shown;

[0017] Figure 2 is a flow chart of a method for controlling a DC to DC conversion circuit according to an embodiment of the present invention;

[0018] Figure 3 A schematic structural diagram of a device for direct current to direct current conversion according to an embodiment of the present invention is shown;

[0019] Figure 4 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] The DCDC controller of the related technology corresponds to the power inductor one by one, and each output requires an independent power inductor and control circuit, which will increase the number of components in the circuit, thereby increasing the complexity of the circuit and the overall manufacturing cost. In addition, multiple power inductors may also take up more circuit board space, which is not conducive to the miniaturization and integration of products.

[0022] According to an embodiment of the present invention, a circuit embodiment for direct current to direct current conversion is provided. Figure 1 FIG. 1 shows a schematic diagram of a circuit for direct current to direct current conversion provided by an embodiment of the present invention. Figure 1 As shown, the circuit for DC to DC conversion includes the following components:

[0023] The power inductor 101 is used to store and release energy during the DC to DC conversion process; the current collection circuit 102 is connected in series with the power inductor 101; the first metal oxide semiconductor field effect transistor 103 is connected in series with the current collection circuit 102; the first combination transistor 104, one end of the first combination transistor 104 is connected in series with the current collection circuit 102, the other end of the first combination transistor 104 is connected to one end of the first capacitor 105, the other end of the first capacitor 105 is connected to the first output terminal 106, and the first combination transistor 104 includes a second metal oxide semiconductor field effect transistor 1041 and a third A metal oxide semiconductor field effect transistor 1042; a second combination transistor 107, one end of the second combination transistor 107 is connected in series with the current acquisition circuit 102, the other end of the second combination transistor 107 is connected to one end of the second capacitor 108, the other end of the second capacitor 108 is connected to the second output end 109, the second combination transistor 107 includes a fourth metal oxide semiconductor field effect transistor 1071 and a fifth metal oxide semiconductor field effect transistor 1072; a control circuit 110, connected to the current acquisition circuit 102, the first metal oxide semiconductor field effect transistor 103, the first combination transistor 104 and the second combination transistor 107.

[0024] In this embodiment, the power inductor can change the magnitude and direction of the current to achieve current conversion and regulation. Through the energy storage and release characteristics of the power inductor, the circuit can more effectively perform voltage step-down conversion, which can improve the efficiency and stability of the conversion. Through the current acquisition circuit, the current change can be monitored in real time. The current acquisition circuit can provide accurate current information, which is helpful for the circuit to be accurately adjusted and can protect the circuit from the influence of faults such as overload. The collection current obtained by the current acquisition circuit controls the conduction time of the first combination tube. Based on Q=I*t, where I is the collection current and t is the conduction time of the first combination tube, the energy value transmitted by the first output terminal can be obtained.

[0025] Similarly, by controlling the conduction time of the second combination tube, the energy value transmitted by the second output terminal can be obtained. The two PMOS tubes in the first combination tube can be connected back to back, and the two PMOS tubes in the second combination tube can also be connected back to back.

[0026] The circuit for DC to DC conversion of this embodiment obtains the current collected by the current collection circuit through the control circuit, and controls the conduction and shutdown of the first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor, so as to obtain multiple outputs based on a single power inductor, realize the reuse of power inductors, reduce the number of components in the circuit, and reduce the complexity of the circuit and the overall manufacturing cost of the circuit.

[0027] like Figure 1As shown, in some optional embodiments, the aforementioned circuit for DC to DC conversion further includes a third combination transistor 110, one end of the third combination transistor 110 is connected in series with the current acquisition circuit 102, the other end of the third combination transistor 110 is connected to the third capacitor 111, and the other end of the third capacitor 111 is connected to the third output end 112, and the third combination transistor 110 includes a sixth metal oxide semiconductor field effect transistor 1101 and a seventh metal oxide semiconductor field effect transistor 1102; wherein the gate of the sixth metal oxide semiconductor field effect transistor 1101 is connected to the gate of the seventh metal oxide semiconductor field effect transistor 1102, and the source of the sixth metal oxide semiconductor field effect transistor 1101 is connected to the source of the seventh metal oxide semiconductor field effect transistor 1102.

[0028] In this embodiment, a metal oxide semiconductor field effect transistor (MOSFET) is used as a switching element to achieve high-efficiency power conversion. MOSFET has low on-resistance and high switching speed, thereby reducing energy loss during the switching process and improving conversion efficiency. Since the gates of the sixth metal oxide semiconductor field effect transistor 1101 and the seventh metal oxide semiconductor field effect transistor 1102 are connected and the sources are also connected, such a design facilitates synchronous control. By adjusting the switching timing of the two MOSFETs, the output voltage and current of the circuit can be flexibly controlled to meet different application requirements. The third combination transistor 110 is connected in series with the current acquisition circuit 102 and is connected to the third output terminal 112 through the third capacitor 111. This structure helps to achieve the stability of the output voltage. When the input voltage or load changes, the output voltage can be quickly adjusted by adjusting the switching duty cycle of the MOSFET to maintain its stability. Since the MOSFET has a fast switching speed, the electromagnetic interference (EMI) generated during the switching process can be reduced. In addition, through reasonable circuit layout and component selection, the EMI level of the entire circuit can be further reduced and the reliability of the system can be improved. The DC / DC converter using MOSFET as a switching element is easy to integrate into a larger system and is convenient for expansion. By increasing or modifying the number or configuration of MOSFETs in the combination tube, the performance and output capability of the circuit can be easily adjusted to suit different application scenarios.

[0029] like Figure 1 As shown, in some optional embodiments, the aforementioned circuit for DC to DC conversion further includes a freewheeling loop 113, one end of the freewheeling loop 113 is connected in series with the current acquisition circuit 102, and the other end of the freewheeling loop 113 is connected to the power inductor 101.

[0030] In this embodiment, in order to maintain the continuity of the current, the freewheeling diode in the freewheeling loop can be turned on, which can provide a loop for the current in the inductor. The inductor releases its stored energy through the freewheeling diode. In this process, the inductor converts its previously stored electrical energy into current, which flows to the energy source end or other components that require electrical energy through the freewheeling loop. Based on the energy storage and filtering function of the inductor, this current is smooth and continuous, which helps to maintain the stable operation of the circuit.

[0031] In this embodiment, a method for controlling a DC to DC conversion circuit is provided, which can be used in the above-mentioned circuit. Figure 2 is a flow chart of a method for controlling a DC to DC conversion circuit according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0032] Step S201: storing energy based on power inductance.

[0033] Step S202, controlling the first metal oxide semiconductor field effect transistor to be turned off, controlling the first combination transistor to be turned on, and obtaining the collection current.

[0034] Step S203, adjusting the first on-time of the first combination tube, and obtaining the output voltage of the first output terminal based on the first on-time and the sampled current.

[0035] Step S204, controlling the first metal oxide semiconductor field effect transistor and the first combination transistor to be turned off, controlling the second combination transistor to be turned on, and obtaining the collection current.

[0036] Step S205, adjusting the second on-time of the second combination tube, and obtaining the output voltage of the second output terminal based on the second on-time and the sampled current.

[0037] In this embodiment, energy can be obtained from a battery or an external power source, can be stored through a power inductor, and can be stored for subsequent steps. In step S202, the first metal oxide semiconductor field effect transistor is controlled to be turned off, and the first combination tube is controlled to be turned on, and the energy stored in the power inductor in step S201 is transferred to the first output terminal via the first combination tube. The transferred energy value is calculated and processed by the control chip according to the output state, following the energy formula Q=I*t, where the current I is the collection current.

[0038] In step S204, the first metal oxide semiconductor field effect transistor and the first combination transistor are controlled to be turned off, and the second combination transistor is controlled to be turned on. The power inductor energy is transferred to the second output terminal by the second combination transistor. The transferred energy value can be obtained by the control chip according to the output state calculation and processing, and also follows the energy formula of Q=I*t, where the current I is the collection current.

[0039] In this way, the system can obtain different output voltages by adjusting the conduction time of different combination tubes according to different requirements. By flexibly controlling the switch state and conduction time of the first metal oxide semiconductor field effect tube and the combination tube, the system can efficiently manage energy storage and conversion to meet different application requirements.

[0040] In this embodiment, a method for controlling a DC-to-DC conversion circuit is also provided, which can be used for the above-mentioned circuit. The method for controlling a DC-to-DC conversion circuit includes:

[0041] Step S301, storing energy based on power inductance;

[0042] Step S302, control the first metal oxide semiconductor field effect tube to be turned off, control the first combination tube to be turned on, and obtain the collection current; for details, please refer to Figure 2 Step S202 of the illustrated embodiment will not be described in detail here.

[0043] Step S303, adjusting the first conduction time of the first combination tube, and obtaining the output voltage of the first output terminal based on the first conduction time and the collected current; see Figure 2 Step S203 of the illustrated embodiment will not be described in detail here.

[0044] Step S304, control the first metal oxide semiconductor field effect transistor and the first combination transistor to be turned off, control the second combination transistor to be turned on, and obtain the collection current; for details, please refer to Figure 2 Step S204 of the illustrated embodiment will not be described in detail here.

[0045] Step S305, adjusting the second conduction time of the second combination tube, and obtaining the output voltage of the second output terminal based on the second conduction time and the collected current; see Figure 2 Step S205 of the illustrated embodiment will not be described in detail here.

[0046] Step S306, controlling the first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor to be turned off, controlling the third combination transistor to be turned on, and obtaining the collection current;

[0047] Step S307, adjusting the third conduction time of the third combination tube, and obtaining the output voltage of the third output terminal based on the third conduction time and the sampled current.

[0048] In this embodiment, in step S306, the first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor are controlled to be turned off, and the third combination transistor is controlled to be turned on, and the power inductor energy is transferred to the third output terminal by the third combination transistor. The transferred energy value can be obtained by the control chip according to the output state calculation and processing, and also follows the energy formula Q=I*t, where the current I is the collection current.

[0049] In this way, three-way output can be achieved, further improving the reuse rate of the power inductor.

[0050] In this embodiment, a method for controlling a DC-to-DC conversion circuit is also provided, which can be used for the above-mentioned circuit. The method for controlling a DC-to-DC conversion circuit includes:

[0051] Step S401, storing energy based on power inductance;

[0052] Step S402, controlling the first metal oxide semiconductor field effect transistor to be turned off, controlling the first combination transistor to be turned on, and obtaining the collection current;

[0053] Step S403, adjusting the first conduction time of the first combination tube, and obtaining an output voltage of the first output terminal based on the first conduction time and the collected current;

[0054] Step S404, controlling the first metal oxide semiconductor field effect transistor and the first combination transistor to be turned off, and controlling the second combination transistor to be turned on, to obtain the collection current;

[0055] Step S405, adjusting the second on-time of the second combination transistor, and obtaining an output voltage of the second output terminal based on the second on-time and the collected current;

[0056] Step S406, controlling the first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor to be turned off, releasing the energy stored in the power inductor, and the generated current flows to the energy source end through the freewheeling loop.

[0057] In this embodiment, in order to maintain the continuity of the current, the freewheeling diode in the freewheeling loop can be turned on, which can provide a loop for the current in the inductor. The inductor releases its stored energy through the freewheeling diode. In this process, the inductor converts its previously stored electrical energy into current, which flows to the energy source end or other components that require electrical energy through the freewheeling loop. Based on the energy storage and filtering function of the inductor, this current is smooth and continuous, which helps to maintain the stable operation of the circuit.

[0058] In some optional embodiments, the method for controlling a DC to DC conversion circuit further includes: obtaining the sum of the on-times of the first on-time and the second on-time; obtaining the off-times of the first metal oxide semiconductor field effect transistor, the first combination transistor, and the second combination transistor; and controlling the sum of the on-times to be less than the off-time.

[0059] In this embodiment, the first on time and the second on time can be controlled by the control circuit. For the first combination tube and the second combination tube, the off time of the entire combination tube can be determined by monitoring the states of the components in the combination tube.

[0060] Controlling the sum of the on-times to be less than the off-time helps ensure that the switching elements in the circuit have enough time to fully shut down and recover when in the off state, thereby avoiding current leakage or voltage instability caused by the incomplete shutdown of the switching elements. This control strategy can significantly improve the stability and reliability of the circuit. By accurately controlling the sum of the on-times to be less than the off-time, the working state of the switching elements can be optimized, unnecessary energy loss can be reduced, and the efficiency of the entire circuit can be improved. This efficiency improvement is of great significance for energy saving and reducing energy consumption. The rapid switching action of the switching elements will generate electromagnetic interference, which may have adverse effects on other components in the circuit or surrounding equipment. By controlling the sum of the on-times to be less than the off-time, the speed of the switching action can be slowed down, thereby reducing the level of electromagnetic interference. This helps to improve the electromagnetic compatibility of the circuit and improve the reliability of the entire system.

[0061] In some optional implementations, obtaining the output voltage of the first output terminal based on the first on-time and the collected current includes: integrating the collected current with the first on-time to obtain the output voltage of the first output terminal.

[0062] In this embodiment, during the energy storage process of the power inductor, the current increases linearly through the inductor, and the energy stored in the power inductor also increases accordingly. By integrating the collected current with the first conduction time, we can obtain a voltage value corresponding to this current, that is, the output voltage of the first output terminal. The integration operation can be completed by an analog circuit or a digital circuit. In an analog circuit, an integrator circuit (such as an integration circuit composed of an operational amplifier) ​​can be used to realize the integration of the current. In a digital circuit, the output voltage can be obtained by numerically integrating the collected current data (such as using an accumulator or a digital integrator).

[0063] In this way, by integrating the current, the total amount of inductor energy stored during the first conduction time can be accurately calculated, and the output voltage can be accurately obtained. This method improves the accuracy of voltage control, allowing the power electronic system to work more stably and reliably. Secondly, this method has a faster dynamic response speed. Since the integral operation directly calculates the cumulative effect of the current change over time, it can reflect the current change in real time and quickly adjust the output voltage to adapt to the load or input voltage changes. This fast response characteristic is particularly important for occasions where frequent voltage adjustment is required or sudden load changes are required. Finally, by accurately controlling the current and integrating the operation, the conduction and shutdown process of the power tube can be optimized, reducing overshoot and energy loss. Especially in high-frequency and high-power application scenarios, this method can significantly reduce the loss of the power tube and improve the energy efficiency of the entire system.

[0064] In the present embodiment, a device for direct current to direct current conversion is also provided, and the device is used to implement the above-mentioned embodiments and preferred embodiments, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware is also possible and conceived.

[0065] Figure 3 FIG. 1 is a schematic diagram showing a structure of a device for DC to DC conversion according to an embodiment of the present invention. This embodiment provides a device for DC to DC conversion, such as Figure 3 As shown, including:

[0066] The energy storage module 301 is used to store energy based on power inductors.

[0067] The first control module 302 is used to control the first metal oxide semiconductor field effect transistor to turn off, control the first combination of transistors to turn on, and obtain the collection current; adjust the first on-time of the first combination of transistors, and obtain the output voltage of the first output terminal based on the first on-time and the collection current.

[0068] The second module 303 is used to control the first metal oxide semiconductor field effect transistor and the first combination transistor to be turned off, control the second combination transistor to be turned on, and obtain the collection current; adjust the second on-time of the second combination transistor, and obtain the output voltage of the second output terminal based on the second on-time and the collection current.

[0069] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0070] The device for DC to DC conversion of this embodiment obtains the current collected by the current collection circuit through the control circuit, and controls the conduction and shutdown of the first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor, so as to obtain multiple outputs based on a single power inductor, realize the reuse of power inductors, reduce the number of components in the circuit, reduce the complexity of the circuit and reduce the overall manufacturing cost of the circuit.

[0071] The device for DC to DC conversion in this embodiment is presented in the form of a functional unit, where the unit refers to an application specific integrated circuit (ASIC) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0072] The embodiment of the present invention also provides a computer device having the above Figure 3The device shown is used for DC to DC conversion.

[0073] See also Figure 4 , Figure 4 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 4 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in or on the memory to display graphical information of a graphical user interface on an external input / output device (such as a display device coupled to an interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 4 A processor 10 is taken as an example.

[0074] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0075] The aforementioned memory 20 stores instructions executable by at least one processor 10, so that the aforementioned at least one processor 10 executes the method shown in the above embodiment.

[0076] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0077] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0078] The computer device also includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0079] The input device 30 can receive input digital or character information, and generate key signal input related to the user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator rod, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 may include a display device, an auxiliary lighting device (such as a light emitting diode) and a tactile feedback device (such as a vibration motor), etc. The above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0080] The computer device of this embodiment obtains the current collected by the current collection circuit through the control circuit, and controls the conduction and shutdown of the first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor, so as to obtain multiple outputs based on a single power inductor, realize the reuse of the power inductor, reduce the number of components in the circuit, reduce the complexity of the circuit and reduce the overall manufacturing cost of the circuit.

[0081] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0082] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0083] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A circuit for direct current to direct current conversion, characterized in that The circuit comprises: Power inductors are used to store and release energy during DC to DC conversion; A current collection circuit is connected in series with the power inductor; A first metal oxide semiconductor field effect transistor is connected in series with the current collection circuit; A first combination of transistors, one end of which is connected in series with the current acquisition circuit, the other end of which is connected with one end of a first capacitor, the other end of which is connected with a first output end, the first combination of transistors comprising a second metal oxide semiconductor field effect transistor and a third metal oxide semiconductor field effect transistor; a second combination of transistors, one end of which is connected in series with the current acquisition circuit, the other end of which is connected with one end of a second capacitor, the other end of which is connected with a second output end, the second combination of transistors comprising a fourth metal oxide semiconductor field effect transistor and a fifth metal oxide semiconductor field effect transistor; The control circuit is connected to the current acquisition circuit, the first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor.

2. The circuit according to claim 1, characterized in that The circuit further comprises: A third combination of transistors, one end of which is connected in series with the current acquisition circuit, the other end of which is connected with a third capacitor, the other end of which is connected with a third output terminal, and the third combination of transistors includes a sixth metal oxide semiconductor field effect transistor and a seventh metal oxide semiconductor field effect transistor; The gate of the sixth metal oxide semiconductor field effect transistor is connected to the gate of the seventh metal oxide semiconductor field effect transistor, and the source of the sixth metal oxide semiconductor field effect transistor is connected to the source of the seventh metal oxide semiconductor field effect transistor.

3. The circuit according to claim 1 or 2, characterized in that: The circuit further comprises: A freewheeling loop, one end of which is connected in series with the current acquisition circuit, and the other end of which is connected with the power inductor.

4. A method for controlling a DC to DC conversion circuit, characterized in that: Applied to the circuit as claimed in any one of claims 1 to 3, the method comprises: Energy storage based on power inductors; Controlling the first metal oxide semiconductor field effect transistor to be turned off, controlling the first combination transistor to be turned on, and obtaining the collection current; Adjusting a first conduction time of the first combination tube, and obtaining an output voltage of a first output terminal based on the first conduction time and the collected current; Controlling the first metal oxide semiconductor field effect transistor and the first combination transistor to be turned off, and controlling the second combination transistor to be turned on, to obtain the collection current; The second conduction time of the second combination tube is adjusted, and the output voltage of the second output terminal is obtained based on the second conduction time and the collected current.

5. A method for controlling a DC to DC conversion circuit, characterized in that: Applied to the circuit as claimed in claim 2, the method comprises: Energy storage based on power inductors; Controlling the first metal oxide semiconductor field effect transistor to be turned off, controlling the first combination transistor to be turned on, and obtaining the collection current; Adjusting a first conduction time of the first combination tube, and obtaining an output voltage of a first output terminal based on the first conduction time and the collected current; Controlling the first metal oxide semiconductor field effect transistor and the first combination transistor to be turned off, and controlling the second combination transistor to be turned on, to obtain the collection current; Adjusting a second on-time of the second combination tube, and obtaining an output voltage of a second output terminal based on the second on-time and the collected current; Controlling the first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor to be turned off, and controlling the third combination transistor to be turned on, to obtain the collection current; The third conduction time of the third combination tube is adjusted, and the output voltage of the third output terminal is obtained based on the third conduction time and the collected current.

6. A method for controlling a DC to DC conversion circuit, characterized in that: Applied to the circuit as claimed in claim 3, the method comprises: Energy storage based on power inductors; Controlling the first metal oxide semiconductor field effect transistor to be turned off, controlling the first combination transistor to be turned on, and obtaining the collection current; Adjusting a first conduction time of the first combination tube, and obtaining an output voltage of a first output terminal based on the first conduction time and the collected current; Controlling the first metal oxide semiconductor field effect transistor and the first combination transistor to be turned off, and controlling the second combination transistor to be turned on, to obtain the collection current; Adjusting a second on-time of the second combination tube, and obtaining an output voltage of a second output terminal based on the second on-time and the collected current; The first metal oxide semiconductor field effect transistor, the first combination transistor and the second combination transistor are controlled to be turned off, so as to release the energy stored in the power inductor, and the generated current flows to the energy source end through the freewheeling loop.

7. The method according to claim 6, characterized in that The method further comprises: Obtaining a sum of the first on-time and the second on-time; Obtaining a shutdown duration of the first metal oxide semiconductor field effect transistor, the first combination transistor, and the second combination transistor; The sum of the on-time durations is controlled to be smaller than the off-time durations.

8. The method according to claim 6 or 7, characterized in that: The obtaining an output voltage of a first output terminal based on the first conduction time and the collected current includes: The collected current is integrated along the first conduction time to obtain an output voltage of the first output terminal.

9. A voltage source for direct current to direct current conversion, characterized in that A circuit for direct current to direct current conversion comprising any one of claims 1 to 3.

10. A data converter chip, characterized in that: A circuit for direct current to direct current conversion comprising any one of claims 1 to 3.

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