Direct-current conversion control circuit, direct-current conversion circuit, and electronic device

Abstract

The application discloses a direct current conversion control circuit, a direct current conversion circuit and electronic equipment, and relates to the technical field of power supplies. The direct current conversion control circuit comprises: a first integration circuit, which outputs a gate-source voltage integral signal of a high-side switch tube to a window comparator; a second integration circuit, which outputs a gate-source voltage integral signal of a low-side switch tube to the window comparator; a current detection circuit, which detects an inductor current; and a window comparison circuit, which outputs a pulse control signal, and a pulse driving module of the direct current conversion circuit controls the conduction or turn-off of a power switch tube of the direct current conversion circuit according to the pulse control signal. Through the power supply circuit and the method disclosed in the embodiment of the application, the current can be adjusted in the next switching period of the power tube according to the change of the load demand current, the response speed of the current adjustment is fast, the circuit is simplified, and no additional magnetic element needs to be added.

Description

Technical Field

[0001] This invention relates to the field of power supply technology, and in particular to DC-DC conversion control circuits, DC-DC conversion circuits, and electronic equipment. Background Technology

[0002] DC-DC converters are commonly used voltage conversion modules in power management systems. They transform the input DC voltage into the DC voltage required by the power system for use by electronic devices. Polynomial DC-DC converters are a common type, offering higher stability and conversion efficiency. However, due to inherent topology limitations, their application involves current sharing issues. Fluctuations in the output current can cause instability in electronic devices, affecting normal system operation. Addressing these issues with polynomial DC-DC converters requires a long settling time with a high-precision controller, making it unsuitable for applications with high real-time requirements. Using compensation schemes increases system complexity, while adding inductors introduces electromagnetic compatibility problems. Furthermore, all three approaches undoubtedly increase system cost. Summary of the Invention

[0003] To address the issue of insufficient load current response speed in existing DC-DC conversion circuits, the present invention employs the following technical solution:

[0004] In a first aspect, a DC-DC conversion control circuit is provided for controlling the on / off state of a power switch transistor in a DC-DC conversion circuit to adjust the current required by the output load of the DC-DC conversion circuit. The power switch transistor includes a first transistor and a second transistor. The DC-DC conversion control circuit includes:

[0005] The first integrating circuit has its first input terminal electrically connected to the gate of the first transistor of the DC-DC converter circuit, its second input terminal electrically connected to the source of the first transistor, and its output terminal electrically connected to the first window input terminal of the window comparator.

[0006] The second integrating circuit has its first input terminal electrically connected to the gate of the second transistor of the DC-DC converter, its second input terminal electrically connected to the source of the second transistor, and its output terminal electrically connected to the second window input terminal of the window comparator.

[0007] The current detection circuit has its first detection input terminal electrically connected to one end of the inductor of the DC-DC converter circuit, its second detection input terminal electrically connected to the other end of the inductor, and its detection output terminal electrically connected to the third window input terminal of the window comparator. One end of the inductor is electrically connected to the drain of the second transistor, and the other end of the inductor serves as the output terminal of the DC-DC converter circuit.

[0008] The window comparator circuit outputs a pulse control signal at its window output terminal. The pulse drive module of the DC-DC converter circuit controls the power switch of the DC-DC converter circuit to turn on or off according to the pulse control signal.

[0009] Furthermore, the first integrating circuit includes: a first operational amplifier, a first resistor, and a first capacitor;

[0010] The first input terminal of the first operational amplifier is electrically connected to one end of the first resistor, and the other end of the first resistor serves as the first input terminal of the first integrating circuit.

[0011] The first input terminal of the first operational amplifier is also electrically connected to one end of the first capacitor, and the other end of the first capacitor is electrically connected to the output terminal of the first operational amplifier. The output terminal of the first operational amplifier serves as the output terminal of the first integrating circuit.

[0012] The second input terminal of the first operational amplifier serves as the second input terminal of the first integrator circuit.

[0013] Furthermore, the second integrating circuit includes: a second operational amplifier, a second resistor, and a second capacitor;

[0014] The first input terminal of the second operational amplifier is electrically connected to one end of the second resistor, and the other end of the second resistor serves as the first input terminal of the second integrator circuit.

[0015] The first input terminal of the second operational amplifier is also electrically connected to one end of the second capacitor, and the other end of the second capacitor is electrically connected to the output terminal of the second operational amplifier. The output terminal of the second operational amplifier serves as the output terminal of the second integrator circuit.

[0016] The second input terminal of the second operational amplifier serves as the second input terminal of the second integrator circuit.

[0017] Furthermore, the current detection circuit includes: a third operational amplifier;

[0018] The first input terminal of the third operational amplifier is used as the first detection input terminal and is electrically connected to one end of the inductor;

[0019] The second input terminal of the third operational amplifier is used as the second detection input terminal and is electrically connected to the other end of the inductor;

[0020] The output terminal of the third operational amplifier is used as the detection output terminal and is electrically connected to the input terminal of the third window.

[0021] Furthermore, the window comparator circuit includes: a fourth operational amplifier and a fifth operational amplifier;

[0022] The first input terminal of the fourth operational amplifier is used as the first window input terminal;

[0023] The second input terminal of the fifth operational amplifier is used as the second window input terminal;

[0024] The second input terminal of the fourth operational amplifier is electrically connected to the first input terminal of the fifth operational amplifier to serve as the third window input terminal;

[0025] The output terminals of the fourth and fifth operational amplifiers are electrically connected to form the window output terminal.

[0026] In a second aspect, a DC-DC converter circuit is provided, including at least one DC-DC converter sub-circuit, the DC-DC converter sub-circuit including the DC-DC converter control circuit described in the first aspect above;

[0027] At least one DC-DC converter sub-circuit is electrically connected to the input of the DC-DC converter circuit;

[0028] The output of at least one DC-DC converter sub-circuit is electrically connected to the output of the DC-DC converter circuit.

[0029] Furthermore, the DC-DC converter sub-circuit includes: a first transistor, a second transistor, an inductor, a pulse drive module, and a DC-DC conversion control circuit;

[0030] The source of the first transistor serves as the input terminal of the DC-DC converter circuit, and its drain is electrically connected to the drain of the second transistor and then electrically connected to one end of the inductor.

[0031] The second transistor has its source grounded;

[0032] An inductor, with its other end serving as the output terminal of a DC-DC converter circuit;

[0033] A pulse drive module, wherein its signal input terminal is electrically connected to the window output terminal, its first pulse output terminal is electrically connected to the gate of the first transistor, and its second pulse output terminal is electrically connected to the gate of the second transistor;

[0034] The DC-DC conversion control circuit includes: a first integrating circuit, wherein the first input terminal of the first integrating circuit is electrically connected to the gate of the first transistor of the DC-DC conversion circuit, the second input terminal of the first integrating circuit is electrically connected to the source of the first transistor, and the output terminal of the first integrating circuit is electrically connected to the first window input terminal of the window comparator.

[0035] The second integrating circuit has its first input terminal electrically connected to the gate of the second transistor of the DC-DC converter, its second input terminal electrically connected to the source of the second transistor, and its output terminal electrically connected to the second window input terminal of the window comparator.

[0036] The current detection circuit has its first detection input terminal electrically connected to one end of the inductor of the DC-DC converter circuit, its second detection input terminal electrically connected to the other end of the inductor, and its detection output terminal electrically connected to the third window input terminal of the window comparator. One end of the inductor is electrically connected to the drain of the second transistor, and the other end of the inductor serves as the output terminal of the DC-DC converter circuit.

[0037] The window comparator circuit outputs a pulse control signal at its window output terminal. The pulse drive module of the DC-DC converter circuit controls the power switch of the DC-DC converter circuit to turn on or off according to the pulse control signal.

[0038] Furthermore, the first transistor is a P-channel power MOSFET, and the second transistor is an N-channel power MOSFET.

[0039] Furthermore, the DC-DC conversion circuit also includes: a third capacitor;

[0040] One end of the third capacitor is electrically connected to the output terminal of the DC-DC converter circuit;

[0041] The other end of the third capacitor is grounded.

[0042] Thirdly, an electronic device is provided, comprising the DC-DC conversion circuit described in the second aspect above.

[0043] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows:

[0044] 1. By implementing the power supply circuit and method disclosed in the embodiments of the present invention, the current can be adjusted in the next switching cycle of the power transistor in response to changes in the load demand current, and the response speed of the current adjustment is fast.

[0045] 2. The circuit structure is simple and requires no additional magnetic components;

[0046] 3. Circuit integration can effectively control circuit size. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of a DC-DC conversion control circuit module provided in an embodiment of the present invention;

[0049] Figure 2This is a schematic diagram of a DC-DC conversion control circuit provided in an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of a DC-DC conversion circuit provided in an embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of a DC-DC converter sub-circuit provided in an embodiment of the present invention;

[0052] Figure 5 This is a schematic diagram of power switch adjustment when the load demand current increases, provided in an embodiment of the present invention.

[0053] Figure 6 This is a schematic diagram of power switch adjustment when the load demand current decreases, provided in an embodiment of the present invention. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0055] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The numbers in the accompanying drawings are only used to distinguish individual functional parts or modules and do not indicate logical relationships between parts or modules. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the term encompasses the element or object listed following the term and its equivalents, without excluding other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. “Above,” “below,” “left,” “right,” etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0056] The various embodiments according to this disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that in the drawings, the same reference numerals are assigned to components having substantially the same or similar structure and function, and repeated descriptions of them will be omitted.

[0057] To address the issue of insufficient current response speed in DC-DC converter circuits under load requirements in existing technologies, this invention provides the following implementation method:

[0058] In some embodiments, such as Figure 1 As shown, a DC-DC conversion control circuit is used to control the power switching transistors of the DC-DC conversion circuit to turn on or off, thereby adjusting the current required by the output load of the DC-DC conversion circuit. The power switching transistors include a first transistor T1 and a second transistor T2. The DC-DC conversion control circuit includes:

[0059] First integrating circuit I1, first input terminal I of first integrating circuit I1 11 The gate of the first transistor T1 in the DC-DC converter circuit is electrically connected to the second input terminal I of the first integrator circuit I1. 12 Electrically connected to the source of the first transistor T1, the first integrator I1 output terminal I 1O The first window input terminal W of the window comparator WIN I1 Electrical connection;

[0060] The second integrating circuit I2, the first input terminal of the second integrating circuit I2 21 The gate of the second transistor T2 in the DC-DC converter circuit is electrically connected to the second input terminal I of the second integrator circuit I2. 22 Electrically connected to the source of the second transistor, the output terminal I of the second integrator circuit I2 is... 2O The second window input terminal W of the window comparator WIN I2 Electrical connection;

[0061] The current detection circuit DET, the first detection input terminal D of the current detection circuit DET I1 One end of the inductor L in the DC-DC converter circuit is electrically connected to the second detection input terminal D of the current detection circuit DET. I2 Electrically connected to the other end of inductor L, the detection output terminal D of the current detection circuit DET O The third window input terminal W of the window comparator WIN I3 Electrical connection, wherein one end of inductor L is electrically connected to the drain of the second transistor T2, and the other end of inductor L serves as the output terminal of the DC-DC conversion circuit;

[0062] The window comparator circuit WIN, and the window output terminal W of the window comparator circuit WIN. O The output pulse control signal is used by the pulse drive module PWMD of the DC-DC converter circuit to control the power switching transistor of the DC-DC converter circuit to turn on or off according to the pulse control signal.

[0063] The DC-DC conversion control circuit disclosed in this embodiment of the invention is applicable to buck DC-DC conversion circuits.

[0064] Specifically, such as Figure 2 As shown, the first integrating circuit I1 includes: a first operational amplifier OPA1, a first resistor R1, and a first capacitor C1;

[0065] The first input terminal of the first operational amplifier OPA1 is electrically connected to one end of the first resistor R1, and the other end of the first resistor R1 serves as the first input terminal I of the first integrator circuit. 11 ;

[0066] The first input terminal of the first operational amplifier is also electrically connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is electrically connected to the output terminal of the first operational amplifier OPA1. The output terminal of the first operational amplifier serves as the output terminal I of the first integrating circuit. 1O ;

[0067] The first operational amplifier OPA1's second input terminal serves as the second input terminal of the first integrating circuit. 12 .

[0068] The first input terminal of the first operational amplifier is the inverting input terminal of the first operational amplifier, and the second input terminal of the first operational amplifier is the non-inverting input terminal of the first operational amplifier.

[0069] An integrator circuit is a circuit that makes the output signal proportional to the time integral of the input signal. The output voltage of the first operational amplifier OPA1 can be expressed as:

[0070]

[0071] Among them, U 1O U represents the output voltage of the first operational amplifier OPA1. 1I This represents the voltage at the inverting input terminal of the first operational amplifier OPA1.

[0072] The second integrating circuit I2 includes: a second operational amplifier OPA2, a second resistor R2, and a second capacitor C2;

[0073] The first input terminal of the second operational amplifier OPA2 is electrically connected to one end of the second resistor R2, and the other end of the second resistor R2 serves as the first input terminal I of the second integrator circuit. 21 ;

[0074] The first input terminal of the second operational amplifier is also electrically connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is electrically connected to the output terminal of the second operational amplifier OPA2. The output terminal of the second operational amplifier serves as the output terminal I of the second integrator circuit. 2O ;

[0075] The second input terminal of the second operational amplifier OPA2 serves as the second input terminal of the second integrator circuit. 22 .

[0076] The first input terminal of the second operational amplifier is the inverting input terminal of the second operational amplifier, and the second input terminal of the second operational amplifier is the non-inverting input terminal of the second operational amplifier.

[0077] The output voltage of the second operational amplifier OPA2 can be expressed as:

[0078]

[0079] Among them, U 2O U represents the output voltage of the first operational amplifier OPA2. 2I This represents the voltage at the inverting input terminal of the first operational amplifier OPA2.

[0080] The current detection circuit DET includes: a third operational amplifier OPA3;

[0081] The first input terminal of the third operational amplifier OPA3 is used as the first detection input terminal D. I1 It is electrically connected to one end of the inductor L;

[0082] The second input terminal of the third operational amplifier OPA3 is used as the second detection input terminal D. I2 It is electrically connected to the other end of the inductor L;

[0083] The output terminal of the third operational amplifier OPA3 is used as the detection output terminal D. O , and the third window input terminal W I3 Electrical connection.

[0084] The first input terminal of the third operational amplifier is the inverting input terminal of the third operational amplifier, and the second input terminal of the third operational amplifier is the non-inverting input terminal of the third operational amplifier. The first and second input terminals of the third operational amplifier are connected in parallel across the two ends of the inductor L. When the DC-DC converter circuit is working normally, the current in the inductor L flows from one end of the inductor L connected to the first input terminal of the third operational amplifier to the other end of the inductor L connected to the second input terminal of the third operational amplifier, so that the third operational amplifier OPA3 can detect the current signal of the inductor L.

[0085] The window comparator circuit WIN includes: the fourth operational amplifier OPA4 and the fifth operational amplifier OPA5;

[0086] The first input terminal of the fourth operational amplifier OPA4 is used as the first window input terminal W. I1 ;

[0087] The second input terminal of the fifth operational amplifier OPA5 is used as the second window input terminal W. I2 ;

[0088] The second input terminal of the fourth op-amp of the fourth operational amplifier OPA4 is electrically connected to the first input terminal of the fifth op-amp of the fifth operational amplifier OPA5, and then serves as the third window input terminal W. I3 ;

[0089] The output terminals of the fourth and fifth operational amplifiers are electrically connected to form the window output terminal W. O .

[0090] The first input terminal of the fourth operational amplifier is the inverting input terminal of the fourth operational amplifier, and the second input terminal of the fourth operational amplifier is the non-inverting input terminal of the fourth operational amplifier; the first input terminal of the fifth operational amplifier is the inverting input terminal of the fifth operational amplifier, and the second input terminal of the fifth operational amplifier is the non-inverting input terminal of the fifth operational amplifier.

[0091] Window output terminal W O The output logic level rules are as follows:

[0092] When the third window input terminal W I3 The signal is less than the input terminal W of the first window. I1 When a signal is received, the output is low.

[0093] When the third window input terminal W I3 The signal is greater than the input terminal W of the second window. I2 When a signal is received, the output is low.

[0094] When the third window input terminal W I3 The signal is greater than the input terminal W of the first window. I1 And smaller than the second window input W I2 When a signal is received, the output is high.

[0095] In other embodiments, a DC-DC converter circuit includes at least one DC-DC converter sub-circuit, which includes the DC-DC converter control circuit described in Embodiment 2.

[0096] like Figure 3 As shown, the input terminal of at least one DC-DC converter sub-circuit is electrically connected to the input terminal V of the DC-DC converter circuit. IN ;

[0097] The output of at least one DC-DC converter sub-circuit is electrically connected to the output V of the DC-DC converter circuit. OUT .

[0098] In other embodiments, the unidirectional DC-DC converter circuit includes a DC-DC converter sub-circuit, such as... Figure 4As shown, the DC-DC converter sub-circuit includes: a first transistor T1, a second transistor T2, an inductor L, a pulse drive module PWMD, and the DC-DC conversion control circuit described in Embodiment 2.

[0099] The first transistor T1 has its source as the input terminal of the DC-DC converter circuit. The drain of the first transistor T1 is electrically connected to the drain of the second transistor T2 and then electrically connected to one end of the inductor L.

[0100] The source of the second transistor T2 is grounded;

[0101] The other end of the inductor L serves as the output terminal of the DC-DC converter circuit;

[0102] The pulse drive module PWMD, the signal input terminal and window output terminal W of the pulse drive module PWMD. O Electrically connected, the first pulse output terminal of the pulse drive module PWMD is electrically connected to the gate of the first transistor T1, and the second pulse output terminal of the pulse drive module PWMD is electrically connected to the gate of the second transistor T2.

[0103] The DC-DC conversion control circuit includes: a first integrating circuit I1, and a first input terminal I of the first integrating circuit I1. 11 The gate of the first transistor T1 in the DC-DC converter circuit is electrically connected to the second input terminal I of the first integrator circuit I1. 12 Electrically connected to the source of the first transistor T1, the first integrator I1 output terminal I 1O The first window input terminal W of the window comparator WIN I1 Electrical connection;

[0104] The second integrating circuit I2, the first input terminal of the second integrating circuit I2 21 The gate of the second transistor T2 in the DC-DC converter circuit is electrically connected to the second input terminal I of the second integrator circuit I2. 22 Electrically connected to the source of the second transistor, the output terminal I of the second integrator circuit I2 is... 2O The second window input terminal W of the window comparator WIN I2 Electrical connection;

[0105] The current detection circuit DET, the first detection input terminal D of the current detection circuit DET I1 One end of the inductor L in the DC-DC converter circuit is electrically connected to the second detection input terminal D of the current detection circuit DET. I2 Electrically connected to the other end of inductor L, the detection output terminal D of the current detection circuit DET O The third window input terminal W of the window comparator WINI3 Electrical connection, wherein one end of inductor L is electrically connected to the drain of the second transistor T2, and the other end of inductor L serves as the output terminal of the DC-DC conversion circuit;

[0106] The current sensing circuit DET acquires the current signal from inductor L. Since the inductor is a current storage element, the circuit detects the voltage difference across its terminals and compares it with the gate-source voltages of the first transistor T1 and the second transistor T2 at different times to determine if the inductor's stored energy is sufficient to support the load's current demand. This allows for rapid adjustment of the inductor current to meet the load's current requirements. It can also detect instantaneous load withdrawal or discharge in advance. The specific execution logic of the current sensing circuit will be explained in detail below, in conjunction with the control logic of the DC-DC conversion control circuit.

[0107] The window comparator circuit WIN, and the window output terminal W of the window comparator circuit WIN. O The output pulse control signal enables the pulse drive module of the DC-DC converter circuit to control the power switching transistor of the DC-DC converter circuit to turn on or off according to the pulse control signal.

[0108] The first transistor T1 is a P-channel power MOSFET, and the second transistor T2 is an N-channel power MOSFET.

[0109] Preferably, the DC-DC conversion circuit further includes: a third capacitor C3;

[0110] One end of the third capacitor C3 is electrically connected to the output terminal of the DC-DC converter circuit;

[0111] The other end of the third capacitor C3 is grounded.

[0112] The output voltage can be stabilized by using the third capacitor C3.

[0113] In other embodiments, the polynomial DC-DC converter circuit includes two or more DC-DC converter sub-circuits, such as... Figure 3 As shown, each DC-DC converter sub-circuit is as follows: Figure 4 As shown, it includes: a first transistor T1, a second transistor T2, an inductor L, a pulse drive module PWMD, and the DC-DC conversion control circuit described in Embodiment 2.

[0114] The first transistor T1 has its source as the input terminal of the DC-DC converter circuit. The drain of the first transistor T1 is electrically connected to the drain of the second transistor T2 and then electrically connected to one end of the inductor L.

[0115] The source of the second transistor T2 is grounded;

[0116] The other end of the inductor L serves as the output terminal of the DC-DC converter circuit;

[0117] The pulse drive module PWMD, the signal input terminal and window output terminal W of the pulse drive module PWMD. O Electrically connected, the first pulse output terminal of the pulse drive module PWMD is electrically connected to the gate of the first transistor T1, and the second pulse output terminal of the pulse drive module PWMD is electrically connected to the gate of the second transistor T2.

[0118] The DC-DC conversion control circuit includes: a first integrating circuit I1, and a first input terminal I of the first integrating circuit I1. 11 The gate of the first transistor T1 in the DC-DC converter circuit is electrically connected to the second input terminal I of the first integrator circuit I1. 12 Electrically connected to the source of the first transistor T1, the first integrator I1 output terminal I 1O The first window input terminal W of the window comparator WIN I1 Electrical connection;

[0119] The second integrating circuit I2, the first input terminal of the second integrating circuit I2 21 The gate of the second transistor T2 in the DC-DC converter circuit is electrically connected to the second input terminal I of the second integrator circuit I2. 22 Electrically connected to the source of the second transistor, the output terminal I of the second integrator circuit I2 is... 2O The second window input terminal W of the window comparator WIN I2 Electrical connection;

[0120] The current detection circuit DET, the first detection input terminal D of the current detection circuit DET I1 One end of the inductor L in the DC-DC converter circuit is electrically connected to the second detection input terminal D of the current detection circuit DET. I2 Electrically connected to the other end of inductor L, the detection output terminal D of the current detection circuit DET O The third window input terminal W of the window comparator WIN I3 Electrical connection, wherein one end of inductor L is electrically connected to the drain of the second transistor T2, and the other end of inductor L serves as the output terminal of the DC-DC conversion circuit.

[0121] The window comparator circuit WIN, and the window output terminal W of the window comparator circuit WIN. O The output pulse control signal enables the pulse drive module of the DC-DC converter circuit to control the power switching transistor of the DC-DC converter circuit to turn on or off according to the pulse control signal.

[0122] The following section, with reference to the accompanying diagram, will explain how the DC-DC converter control circuit adjusts the inductor current to meet the load's current requirements.

[0123] Figure 5 Chinese V GS1 V GS2 These correspond to the gate drive voltages of the first and second transistors. It should be noted that: Figure 5 The high level indicates that the transistor is turned on, and the low level indicates that the transistor is turned off. However, the actual driving voltage needs to be applied depending on the type of transistor.

[0124] During the P1 period, such as Figure 5 As shown, the output load is in a steady state, and the first transistor maintains a steady-state duty cycle. Starting from period P2, the current demand of the output load increases sharply. The first integrator circuit integrates the gate-source voltage of the first transistor and compares it with the current flowing through the inductor. The comparison result serves as the basis for determining the off-time of the first transistor during the current conduction cycle. Since the average current during period P1 can be calculated by integrating the current, this average current needs to exceed the load demand current. By detecting the inductor current and determining whether the aforementioned current demand is met, the conduction time of the first transistor during period P1 can be determined. If the load current demand increases, the conduction time of the second transistor T2 is shortened, allowing the first transistor to enter the next conduction cycle as soon as possible, supplying power from the input terminal, thus increasing the average current level flowing through the inductor. Conversely, if the load current demand decreases, the conduction time of the second transistor T2 is extended, reducing the average current level flowing through the inductor.

[0125] During the P3 period, such as Figure 5 As shown, the current demanded by the output load increases at the same slope. The current detection circuit detects the increase in inductor current. Since the load demand current continues to rise, the average current level flowing through the inductor is increased by extending the conduction time of the first transistor, so that the average current level flowing through the inductor approaches the load demand current requirement.

[0126] During the P4 period, the current demanded by the output load increases at the same slope. The current detection circuit detects that the inductor current decreases. As the load demand current continues to rise, the first transistor is turned off by shortening its turn-off time so that it enters the next conduction cycle as early as possible, thereby increasing the average current level flowing through the inductor and bringing it closer to the load demand current requirement.

[0127] The current detection circuit detects increases or decreases in the inductor current to determine the on or off state of the first transistor. It compares this value with the integral of the gate-source voltage of the first or second transistor by the first or second integrator circuit to determine if the average current flowing through the inductor meets the load's current requirements. A rectangular pulse is output via a window comparator to control the on or off state of the first and second transistors. Within the same conduction cycle, the first and second transistors alternately conduct; when the first transistor is on, the second transistor is off, and vice versa. This cycle continues. If the load experiences momentary load withdrawal or discharge, the current detection circuit can detect the signal, accelerating the response of the first transistor. The DC-DC conversion control circuit requires no compensation network, resulting in a simple circuit structure, shortened circuit design cycle, and avoids the need for additional magnetic components, thus preventing internal electromagnetic interference. Circuit integration effectively controls the circuit size.

[0128] For cases where the load current demand decreases, the adjustment method described above is similar. It is necessary to shorten the conduction time of the first transistor and extend the time to enter the next conduction cycle, which will not be elaborated here. Figure 6 The diagram shows a waveform of the inductor current being adjusted to meet the load current demand when the load demand current decreases.

[0129] Figure 6 Chinese V GS1 V GS2 These correspond to the gate drive voltages of the first and second transistors. It should be noted that: Figure 6 The high level indicates that the transistor is turned on, and the low level indicates that the transistor is turned off. However, the actual driving voltage needs to be applied depending on the type of transistor.

[0130] The first transistor T1 is a P-channel power MOSFET, and the second transistor T2 is an N-channel power MOSFET.

[0131] The DC-DC conversion circuit also includes: a third capacitor C3;

[0132] One end of the third capacitor C3 is electrically connected to the output terminal of the DC-DC converter circuit;

[0133] The other end of the third capacitor C3 is grounded.

[0134] In other embodiments, an electronic device includes the unidirectional DC-DC converter circuit described above.

[0135] In other embodiments, an electronic device includes the polynomial DC-DC converter circuit described above.

[0136] In a polynomial DC-DC converter circuit, the presence of multiple DC-DC conversion sub-circuits allows for handling larger load current demands. Combined with the DC-DC conversion control circuit disclosed in the embodiments of this application, the response speed to load current demands can be improved.

[0137] By implementing the embodiments disclosed in this invention, the current can be adjusted in the next switching cycle of the power transistor in response to changes in the load demand current, and the current adjustment response speed is fast; the circuit structure is simple and no additional magnetic components are required; through circuit integration, the circuit size can be effectively controlled.

[0138] All of the above-mentioned optional technical solutions can be combined in any way to form optional embodiments of the present invention, and will not be described in detail here.

[0139] Example 1

[0140] A DC-DC conversion control circuit is used to control the on / off state of the power switching transistors in the DC-DC conversion circuit to adjust the current required by the output load of the DC-DC conversion circuit. The power switching transistors include a first transistor T1 and a second transistor T2. For example... Figure 1 As shown, the DC-DC conversion control circuit includes:

[0141] First integrating circuit I1, first input terminal I of first integrating circuit I1 11 The gate of the first transistor T1 in the DC-DC converter circuit is electrically connected to the second input terminal I of the first integrator circuit I1. 12 Electrically connected to the source of the first transistor T1, the first integrator I1 output terminal I 1O The first window input terminal W of the window comparator WIN I1 Electrical connection;

[0142] The second integrating circuit I2, the first input terminal of the second integrating circuit I2 21 The gate of the second transistor T2 in the DC-DC converter circuit is electrically connected to the second input terminal I of the second integrator circuit I2. 22 Electrically connected to the source of the second transistor, the output terminal I of the second integrator circuit I2 is... 2O The second window input terminal W of the window comparator WIN I2 Electrical connection;

[0143] The current detection circuit DET, the first detection input terminal D of the current detection circuit DET I1 One end of the inductor L in the DC-DC converter circuit is electrically connected to the second detection input terminal D of the current detection circuit DET. I2 Electrically connected to the other end of inductor L, the detection output terminal D of the current detection circuit DETO The third window input terminal W of the window comparator WIN I3 Electrical connection, wherein one end of inductor L is electrically connected to the drain of the second transistor T2, and the other end of inductor L serves as the output terminal of the DC-DC conversion circuit;

[0144] The window comparator circuit WIN, and the window output terminal W of the window comparator circuit WIN. O The output pulse control signal enables the pulse drive module of the DC-DC converter circuit to control the power switching transistor of the DC-DC converter circuit to turn on or off according to the pulse control signal.

[0145] Example 2

[0146] Based on Example 1, such as Figure 2 As shown, the first integrating circuit I1 includes: a first operational amplifier OPA1, a first resistor R1, and a first capacitor C1;

[0147] The first input terminal of the first operational amplifier OPA1 is electrically connected to one end of the first resistor R1, and the other end of the first resistor R1 serves as the first input terminal I of the first integrator circuit. 11 ;

[0148] The first input terminal of the first operational amplifier is also electrically connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is electrically connected to the output terminal of the first operational amplifier OPA1. The output terminal of the first operational amplifier serves as the output terminal I of the first integrating circuit. 1O ;

[0149] The first operational amplifier OPA1's second input terminal serves as the second input terminal of the first integrating circuit. 12 .

[0150] The second integrating circuit I2 includes: a second operational amplifier OPA2, a second resistor R2, and a second capacitor C2;

[0151] The first input terminal of the second operational amplifier OPA2 is electrically connected to one end of the second resistor R2, and the other end of the second resistor R2 serves as the first input terminal I of the second integrator circuit. 21 ;

[0152] The first input terminal of the second operational amplifier is also electrically connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is electrically connected to the output terminal of the second operational amplifier OPA2. The output terminal of the second operational amplifier serves as the output terminal I of the second integrator circuit. 2O ;

[0153] The second input terminal of the second operational amplifier OPA2 serves as the second input terminal of the second integrator circuit. 22 .

[0154] The current detection circuit DET includes: a third operational amplifier OPA3;

[0155] The first input terminal of the third operational amplifier OPA3 is used as the first detection input terminal D. I1 It is electrically connected to one end of the inductor L;

[0156] The second input terminal of the third operational amplifier OPA3 is used as the second detection input terminal D. I2 It is electrically connected to the other end of the inductor L;

[0157] The output terminal of the third operational amplifier OPA3 is used as the detection output terminal D. O , and the third window input terminal W I3 Electrical connection.

[0158] The window comparator circuit WIN includes: the fourth operational amplifier OPA4 and the fifth operational amplifier OPA5;

[0159] The first input terminal of the fourth operational amplifier OPA4 is used as the first window input terminal W. I1 ;

[0160] The second input terminal of the fifth operational amplifier OPA5 is used as the second window input terminal W. I2 ;

[0161] The second input terminal of the fourth op-amp of the fourth operational amplifier OPA4 is electrically connected to the first input terminal of the fifth op-amp of the fifth operational amplifier OPA5, and then serves as the third window input terminal W. I3 ;

[0162] The output terminals of the fourth and fifth operational amplifiers are electrically connected to form the window output terminal W. O .

[0163] Example 3

[0164] A DC-DC converter circuit includes at least one DC-DC converter sub-circuit, the DC-DC converter sub-circuit including the DC-DC converter control circuit described in Embodiment 2.

[0165] like Figure 3 As shown, the input terminal of at least one DC-DC converter sub-circuit is electrically connected to the input terminal V of the DC-DC converter circuit. IN ;

[0166] The output of at least one DC-DC converter sub-circuit is electrically connected to the output V of the DC-DC converter circuit. OUT .

[0167] Example 4

[0168] A unidirectional DC-DC converter circuit includes a DC-DC converter sub-circuit, such as Figure 4 As shown, the DC-DC converter sub-circuit includes: a first transistor T1, a second transistor T2, an inductor L, a pulse drive module PWMD, and the DC-DC conversion control circuit described in Embodiment 2.

[0169] The first transistor T1 has its source as the input terminal of the DC-DC converter circuit. The drain of the first transistor T1 is electrically connected to the drain of the second transistor T2 and then electrically connected to one end of the inductor L.

[0170] The source of the second transistor T2 is grounded;

[0171] The other end of the inductor L serves as the output terminal of the DC-DC converter circuit;

[0172] The pulse drive module PWMD, the signal input terminal and window output terminal W of the pulse drive module PWMD. O Electrically connected, the first pulse output terminal of the pulse drive module PWMD is electrically connected to the gate of the first transistor T1, and the second pulse output terminal of the pulse drive module PWMD is electrically connected to the gate of the second transistor T2.

[0173] The DC-DC conversion control circuit includes: a first integrating circuit I1, and a first input terminal I of the first integrating circuit I1. 11 The gate of the first transistor T1 in the DC-DC converter circuit is electrically connected to the second input terminal I of the first integrator circuit I1. 12 Electrically connected to the source of the first transistor T1, the first integrator I1 output terminal I 1O The first window input terminal W of the window comparator WIN I1 Electrical connection;

[0174] The second integrating circuit I2, the first input terminal of the second integrating circuit I2 21 The gate of the second transistor T2 in the DC-DC converter circuit is electrically connected to the second input terminal I of the second integrator circuit I2. 22 Electrically connected to the source of the second transistor, the output terminal I of the second integrator circuit I2 is... 2O The second window input terminal W of the window comparator WIN I2 Electrical connection;

[0175] The current detection circuit DET, the first detection input terminal D of the current detection circuit DET I1 One end of the inductor L in the DC-DC converter circuit is electrically connected to the second detection input terminal D of the current detection circuit DET. I2 Electrically connected to the other end of inductor L, the detection output terminal D of the current detection circuit DETO The third window input terminal W of the window comparator WIN I3 Electrical connection, wherein one end of inductor L is electrically connected to the drain of the second transistor T2, and the other end of inductor L serves as the output terminal of the DC-DC conversion circuit;

[0176] The window comparator circuit WIN, and the window output terminal W of the window comparator circuit WIN. O The output pulse control signal enables the pulse drive module of the DC-DC converter circuit to control the power switching transistor of the DC-DC converter circuit to turn on or off according to the pulse control signal.

[0177] The first transistor T1 is a P-channel power MOSFET, and the second transistor T2 is an N-channel power MOSFET.

[0178] The DC-DC conversion circuit also includes: a third capacitor C3;

[0179] One end of the third capacitor C3 is electrically connected to the output terminal of the DC-DC converter circuit;

[0180] The other end of the third capacitor C3 is grounded.

[0181] Example 5

[0182] A polynomial DC-DC converter circuit includes two or more DC-DC converter sub-circuits, such as... Figure 3 As shown, the DC-DC converter sub-circuit includes: a first transistor T1, a second transistor T2, an inductor L, a pulse drive module PWMD, and the DC-DC conversion control circuit described in Embodiment 2.

[0183] The first transistor T1 has its source as the input terminal of the DC-DC converter circuit. The drain of the first transistor T1 is electrically connected to the drain of the second transistor T2 and then electrically connected to one end of the inductor L.

[0184] The source of the second transistor T2 is grounded;

[0185] The other end of the inductor L serves as the output terminal of the DC-DC converter circuit;

[0186] The pulse drive module PWMD, the signal input terminal and window output terminal W of the pulse drive module PWMD. O Electrically connected, the first pulse output terminal of the pulse drive module PWMD is electrically connected to the gate of the first transistor T1, and the second pulse output terminal of the pulse drive module PWMD is electrically connected to the gate of the second transistor T2.

[0187] The DC-DC conversion control circuit includes: a first integrating circuit I1, and a first input terminal I of the first integrating circuit I1. 11The gate of the first transistor T1 in the DC-DC converter circuit is electrically connected to the second input terminal I of the first integrator circuit I1. 12 Electrically connected to the source of the first transistor T1, the first integrator I1 output terminal I 1O The first window input terminal W of the window comparator WIN I1 Electrical connection;

[0188] The second integrating circuit I2, the first input terminal of the second integrating circuit I2 21 The gate of the second transistor T2 in the DC-DC converter circuit is electrically connected to the second input terminal I of the second integrator circuit I2. 22 Electrically connected to the source of the second transistor, the output terminal I of the second integrator circuit I2 is... 2O The second window input terminal W of the window comparator WIN I2 Electrical connection;

[0189] The current detection circuit DET, the first detection input terminal D of the current detection circuit DET I1 One end of the inductor L in the DC-DC converter circuit is electrically connected to the second detection input terminal D of the current detection circuit DET. I2 Electrically connected to the other end of inductor L, the detection output terminal D of the current detection circuit DET O The third window input terminal W of the window comparator WIN I3 Electrical connection, wherein one end of inductor L is electrically connected to the drain of the second transistor T2, and the other end of inductor L serves as the output terminal of the DC-DC conversion circuit;

[0190] The window comparator circuit WIN, and the window output terminal W of the window comparator circuit WIN. O The output pulse control signal enables the pulse drive module of the DC-DC converter circuit to control the power switching transistor of the DC-DC converter circuit to turn on or off according to the pulse control signal.

[0191] The first transistor T1 is a P-channel power MOSFET, and the second transistor T2 is an N-channel power MOSFET.

[0192] The DC-DC conversion circuit also includes: a third capacitor C3;

[0193] One end of the third capacitor C3 is electrically connected to the output terminal of the DC-DC converter circuit;

[0194] The other end of the third capacitor C3 is grounded.

[0195] Example 6

[0196] An electronic device includes the unidirectional DC-DC converter circuit described in Embodiment 4.

[0197] Example 7

[0198] An electronic device includes the polynomial DC-DC converter circuit described in Embodiment 5.

[0199] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program loaded on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from memory, or installed from ROM. When the computer program is executed by an external processor, it performs the functions defined in the methods of embodiments of this application.

[0200] It should be noted that the computer-readable medium in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In the embodiments of this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the embodiments of this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (Radio Frequency), etc., or any suitable combination thereof.

[0201] The aforementioned computer-readable medium may be included in the aforementioned server; or it may exist independently and not assembled into the server. The aforementioned computer-readable medium carries one or more programs that, when executed by the server, cause the server to: in response to detecting that the peripheral mode of the terminal is not activated, acquire the frame rate of the application on the terminal; when the frame rate meets the screen-off condition, determine whether the user is acquiring the terminal's screen information; and in response to the determination that the user is not acquiring the terminal's screen information, control the screen to enter an immediate dimming mode.

[0202] Computer program code for performing the operations of the embodiments of this application can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages—such as Java, Smalltalk, and C++—and conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0203] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0204] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

[0205] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A DC-DC conversion control circuit, characterized in that, The DC-DC conversion control circuit is used to control the power switching transistor of the DC-DC conversion circuit to turn on or off, so as to adjust the current required by the output load of the DC-DC conversion circuit. The power switching transistor includes a first transistor and a second transistor. The DC-DC conversion control circuit includes: The first integrating circuit has its first input terminal electrically connected to the gate of the first transistor of the DC-DC converter, its second input terminal electrically connected to the source of the first transistor, and its output terminal electrically connected to the first window input terminal of the window comparator. The second integrating circuit has its first input terminal electrically connected to the gate of the second transistor of the DC-DC converter, its second input terminal electrically connected to the source of the second transistor, and its output terminal electrically connected to the second window input terminal of the window comparator. A current detection circuit has a first detection input terminal electrically connected to one end of an inductor in a DC-DC converter circuit, a second detection input terminal electrically connected to the other end of the inductor, and a detection output terminal electrically connected to the third window input terminal of the window comparator. One end of the inductor is electrically connected to the drain of the first transistor and the drain of the second transistor, and the other end of the inductor serves as the output terminal of the DC-DC converter circuit. The window comparator circuit outputs a pulse control signal at its window output terminal. The pulse drive module of the DC-DC converter circuit controls the power switch of the DC-DC converter circuit to turn on or off according to the pulse control signal.

2. The DC-DC conversion control circuit according to claim 1, characterized in that, The first integrating circuit includes: a first operational amplifier, a first resistor, and a first capacitor; The first input terminal of the first operational amplifier is electrically connected to one end of the first resistor, and the other end of the first resistor serves as the first input terminal of the first integrating circuit. The first input terminal of the first operational amplifier is also electrically connected to one end of the first capacitor, and the other end of the first capacitor is electrically connected to the first output terminal of the first operational amplifier. The output terminal of the first operational amplifier serves as the output terminal of the first integrating circuit. The first operational amplifier's second input terminal serves as the second input terminal of the first integrator circuit.

3. The DC-DC conversion control circuit according to claim 1, characterized in that, The second integrating circuit includes: a second operational amplifier, a second resistor, and a second capacitor; The first input terminal of the second operational amplifier is electrically connected to one end of the second resistor, and the other end of the second resistor serves as the first input terminal of the second integrating circuit. The first input terminal of the second operational amplifier is also electrically connected to one end of the second capacitor, and the other end of the second capacitor is electrically connected to the output terminal of the second operational amplifier. The output terminal of the second operational amplifier serves as the output terminal of the second integrating circuit. The second input terminal of the second operational amplifier serves as the second input terminal of the second integrator circuit.

4. The DC-DC conversion control circuit according to claim 1, characterized in that, The current detection circuit includes: a third operational amplifier; The first input terminal of the third operational amplifier is used as the first detection input terminal and is electrically connected to one end of the inductor; The second input terminal of the third operational amplifier is used as the second detection input terminal and is electrically connected to the other end of the inductor; The third operational amplifier's third op-amp output terminal serves as the detection output terminal.

5. The DC-DC conversion control circuit according to claim 1, characterized in that, The window comparison circuit includes: a fourth operational amplifier and a fifth operational amplifier; The first input terminal of the fourth operational amplifier is used as the input terminal of the first window; The second input terminal of the fifth operational amplifier is used as the input terminal of the second window; The second input terminal of the fourth operational amplifier is electrically connected to the first input terminal of the fifth operational amplifier to serve as the input terminal of the third window. The output terminals of the fourth and fifth operational amplifiers are electrically connected to form the window output terminal; Wherein, the first input terminal of the fourth operational amplifier is the inverting input terminal of the fourth operational amplifier, the second input terminal of the fourth operational amplifier is the non-inverting input terminal of the fourth operational amplifier, the first input terminal of the fifth operational amplifier is the inverting input terminal of the fifth operational amplifier, and the second input terminal of the fifth operational amplifier is the non-inverting input terminal of the fifth operational amplifier.

6. A DC-DC converter circuit, characterized in that, The DC-DC conversion circuit includes at least one DC-DC conversion sub-circuit, and the DC-DC conversion sub-circuit includes the DC-DC conversion control circuit according to any one of claims 1 to 5; The input terminal of the at least one DC-DC converter sub-circuit is electrically connected to the input terminal of the DC-DC converter circuit; The output terminal of the at least one DC-DC converter sub-circuit is electrically connected to the output terminal of the DC-DC converter circuit.

7. A DC-DC converter circuit according to claim 6, characterized in that, The DC-DC converter sub-circuit includes: First transistor, second transistor, inductor, pulse drive module, DC-DC conversion control circuit; The source of the first transistor serves as the input terminal of the DC-DC conversion circuit, and its drain is electrically connected to the drain of the second transistor and then electrically connected to one end of the inductor. The source of the second transistor is grounded; The other end of the inductor serves as the output terminal of the DC-DC conversion circuit. The pulse driving module has its signal input terminal electrically connected to its window output terminal, its first pulse output terminal electrically connected to the gate of the first transistor, and its second pulse output terminal electrically connected to the gate of the second transistor. The DC-DC conversion control circuit includes: The first integrating circuit has its first input terminal electrically connected to the gate of the first transistor of the DC-DC converter, its second input terminal electrically connected to the source of the first transistor, and its output terminal electrically connected to the first window input terminal of the window comparator. The second integrating circuit has its first input terminal electrically connected to the gate of the second transistor of the DC-DC converter, its second input terminal electrically connected to the source of the second transistor, and its output terminal electrically connected to the second window input terminal of the window comparator. A current detection circuit has a first detection input terminal electrically connected to one end of an inductor in a DC-DC converter circuit, a second detection input terminal electrically connected to the other end of the inductor, and a detection output terminal electrically connected to the third window input terminal of the window comparator. One end of the inductor is electrically connected to the drain of the second transistor, and the other end of the inductor serves as the output terminal of the DC-DC converter circuit. The window comparator circuit outputs a pulse control signal at its window output terminal. The pulse drive module of the DC-DC converter circuit controls the power switch of the DC-DC converter circuit to turn on or off according to the pulse control signal.

8. The DC-DC conversion circuit according to claim 7, characterized in that, The first transistor is a P-channel power MOSFET, and the second transistor is an N-channel power MOSFET.

9. The DC-DC conversion circuit according to claim 6, characterized in that, The DC-DC conversion circuit also includes: a third capacitor; One end of the third capacitor is electrically connected to the output terminal of the DC-DC conversion circuit; The other end of the third capacitor is grounded.

10. An electronic device, characterized in that, The electronic device includes the DC-DC conversion circuit as described in any one of claims 6 to 9.

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