CN219087004U

CN219087004U - Power supply conversion circuit

Info

Publication number: CN219087004U
Application number: CN202223225376.1U
Authority: CN
Inventors: 高凯; 田树露; 陈静
Original assignee: Suzhou Gaopeng Optoelectronics Technology Co ltd
Current assignee: Suzhou Gaopeng Optoelectronics Technology Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-05-26
Anticipated expiration: 2032-12-02

Abstract

The application provides a power supply conversion circuit, which comprises a voltage control circuit and a switching power supply circuit, wherein the output end of a grid driving chip is connected with the grid of a bleeder triode and used for controlling whether the bleeder triode bleeder current or not, and the source electrode of the bleeder triode is grounded and used for bleeder current; the power interface is connected with an input power supply, the input power supply is DC30V-DC150V, the output end of the power interface is connected with an iron core inductor and the input end of a grid driving chip, the output end of the iron core inductor is connected with an energy storage circuit and the drain electrode of a bleeder triode, the energy storage circuit is used for storing energy and boosting, the output end of the energy storage circuit is connected with the input end of the grid driving chip and the output interface, the output interface outputs voltage A, the voltage A is DC95-DC100V, and the grid driving chip is used for starting the bleeder triode to bleed current when the input voltage is lower than the voltage A and is not working and higher than the voltage A; the output interface is connected with a switching power supply circuit, the switching power supply circuit is used for reducing voltage to provide working power for a working system, and the working voltage of a power supply chip is more than DC80V.

Description

Power supply conversion circuit

Technical Field

The utility model relates to the technical field of electricity, in particular to a power supply conversion circuit.

Background

The power conversion circuit is generally used for converting and reducing power sources such as an accessed commercial power source, a battery and the like, and then outputting voltage to provide working voltage for a working system of the device or the module, wherein the working system generally comprises a main control MCU circuit, an induction circuit, a driving control circuit and the like, and the working voltage of the working system is generally 3.3V, 5V, 8.2V, 16V and the like. However, the voltage supplied to the power supply input fluctuates widely, particularly in iron tower and base station applications. For example, the DC48V is connected to the power supply input, but the fluctuation of the DC48V-DC70V is between the DC48V and the DC70V, if the common 48V converting tube is used for carrying out buck conversion to obtain the working voltage, the working voltage is higher, and particularly when the charging is carried out, the working system is burnt out due to the higher charging voltage.

For a wide range of access power sources, the prior art has also made some improvements for the purpose of stabilizing the output of the power conversion circuit, for example, patent CN209948779U discloses a switching power supply circuit for battery charging, which is suitable for voltage input in the range of DC7V-DC60V and then outputting DC12V. In the first aspect, the device is suitable for application in a low-voltage range, is not suitable for input in a high-voltage range, has a narrow application range and has poor application. And the voltage control and the voltage reduction of the power supply are easy to realize when the power supply is connected with the voltage of less than 30V. In the second aspect, only the switching power supply chip LT8930 is used for voltage control and voltage reduction, and the output is not stable and the reliability is low.

In view of this, the present application provides a power conversion circuit suitable for a wide range of input power sources of DC30V-DC150V, and constantly outputting the working power source required by the working system.

Disclosure of Invention

The utility model aims to provide a power supply conversion circuit which is suitable for an input power supply with a wide DC30V-DC150V range and always stably outputs a working power supply required by a working system.

The power supply conversion circuit is applicable to a wide range of input power supplies, DC30V-DC150V is applicable, and working power supplies required by a working system are always and stably output, such as DC3.3V, DC5V, DC V and the like. In the first aspect, a voltage control circuit is designed, and the output voltage of the voltage control circuit is always about DC98V in the range of DC30V-DC150V, namely the output voltage A is always about DC95-DC100V. The output voltage A is output to the switching power supply circuit, the working voltage requirement of the power supply chip IC2 of the switching power supply circuit is larger than DC80V, the switching power supply circuit works higher than the DC80V, and the switching power supply circuit does not work lower than the DC80V, so that the switching power supply circuit is applicable to the output voltage A. In the second aspect, when the input power supply is lower than A, the iron core inductor and the energy storage circuit are adopted to store energy and boost the voltage to the output A, in order to prevent continuous over-high energy storage, the voltage-stabilizing bleeder circuit is adopted to carry out bleeder current, wherein a grid driving chip of the voltage-stabilizing bleeder circuit does not work and does not start bleeder current when the input voltage is lower than A, and works and starts bleeder current when the input voltage is higher than A, so that the voltage output by the voltage-stabilizing circuit is stable in the range of A. When the input power supply is higher than A, the grid driving chip immediately works to start current discharge, and the discharge is carried out to the range output of A, so that the output of the voltage control circuit is always stabilized in the range of A. The applicant has completed the present application on this basis.

The power supply conversion circuit comprises a voltage control circuit and a switching power supply circuit, wherein the voltage control circuit comprises a power supply interface, an iron core inductor, an energy storage circuit, an output interface and a voltage stabilizing bleeder circuit, the voltage stabilizing bleeder circuit comprises a grid driving chip and a bleeder triode, the output end of the grid driving chip is connected with the grid of the bleeder triode and used for controlling whether the bleeder triode bleeder current or not, and the source electrode of the bleeder triode is grounded and used for bleeder current; the power interface is connected with an input power supply, the input power supply is DC30V-DC150V, the output end of the power interface is connected with an iron core inductor and the input end of a grid driving chip, the output end of the iron core inductor is connected with an energy storage circuit and the drain electrode of a bleeder triode, the energy storage circuit is used for storing energy and boosting, the output end of the energy storage circuit is connected with the input end of the grid driving chip and the output interface, the output interface outputs voltage A, the voltage A is DC95-DC100V, and the grid driving chip is used for starting the bleeder triode to bleed current when the input voltage is lower than the voltage A and is not working and higher than the voltage A; the output interface is connected with a switching power supply circuit which is used for reducing the voltage to provide working power for the working system, and the working voltage of a power chip of the switching power supply circuit

DC80V。

In some embodiments, a fuse F2 and a bridge rectifier BD2 are further disposed between the power interface and the iron core inductor, an output end of the power interface is connected with the fuse F2 and an input end of the bridge rectifier BD2, the other end of the fuse F2 is connected with an input end of the bridge rectifier BD2 and an input end of the gate driving chip, the fuse F2 plays a role in overvoltage protection, an output end of the bridge rectifier BD2 is connected with an input end of the iron core inductor, the bridge rectifier BD2 plays a role in anti-connection, and an output end of the iron core inductor is connected with an input end of the energy storage circuit and a drain electrode of the bleeder triode.

Further, one output pin of the power interface J6 is connected with one end of a fuse F2, the other end of the fuse F2 is connected with the 1 pin of the bridge rectifier BD2 and the input end of the grid driving chip, the other output pin of the power interface J6 is connected with the 3 pin of the bridge rectifier BD2, the 2 pin of the bridge rectifier BD2 is connected with the iron core inductor L1 and one end of the super capacitor E3, the other end of the super capacitor E3 is grounded with the 4 pin of the bridge rectifier BD2, and the other end of the iron core inductor L1 is connected with the input end of the energy storage circuit and the drain electrode of the bleeder triode.

In some embodiments, the energy storage circuit includes a super capacitor E4, a capacitor C8 and a resistor R15, where the super capacitor E4 plays a role of energy storage and voltage boosting, the output end of the iron core inductor L1 is connected with one ends of the super capacitor E4, the capacitor C8 and the resistor 15 in sequence, the other ends of the super capacitor E4 and the capacitor C8 are grounded, one end of the resistor 15 is connected with the input end of the gate driving chip through a VCC pin and connected with the output interface J7, and the other end is grounded and connected with the output interface J7.

Further, the output end of the iron core inductor L1 is sequentially connected with one end of a super capacitor E4, a capacitor C8 and a resistor 15 through a diode D6, the super capacitor E4 is 1000UF, one end of the resistor R15 outputs a VCC pin and is connected with a 3 pin of an output interface J7, the other end of the resistor R15 is grounded and is connected with a 1 pin of the output interface J7, and the resistor R15 is 51K.

In some facts, the output end of the fuse F2 is connected with the VCC pin and the VB pin of the gate driving chip U1 through a protection circuit, the protection circuit plays a role in input protection, the output end of the energy storage circuit is connected with the RT pin and the CT pin of the gate driving chip U1 through a high-voltage switch circuit, the high-voltage switch circuit plays a role in cutting off or closing no-load current and load current, the gate driving chip U1 is an IR2153 half-bridge driver, and the HO pin of the gate driving chip U1 is connected with the gate of the bleeder triode Q3.

When the voltage input into the grid driving chip U1 through the fuse F2 is lower than A, the grid driving chip U1 does not work, the bleeder transistor Q3 does not work, and continuous energy storage and boosting are carried out through the iron core inductor and the energy storage circuit; when the voltage of the energy storage is too high and is higher than A, as the output pin VCC pin of the energy storage circuit is connected with the RT pin and the CT pin of the grid driving chip U1, the grid driving chip U1 works and starts the bleeder transistor Q3 to bleeder current, so that the voltage output by the output interface J7 is stabilized in the range of A. When the voltage input into the grid driving chip U1 through the fuse F2 is higher than A, the grid driving chip U1 works, the bleeder transistor Q3 is started to bleeder current, the voltage input from the VCC pin which is bleeder to the energy storage circuit is in the range of A, the input power supply is in the range of DC30V-DC150V wide range, and the voltage output by the output interface J7 is always stabilized in the range of A.

Further, the bleeder transistor Q3 is an N-type MOS transistor, and a resistor R16 is connected between the gate and the source of the bleeder transistor Q3, where the resistor R16 is 10K.

Further, the protection circuit includes a diode D5, a resistor R13, a resistor R14, a zener diode D7 and a super capacitor E5, the output end of the fuse F2 is connected with the positive electrode of the diode D5, the negative electrode of the diode D5 is connected with one ends of the resistor R13 and the resistor R14, the other ends of the resistor R13 and the resistor R14 are connected with the VCC pin and the VB pin of the gate driving chip U1 and connected with the negative electrode of the zener diode D7 and one end of the super capacitor E5, and the positive electrode of the zener diode D7 and the other end of the super capacitor E5 are grounded.

Further, the high-voltage switch circuit comprises an LED lamp LED4, a voltage stabilizing diode D9, a voltage stabilizing diode D8, a triode Q4 and a resistor R17, wherein the output end of the energy storage circuit is connected with the LED lamp LED4 through a VCC pin, the other end of the LED lamp LED4 is connected with the cathode of the voltage stabilizing diode D9, the voltage stabilizing diode D9 is connected with the voltage stabilizing diode D8 in series, the anode of the voltage stabilizing diode D8 is connected with the base electrode of the triode Q4, the collector of the triode Q4 is connected with the RT pin of the grid driving chip U1 through the resistor R17 and is directly connected with the CT pin of the grid driving chip U1, and the emitter of the triode Q4 is grounded.

In some embodiments, the output interface J7 is connected to the input interface J9 of the switching power supply circuit, the switching power supply circuit further includes a filter protection circuit, a current limiting circuit, a first voltage reducing circuit and a second voltage reducing circuit, the output end of the input interface J9 is connected to the filter protection circuit and the current limiting circuit, the filter protection circuit plays roles in filtering and overvoltage protection, the current limiting circuit plays roles in current limiting, the output ends of the filter protection circuit and the current limiting circuit are connected to the input end of the power chip IC2 of the first voltage reducing circuit, the first voltage reducing circuit is used for reducing the voltage to DC16V to be output through the VCC1 pin and providing the working power for the working system, the output end of the first voltage reducing circuit is connected to the second voltage reducing circuit, and the second voltage reducing circuit is used for reducing the voltage to dc3.3v to be output through the VCC2 pin and providing the working power for the working system.

Further, the filter protection circuit includes a fuse resistor R25, a fuse resistor R24, a capacitor C11, a capacitor C12 and a super capacitor E12, one output end of the input interface J9 is connected with one end of the fuse resistor R25, the fuse resistor R25 is connected in series with the fuse resistor R24, the other end of the fuse resistor R24 is connected with the capacitor C11, the capacitor C12 and the super capacitor E12 in sequence, the capacitor C11, the capacitor C12 and the super capacitor E12 are connected in parallel, and the other end of the capacitor is grounded.

Further, the current limiting circuit includes a capacitor C16, a resistor R27, a resistor R21 and a resistor R26, where the other output end of the input interface J9 is sequentially connected to one ends of the capacitor C16 and the resistor R27, the other ends of the capacitor C16 and the resistor R27 are connected to the resistor R21, the resistor R21 is connected in series with the resistor R26, and the other end of the resistor R26 is connected to the input end of the power chip IC 2.

Further, the power chip IC2 is configured to reduce the voltage to DC16V and output the voltage through the VCC1 pin after the voltage stabilizing and filtering, the second voltage reducing circuit includes a voltage stabilizing circuit, a second voltage reducing chip IC1, and a filter circuit, where an output end of the first voltage reducing circuit is connected to the voltage stabilizing circuit, an output end of the voltage stabilizing circuit is connected to an input end of the second voltage reducing chip IC1, the second voltage reducing chip IC1 reduces the voltage to dc3.3v, an output end of the second voltage reducing chip IC1 is connected to the filter circuit, and the filter circuit is configured to provide a dc3.3v working power supply for the working system through an output pin VCC2 pin.

Drawings

The foregoing and other features of the present application will be more fully described when read in conjunction with the following drawings. It is appreciated that these drawings depict only several embodiments of the present application and are therefore not to be considered limiting of its scope. The present application will be described more specifically and in detail by using the accompanying drawings.

Fig. 1 is a circuit diagram of a voltage control circuit of a power conversion circuit of the present application.

Fig. 2 is a circuit diagram of a switching power supply circuit of the power supply conversion circuit of the present application.

Detailed Description

The following examples are described to aid in the understanding of the present application and are not, nor should they be construed in any way to limit the scope of the present application.

In the following description, those skilled in the art will recognize that components may be described as separate functional units (which may include sub-units) throughout this discussion, but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including integration within a single system or component). The connection between components or systems is not intended to be limited to a direct connection. Rather, data between these components may be modified, reformatted, or otherwise changed by intermediate components. In addition, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" are to be construed as including direct connection, indirect connection or fixation through one or more intermediaries.

Example 1:

the power supply conversion circuit comprises a voltage control circuit and a switching power supply circuit, wherein the voltage control circuit comprises a power supply interface, an iron core inductor, an energy storage circuit, an output interface and a voltage stabilizing bleeder circuit, the voltage stabilizing bleeder circuit comprises a grid driving chip and a bleeder triode, the output end of the grid driving chip is connected with the grid of the bleeder triode and used for controlling whether the bleeder triode bleeds current or not, and the source electrode of the bleeder triode is grounded and used for bleeds current; the power interface is connected with an input power supply, the input power supply is DC30V-DC150V, the output end of the power interface is connected with an iron core inductor and the input end of a grid driving chip, the output end of the iron core inductor is connected with an energy storage circuit and the drain electrode of a bleeder triode, the energy storage circuit is used for storing energy and boosting, the output end of the energy storage circuit is connected with the input end of the grid driving chip and the output interface, the output interface outputs voltage A, the voltage A is DC95-DC100V, and the grid driving chip is used for starting the bleeder triode to bleed current when the input voltage is lower than the voltage A and is not working and higher than the voltage A; the output interface is connected with a switching power supply circuit, and the switching power supply circuit is used for reducing voltage to provide working power for a working system, and the working voltage of a power supply chip of the switching power supply circuit is more than DC80V.

The voltage control circuit is shown in fig. 1, the 2 feet of the power interface J6 are connected with one end of the fuse F2, the other end of the fuse F2 is connected with the 1 feet of the bridge rectifier BD2 and the input end of the grid driving chip, the 1 feet of the power interface J6 are connected with the 3 feet of the bridge rectifier BD2, the 2 feet of the bridge rectifier BD2 are connected with the iron core inductor L1 and one end of the super capacitor E3, the other end of the super capacitor E3 is grounded with the 4 feet of the bridge rectifier BD2, and the super capacitor E3 is 1000UF/100V. The other end of the iron core inductor L1 is connected with the input end of the energy storage circuit and the drain electrode of the bleeder triode. The energy storage circuit comprises a super capacitor E4, a capacitor C8 and a resistor R15, wherein the positive electrode of a diode D6 of the energy storage circuit at the output end of an iron core inductor L1 is connected, the negative electrode of the diode D6 is respectively connected with one ends of the super capacitor E4, the capacitor C8 and a resistor 15 in sequence, the super capacitor E4 and the capacitor C8 are connected in parallel, the other ends of the super capacitor E4 and the capacitor C8 are grounded, the super capacitor E4 is 1000UF/160V, one end of the resistor 15 is connected with the input end of a grid driving chip through a VCC pin and is connected with the 3 pin of an output interface J7, and the other end of the resistor 15 is grounded and connected with the 1 pin of the output interface J7. The output end of the fuse F2 is connected with a VCC pin and a VB pin of the grid driving chip U1 through a protection circuit, the protection circuit plays a role in input protection, the output end of the energy storage circuit is connected with a RT pin and a CT pin of the grid driving chip U1 through a high-voltage switch circuit, the high-voltage switch circuit plays a role in cutting off or closing no-load current and load current, the grid driving chip U1 is a high-voltage, high-speed and high-end-drive half-bridge driver with a model of IR2153 of Shenzhen Katsu, and a HO pin of the grid driving chip U1 is connected with a grid of the bleeder triode Q3. When the voltage input into the grid driving chip U1 through the fuse F2 is lower than A, the grid driving chip U1 does not work, the bleeder transistor Q3 does not work, and continuous energy storage and boosting are carried out through the iron core inductor and the energy storage circuit; when the voltage of the energy storage is too high and is higher than A, as the output pin VCC pin of the energy storage circuit is connected with the RT pin and the CT pin of the grid driving chip U1, the grid driving chip U1 works and starts the bleeder transistor Q3 to bleeder current, so that the voltage output by the output interface J7 is stabilized in the range of A. When the voltage input into the grid driving chip U1 through the fuse F2 is higher than A, the grid driving chip U1 works, the bleeder transistor Q3 is started to bleeder current, the voltage input from the VCC pin which is bleeder to the energy storage circuit is in the range of A, the input power supply is in the range of DC30V-DC150V wide range, and the voltage output by the output interface J7 is always stabilized in the range of A.

The bleeder transistor Q3 is an N-type MOS transistor, a resistor R16 is connected between the grid electrode and the source electrode of the bleeder transistor Q3, and the resistor R16 is 10K. The protection circuit comprises a diode D5, a resistor R13, a resistor R14, a voltage stabilizing diode D7 and a super capacitor E5, wherein the output end of a fuse F2 is connected with the positive electrode of the diode D5, the negative electrode of the diode D5 is respectively connected with one ends of the resistor R13 and the resistor R14, the resistor R13 is connected with the resistor R14 in parallel and is 2K, the other ends of the resistor R13 and the resistor R14 are connected with the VCC pin and the VB pin of a grid driving chip U1 and are connected with the negative electrode of the voltage stabilizing diode D7 and one end of the super capacitor E5, the positive electrode of the voltage stabilizing diode D7 and the other end of the super capacitor E5 are grounded, and the super capacitor E5 is 1000UF/16V. The high-voltage switch circuit comprises an LED lamp LED4, a voltage stabilizing diode D9, a voltage stabilizing diode D8, a resistor R19, a triode Q4, a capacitor C9 and a resistor R17, wherein the output end of the energy storage circuit is connected with the LED lamp LED4 through a VCC pin, the other end of the LED lamp LED4 is connected with the negative electrode of the voltage stabilizing diode D9, the voltage stabilizing diode D9 is sequentially connected with the voltage stabilizing diode D8 and the resistor R19 in series, the other end of the resistor R19 is connected with the base electrode of the triode Q4, the resistor R19 is 10K, the collector electrode of the triode Q4 is connected with the RT pin of the grid driving chip U1 through the resistor R17 and is directly connected with the CT pin of the grid driving chip U1, the emitter of the triode Q4 is grounded, a resistor R18 is connected between the base electrode and the emitter of the triode, and the CT pin of the grid driving chip U1 is grounded after being connected with the capacitor C9.

The switching power supply circuit is shown in fig. 2, the output interface J7 is connected with the input interface J9 of the switching power supply circuit, the switching power supply circuit further comprises a filtering protection circuit, a current limiting circuit, a first voltage reducing circuit and a second voltage reducing circuit, the output end of the input interface J9 is connected with the filtering protection circuit and the current limiting circuit, the filtering protection circuit plays roles of filtering and overvoltage protection, the current limiting circuit plays roles of current limiting, the output ends of the filtering protection circuit and the current limiting circuit are connected with the input end of the power supply chip IC2 of the first voltage reducing circuit, the first voltage reducing circuit is used for reducing the voltage to DC16V to be output through a VCC1 pin and providing a working power supply for a working system, the output end of the first voltage reducing circuit is connected with the second voltage reducing circuit is used for reducing the voltage to dc3.3v to be output through a VCC2 pin and providing the working power supply for the working system.

The filter protection circuit comprises a fuse resistor R25, a fuse resistor R24, a capacitor C11, a capacitor C12 and a super capacitor E12, wherein one output end of an input interface J9 is connected with one end of the fuse resistor R25, the fuse resistor R25 is connected with the fuse resistor R24 in series, the other end of the fuse resistor R24 is connected with the capacitor C11, the capacitor C12 and the super capacitor E12 in sequence, and the capacitor C11, the capacitor C12 and the super capacitor E12 are connected in parallel and the other end of the capacitor E12 is grounded. The current limiting circuit comprises a capacitor C16, a resistor R27, a resistor R21 and a resistor R26, wherein the other output end of the input interface J9 is sequentially connected with one ends of the capacitor C16 and the resistor R27, the other ends of the capacitor C16 and the resistor R27 are connected with the resistor R21, the resistor R21 is connected with the resistor R26 in series, and the other end of the resistor R26 is connected with the input end of the power chip IC 2. The power chip IC2 is used for reducing the voltage to DC16V and outputting the voltage through a VCC1 pin after stabilizing and filtering, and the stabilizing and filtering comprises a diode D10, an inductor L2, a super capacitor E6 and a stabilizing diode D11. The second voltage-reducing circuit comprises a voltage-stabilizing circuit, a second voltage-reducing chip IC1 and a filter circuit, wherein the output end of the first voltage-reducing circuit is connected with the voltage-stabilizing circuit, the voltage-stabilizing circuit is composed of a resistor R20, a voltage-stabilizing diode D24 and a super capacitor E8, the voltage at the position of the voltage-stabilizing diode D24 is DC8.2V, the output end of the voltage-stabilizing circuit is connected with the input end of the second voltage-reducing chip IC1, the voltage of the second voltage-reducing chip IC1 is reduced to DC3.3V, the output end of the second voltage-reducing chip IC1 is connected with the filter circuit, the filter circuit is composed of a super capacitor E7, a voltage-stabilizing diode D16 and a capacitor C10, and the filter circuit is used for providing a DC3.3V working power supply for a working system through an output pin VCC 2.

While various aspects and embodiments have been disclosed, other aspects and embodiments will be apparent to those skilled in the art, and many changes and modifications can be made without departing from the spirit of the application, which is intended to be within the scope of the utility model. The various aspects and embodiments disclosed herein are for illustration only and are not intended to limit the application, the actual scope of which is subject to the claims.

Claims

1. The power supply conversion circuit is characterized by comprising a voltage control circuit and a switching power supply circuit, wherein the voltage control circuit comprises a power supply interface, an iron core inductor, an energy storage circuit, an output interface and a voltage stabilizing bleeder circuit, the voltage stabilizing bleeder circuit comprises a grid driving chip and a bleeder triode, the output end of the grid driving chip is connected with the grid of the bleeder triode and used for controlling whether the bleeder triode bleeder current or not, and the source electrode of the bleeder triode is grounded and used for bleeder current; the power interface is connected with an input power supply, the input power supply is DC30V-DC150V, the output end of the power interface is connected with an iron core inductor and the input end of a grid driving chip, the output end of the iron core inductor is connected with an energy storage circuit and the drain electrode of a bleeder triode, the energy storage circuit is used for storing energy and boosting, the output end of the energy storage circuit is connected with the input end of the grid driving chip and the output interface, the output interface outputs voltage A, the voltage A is DC95-DC100V, and the grid driving chip is used for starting the bleeder triode to bleed current when the input voltage is lower than the voltage A and is not working and higher than the voltage A; the output interface is connected with a switching power supply circuit, and the switching power supply circuit is used for reducing voltage to provide working power for a working system, and the working voltage of a power supply chip of the switching power supply circuit is more than DC80V.

2. The power conversion circuit according to claim 1, wherein a fuse F2 and a bridge rectifier BD2 are further provided between the power interface and the core inductor, an output end of the power interface is connected to the fuse F2 and an input end of the bridge rectifier BD2, the other end of the fuse F2 is connected to an input end of the bridge rectifier BD2 and an input end of the gate driving chip, the fuse F2 plays a role in overvoltage protection, an output end of the bridge rectifier BD2 is connected to an input end of the core inductor, the bridge rectifier BD2 plays a role in anti-reverse connection, and an output end of the core inductor is connected to an input end of the energy storage circuit and a drain electrode of the bleeder triode.

3. The power conversion circuit according to claim 2, wherein one output pin of the power interface J6 is connected to one end of a fuse F2, the other end of the fuse F2 is connected to the 1 pin of the bridge rectifier BD2 and the input end of the gate driving chip, the other output pin of the power interface J6 is connected to the 3 pin of the bridge rectifier BD2, the 2 pin of the bridge rectifier BD2 is connected to one end of the iron core inductor L1 and the super capacitor E3, the other end of the super capacitor E3 is grounded to the 4 pin of the bridge rectifier BD2, and the other end of the iron core inductor L1 is connected to the input end of the tank circuit and the drain electrode of the bleeder triode.

4. The power conversion circuit according to claim 1, wherein the energy storage circuit comprises a super capacitor E4, a capacitor C8 and a resistor R15, the super capacitor E4 plays a role of energy storage and voltage boosting, the output end of the iron core inductor L1 is sequentially connected with one ends of the super capacitor E4, the capacitor C8 and the resistor 15 respectively, the other ends of the super capacitor E4 and the capacitor C8 are grounded, and one end of the resistor 15 is connected with the input end of the gate driving chip through a VCC pin and is connected with the output interface J7, and the other end is grounded and is connected with the output interface J7.

5. The power conversion circuit according to claim 4, wherein an output terminal of the core inductor L1 is sequentially connected to a super capacitor E4, a capacitor C8 and one terminal of a resistor 15 through a diode D6, the super capacitor E4 is 1000UF, one terminal of the resistor R15 outputs a VCC pin and is connected to a 3 pin of the output interface J7, the other terminal of the resistor R15 is grounded and is connected to a 1 pin of the output interface J7, and the resistor R15 is 51K.

6. The power conversion circuit according to claim 1, wherein the output terminal of the fuse F2 is connected to the VCC pin and the VB pin of the gate driving chip U1 through a protection circuit, the protection circuit plays a role in input protection, the output terminal of the tank circuit is connected to the RT pin and the CT pin of the gate driving chip U1 through a high voltage switching circuit, the high voltage switching circuit plays a role in cutting off or closing the no-load current and the load current, the gate driving chip U1 is an IR2153 half-bridge driver, and the HO pin of the gate driving chip U1 is connected to the gate of the bleeder transistor Q3.

7. The power conversion circuit according to claim 6, wherein the protection circuit includes a diode D5, a resistor R13, a resistor R14, a zener diode D7, and a super capacitor E5, an output terminal of the fuse F2 is connected to an anode of the diode D5, cathodes of the diode D5 are respectively connected to one ends of the resistor R13 and the resistor R14, the other ends of the resistor R13 and the resistor R14 are connected to VCC and VB pins of the gate driving chip U1 and to one ends of the cathode of the zener diode D7 and the super capacitor E5, and anodes of the zener diode D7 and the other ends of the super capacitor E5 are grounded.

8. The power conversion circuit according to claim 6, wherein the high-voltage switching circuit comprises an LED lamp LED4, a zener diode D9, a zener diode D8, a triode Q4 and a resistor R17, wherein an output end of the tank circuit is connected with the LED lamp LED4 through a VCC pin, the other end of the LED lamp LED4 is connected with a cathode of the zener diode D9, the zener diode D9 is connected with the zener diode D8 in series, an anode of the zener diode D8 is connected with a base of the triode Q4, a collector of the triode Q4 is connected with a RT pin of the gate driving chip U1 through the resistor R17 and is directly connected with a CT pin of the gate driving chip U1, and an emitter of the triode Q4 is grounded.

9. The power conversion circuit according to claim 1, wherein the output interface J7 is connected to an input interface J9 of the switching power supply circuit, the switching power supply circuit further includes a filter protection circuit, a current limiting circuit, a first voltage reducing circuit and a second voltage reducing circuit, an output terminal of the input interface J9 is connected to the filter protection circuit and the current limiting circuit, the filter protection circuit plays a role in filtering and overvoltage protection, the current limiting circuit plays a role in current limiting, an output terminal of the filter protection circuit and the current limiting circuit is connected to an input terminal of a power supply chip IC2 of the first voltage reducing circuit, the first voltage reducing circuit is used for reducing a voltage to DC16V to be output through a VCC1 pin and providing a working power supply for a working system, an output terminal of the first voltage reducing circuit is connected to the second voltage reducing circuit is used for reducing a voltage to dc3.3v to be output through a VCC2 pin and providing the working power supply for the working system.

10. The power conversion circuit according to claim 9, wherein the filter protection circuit comprises a fuse resistor R25, a fuse resistor R24, a capacitor C11, a capacitor C12 and a super capacitor E12, wherein one output end of the input interface J9 is connected with one end of the fuse resistor R25, the fuse resistor R25 is connected in series with the fuse resistor R24, the other end of the fuse resistor R24 is connected with the capacitor C11, the capacitor C12 and the super capacitor E12 in sequence, the capacitor C11, the capacitor C12 and the super capacitor E12 are connected in parallel, and the other end thereof is grounded; the current limiting circuit comprises a capacitor C16, a resistor R27, a resistor R21 and a resistor R26, wherein the other output end of the input interface J9 is sequentially connected with one ends of the capacitor C16 and the resistor R27, the other ends of the capacitor C16 and the resistor R27 are connected with the resistor R21, the resistor R21 is connected with the resistor R26 in series, and the other end of the resistor R26 is connected with the input end of the power chip IC 2; the power chip IC2 is used for reducing the voltage to DC16V and outputting the voltage through a VCC1 pin after stable pressure filtration, the second step-down circuit comprises a voltage stabilizing circuit, a second step-down chip IC1 and a filter circuit, the output end of the first step-down circuit is connected with the voltage stabilizing circuit, the output end of the voltage stabilizing circuit is connected with the input end of the second step-down chip IC1, the second step-down chip IC1 reduces the voltage to DC3.3V, the output end of the second step-down chip IC1 is connected with the filter circuit, and the filter circuit is used for providing a DC3.3V working power supply for a working system through an output pin VCC2 pin.