Power factor correction high-temperature switching power supply

Abstract

The utility model discloses a power factor correction high-temperature switching power supply, which comprises a main controller module, a voltage conversion module, a voltage signal acquisition module, a current signal acquisition module and an mos tube driving module, and is characterized in that the main controller module is respectively connected with the voltage signal acquisition module, the current signal acquisition module and the mos tube driving module; the voltage conversion module is respectively connected with the current signal acquisition module and the mos tube driving module, the current signal acquisition module acquires a current signal and transmits the current signal to the main controller module, the voltage signal acquisition module acquires a voltage signal and transmits the voltage signal to the main controller module, and the main controller module transmits a PWM control signal to the mos tube driving module. The mos tube driving module controls the voltage conversion module to perform voltage conversion based on the PWM control signal; the PWM control signal is generated through the main controller module based on the voltage signal and the current signal, and a stable voltage range is output.

Description

Technical Field

[0001] The utility model relates to the technical field of power supplies, in particular to a high-temperature switching power supply for power factor correction. Background Art

[0002] In the actual application of oil drilling operations, various downhole instruments and equipment are installed in sealed stainless steel pipes. Inside, there are not only power cables that supply power to the instruments and equipment, but also communication cables for various instruments and equipment to communicate. When these two types of cables are in a confined and narrow space at the same time, a power supply cable that is several kilometers or even tens of thousands of meters long has a greater impact on the communication of the communication cable, which may increase the noise on the communication cable and reduce the communication ability and communication distance of the communication cable. In order not to affect the communication of the communication cable, it is necessary to increase the ground power supply, which will increase the energy loss on the cable, the heat dissipated will also increase, and the cable power consumption will increase significantly. However, conventional PFC (Power Factor Correction) power supplies cannot adapt to harsh working environments such as high temperature and high pressure downhole, and cannot output a stable voltage range. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a high-temperature switching power supply for power factor correction, which realizes generating a PWM control signal by a main controller module based on voltage signals and current signals and outputting a stable voltage range.

[0004] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0005] A high-temperature switching power supply for power factor correction includes a main controller module, a voltage conversion module, a voltage signal acquisition module, a current signal acquisition module, and a MOS tube drive module. The main controller module is respectively connected to the voltage signal acquisition module, the current signal acquisition module, and the MOS tube drive module. The voltage conversion module is respectively connected to the current signal acquisition module and the MOS tube drive module. The current signal acquisition module acquires a current signal and transmits it to the main controller module. The voltage signal acquisition module acquires a voltage signal and transmits it to the main controller module. The main controller module generates a PWM control signal based on the voltage signal and the current signal. The main controller module transmits the PWM control signal to the MOS tube drive module. The MOS tube drive module controls the voltage conversion module to perform voltage conversion based on the PWM control signal and outputs a stable voltage range.

[0006] Further, the main controller module includes a controller U1, a capacitor C5, an inductor L3, capacitors C15, C16, C17, C18, C20, resistors R13, R20, R21, and an interface terminal JZ1. One end of the 84-pin terminal of the controller U1 is connected to one end of the capacitor C5 and one end of the inductor L3. The other end of the capacitor C5 is grounded, and the other end of the inductor L3 is connected to the positive pole of the power supply. One end of the 56-pin terminal of the controller U1 is connected to one end of the capacitor C15 and one end of the capacitor C16. One end of the 55-pin terminal of the controller U1 is connected to one end of the capacitor C17 and one end of the capacitor C18. One end of the 57-pin terminal of the controller U1 is connected to one end of the resistor R13. One end of the 54-pin terminal of the controller U1 is connected to one end of the capacitor C20. One end of the 43-pin terminal of the controller U1 is connected to one end of the resistor R20. The other ends of the capacitor C15, the capacitor C16, the capacitor C17, the capacitor C18, the resistor R13, the capacitor C20, and the resistor R20 are all grounded. One end of the 5-pin terminal of the controller U1 is connected to one end of the resistor R21, and the other end of the resistor R21 is grounded. One end of the 104-pin terminal of the controller U1 is connected to the 3-pin terminal of the interface terminal JZ1. The 4-pin terminal of the interface terminal JZ1 is connected to the positive pole of the power supply, and the 2-pin terminal of the interface terminal JZ1 is grounded.

[0007] Further, the voltage conversion module includes a fuse element F1, a resistor R1, a capacitor C2, a common mode inductor L1, a capacitor C1, a rectifier bridge D1, a capacitor C3, an inductor L2, diodes D2, D3, a resistor R5, a resistor R10, a MOS transistor Q1, capacitors C8, C9. One end of the fuse element F1 is connected to the L pole of the AC power supply. The other end of the fuse element F1 is connected to one end of the resistor R1, one end of the capacitor C2, and the 1-pin terminal of the common mode inductor L1. The other end of the capacitor C2 is connected to the other end of the resistor R1 and the 4-pin terminal of the common mode inductor L1. The 2-pin terminal of the common mode inductor L1 is connected to one end of the capacitor C1 and one of the AC terminals of the rectifier bridge D1. The 3-pin terminal of the common mode inductor L1 is connected to the other end of the capacitor C1 and the other AC terminal of the rectifier bridge D1. The positive terminal of the rectifier bridge D1 is connected to one end of the capacitor C3, one end of the inductor L2, and one end of the diode D2. The other end of the inductor L2 is connected to the drain terminal of the MOS transistor Q1. The other end of the diode D2 is connected to one end of the diode D3. The current signal acquisition module is respectively connected to the other end of the diode D3, one end of the capacitor C8, and one end of the capacitor C9. The negative terminal of the rectifier bridge D1 is connected to one end of the capacitor C3 and one end of the resistor R5. The MOS transistor drive module is respectively connected to the gate terminal of the MOS transistor Q1 and one end of the resistor R10. The other ends of the resistor R5, the source terminal of the MOS transistor Q1, the other end of the resistor R10, the other end of the capacitor C8, and the other end of the capacitor C9 are all grounded.

[0008] Further, the voltage signal acquisition module includes a resistor R7, a resistor R11, a resistor R12, a resistor R14, a capacitor C7, and an operational amplifier U6. One end of the resistor R7 is connected to the positive pole of the power supply, the other end of the resistor R7 is respectively connected to one end of the resistor R11 and one end of the resistor R12, the other end of the resistor R11 is grounded, the other end of the resistor R12 is connected to the positive input terminal of the operational amplifier U6, one end of the resistor R14 is respectively connected to the negative input terminal and the output terminal of the operational amplifier U6, the 5-pin terminal of the operational amplifier U6 is connected to the positive pole of the power supply, the 2-pin terminal of the operational amplifier U6 is grounded, the other end of the resistor R14 is respectively connected to one end of the capacitor C7 and the 40-pin terminal of the controller U1, and the other end of the capacitor C7 is grounded.

[0009] Further, the current signal acquisition module includes a chip U7, a resistor R3, a resistor R6, a resistor R8, a resistor R9, a capacitor C4, and an operational amplifier U5. The 1-pin terminal and the 2-pin terminal of the chip U4 are connected to the voltage conversion module. The 3-pin terminal and the 4-pin terminal of the chip U7 are connected to the positive pole of the power supply. The 8-pin terminal of the chip U7 is connected to the positive pole of the power supply. The 6-pin terminal of the chip U7 is connected to one end of the capacitor C4. The other end of the capacitor C4 and the 5-pin terminal of the chip U7 are grounded. The 7-pin terminal of the chip U7 is connected to one end of the resistor R8. The other end of the resistor R8 is connected to the positive input terminal of the operational amplifier U5. The negative input terminal of the operational amplifier U5 is respectively connected to one end of the resistor R3 and one end of the resistor R6. The other end of the resistor R3 and the 2-pin terminal of the operational amplifier U5 are grounded. The output terminal of the operational amplifier U5 is respectively connected to the other end of the resistor R6 and one end of the resistor R9. The other end of the resistor R9 is connected to the 37-pin terminal of the controller U1.

[0010] Further, the MOS tube driving module includes a chip U3, a resistor R2, a diode D4, and a chip U4. The 5-pin terminal of the chip U3 is respectively connected to one end of the resistor R2 and one end of the diode D4. The voltage conversion module (the gate terminal of the MOS tube Q1 of the voltage conversion module) is respectively connected to the other end of the resistor R2 and the other end of the diode D4. The 6-pin terminal of the chip U3 is connected to the positive pole of the power supply. The 3-pin terminal of the chip U3 is grounded. The 4-pin terminal of the chip U3 is connected to the 18-pin terminal of the chip U4. The 2-pin terminal of the chip U4 is connected to the 25-pin terminal of the controller U1.

[0011] Further, in order to ensure the impact resistance, moisture resistance, and maximum isolation of electromagnetic radiation of the power supply, the power factor correction high-temperature switching power supply is provided with a sealed metal potting housing, and the power factor correction high-temperature switching power supply is installed in the sealed metal potting housing.

[0012] Further, a heat sink structure or / and a heat dissipation silica gel layer are provided in the sealed metal potting housing, which greatly improves the heat dissipation of the power factor correction high-temperature switching power supply.

[0013] The beneficial effects of the present utility model: It realizes generating a PWM control signal by the main controller module based on the voltage signal and the current signal, and outputting a stable voltage range.

[0014] It realizes transmitting the PWM control signal from the main controller module to the MOS tube driving module. The MOS tube driving module controls the voltage conversion module to perform voltage conversion based on the PWM control signal, and outputs a stable voltage range.

[0015] It realizes that the power factor correction high-temperature switching power supply is installed in the sealed metal potting housing, and a heat sink structure or / and a heat dissipation silica gel layer are provided in the sealed metal potting housing, which greatly improves the heat dissipation of the power factor correction high-temperature switching power supply.

[0016] It realizes the optimized design based on the ordinary PFC power supply, improves the performance, enhances the tolerance to high temperature and high pressure, reduces the cable signal noise and cable power loss, and significantly enhances the downhole communication ability. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is the circuit diagram of the main controller module of a power factor correction high-temperature switching power supply of the present utility model;

[0019] Figure 2 It is the circuit diagram of the voltage conversion module of a power factor correction high-temperature switching power supply of the present utility model;

[0020] Figure 3 It is the circuit diagram of the current signal acquisition module of a power factor correction high-temperature switching power supply of the present utility model;

[0021] Figure 4 It is the circuit diagram of the voltage signal acquisition module of a power factor correction high-temperature switching power supply of the present utility model;

[0022] Figure 5 It is the circuit diagram of the MOS tube driving module of a power factor correction high-temperature switching power supply of the present utility model. Detailed Embodiments

[0023] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0024] The following specific examples illustrate the implementation manners of the present disclosure. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without making creative efforts belong to the scope of protection of the present disclosure.

[0025] Embodiment 1:

[0026] A power factor correction high-temperature switching power supply includes a main controller module, a voltage conversion module, a voltage signal acquisition module, a current signal acquisition module, and a MOS transistor drive module. The main controller module is respectively connected to the voltage signal acquisition module, the current signal acquisition module, and the MOS transistor drive module. The voltage conversion module is respectively connected to the current signal acquisition module and the MOS transistor drive module. The current signal acquisition module acquires a current signal and transmits it to the main controller module. The voltage signal acquisition module acquires a voltage signal and transmits it to the main controller module. The main controller module generates a PWM control signal based on the voltage signal and the current signal, and the main controller module transmits the PWM control signal to the MOS transistor drive module. The MOS transistor drive module controls the voltage conversion module to perform voltage conversion based on the PWM control signal and outputs a stable voltage range.

[0027] The main controller module includes controller U1, capacitor C5, inductor L3, capacitor C15, capacitor C16, capacitor C17, capacitor C18, capacitor C20, resistor R13, resistor R20, resistor R21, and interface terminal JZ1. The 84-pin terminal of controller U1 is respectively connected to one end of capacitor C5 and one end of inductor L3. The other end of capacitor C5 is grounded, and the other end of inductor L3 is connected to the positive pole of the power supply. The 56-pin terminal of controller U1 is respectively connected to one end of capacitor C15 and one end of capacitor C16. The 55-pin terminal of controller U1 is respectively connected to one end of capacitor C17 and one end of capacitor C18. The 57-pin terminal of controller U1 is connected to one end of resistor R13. The 54-pin terminal of controller U1 is connected to one end of capacitor C20. The 43-pin terminal of controller U1 is connected to one end of resistor R20. The other ends of capacitor C15, capacitor C16, capacitor C17, capacitor C18, resistor R13, capacitor C20, and resistor R20 are all grounded. The 5-pin terminal of controller U1 is connected to one end of resistor R21, and the other end of resistor R21 is grounded. The 104-pin terminal of controller U1 is connected to the 3-pin terminal of interface terminal JZ1. The 4-pin terminal of interface terminal JZ1 is connected to the positive pole of the power supply, and the 2-pin terminal of interface terminal JZ1 is grounded.

[0028] It should be noted that the main controller module is used to control the MOS transistor to complete the conversion of AC voltage to DC voltage, collect the output voltage from the acquisition module, and achieve regulated output.

[0029] The voltage conversion module includes a fuse element F1, a resistor R1, a capacitor C2, a common-mode inductor L1, a capacitor C1, a rectifier bridge D1, a capacitor C3, an inductor L2, a diode D2, a diode D3, a resistor R5, a resistor R10, a MOS transistor Q1, a capacitor C8, and a capacitor C9. One end of the fuse element F1 is connected to the L pole of the AC power supply. The other end of the fuse element F1 is respectively connected to one end of the resistor R1, one end of the capacitor C2, and the 1-pin end of the common-mode inductor L1. The other end of the capacitor C2 is respectively connected to the other end of the resistor R1 and the 4-pin end of the common-mode inductor L1. The 2-pin end of the common-mode inductor L1 is respectively connected to one end of the capacitor C1 and one of the AC ends of the rectifier bridge D1. The 3-pin end of the common-mode inductor L1 is respectively connected to the other end of the capacitor C1 and the other AC end of the rectifier bridge D1. The positive electrode end of the rectifier bridge D1 is respectively connected to one end of the capacitor C3, one end of the inductor L2, and one end of the diode D2. The other end of the inductor L2 is connected to the drain terminal of the MOS transistor Q1. The other end of the diode D2 is connected to one end of the diode D3. The current signal acquisition module is respectively connected to the other end of the diode D3, one end of the capacitor C8, and one end of the capacitor C9. The negative electrode end of the rectifier bridge D1 is respectively connected to one end of the capacitor C3 and one end of the resistor R5. The MOS transistor drive module is respectively connected to the gate terminal of the MOS transistor Q1 and one end of the resistor R10. The other end of the resistor R5, the source terminal of the MOS transistor Q1, the other end of the resistor R10, the other end of the capacitor C8, and the other end of the capacitor C9 are all grounded.

[0030] It should be noted that the voltage conversion module is used to drive the voltage conversion module through MOS to complete the conversion of the main voltage and form a closed-loop feedback system.

[0031] The voltage signal acquisition module includes a resistor R7, a resistor R11, a resistor R12, a resistor R14, a capacitor C7, and an operational amplifier U6. One end of the resistor R7 is connected to the positive pole of the power supply. The other end of the resistor R7 is respectively connected to one end of the resistor R11 and one end of the resistor R12. The other end of the resistor R11 is grounded. The other end of the resistor R12 is connected to the positive input terminal of the operational amplifier U6. One end of the resistor R14 is respectively connected to the negative input terminal of the operational amplifier U6 and the output terminal of the operational amplifier U6. The 5-pin end of the operational amplifier U6 is connected to the positive pole of the power supply. The 2-pin end of the operational amplifier U6 is grounded. The other end of the resistor R14 is respectively connected to one end of the capacitor C7 and the 40-pin end of the controller U1. The other end of the capacitor C7 is grounded.

[0032] It should be noted that the voltage acquisition module is used for the main controller to collect the output voltage from the voltage feedback module and adjust the duty cycle of the drive signal according to the collected voltage.

[0033] The current signal acquisition module includes chip U7, resistors R3, R6, R8, R9, capacitor C4, and operational amplifier U5. The 1-pin end and the 2-pin end of chip U4 are connected to the voltage conversion module. The 3-pin end and the 4-pin end of chip U7 are connected to the positive pole of the power supply. The 8-pin end of chip U7 is connected to the positive pole of the power supply. The 6-pin end of chip U7 is connected to one end of capacitor C4. The other end of capacitor C4 and the 5-pin end of chip U7 are grounded. The 7-pin end of chip U7 is connected to one end of resistor R8. The other end of resistor R8 is connected to the positive input terminal of operational amplifier U5. The negative input terminal of operational amplifier U5 is respectively connected to one end of resistor R3 and one end of resistor R6. The other end of resistor R3 and the 2-pin end of operational amplifier U5 are grounded. The output terminal of operational amplifier U5 is respectively connected to the other end of resistor R6 and one end of resistor R9. The other end of resistor R9 is connected to the 37-pin end of controller U1.

[0034] The MOS transistor driving module includes chip U3, resistor R2, diode D4, and chip U4. The 5-pin end of chip U3 is respectively connected to one end of resistor R2 and one end of diode D4. The voltage conversion module (the gate terminal of MOS transistor Q1 in the voltage conversion module) is respectively connected to the other end of resistor R2 and the other end of diode D4. The 6-pin end of chip U3 is connected to the positive pole of the power supply. The 3-pin end of chip U3 is grounded. The 4-pin end of chip U3 is connected to the 18-pin end of chip U4. The 2-pin end of chip U4 is connected to the 25-pin end of controller U1.

[0035] For example, the MOS transistor driving module can be used to convert the 3.3V control signal of the main control module into a 12V control signal.

[0036] To ensure the shock resistance, moisture resistance, and maximum isolation of electromagnetic radiation of the power supply, the power factor correction high-temperature switching power supply is provided with a sealed metal potting housing, and the power factor correction high-temperature switching power supply is installed in the sealed metal potting housing. Further, a heat sink structure or / and a heat dissipation silicone layer is provided on the sealed metal potting housing, which greatly improves the heat dissipation of the power factor correction high-temperature switching power supply. The power factor correction high-temperature switching power supply adopts the process of sealed metal potting and a unique heat dissipation technology (heat sink and self-adjusting ratio heat dissipation silicone), ensuring the shock resistance and moisture resistance of the power supply and maximizing the isolation of electromagnetic radiation.

[0037] When in use, the main controller outputs a PWM signal with adjustable duty cycle, which then passes through the MOS tube drive circuit and is converted into a 12V signal that can directly control the MOS tube, driving the voltage conversion circuit to achieve the conversion from AC signal to DC signal. The main control module adjusts the duty cycle of the PWM signal according to the collected DC voltage value by collecting the output DC voltage, so as to achieve regulated output. Using a PFC high-temperature power supply underground can effectively reduce the ground power supply, reduce the current, thereby reducing the cable type noise and improving the communication ability. The PFC high-temperature power supply can operate stably and continuously for 4000 hours at a case temperature of 150°C, 1500 hours at a case temperature of 175°C, and 700 hours at a case temperature of 185°C.

[0038] The terms "first", "second", "third", etc. in the description of this application and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0039] As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A power factor correction high-temperature switching power supply, characterized in that, It includes a main controller module, a voltage conversion module, a voltage signal acquisition module, a current signal acquisition module, and a MOS transistor driving module. The main controller module is respectively connected to the voltage signal acquisition module, the current signal acquisition module, and the MOS transistor driving module. The voltage conversion module is respectively connected to the current signal acquisition module and the MOS transistor driving module. The current signal acquisition module acquires the current signal and transmits it to the main controller module. The voltage signal acquisition module acquires the voltage signal and transmits it to the main controller module. The main controller module generates a PWM control signal based on the voltage signal and the current signal. The main controller module transmits the PWM control signal to the MOS transistor driving module. The MOS transistor driving module controls the voltage conversion module to perform voltage conversion based on the PWM control signal and outputs a stable voltage range.

2. The power factor correction high-temperature switching power supply according to claim 1, wherein The main controller module includes a controller U1, a capacitor C5, an inductor L3, a capacitor C15, a capacitor C16, a capacitor C17, a capacitor C18, a capacitor C20, a resistor R13, a resistor R20, a resistor R21, and an interface terminal JZ1. One end of the 84-pin terminal of the controller U1 is respectively connected to one end of the capacitor C5 and one end of the inductor L3. The other end of the capacitor C5 is grounded. The other end of the inductor L3 is connected to the positive pole of the power supply. One end of the 56-pin terminal of the controller U1 is respectively connected to one end of the capacitor C15 and one end of the capacitor C16. One end of the 55-pin terminal of the controller U1 is respectively connected to one end of the capacitor C17 and one end of the capacitor C18. One end of the 57-pin terminal of the controller U1 is connected to one end of the resistor R13. One end of the 54-pin terminal of the controller U1 is connected to one end of the capacitor C20. One end of the 43-pin terminal of the controller U1 is connected to one end of the resistor R20. The other ends of the capacitor C15, the capacitor C16, the capacitor C17, the capacitor C18, the resistor R13, the capacitor C20, and the resistor R20 are all grounded. One end of the 5-pin terminal of the controller U1 is connected to one end of the resistor R21. The other end of the resistor R21 is grounded. One end of the 104-pin terminal of the controller U1 is connected to the 3-pin terminal of the interface terminal JZ1. The 4-pin terminal of the interface terminal JZ1 is connected to the positive pole of the power supply. The 2-pin terminal of the interface terminal JZ1 is grounded.

3. The power factor correction high-temperature switching power supply according to claim 1, wherein, The voltage conversion module includes a fuse element F1, a resistor R1, a capacitor C2, a common mode inductor L1, a capacitor C1, a rectifier bridge D1, a capacitor C3, an inductor L2, a diode D2, a diode D3, a resistor R5, a resistor R10, a MOS transistor Q1, a capacitor C8, and a capacitor C9. One end of the fuse element F1 is connected to the L pole of the AC power supply. The other end of the fuse element F1 is respectively connected to one end of the resistor R1, one end of the capacitor C2, and the 1-pin end of the common mode inductor L1. The other end of the capacitor C2 is respectively connected to the other end of the resistor R1 and the 4-pin end of the common mode inductor L1. The 2-pin end of the common mode inductor L1 is respectively connected to one end of the capacitor C1 and one of the AC ends of the rectifier bridge D1. The 3-pin end of the common mode inductor L1 is respectively connected to the other end of the capacitor C1 and the other AC end of the rectifier bridge D1. The positive extreme of the rectifier bridge D1 is respectively connected to one end of the capacitor C3, one end of the inductor L2, and one end of the diode D2. The other end of the inductor L2 is connected to the drain extreme of the MOS transistor Q1. The other end of the diode D2 is connected to one end of the diode D3. The current signal acquisition module is respectively connected to the other end of the diode D3, one end of the capacitor C8, and one end of the capacitor C9. The negative extreme of the rectifier bridge D1 is respectively connected to one end of the capacitor C3 and one end of the resistor R5. The MOS transistor drive module is respectively connected to the gate extreme of the MOS transistor Q1 and one end of the resistor R10. The other end of the resistor R5, the source extreme of the MOS transistor Q1, the other end of the resistor R10, the other end of the capacitor C8, and the other end of the capacitor C9 are all grounded.

4. The power factor correction high-temperature switching power supply according to claim 1, characterized in that The voltage signal acquisition module includes a resistor R7, a resistor R11, a resistor R12, a resistor R14, a capacitor C7, and an operational amplifier U6. One end of the resistor R7 is connected to the positive pole of the power supply. The other end of the resistor R7 is respectively connected to one end of the resistor R11 and one end of the resistor R12. The other end of the resistor R11 is grounded. The other end of the resistor R12 is connected to the positive input terminal of the operational amplifier U6. One end of the resistor R14 is respectively connected to the negative input terminal of the operational amplifier U6 and the output terminal of the operational amplifier U6. The 5-pin end of the operational amplifier U6 is connected to the positive pole of the power supply. The 2-pin end of the operational amplifier U6 is grounded. The other end of the resistor R14 is respectively connected to one end of the capacitor C7 and the 40-pin end of the controller U1. The other end of the capacitor C7 is grounded.

5. The power factor correction high-temperature switching power supply according to claim 1, wherein The current signal acquisition module includes chip U7, resistor R3, resistor R6, resistor R8, resistor R9, capacitor C4 and operational amplifier U5. The 1-pin end and 2-pin end of chip U4 are connected to the voltage conversion module. The 3-pin end and 4-pin end of chip U7 are connected to the positive pole of the power supply. The 8-pin end of chip U7 is connected to the positive pole of the power supply. The 6-pin end of chip U7 is connected to one end of capacitor C4. The other end of capacitor C4 and the 5-pin end of chip U7 are grounded. The 7-pin end of chip U7 is connected to one end of resistor R8. The other end of resistor R8 is connected to the positive input terminal of operational amplifier U5. The negative input terminal of operational amplifier U5 is respectively connected to one end of resistor R3 and one end of resistor R6. The other end of resistor R3 and the 2-pin end of operational amplifier U5 are grounded. The output terminal of operational amplifier U5 is respectively connected to the other end of resistor R6 and one end of resistor R9. The other end of resistor R9 is connected to the 37-pin end of controller U1.

6. The power factor correction high-temperature switching power supply according to claim 1, wherein The MOS transistor drive module includes chip U3, resistor R2, diode D4, chip U4. The 5-pin end of chip U3 is respectively connected to one end of resistor R2 and one end of diode D4. The voltage conversion module is respectively connected to the other end of resistor R2 and the other end of diode D4. The 6-pin end of chip U3 is connected to the positive pole of the power supply. The 3-pin end of chip U3 is grounded. The 4-pin end of chip U3 is connected to the 18-pin end of chip U4. The 2-pin end of chip U4 is connected to the 25-pin end of controller U1.

7. The power factor correction high-temperature switching power supply according to any one of claims 1-6, characterized in that, The power factor correction high-temperature switching power supply is provided with a sealed metal potting housing, and the power factor correction high-temperature switching power supply is installed in the sealed metal potting housing.

8. The power factor correction high-temperature switching power supply according to claim 7, characterized in that, It also includes a heat sink structure or / and a heat dissipation silicone layer provided on the sealed metal potting housing.

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