High peak current output circuit

Abstract

The utility model relates to a kind of high peak current output circuit, including control module, switch tube capacitance conversion circuit;Switch tube capacitance conversion circuit is connected between current input end and current output end;Control module is connected with current input end, to receive current feedback signal, and is connected with switch tube capacitance conversion circuit, in the case when the current feedback signal is lower than preset target current value, to pass through switch tube capacitance conversion circuit, adjust output current to reach target current value.This design makes full use of the high ripple current passing capacity of switch tube capacitance conversion circuit, can realize high peak current output in limited space, while avoiding magnetic device damage due to overload, improve the reliability and efficiency of system.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, and more specifically, to a high peak current output circuit. Background Technology

[0002] In high peak current output circuits, magnetic device conversion circuits are used to handle current conversion. However, when the average output current is relatively low, while the peak current output is very high, especially when it reaches several times the average output power, the magnetic device faces a significant risk of magnetic saturation. Magnetic saturation can lead to performance degradation or even damage to the magnetic device. To ensure that the magnetic device operates normally under high load conditions, it is usually necessary to increase its size to increase its magnetic flux handling capacity, thereby ensuring that the magnetic device operates in the unsaturated range. However, in practical applications, especially when space is limited, increasing the size of the magnetic device is often difficult to achieve. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a high peak current output circuit, which addresses the shortcomings of the above-mentioned magnetic devices in the prior art that are prone to magnetic saturation when outputting high peak current and are difficult to solve by increasing the size.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a high peak current output circuit, including a control module and a switching transistor capacitor conversion circuit 102;

[0005] The switching transistor capacitor conversion circuit 102 is connected between the current input terminal and the current output terminal; the control module is connected to the current input terminal to receive the current feedback signal, and is also connected to the switching transistor capacitor conversion circuit 102. When the current feedback signal is lower than the preset target current value, the control module adjusts the output current to reach the target current value through the switching transistor capacitor conversion circuit 102.

[0006] In one embodiment, a magnetic device conversion circuit 101 is also included in parallel with the switching transistor capacitor conversion circuit 102; the control module is connected to the magnetic device conversion circuit 101 when the current feedback signal is lower than a preset target current value;

[0007] The magnetic device conversion circuit 101 and the switching transistor capacitor conversion circuit 102 are used to make the output current reach the target current value;

[0008] Alternatively, the output current can be adjusted to achieve the target current value through the switching transistor capacitor conversion circuit 102.

[0009] In one embodiment, a current limiting circuit is further included, connected between the magnetic device conversion circuit and the current output terminal, for limiting the output current of the magnetic device conversion circuit; the control module is also electrically connected to the current limiting circuit.

[0010] In one embodiment, the magnetic device switching circuit is one of a full-bridge circuit, a half-bridge circuit, a push-pull circuit, a flyback circuit, a forward circuit, or a phase-shifting circuit; the switching transistor capacitor switching circuit is one of a ladder circuit, a Dickson circuit, a Fibonacci circuit, a series-parallel circuit, or a voltage multiplier circuit.

[0011] In one embodiment, the magnetic device switching circuit is a full-bridge circuit, including: a first switch SW1, a second switch SW2, a third switch SW3, a fourth switch SW4, a fifth switch SW5, a sixth switch SW6, a first capacitor C1, a second capacitor C2, and a transformer;

[0012] The current input terminal is connected to one end of the first switch SW1 and one end of the second switch SW2. The current input terminal is also connected to one end of the third switch SW3 and one end of the fourth switch SW4. The other end of the fourth switch is connected to the other end of the second switch SW2 and is also connected to the reference ground.

[0013] One end of the first capacitor C1 is connected to the common point of the first switch SW1 and the second switch SW2, and the other end is connected to the first input terminal of the transformer; the second input terminal of the transformer is connected to the common point of the third switch SW3 and the fourth switch SW4.

[0014] The first output terminal of the transformer is connected to the second output terminal of the transformer through the fifth switch SW5 and the sixth switch SW6. The current limiting circuit is connected to the common point of the fifth switch SW5 and the sixth switch SW6. One end of the second capacitor C2 is connected to the common point of the fifth switch SW5 and the sixth switch SW6, and the other end is grounded. The third output terminal of the transformer is connected to the common point of the second capacitor C2 and the reference ground.

[0015] The control module is connected to the control terminals of the first switch SW1, the second switch SW2, the third switch SW3, the fourth switch SW4, the fifth switch SW5, and the sixth switch SW6, respectively, and is used to control the on / off state of each switch.

[0016] In one embodiment, the current limiting circuit includes a seventh switch SW7 and a first resistor;

[0017] One end of the seventh switch SW7 is connected to the common point of the fifth switch SW5 and the sixth switch SW6 through the first end of the second capacitor C2, and the other end is connected to one end of the first resistor, and the other end of the first resistor is connected to the current output terminal.

[0018] In one embodiment, the switching transistor capacitor conversion circuit is a series-parallel circuit, including: an eighth switching transistor SW8, a ninth switching transistor SW9, a tenth switching transistor SW10, an eleventh switching transistor SW11, a third capacitor C3, and a fourth capacitor C4;

[0019] The current input terminal is connected to the current output terminal through the eighth switch SW8 and the ninth switch SW9. The common point of the ninth switch SW9 and the current output terminal is grounded through the tenth switch SW10 and the eleventh switch SW11 in sequence. The first end of the third capacitor C3 is connected to the common point of the eighth switch SW8 and the ninth switch SW9, and the other end is connected to the common point of the tenth switch SW10 and the eleventh switch SW11. One end of the fourth capacitor C4 is connected to the common point of the ninth switch SW9 and the tenth switch SW10, and the other end is connected to the common point of the eleventh switch SW11 and the reference ground.

[0020] The control circuit is connected to the control terminals of the eighth, ninth, tenth, and eleventh switching transistors, respectively, and is used to control the on / off state of each switching transistor.

[0021] In one embodiment, the magnetic device conversion circuit 101 handles the average power, and the switching transistor capacitor conversion circuit 102 handles the peak current; the magnetic device conversion circuit performs the following in each control cycle:

[0022] In the first stage, the control module controls the first switch SW1, the fourth switch SW4, the fifth switch SW5 and the seventh switch SW7 to be turned on; and controls the second switch SW2, the third switch SW3 and the sixth switch SW6 to be turned off.

[0023] In the second stage, the control module controls the second switch SW2, the third switch SW3, the sixth switch SW6 and the seventh switch SW7 to be turned on; and controls the first switch SW1, the fourth switch SW4 and the fifth switch SW5 to be turned off.

[0024] The switching transistor capacitor conversion circuit executes in each control cycle:

[0025] In the first stage, the control module controls the eighth switch SW8 and the tenth switch SW10 to be turned on, and controls the ninth switch SW9 and the eleventh switch SW11 to be turned off.

[0026] In the second stage, the control module controls the ninth switch SW9 and the eleventh switch (SW11) to be turned on, and controls the eighth switch SW8 and the tenth switch SW10 to be turned off.

[0027] In one embodiment, adjusting the output current to reach the target current value via the switching transistor capacitor conversion circuit 102 includes controlling the first switching transistor SW1, the second switching transistor SW2, the third switching transistor SW3, the fourth switching transistor SW4, the fifth switching transistor SW5, the sixth switching transistor SW6, and the seventh switching transistor SW7 to turn off. The switching transistor capacitor conversion circuit 102 provides a peak current and performs output in each control cycle.

[0028] In the first stage, the control module controls the eighth switch SW8 and the tenth switch SW10 to be turned on, and controls the ninth switch SW9 and the eleventh switch SW11 to be turned off.

[0029] In the second stage, the control module controls the ninth switch SW9 and the eleventh switch SW11 to be turned on, and controls the eighth switch SW8 and the tenth switch SW10 to be turned off.

[0030] In one embodiment, the switching transistor is any one of a silicon-based MOSFET device, a silicon carbide device, or a gallium nitride device.

[0031] The beneficial effects of this invention are as follows: This invention provides a high peak current output circuit including a control module and a switching transistor-capacitor conversion circuit 102. The switching transistor-capacitor conversion circuit 102 is connected between the current input terminal and the current output terminal. The control module is connected to the current input terminal to receive a current feedback signal and is also connected to the switching transistor-capacitor conversion circuit 102. When the current feedback signal is lower than a preset target current value, the switching transistor-capacitor conversion circuit 102 adjusts the output current to reach the target current value. This design fully utilizes the high ripple current carrying capacity of the switching transistor-capacitor conversion circuit, enabling high peak current output within a limited space while avoiding damage to magnetic components due to overload, thus improving the reliability and efficiency of the system. Attached Figure Description

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0033] Figure 1This is a logic diagram of an embodiment of the high peak current output circuit of this utility model;

[0034] Figure 2 This is a circuit diagram of one embodiment of the high peak current output circuit of this utility model;

[0035] Figure 3 This is a circuit diagram of another embodiment of the high peak current output circuit of this utility model. Detailed Implementation

[0036] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0037] like Figure 1 As shown, Figure 1 This is a logic diagram of an embodiment of the high peak current output circuit of this utility model.

[0038] The technical solution adopted by this utility model to solve its technical problem is a high peak current output circuit, including a control module and a switching transistor capacitor conversion circuit 102;

[0039] The switching transistor capacitor conversion circuit 102 is connected between the current input terminal and the current output terminal; the control module is connected to the current input terminal to receive the current feedback signal and is connected to the switching transistor capacitor conversion circuit 102. When the current feedback signal is lower than the preset target current value, the output current is adjusted to reach the target current value through the switching transistor capacitor conversion circuit 102.

[0040] It should be noted that under independent current mode control, the control module will generate a corresponding control signal based on the deviation between the current feedback signal and the target current value, and precisely adjust parameters such as the turn-on and turn-off time and duty cycle of the switching transistor, thereby changing the working state of the switching transistor capacitor conversion circuit 102, so that the output current gradually approaches the target current value and eventually reaches the target current value, thus meeting the power demand of the load in high peak current scenarios.

[0041] like Figure 2As shown, the high peak current output circuit further includes a magnetic device conversion circuit 101 connected in parallel with the switching transistor capacitor conversion circuit 102; the control module magnetic device conversion circuit 101 is connected so that when the current feedback signal is lower than the preset target current value, the output current reaches the target current value through the magnetic device conversion circuit 101 and the switching transistor capacitor conversion circuit 102; or, the output current is adjusted to reach the target current value through the switching transistor capacitor conversion circuit 102.

[0042] Alternatively, the magnetic device conversion circuit 101 and the switching transistor capacitor conversion circuit 102 can flexibly distribute the target current in a fixed ratio mode under different application scenarios. When the load current is stable, the magnetic device conversion circuit bears 60%-70%, and the switching transistor capacitor conversion circuit bears 30%-40%; under peak load conditions, they bear 20%-30% and 70%-80% respectively. This distribution method can give full play to the advantages of both and ensure that the circuit operates efficiently and stably under various operating conditions.

[0043] This invention connects a switching transistor-capacitor conversion circuit 102 in parallel with a magnetic device conversion circuit 101. Utilizing the latter's high ripple current carrying capacity to handle peak current, the magnetic device conversion circuit 101 only needs to handle average current, reducing the risk of magnetic saturation and preventing performance degradation or damage. The switching transistor-capacitor conversion circuit 102 can provide a peak current far exceeding the average current for a short time, meeting application requirements. The two circuits work together to ensure stable average current output and rapid response to peak current demands, improving current output capability and adapting to different load conditions. The control module monitors the current feedback signal in real time, precisely controlling the two conversion circuits. Closed-loop control stabilizes the output current within the target range, reducing instability caused by current fluctuations and improving system stability. Because there is no need to increase the size of the magnetic device to prevent magnetic saturation, space is saved, facilitating flexible circuit design and layout in limited spaces, improving space utilization, and making it suitable for scenarios with strict space requirements. Furthermore, in average current mode, the magnetic device conversion circuit 101 handles the average current, while the switching transistor capacitor conversion circuit 102 operates in a low-loss or standby state, reducing energy loss. In peak current mode, the switching transistor capacitor conversion circuit 102 provides a rapid peak current, preventing inefficient operation of the magnetic device under high load. By rationally allocating workloads, the overall circuit efficiency is improved, energy consumption is reduced, and equipment lifespan is extended.

[0044] In one embodiment, the operating modes include a current-sharing mode and an independent current mode: In the current-sharing mode, the control module controls the magnetic device conversion circuit 101 and the switching transistor capacitor conversion circuit 102 to work together, and the output current is increased to the target current value by parallel output superposition current; In the independent current mode, the control module controls the magnetic device conversion circuit 101 to stop running and controls the switching transistor capacitor conversion circuit 102 to run, so that the output current is increased to the target current value.

[0045] It should be noted that this high peak current output circuit has both a current-sharing mode and an independent current mode. In the current-sharing mode, the control module operates the magnetic device conversion circuit 101 and the switching transistor-capacitor conversion circuit 102 in tandem, with the currents superimposed during parallel output, causing the output current to climb to the target value. At this time, the magnetic device conversion circuit 101 mainly handles the average current, while the switching transistor-capacitor conversion circuit 102, with its high ripple current carrying capacity, undertakes the peak current task. The two work together to ensure the stability and continuity of the output current. In the independent current mode, the control module instructs the magnetic device conversion circuit 101 not to operate, and only the switching transistor-capacitor conversion circuit 102 operates, independently supplying the output current. In this mode, the switching transistor-capacitor conversion circuit 102, relying on the characteristics of the switching transistor and capacitor, can supply high peak current for a short time to meet the instantaneous high current demand of the load.

[0046] like Figure 3 As shown, in one embodiment, a current limiting circuit 103 is also included, connected between the magnetic device conversion circuit 101 and the current output terminal, for limiting the output current of the magnetic device conversion circuit 101; the control module is also electrically connected to the current limiting circuit 103, and in the current sharing mode, limits the output current of the magnetic device conversion circuit 101 so that the magnetic device conversion circuit 101 and the switching transistor capacitor conversion circuit 102 maintain a preset output current ratio.

[0047] It should be noted that the current limiting circuit 103 is connected between the magnetic device conversion circuit 101 and the current output terminal to limit the output current of the magnetic device conversion circuit 101. Its function is to ensure that the output current of the magnetic device conversion circuit 101 does not exceed a preset threshold, preventing performance degradation or damage due to overload. The current limiting circuit can be implemented in various ways, such as current limiting circuits based on resistors, inductors, or semiconductor devices; these methods can effectively control the current magnitude.

[0048] Alternatively, in the current-sharing mode, the introduction of the current-limiting circuit 103 further optimizes the cooperative operation of the magnetic device conversion circuit 101 and the switching transistor-capacitor conversion circuit 102. The current-limiting circuit 103 effectively prevents excessive output current from the magnetic device conversion circuit 101, ensuring it always operates within a safe and efficient range. Simultaneously, the switching transistor-capacitor conversion circuit 102 can respond more flexibly to load changes when handling peak current, eliminating concerns about overload of the magnetic device conversion circuit 101. This optimized current-sharing mode not only improves the stability and reliability of the current output but also extends the service life of the magnetic device conversion circuit 101 and reduces maintenance costs.

[0049] In one embodiment, the magnetic device switching circuit is one of a full-bridge circuit, a half-bridge circuit, a push-pull circuit, a flyback circuit, a forward circuit, or a phase-shifting circuit, and the switching transistor capacitor switching circuit is one of a ladder circuit, a Dickson circuit, a Fibonacci circuit, a series-parallel circuit, or a voltage multiplier circuit.

[0050] It should be noted that the magnetic device conversion circuit can be one of the following: full-bridge circuit, half-bridge circuit, push-pull circuit, flyback circuit, forward circuit, or phase-shifting circuit. Taking the full-bridge circuit as an example, it consists of four switching transistors and can efficiently convert the input voltage into a high-frequency AC voltage, suitable for high-power applications. The switching transistor capacitor conversion circuit can be one of the following: ladder circuit, Dickson circuit, Fibonacci circuit, series-parallel circuit, or voltage multiplier circuit. Taking the Dickson circuit as an example, it is a classic switched-capacitor circuit that, through the cascading of multiple switching transistors and capacitors, can output a higher DC voltage when the input voltage is low.

[0051] like Figure 2As shown, in one embodiment, the magnetic device conversion circuit is a full-bridge circuit, including: a first switch SW1, a second switch SW2, a third switch SW3, a fourth switch SW4, a fifth switch SW5, a sixth switch SW6, a first capacitor C1, a second capacitor C2, and a transformer; the current input terminal is connected to one end of the first switch SW1 and one end of the second switch SW2, and the current input terminal is also connected to one end of the third switch SW3 and one end of the fourth switch SW4, the other end of the fourth switch SW4 is connected to the other end of the second switch SW2, and is also connected to a reference ground; one end of the first capacitor C1 is connected to the common point of the first switch SW1 and the second switch SW2, and its other end is connected to the first input terminal of the transformer; the second capacitor of the transformer... The input terminal is connected to the common point of the third switch SW3 and the fourth switch SW4; the first output terminal of the transformer is connected to the second output terminal of the transformer through the fifth switch SW5 and the sixth switch SW6; the current limiting circuit 103 is connected to the common point of the fifth switch SW5 and the sixth switch SW6; one end of the second capacitor C2 is connected to the common point of the fifth switch SW5 and the sixth switch SW6, and the other end is grounded; the third output terminal of the transformer is connected to the common point of the second capacitor C2 and the reference ground; the control module is connected to the control terminals of the first switch SW1, the second switch SW2, the third switch SW3, the fourth switch SW4, the fifth switch SW5, and the sixth switch SW6 respectively, and is used to control the on and off of each switch.

[0052] In one embodiment, the current limiting circuit includes a seventh switch SW7 and a first resistor; one end of the seventh switch SW7 is connected to the common point of the fifth switch SW5 and the sixth switch SW6 through the first end of the second capacitor C2, and the other end of the seventh switch SW7 is connected to one end of the first resistor, and the other end of the first resistor is connected to the current output terminal. In one embodiment, the switching transistor capacitor conversion circuit is a series-parallel circuit, including: an eighth switch SW8, a ninth switch SW9, a tenth switch SW10, an eleventh switch SW11, a third capacitor C3, and a fourth capacitor C4; the current input terminal is connected to the current output terminal through the eighth switch SW8 and the ninth switch SW9, and the common point of the ninth switch SW9 and the current output terminal is grounded sequentially through the tenth switch SW10 and the eleventh switch SW11; the first end of the third capacitor C3 is connected to the common point of the eighth switch SW8 and the ninth switch SW9, and the other end is connected to the common point of the tenth switch SW10 and the eleventh switch SW11; one end of the fourth capacitor C4 is connected to the common point of the ninth switch SW9 and the tenth switch SW10, and the other end is connected to the common point of the eleventh switch SW11 and the reference ground;

[0053] The control circuit is connected to the control terminals of the eighth, ninth, tenth, and eleventh switching transistors respectively, and is used to control the on / off state of each switching transistor.

[0054] In one embodiment, in the current-sharing mode, the magnetic device conversion circuit 101 bears the average power, and the switching transistor capacitor conversion circuit 102 bears the peak current. The magnetic device conversion circuit 101 performs the following in each control cycle: In the first stage, the control module controls the first switch SW1, the fourth switch SW4, the fifth switch SW5, and the seventh switch SW7 to be turned on; and controls the second switch SW2, the third switch SW3, and the sixth switch SW6 to be turned off. In the second stage, the control module controls the second switch SW2, the third switch SW3, the sixth switch SW6, and the seventh switch SW7 to be turned on; and controls the first switch SW1, the fourth switch SW4, and the fifth switch SW5 to be turned off.

[0055] The switching transistor capacitor conversion circuit executes in each control cycle: In the first stage, the control module controls the eighth switch SW8 and the tenth switch SW10 to turn on, and controls the ninth switch SW9 and the eleventh switch SW11 to turn off; in the second stage, the control module controls the ninth switch SW9 and the eleventh switch (SW11) to turn on, and controls the eighth switch SW8 and the tenth switch SW10 to turn off. Alternatively, the magnetic device conversion circuit 101 and the switching transistor capacitor conversion circuit 102 can also operate in other states in the current-sharing mode.

[0056] In one embodiment, in independent current mode, the first switch SW1, the second switch SW2, the third switch SW3, the fourth switch SW4, the fifth switch SW5, the sixth switch SW6, and the seventh switch SW7 are turned off. The switch capacitor conversion circuit 102 provides peak current. The switch capacitor conversion circuit 102 performs the following in each control cycle: In the first stage, the control module controls the eighth switch SW8 and the tenth switch SW10 to turn on, and controls the ninth switch SW9 and the eleventh switch SW11 to turn off; In the second stage, the control module controls the ninth switch SW9 and the eleventh switch SW11 to turn on, and controls the eighth switch SW8 and the tenth switch SW10 to turn off.

[0057] In one embodiment, this invention utilizes an MCU controller to detect input and output conditions, and adjusts the output voltage of the magnetic converter in real time to achieve parallel connection and current distribution with the switched-capacitor converter, ensuring that the switched-capacitor converter bears the peak current. In the bidirectional conversion stage, the operating direction and current distribution of the magnetic converter need to be controlled so that the switched-capacitor converter can play its role in handling the peak current. If the magnetic converter is in a fixed-ratio mode and cannot actively adjust its output voltage, the magnetic converter and the switched-capacitor converter can be directly connected in parallel. In this case, under high peak output current conditions, the magnetic converter enters overload protection mode, and all output peak current is borne by the switched-capacitor converter. The switched-capacitor converter utilizes the characteristic that the peak current of the switching transistor (such as a silicon MOSFET, silicon carbide device, or gallium nitride device) is much greater than the average current, and the high ripple current carrying capacity of the capacitor (such as a ceramic capacitor), to provide instantaneous high peak current. In average current mode, both share the current. Furthermore, the output current of the magnetic converter can be limited by a current limiter, and combined with the fixed-ratio method of the switched-capacitor circuit, the current ratio between the two can be adjusted so that the switched-capacitor converter bears the peak current. In the bidirectional conversion stage, the operating direction of the magnetic converter needs to be controlled, and a bidirectional current limiter needs to be configured to achieve current distribution and allow the switched-capacitor converter to bear the peak current. Furthermore, a switched-capacitor approach can be used to adapt to the input / output voltage range and directly in high-peak-current circuits. In this case, all output peak current is borne by the switched-capacitor converter, which utilizes the characteristics of the switching transistor and capacitor to provide instantaneous high peak current, and the switched-capacitor converter can directly operate in bidirectional mode. Alternatively, the above functions can be achieved using a regulated DC-DC converter and a supercapacitor / battery as a buffer energy storage device. The advantages of this invention are: firstly, the high peak-current characteristics of the switched-capacitor converter are suitable for high-peak-current scenarios; secondly, within a limited volume, combining the characteristics of the switched-capacitor converter and the magnetic converter, a higher average current and a very high peak-current output are achieved.

[0058] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, free combinations of the above technical features and various modifications and improvements can be made without departing from the concept of the present utility model, and these all fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A high peak current output circuit, characterized by, Includes a control module and a switching transistor capacitor conversion circuit (102); The switching transistor capacitor conversion circuit (102) is connected between the current input terminal and the current output terminal; the control module is connected to the current input terminal to receive the current feedback signal and is connected to the switching transistor capacitor conversion circuit (102). When the current feedback signal is lower than the preset target current value, the control module adjusts the output current to reach the target current value through the switching transistor capacitor conversion circuit (102).

2. The high peak current output circuit according to claim 1, characterized in that, It also includes a magnetic device conversion circuit (101) connected in parallel with the switching transistor capacitor conversion circuit (102). The control module is connected to the magnetic device conversion circuit (101) and operates when the current feedback signal is lower than the preset target current value; The magnetic device conversion circuit (101) and the switching transistor capacitor conversion circuit (102) are used to make the output current reach the target current value; Alternatively, the output current can be adjusted to achieve the target current value through the switching transistor capacitor conversion circuit (102).

3. The high peak current output circuit according to claim 2, characterized in that, It also includes a current limiting circuit (103) connected between the magnetic device conversion circuit (101) and the output terminal of the current, for limiting the output current of the magnetic device conversion circuit (101). The control module is also electrically connected to the current limiting circuit (103).

4. The high peak current output circuit according to claim 2, characterized in that, The magnetic device conversion circuit (101) is one of the following: full-bridge circuit, half-bridge circuit, push-pull circuit, flyback circuit, forward circuit, and phase-shifting circuit; The switching transistor capacitor conversion circuit (102) is one of the following: ladder circuit, Dickson circuit, Fibonacci circuit, series-parallel circuit, and voltage multiplier circuit.

5. The high peak current output circuit according to claim 4, characterized in that, The magnetic device conversion circuit is a full-bridge circuit, including: a first switch (SW1), a second switch (SW2), a third switch (SW3), a fourth switch (SW4), a fifth switch (SW5), a sixth switch (SW6), a first capacitor (C1), a second capacitor (C2), and a transformer; The current input terminal is connected to one end of the first switch (SW1) and one end of the second switch (SW2). The current input terminal is also connected to one end of the third switch (SW3) and one end of the fourth switch (SW4). The other end of the fourth switch is connected to the other end of the second switch (SW2) and is also connected to the reference ground. One end of the first capacitor (C1) is connected to the common point of the first switch (SW1) and the second switch (SW2), and the other end is connected to the first input terminal of the transformer; the second input terminal of the transformer is connected to the common point of the third switch (SW3) and the fourth switch (SW4); The first output terminal of the transformer is connected to the second output terminal of the transformer through the fifth switch (SW5) and the sixth switch (SW6). The current limiting circuit (103) is connected to the common point of the fifth switch (SW5) and the sixth switch (SW6). One end of the second capacitor (C2) is connected to the common point of the fifth switch (SW5) and the sixth switch (SW6), and the other end is grounded. The third output terminal of the transformer is connected to the common point of the second capacitor (C2) and the reference ground. The control module is connected to the control terminals of the first switch (SW1), the second switch (SW2), the third switch (SW3), the fourth switch (SW4), the fifth switch (SW5), and the sixth switch (SW6) respectively, and is used to control the on / off state of each switch.

6. The high peak current output circuit according to claim 5, characterized in that, The current limiting circuit includes a seventh switch (SW7) and a first resistor; One end of the seventh switch (SW7) is connected to the common point of the fifth switch (SW5) and the sixth switch (SW6) through the first end of the second capacitor (C2), and the other end of the seventh switch (SW7) is connected to one end of the first resistor, and the other end of the first resistor is connected to the current output terminal.

7. The high peak current output circuit according to claim 6, characterized in that, The switching transistor capacitor conversion circuit is a series-parallel circuit, including: the eighth switching transistor (SW8), the ninth switching transistor (SW9), the tenth switching transistor (SW10), the eleventh switching transistor (SW11), the third capacitor (C3), and the fourth capacitor (C4). The current input terminal is connected to the current output terminal through the eighth switch (SW8) and the ninth switch (SW9). The common point of the ninth switch (SW9) and the current output terminal is grounded through the tenth switch (SW10) and the eleventh switch (SW11) in sequence. The first end of the third capacitor (C3) is connected to the common point of the eighth switch (SW8) and the ninth switch (SW9), and the other end is connected to the common point of the tenth switch (SW10) and the eleventh switch (SW11). One end of the fourth capacitor (C4) is connected to the common point of the ninth switch (SW9) and the tenth switch (SW10), and the other end is connected to the common point of the eleventh switch (SW11) and the reference ground. The control module is connected to the control terminals of the eighth switch (SW8), the ninth switch (SW9), the tenth switch (SW10), and the eleventh switch (SW11) respectively, and is used to control the on / off state of each switch.

8. The high peak current output circuit according to claim 7, characterized in that, The magnetic device conversion circuit (101) handles the average power, and the switching transistor capacitor conversion circuit (102) handles the peak current. The magnetic device conversion circuit (101) executes in each control cycle: In the first stage, the control module controls the first switch (SW1), the fourth switch (SW4), the fifth switch (SW5), and the seventh switch (SW7) to be turned on; and controls the second switch (SW2), the third switch (SW3), and the sixth switch (SW6) to be turned off. In the second stage, the control module controls the second switch (SW2), the third switch (SW3), the sixth switch (SW6), and the seventh switch (SW7) to be turned on; and controls the first switch (SW1), the fourth switch (SW4), and the fifth switch (SW5) to be turned off. The switching transistor capacitor conversion circuit executes in each control cycle: In the first stage, the control module controls the eighth switch (SW8) and the tenth switch (SW10) to be turned on, and controls the ninth switch (SW9) and the eleventh switch (SW11) to be turned off. In the second stage, the control module controls the ninth switch (SW9) and the eleventh switch (SW11) to be turned on, and controls the eighth switch (SW8) and the tenth switch (SW10) to be turned off.

9. The high peak current output circuit according to claim 8, characterized in that, include: The process of adjusting the output current to achieve the target current value through the switching transistor capacitor conversion circuit (102) includes: controlling the first switching transistor (SW1), the second switching transistor (SW2), the third switching transistor (SW3), the fourth switching transistor (SW4), the fifth switching transistor (SW5), the sixth switching transistor (SW6), and the seventh switching transistor (SW7) to turn off, and the switching transistor capacitor conversion circuit (102) provides peak current and performs output in each control cycle.

10. The high peak current output circuit according to claim 9, characterized in that, The switching transistor is any one of a silicon-based MOSFET device, a silicon carbide device, or a gallium nitride device.

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