Boost type high-power DC-DC converter circuit

Abstract

The boost type high-power DC-DC converter circuit comprises an input filter circuit, and the rear end of the input filter circuit is sequentially connected with a full-bridge conversion circuit, a quasi-resonance circuit and a rectification filter circuit; a quasi-resonant soft-switching full-bridge circuit is adopted, and a switch is switched when the passing current is 0, so that the loss caused by switching of the switch is reduced, the switching frequency is improved to 70KHz, the loss of a switching tube is reduced, the power is improved in a limited space, the efficiency is improved, and the cost is reduced. In each driving period, the switch tube works in a zero-current (ZCS) turn-on and turn-off mode, so that the heating value of the switch tube is reduced, and meanwhile, the heat dissipation burden is reduced during high-power design.

Description

Technical Field

[0001] The present invention relates to a DC-DC converter which is a comprehensive technology of multiple disciplines such as electronic power, control theory and power electronic devices, and in particular to a boost type high-power DC-DC converter circuit. Background Art

[0002] Uninterruptible power supply systems are widely used in the fields of communications, electricity, finance, etc. They are mainly composed of UPS, battery pack boxes and distribution boxes. The UPS host needs to complete the voltage stabilization and conversion of the mains and the inverter function of the battery pack to output pure and reliable high-power AC power. The battery pack has a low supply voltage, which cannot be directly used by the subsequent inverter unit or load. It needs to be boosted to a certain voltage level through a DC-DC converter to meet the power demand of the subsequent unit, provide a stable and uninterrupted power supply, and protect the load equipment from voltage fluctuations and power pollution. In the event of a power outage, it can also provide a certain amount of emergency time so that users can save data and safely shut down the equipment.

[0003] In the prior art, due to the loss limitation caused by the switching process of the switch tube, the switching frequency of the traditional boost DC-DC converter is generally between 30KHz and 40KHz, and timely heat dissipation is required. Therefore, the size of the selected power device is relatively large, and it is difficult for the converter to achieve high efficiency and power improvement within a limited volume. When running at high power for a long time, overheating may occur, which will affect the performance and reliability of the converter.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a boost type high power DC-DC converter circuit to solve the above problems existing in the prior art, reduce the loss caused by switch switching, increase the converter power in a limited space, improve efficiency and reliability, and reduce costs.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] The boost-type high-power DC-DC converter circuit of the present invention comprises an input filter circuit, the rear end of which is sequentially connected to a full-bridge conversion circuit, a quasi-resonant circuit and a rectifier filter circuit;

[0008] The input filter circuit includes an input voltage source Vin and input filter capacitors C1 to C4. The positive electrode of the input voltage source Vin is respectively connected to the positive electrodes of the input filter capacitors C1, C2, C3, and C4. The negative electrode of the input voltage source Vin is respectively connected to the negative electrodes of the input filter capacitors C1, C2, C3, and C4. The negative electrode of the input voltage source Vin is also grounded.

[0009] The full-bridge conversion circuit includes switch tubes M1 to M16, transformers T1 to T4, a push-pull quasi-resonant controller U0, and gate drivers US1 to US8. The drains of the switch tubes M1 and M3 are connected to the positive electrode of the input filter capacitor C1, the drains of the switch tubes M5 and M7 are connected to the positive electrode of the input filter capacitor C2, the drains of the switch tubes M9 and M15 are connected to the positive electrode of the input filter capacitor C3, and the drains of the switch tubes M13 and M15 are connected to the positive electrode of the input filter capacitor C4; the drain of the switch tube M2 is respectively connected to the source of the switch tube M1 and the 1st pin of the transformer T1, the drain of the switch tube M4 is respectively connected to the source of the switch tube M3 and the 2nd pin of the transformer T1; the drain of the switch tube M6 is respectively connected to the source of the switch tube M5 and the 1st pin of the transformer T2 , the drain of the switch tube M8 is connected to the source of the switch tube M7 and the pin 2 of the transformer T2; the drain of the switch tube M10 is connected to the source of the switch tube M9 and the pin 1 of the transformer T3, the drain of the switch tube M12 is connected to the source of the switch tube M11 and the pin 2 of the transformer T3; the drain of the switch tube M14 is connected to the source of the switch tube M13 and the pin 1 of the transformer T4, the drain of the switch tube M16 is connected to the source of the switch tube M15 and the pin 2 of the transformer T4; the sources of the switch tubes M2, M4, M6, M8, M10, M12, M14 and M16 are all grounded.

[0010] Pin 4 of transformer T1 is connected to pin 3 of transformer T2, pin 4 of transformer T2 is connected to pin 3 of transformer T3, and pin 4 of transformer T3 is connected to pin 3 of transformer T4.

[0011] The PWMH output end of the push-pull quasi-resonant controller U0 is respectively connected to the HIN end of the gate driver US1, the LIN end of the gate driver US2, the HIN end of the gate driver US3, the LIN end of the gate driver US4, the HIN end of the gate driver US5, the LIN end of the gate driver US6, the HIN end of the gate driver US7, and the LIN end of the gate driver US8, and the PWML output end of the push-pull quasi-resonant controller U0 is respectively connected to the LIN end of the gate driver US1, the HIN end of the gate driver US2, the LIN end of the gate driver US3, the HIN end of the gate driver US4, the LIN end of the gate driver US5, the HIN end of the gate driver US6, the LIN end of the gate driver US7, and the HIN end of the gate driver US8.

[0012] The HO terminal of the gate driver US1 is connected to the gate of the switch tube M1, and the LO terminal is connected to the gate of the switch tube M2. The HO terminal of the gate driver US2 is connected to the gate of the switch tube M3, and the LO terminal is connected to the gate of the switch tube M4. The HO terminal of the gate driver US3 is connected to the gate of the switch tube M5, and the LO terminal is connected to the gate of the switch tube M6. The HO terminal of the gate driver US4 is connected to the gate of the switch tube M7, and the LO terminal is connected to the gate of the switch tube M8. The HO terminal of the gate driver US5 is connected to the gate of the switch tube M9, and the LO terminal is connected to the gate of the switch tube M10. The HO terminal of the gate driver US6 is connected to the gate of the switch tube M11, and the LO terminal is connected to the gate of the switch tube M12. The HO terminal of the gate driver US7 is connected to the gate of the switch tube M13, and the LO terminal is connected to the gate of the switch tube M14. The HO terminal of the gate driver US8 is connected to the gate of the switch tube M15, and the LO terminal is connected to the gate of the switch tube M16.

[0013] The quasi-resonant circuit includes a resonant inductor L0 and a resonant capacitor C0. The resonant inductor L0 and the resonant capacitor C0 are connected in series, and a pin 1 of the resonant inductor is connected to a pin 3 of the transformer T1.

[0014] The rectifier filter circuit includes diodes D1 to D4 and an output filter capacitor C6. The cathode of the diode D1 is connected to the cathode of the diode D3 and the positive electrode of the output filter capacitor C6 respectively, and the anode of the diode D2 is connected to the anode of the diode D4 and the negative electrode of the output filter capacitor C6 respectively; the anode of the diode D1 is connected to the cathode of the diode D2 and the 2nd pin of the resonant capacitor C0 respectively, and the anode of the diode D3 is connected to the cathode of the diode D4 and the 4th pin of the transformer T4 respectively.

[0015] Compared with the prior art, the boost-type high-power DC-DC converter circuit provided by the present invention adopts a quasi-resonant soft-switching full-bridge circuit. The switch is switched when the current passing through is 0, thereby reducing the loss caused by switching. The switching frequency can be as high as 70KHz, and the switch tube loss is small. The power is increased in a limited space, the efficiency is improved, and the cost is reduced. In each driving cycle, the switch tube operates in a zero current (ZCS) start-up and shutdown mode, thereby reducing the heat generation of the switch tube. At the same time, it also reduces the heat dissipation burden in high-power design, solves the technical difficulties, and achieves the purpose of improving efficiency, reliability, and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The circuit diagram of the boost type high power DC-DC converter of the present invention;

[0017] Figure 2 for Figure 1 Block diagram of gate drive principle of full-bridge conversion circuit. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0019] First, the terms that may be used in this article are explained as follows:

[0020] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0021] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0022] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0023] The contents not described in detail in the examples of the present invention belong to the prior art known to professionals in the field. If no specific conditions are specified in the examples of the present invention, the conditions are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used in the examples of the present invention, they are all conventional products that can be purchased commercially.

[0024] The boost-type high-power DC-DC converter circuit of the present invention comprises an input filter circuit, the rear end of which is sequentially connected to a full-bridge conversion circuit, a quasi-resonant circuit and a rectifier filter circuit;

[0025] The input filter circuit includes an input voltage source Vin and input filter capacitors C1 to C4. The positive electrode of the input voltage source Vin is respectively connected to the positive electrodes of the input filter capacitors C1, C2, C3, and C4. The negative electrode of the input voltage source Vin is respectively connected to the negative electrodes of the input filter capacitors C1, C2, C3, and C4. The negative electrode of the input voltage source Vin is also grounded.

[0026] The full-bridge conversion circuit includes switch tubes M1 to M16, transformers T1 to T4, a push-pull quasi-resonant controller U0, and gate drivers US1 to US8. The drains of the switch tubes M1 and M3 are connected to the positive electrode of the input filter capacitor C1, the drains of the switch tubes M5 and M7 are connected to the positive electrode of the input filter capacitor C2, the drains of the switch tubes M9 and M15 are connected to the positive electrode of the input filter capacitor C3, and the drains of the switch tubes M13 and M15 are connected to the positive electrode of the input filter capacitor C4; the drain of the switch tube M2 is respectively connected to the source of the switch tube M1 and the 1st pin of the transformer T1, the drain of the switch tube M4 is respectively connected to the source of the switch tube M3 and the 2nd pin of the transformer T1; the drain of the switch tube M6 is respectively connected to the source of the switch tube M5 and the 1st pin of the transformer T2 , the drain of the switch tube M8 is connected to the source of the switch tube M7 and the pin 2 of the transformer T2; the drain of the switch tube M10 is connected to the source of the switch tube M9 and the pin 1 of the transformer T3, the drain of the switch tube M12 is connected to the source of the switch tube M11 and the pin 2 of the transformer T3; the drain of the switch tube M14 is connected to the source of the switch tube M13 and the pin 1 of the transformer T4, the drain of the switch tube M16 is connected to the source of the switch tube M15 and the pin 2 of the transformer T4; the sources of the switch tubes M2, M4, M6, M8, M10, M12, M14 and M16 are all grounded.

[0027] Pin 4 of transformer T1 is connected to pin 3 of transformer T2, pin 4 of transformer T2 is connected to pin 3 of transformer T3, and pin 4 of transformer T3 is connected to pin 3 of transformer T4.

[0028] The PWMH output end of the push-pull quasi-resonant controller U0 is respectively connected to the HIN end of the gate driver US1, the LIN end of the gate driver US2, the HIN end of the gate driver US3, the LIN end of the gate driver US4, the HIN end of the gate driver US5, the LIN end of the gate driver US6, the HIN end of the gate driver US7, and the LIN end of the gate driver US8, and the PWML output end of the push-pull quasi-resonant controller U0 is respectively connected to the LIN end of the gate driver US1, the HIN end of the gate driver US2, the LIN end of the gate driver US3, the HIN end of the gate driver US4, the LIN end of the gate driver US5, the HIN end of the gate driver US6, the LIN end of the gate driver US7, and the HIN end of the gate driver US8.

[0029] The HO terminal of the gate driver US1 is connected to the gate of the switch tube M1, and the LO terminal is connected to the gate of the switch tube M2. The HO terminal of the gate driver US2 is connected to the gate of the switch tube M3, and the LO terminal is connected to the gate of the switch tube M4. The HO terminal of the gate driver US3 is connected to the gate of the switch tube M5, and the LO terminal is connected to the gate of the switch tube M6. The HO terminal of the gate driver US4 is connected to the gate of the switch tube M7, and the LO terminal is connected to the gate of the switch tube M8. The HO terminal of the gate driver US5 is connected to the gate of the switch tube M9, and the LO terminal is connected to the gate of the switch tube M10. The HO terminal of the gate driver US6 is connected to the gate of the switch tube M11, and the LO terminal is connected to the gate of the switch tube M12. The HO terminal of the gate driver US7 is connected to the gate of the switch tube M13, and the LO terminal is connected to the gate of the switch tube M14. The HO terminal of the gate driver US8 is connected to the gate of the switch tube M15, and the LO terminal is connected to the gate of the switch tube M16.

[0030] The quasi-resonant circuit includes a resonant inductor L0 and a resonant capacitor C0. The resonant inductor L0 and the resonant capacitor C0 are connected in series, and a pin 1 of the resonant inductor is connected to a pin 3 of the transformer T1.

[0031] The rectifier filter circuit includes diodes D1 to D4 and an output filter capacitor C6. The cathode of the diode D1 is connected to the cathode of the diode D3 and the positive electrode of the output filter capacitor C6 respectively, and the anode of the diode D2 is connected to the anode of the diode D4 and the negative electrode of the output filter capacitor C6 respectively; the anode of the diode D1 is connected to the cathode of the diode D2 and the 2nd pin of the resonant capacitor C0 respectively, and the anode of the diode D3 is connected to the cathode of the diode D4 and the 4th pin of the transformer T4 respectively.

[0032] The DC-DC converter function is realized through a full-bridge conversion circuit and a quasi-resonant circuit.

[0033] The rear end of the input filter circuit of the circuit structure is sequentially connected with a full-bridge conversion circuit, a quasi-resonance circuit and a rectification and filtering circuit.

[0034] According to the switch tubes M1-M16, transformers T1-T4, push-pull quasi-resonant controller U0, and gate drivers US1-US8, the switch tubes are driven to realize the output function of the DC-DC converter.

[0035] The DC-DC converter output function is realized by controlling the switch tubes M1 to M16.

[0036] In summary, the boost high-power DC-DC converter circuit of the embodiment of the present invention can reduce the loss caused by switch switching, increase power, improve efficiency and reduce costs.

[0037] The present invention adopts a quasi-resonant soft-switching full-bridge circuit. The switch is switched when the current passing through is 0, which reduces the loss caused by the switch switching. The switching frequency is increased to 70KHz, which reduces the switch tube loss, increases the power in a limited space, improves efficiency and reduces costs.

[0038] In each driving cycle, the switch tube operates in zero current (ZCS) turn-on and turn-off mode, which reduces the heat generated by the switch tube and also reduces the heat dissipation burden for high-power designs.

[0039] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the embodiments of the present invention are described in detail with specific embodiments below.

[0040] Example 1

[0041] like Figure 1 , 2 As shown:

[0042] A boost type high power DC-DC converter circuit, comprising: Figure 1 The boost-type high-power DC-DC converter shown includes an input filter circuit 10, a full-bridge conversion circuit 20, a quasi-resonant circuit 30 and a rectifier filter circuit 40;

[0043] The rear end of the input filter circuit 10 is connected in sequence to a full-bridge conversion circuit 20, a quasi-resonant circuit 30 and a rectifier filter circuit 40;

[0044] The input filter circuit 10 includes an input voltage source Vin and input filter capacitors C1-C4. The positive electrode of the input voltage source Vin is connected to the positive electrodes of the input filter capacitors C1, C2, C3, and C4 respectively, and the negative electrode of the input voltage source Vin is connected to the negative electrodes of the input filter capacitors C1, C2, C3, and C4 respectively. The voltage range of the input voltage source Vin is 18-28V DC, and the input filter capacitors C1-C4 are selected as 10mF large capacitors to filter the input voltage source and store energy.

[0045] The full-bridge conversion circuit 20 includes switch tubes M1-M16, transformers T1-T4, push-pull quasi-resonant controller U0, and gate drivers US1-US8. The circuit topology adopts full-bridge isolation boost to convert the DC 18-28V supplied by the battery into a 310V-400V high-voltage DC bus voltage. The switch tubes M1-M4, M5-M8, M9-M12, and M13-M16 each form four full-bridge circuits, which are respectively connected to the front stage of the transformer T1-T4, and the rear stage of the transformer T1-T4 is connected in series, which can further improve the load capacity of the converter.

[0046] Reference Figure 2As shown, the PWMH output end of the push-pull quasi-resonant controller U0 is respectively connected to the HIN end of the gate driver US1, the LIN end of the gate driver US2, the HIN end of the gate driver US3, the LIN end of the gate driver US4, the HIN end of the gate driver US5, the LIN end of the gate driver US6, the HIN end of the gate driver US7, and the LIN end of the gate driver US8, and the PWML output end of the push-pull quasi-resonant controller U0 is respectively connected to the LIN end of the gate driver US1, the HIN end of the gate driver US2, the LIN end of the gate driver US3, the HIN end of the gate driver US4, the LIN end of the gate driver US5, the HIN end of the gate driver US6, the LIN end of the gate driver US7, and the HIN end of the gate driver US8. The push-pull quasi-resonant controller U0 uses the domestic chip EG1611, which can generate a PWM complementary signal with a frequency of 70KHz, a duty cycle of 50%, and a dead zone of 500nS for the upper and lower tubes, and outputs it to the gate drivers US1~US8, and the driving ability is improved after the driving signal is amplified.

[0047] The gate drivers US1~US8 use the domestically produced chip EG2132, which has the functions of dead time control and level conversion. The maximum input of the high-end upper bridge arm and the low-end lower bridge arm output driver can reach 1.5A and the maximum output current can reach 1A. The high-end upper bridge arm channel can withstand a voltage of 300V, and the conduction delay between the input logic signal and the output control signal is small.

[0048] The quasi-resonant circuit 30 includes a resonant inductor L0 and a resonant capacitor C0, which form a series resonance. During debugging, the PWM frequency of the push-pull quasi-resonant controller U0 is adjusted to correspond to the resonance point of L0 and C0, so that the full-bridge conversion circuit can achieve zero current (ZCS) opening and closing. The switch is switched when the current passing through is 0, which reduces the loss caused by the switch switching.

[0049] The resonant frequency is calculated according to the formula:

[0050]

[0051] Where L0 includes the leakage inductance of the transformer.

[0052] The rectifier filter circuit 40 includes diodes D1-D4 and an output filter capacitor C6. The cathode of the diode D1 is connected to the cathode of the diode D3 and the positive electrode of the output filter capacitor C6 respectively, and the anode of the diode D2 is connected to the anode of the diode D4 and the negative electrode of the output filter capacitor C6 respectively; the anode of the diode D1 is connected to the cathode of the diode D2 and the 2nd pin of the resonant capacitor C0 respectively, and the anode of the diode D3 is connected to the cathode of the diode D4 and the 4th pin of the transformer T4 respectively. The output rectifier bridge is composed of diodes D1-D4, and a relatively smooth DC high voltage is obtained after filtering by the capacitor C6.

[0053] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A boost type high power DC-DC converter circuit, characterized in that: It includes an input filter circuit, the rear end of which is sequentially connected to a full-bridge conversion circuit, a quasi-resonant circuit and a rectifier filter circuit; The input filter circuit comprises an input voltage source (Vin), four input filter capacitors (C1, C2, C3, C4), the positive electrode of the input voltage source (Vin) is respectively connected to the positive electrodes of the four input filter capacitors (C1, C2, C3, C4), the negative electrode of the input voltage source (Vin) is respectively connected to the negative electrodes of the four input filter capacitors (C1, C2, C3, C4), and the negative electrode of the input voltage source (Vin) is also grounded; The full-bridge conversion circuit includes sixteen switch tubes (M1-M16), four transformers (T1-T4), a push-pull quasi-resonant controller (U0), and eight gate drivers (US1-US8); The drain electrodes of the switch tubes (M1 and M3) are connected to the positive electrode of the input filter capacitor 1 (C1), the drain electrodes of the switch tubes (M5 and M7) are connected to the positive electrode of the input filter capacitor 2 (C2), the drain electrodes of the switch tubes (M9 and M15) are connected to the positive electrode of the input filter capacitor 3 (C3), and the drain electrodes of the switch tubes (M13 and M15) are connected to the positive electrode of the input filter capacitor 4 (C4); The drain of switch tube 2 (M2) is connected to the source of switch tube 1 (M1) and pin 1 of transformer 1 (T1), the drain of switch tube 4 (M4) is connected to the source of switch tube 3 (M3) and pin 2 of transformer 1 (T1); the drain of switch tube 6 (M6) is connected to the source of switch tube 5 (M5) and pin 1 of transformer 2 (T2), the drain of switch tube 8 (M8) is connected to the source of switch tube 7 (M7) and pin 2 of transformer 2 (T2); the drain of switch tube 10 (M10) is connected to the source of switch tube 9 (M9) and pin 1 of transformer 2 (T2); the drain of switch tube 11 (M12) is connected to the source of switch tube 12 (M13) and pin 1 of transformer 1 (T1); the drain of switch tube 13 (M14) is connected to the source of switch tube 14 (M15) and pin 1 of transformer 1 (T1); the drain of switch tube 15 (M16) is connected to the source of switch tube 17 (M17) and pin 1 of transformer 1 (T2); the drain of switch tube 10 (M10) is connected to the source of switch tube 18 (M19) and pin 2 of transformer 1 (T2); the drain of switch tube 11 (M12) is connected to the source of switch tube 12 (M13) and pin 1 of transformer 1 (T1); the drain of switch tube 12 (M14) is connected to the source of switch tube 13 (M15) and pin 1 of transformer 1 (T1); the drain of switch tube 13 (M15) is connected to the source of switch tube 14 (M16) and pin 1 of transformer 1 The drain of the switch tube 12 (M12) is connected to the source of the switch tube 11 (M11) and the pin 2 of the transformer 3 (T3); the drain of the switch tube 14 (M14) is connected to the source of the switch tube 13 (M13) and the pin 1 of the transformer 4 (T4); the drain of the switch tube 16 (M16) is connected to the source of the switch tube 15 (M15) and the pin 2 of the transformer 4 (T4); the sources of the switch tubes (M2, M4, M6, M8, M10, M12, M14, M16) are all grounded; The 4th pin of transformer 1 (T1) is connected to the 3rd pin of transformer 2 (T2), the 4th pin of transformer 2 (T2) is connected to the 3rd pin of transformer 3 (T3), and the 4th pin of transformer 3 (T3) is connected to the 3rd pin of transformer 4 (T4); The PWMH output terminal of the push-pull quasi-resonant controller (U0) is respectively connected to the HIN terminal of the gate driver one (US1), the LIN terminal of the gate driver two (US2), the HIN terminal of the gate driver three (US3), the LIN terminal of the gate driver four (US4), the HIN terminal of the gate driver five (US5), the LIN terminal of the gate driver six (US6), the HIN terminal of the gate driver seven (US7), and the LIN terminal of the gate driver eight (US8), and the PWML output terminal of the push-pull quasi-resonant controller (U0) is respectively connected to the LIN terminal of the gate driver one (US1), the HIN terminal of the gate driver two (US2), the LIN terminal of the gate driver three (US3), the HIN terminal of the gate driver four (US4), the LIN terminal of the gate driver five (US5), the HIN terminal of the gate driver six (US6), the LIN terminal of the gate driver seven (US7), and the HIN terminal of the gate driver eight (US8); The HO terminal of gate driver one (US1) is connected to the gate of switch tube one (M1), and the LO terminal is connected to the gate of switch tube two (M2). The HO terminal of gate driver two (US2) is connected to the gate of switch tube three (M3), and the LO terminal is connected to the gate of switch tube four (M4). The HO terminal of gate driver three (US3) is connected to the gate of switch tube five (M5), and the LO terminal is connected to the gate of switch tube six (M6). The HO terminal of gate driver four (US4) is connected to the gate of switch tube seven (M7), and the LO terminal is connected to the gate of switch tube eight (M8). The HO terminal of gate driver (US5) is connected to the gate of switch tube nine (M9), and the LO terminal is connected to the gate of switch tube ten (M10); the HO terminal of gate driver six (US6) is connected to the gate of switch tube eleven (M11), and the LO terminal is connected to the gate of switch tube twelve (M12); the HO terminal of gate driver seven (US7) is connected to the gate of switch tube thirteen (M13), and the LO terminal is connected to the gate of switch tube fourteen (M14); the HO terminal of gate driver eight (US8) is connected to the gate of switch tube fifteen (M15), and the LO terminal is connected to the gate of switch tube sixteen (M16); The quasi-resonant circuit comprises a resonant inductor (L0) and a resonant capacitor (C0), the resonant inductor (L0) and the resonant capacitor (C0) are connected in series, and the pin 1 of the resonant inductor is connected to the pin 3 of the transformer 1 (T1); The rectifier filter circuit comprises diodes (D1-D4) and an output filter capacitor (C6); the cathode of diode one (D1) is respectively connected to the cathode of diode three (D3) and the positive electrode of the output filter capacitor (C6); the anode of diode two (D2) is respectively connected to the anode of diode four (D4) and the negative electrode of the output filter capacitor (C6); the anode of diode one (D1) is respectively connected to the cathode of diode two (D2) and the 2nd pin of the resonant capacitor (C0); the anode of diode three (D3) is respectively connected to the cathode of diode four (D4) and the 4th pin of transformer four (T4).

2. The boost high-power DC-DC converter circuit according to claim 1, characterized in that: The DC-DC converter function is realized through a full-bridge conversion circuit and a quasi-resonant circuit.

3. The boost type high power DC-DC converter circuit according to claim 2, characterized in that: The rear end of the input filter circuit of the circuit structure is sequentially connected with a full-bridge conversion circuit, a quasi-resonance circuit and a rectification and filtering circuit.

4. The boost high-power DC-DC converter circuit according to claim 3 is characterized in that: According to the switch tube (M1~M16), the transformer (T1~T4), the push-pull quasi-resonant controller (U0), and the gate driver (US1~US8), the switch tube is driven to realize the DC-DC converter output function.

5. The boost type high power DC-DC converter circuit according to claim 4, characterized in that: The DC-DC converter output function is realized by controlling the switch tubes (M1 to M16).

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