An instantaneous power switching power supply

Abstract

The present invention discloses an instantaneous power switching power supply, and relates to the technical field of power supply. The present invention samples the current of the output direct current output by the output synchronous rectification module, and regulates the resonant half-bridge voltage conversion module according to the current of the output direct current, so as to perform current limiting delay protection on the instantaneous power switching power supply, so that the output of the instantaneous power switching power supply can carry a larger capacitive load and instantaneous power; the present invention adds a current limiting delay module to the instantaneous power switching power supply, thereby avoiding the problem in the prior art that the power supply cannot carry a larger capacitive load or instantaneous power due to the increase in power supply volume or the use of a digital power supply for delay current limiting, and can be applied to loads that require transient high power, thereby improving the applicability of the instantaneous power switching power supply.

Description

Technical Field

[0001] The invention belongs to the technical field of power supply, and in particular relates to an instantaneous power switch power supply. Background Art

[0002] With the continuous development of power equipment, power supply plays a great role as a voltage conversion device for power grid and load. Power supply converts AC power from the mains into DC power required by load. As more and more loads requiring instantaneous high power are connected to the power grid, the requirements for power supply are also increasing. Instantaneous high power load refers to the phenomenon that the peak power of the load will rise instantaneously when it is started or switched. At this time, the load power consumption will be much greater than its rated power and the duration is short.

[0003] In order to be able to carry instantaneous high-power loads, the current method usually involves increasing the size of the power supply or using a digital power supply to increase the delay and current limiting function. However, whether increasing the size of the power supply or using a digital power supply is costly, and the circuit structure of the digital power supply is more complex, and it is also necessary to develop corresponding control software to participate in power supply regulation, which results in the current power supply being unable to carry larger capacitive loads or instantaneous power. In addition, the current power supply output rectification mostly uses diodes for rectification, which has large losses and low efficiency, while synchronous rectification mostly uses synchronous rectification chips, which have high costs. These have further limited the application and development of power supplies that can carry instantaneous high-power loads. Therefore, there is an urgent need for an instantaneous power switching power supply to solve the defects of the prior art. Summary of the invention

[0004] The present invention aims to provide an instantaneous power switching power supply to solve the above technical problems. The output DC power of the output synchronous rectification module is collected by a current limiting delay module and the resonant half-bridge voltage conversion module is regulated, thereby improving the instantaneous power and capacitive load that the instantaneous power switching power supply can carry.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides an instantaneous power switch power supply, including: an input rectification and filtering module, a boost module, a resonant half-bridge voltage conversion module, an output synchronous rectification module and a current limiting delay module;

[0006] Wherein, the input end of the input rectification and filtering module serves as the input end of the instantaneous power switch power supply; the output end of the output synchronous rectification module serves as the output end of the instantaneous power switch power supply;

[0007] The input rectifying and filtering module is used to rectify the mains power input to the instantaneous power switch power supply into direct current; the boosting module is used to boost the direct current into a first direct current; the resonant half-bridge voltage conversion module is used to convert the first direct current into a second direct current; the output synchronous rectifying module is used to synchronously rectify the second direct current into an output direct current;

[0008] The current limiting delay module is used to sample the current of the output direct current, and regulate the resonant half-bridge voltage conversion module according to the current of the output direct current, so as to perform current limiting delay protection on the instantaneous power switch power supply.

[0009] It can be understood that, compared with the prior art, the present invention samples the current of the output direct current output by the output synchronous rectification module, and regulates the resonant half-bridge voltage conversion module according to the current of the output direct current, so as to perform current limiting and delay protection on the instantaneous power switching power supply, thereby enabling the output of the instantaneous power switching power supply to carry a larger capacitive load and instantaneous power; the present invention adds a current limiting and delay module to the instantaneous power switching power supply, thereby avoiding the problem in the prior art that the power supply cannot carry a larger capacitive load or instantaneous power due to increasing the power supply volume or using a digital power supply for delay and current limiting, and can be applied to loads that require transient high power, thereby improving the applicability of the instantaneous power switching power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 : A schematic diagram of the structure of an instantaneous power switch power supply provided by an embodiment of the present invention;

[0011] Figure 2 : A structural schematic diagram of a current limiting delay module provided by an embodiment of the present invention;

[0012] Figure 3 : A structural diagram of an output synchronous rectification module provided by an embodiment of the present invention;

[0013] Figure 4 : A schematic diagram of the structure of an input rectifier and filter module provided in an embodiment of the present invention;

[0014] Figure 5 : A schematic structural diagram of a boost module provided in an embodiment of the present invention;

[0015] Figure 6 : A schematic structural diagram of a resonant half-bridge feedback module provided in an embodiment of the present invention;

[0016] Figure 7 : A structural schematic diagram of a resonant half-bridge voltage conversion module provided by an embodiment of the present invention;

[0017] Figure 8 : A structural schematic diagram of an auxiliary power supply module provided in an embodiment of the present invention;

[0018] Wherein, R1: the first resistor; R2: the second resistor; R138: the 138th resistor; R140: the 140th resistor; R143: the 143rd resistor; R139: the 139th resistor; R141: the 141st resistor; R142: the 142nd resistor; R137: the 137th resistor; R136: the 136th resistor; C3: the third capacitor; C4: the fourth capacitor; C2: the second capacitor; C116: the 116th capacitor; C119: the 119th capacitor; C120: the 120th capacitor; C117: the 117th capacitor; D105: the 105th diode; U102A: the first operational amplifier; U102B: the second operational amplifier OP101: 101st optocoupler; Q105: 105th transistor; Q101: 101st transistor; Q102: 102nd transistor; R107: 107th resistor; R100: 100th resistor; C100: 100th capacitor; R101: 101st resistor; R103: 103rd resistor; Q100: 100th transistor; Q103: 103rd transistor; R104: 104th resistor; Q107: 107th transistor; Q108: 108th transistor; Q110: 113th transistor; R116: 116th resistor; C112: 112th capacitor; R119: 119th resistor; R123: The 123rd resistor; Q109: the 109th transistor; Q111: the 111th transistor; R126: the 126th resistor; R118: the 118th resistor; C103: the 103rd capacitor; C102: the 102nd capacitor; L10: the 101st inductor; C101: the 101st capacitor; R102: the 102nd resistor; R127: the 127th resistor; R115: the 115th resistor; F1: the first fuse; RV1: the first varistor RV1; X1: the first X capacitor; CY1: the first Y capacitor; CY2: the second Y capacitor; L2: the second inductor; X2: the second X capacitor; CY5: the fifth Y capacitor; CY6: the sixth Y capacitor; L3: the third capacitor inductor; X3: third X capacitor; CY7: seventh Y capacitor; CY8: eighth Y capacitor; DB1: rectifier bridge; PE1: first ground conductor; PE2: second ground conductor; PE3: third ground conductor; RT2: second thermistor; D1: first diode; L1: first inductor; R4: fourth resistor; C5: fifth capacitor; R8: eighth resistor; R6: sixth resistor; R7: seventh resistor; D3: third diode; R9: ninth resistor; Q1: first transistor; D2: second diode; C1: first capacitor; R5: fifth resistor; R10: tenth resistor; R15: fifteenth resistor; R13: thirteenth resistor; R16: sixteenth resistor; R18: eighteenth resistor; C14: fourteenth capacitor;R21: 21st resistor; R22: 22nd resistor; C15: 15th capacitor; C17: 17th capacitor; C16: 16th capacitor; R20: 20th resistor; R23: 23rd resistor; C11: 11th capacitor; C12: 12th capacitor; U1: first control chip U1; C109: 109th capacitor; OP100: 100th photocoupler; R121: 121st resistor; R122: 122nd resistor; R133: 133rd resistor; R128: 128th resistor; C111: 111th capacitor; R124: 124th resistor; U101: 101st voltage regulator diode U101; R105: 105th resistor Resistance; R110: 110th resistor; R112: 112th resistor; R117: 117th resistor; C104: 104th capacitor; R106: 106th resistor; R108: 108th resistor; D100: 100th diode; R109: 109th resistor; Q104: 104th transistor; R111: 111th resistor; R113: 113th resistor; D101: 101st diode; R114: 114th resistor; Q106: 106th transistor; L100: 100th inductor; T100: 100th transformer; C118: 118th capacitor; R120: 120th resistor; C106: 100th transistor 06 capacitor; C107: 107 capacitor; C108: 108 capacitor; R130: 130 resistor; R131: 131 resistor; R129: 129 resistor; R132: 132 resistor; R134: 134 resistor; C114: 114 capacitor; U100: 100 control chip; C105: 105 capacitor; D102: 102 diode; C110: 110 capacitor; R135: 135 resistor; C115: 115 capacitor; D103: 103 diode; D104: 104 diode; C113: 113 capacitor; R125: 125 capacitor Resistance; C19: 19th capacitor; R33: 33rd resistor; R36: 36th resistor; R41: 41st resistor; C42: 42nd capacitor; R49: 49th resistor; C43: 43rd capacitor; C27: 27th capacitor; R31: 31st resistor; D7: 7th diode; D22: 22nd diode; C55: 55th capacitor; D10: 10th diode; R56: 56th resistor; C40: 40th capacitor; R52: 52nd resistor; R61: 61st resistor; R64: 64th resistor; C39: 39th capacitor; R62: 62nd resistor; R63: 63rd resistor; Q2: 2nd transistor; D11: 11th diode;C31: the 31st capacitor; R58: the 58th resistor; R29: the 29th resistor; OP3: the 3rd photocoupler; R60: the 60th resistor; R65: the 65th resistor; R70: the 70th resistor; C37: the 37th capacitor; R48: the 48th resistor; R55: the 55th resistor; C26: the 26th capacitor; T1: the first transformer; U5: the fifth voltage stabilizing diode; U3: the third control chip; 101: the input rectifier filter module; 102: the boost module; 103: the resonant half-bridge voltage conversion module; 104: the output synchronous rectifier module; 105: the current limiting delay module; 106: the auxiliary power supply module; 107: the resonant half-bridge feedback module. ; DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1

[0021] Please refer to Figure 1 , is a schematic diagram of the structure of an instantaneous power switch power supply provided by an embodiment of the present invention, comprising an input rectification and filtering module 101, a boost module 102, a resonant half-bridge voltage conversion module 103, an output synchronous rectification module 104 and a current limiting delay module 105;

[0022] The input end of the input rectifying and filtering module 101 is used as the input end of the instantaneous power switching power supply; the output end of the output synchronous rectifying module 104 is used as the output end of the instantaneous power switching power supply;

[0023] The input rectifying and filtering module 101 is used to rectify the AC power input to the instantaneous power switch power supply into DC power; the boosting module 102 is used to boost the DC power into a first DC power; the resonant half-bridge voltage conversion module 103 is used to convert the first DC power into a second DC power; the output synchronous rectifying module 104 is used to synchronously rectify the second DC power into an output DC power;

[0024] The current limiting delay module 105 is used to sample the current of the output DC power, and regulate the resonant half-bridge voltage conversion module 103 according to the current of the output DC power, so as to perform current limiting delay protection on the instantaneous power switch power supply.

[0025] like Figure 1As shown, in this embodiment, the instantaneous power switch power supply further includes an auxiliary power supply module 106,

[0026] The input end of the auxiliary power supply module 106 is electrically connected to the output end of the boost module 102;

[0027] The output end of the auxiliary power supply module 106 is electrically connected to the power supply input end of the output synchronous rectification module 104;

[0028] The output end of the auxiliary power supply module 106 is electrically connected to the power supply input end of the current limiting delay module 105 .

[0029] like Figure 2 , which is a schematic diagram of the structure of a current limiting delay module provided by an embodiment of the present invention. In this embodiment, the current limiting delay module includes: a first resistor R1, a second resistor R2, a one-hundred-and-thirty-eighth resistor R138, a one-hundred-and-forty resistor R140, a one-hundred-and-forty-third resistor R143, a one-hundred-and-ninth resistor R139, a one-hundred-and-forty-first resistor R141, a one-hundred-and-forty-second resistor R142, a one-hundred-and-seventh resistor R137, a one-hundred-and-sixth resistor R136, a third capacitor C3, a fourth capacitor C4, a second capacitor C2, a one-hundred-and-sixteenth capacitor C116, a one-hundred-and-nineteenth capacitor C119, a one-hundred-and-twenty capacitor C120, a one-hundred-and-seventeenth capacitor C117, a one-hundred-and-fifth diode D105, a first operational amplifier U102A, a second operational amplifier U102B and a one-hundred-and-first photoelectric coupler OP101;

[0030] Among them, the first end of the second resistor R2 is electrically connected to the third end of the first operational amplifier U102A; the second end of the third capacitor C3 is electrically connected to the second end of the second resistor R2; the first end of the third capacitor C3 is electrically connected to the first end of the second resistor R2; the second end of the first 138th resistor R138 is electrically connected to the first end of the second resistor R2; the second end of the first resistor R1 is electrically connected to the first end of the first 140th resistor R140; the first end of the first 140th resistor R140 is electrically connected to the first end of the fourth capacitor C4; the first end of the fourth capacitor C4 is electrically connected to the second end of the first operational amplifier U102A The second end of the fourth capacitor C4 and the second end of the first one hundred and forty resistor R140 are both grounded; the second end of the second capacitor C2 is electrically connected to the third end of the first operational amplifier U102A; the first end of the second capacitor C2 is electrically connected to the second end of the first one hundred and forty-three resistor R143; the first end of the first one hundred and forty-three resistor R143 is electrically connected to the first end of the first operational amplifier U102A; the second end of the first one hundred and sixteen capacitor C116 is electrically connected to the power supply terminal of the first operational amplifier U102A; the first end of the first one hundred and sixteen capacitor C116 is grounded; the fourth end of the first operational amplifier U102A is grounded;

[0031] The second end of the first one hundred and thirty-ninth resistor R139 is electrically connected to the first end of the first operational amplifier U102A; the first end of the first one hundred and thirty-ninth resistor R139 is electrically connected to the first end of the first one hundred and nineteenth capacitor C119; the first end of the first one hundred and thirty-ninth resistor R139 is electrically connected to the first end of the first one hundred and forty-first resistor R141; the second end of the first one hundred and nineteenth capacitor C119 and the second end of the first one hundred and forty-first resistor R141 are both grounded;

[0032] The sixth end of the second operational amplifier U102B is electrically connected to the first end of the first 139th resistor R139; the second end of the first 117th capacitor C117 is electrically connected to the sixth end of the second operational amplifier U102B; the first end of the first 117th capacitor C117 is electrically connected to the seventh end of the second operational amplifier U102B; the second end of the first 137th resistor R137 is electrically connected to the first end of the first 142nd resistor R142; the first end of the first 142nd resistor R142 is electrically connected to the first end of the first 120th capacitor C120; the first 120th capacitor C120 is electrically connected to the first 120th capacitor C120 The second end of the first one hundred and forty-second resistor R142 is electrically connected to ground; the first end of the first one hundred and twenty capacitor C120 is electrically connected to the fifth end of the second operational amplifier U102B; the cathode of the first one hundred and five diode D105 is electrically connected to the seventh end of the second operational amplifier U102B; the anode of the first one hundred and five diode D105 is electrically connected to the second end of the first one hundred and first photocoupler OP101; the first end of the first one hundred and first photocoupler OP101 is electrically connected to the second end of the first one hundred and thirty-six resistor R136; the third end of the first one hundred and first photocoupler OP101 is grounded;

[0033] The second end of the second resistor R2 is electrically connected to the output end of the output synchronous rectification module, and is used to sample the current of the output direct current output by the output synchronous rectification module;

[0034] The fourth terminal of the 101st photoelectric coupler OP101 is electrically connected to the control terminal of the resonant half-bridge voltage conversion module;

[0035] The first end of the first resistor R1, the first end of the first-hundred-and-thirty-eighth resistor R138, the second end of the first-hundred-and-sixteenth capacitor C116, the first end of the first-hundred-and-thirty-seventh resistor R137 and the first end of the first-hundred-and-thirty-sixth resistor R136 all serve as power supply input ends of the current limiting delay module.

[0036] In the above embodiment, the working principle of the current limiting delay module is: by collecting the current of the 115th resistor R115 (i.e., the output end of the output synchronous rectification module, which will be explained later), when the IU increases, the voltage of IS increases, and at the same time, the voltage of the third end of the first operational amplifier U102A increases. When it exceeds the voltage of the second end of the first operational amplifier U102A, the voltage of the first end of the first operational amplifier U102A changes from a low level to a high level, and charges the 119th capacitor C119 through the 139th resistor R139. When the voltage is charged to exceed the voltage of the fifth end of the second operational amplifier U102B, the voltage of the seventh end of the second operational amplifier U102B changes from a high level to a low level, the 101st optocoupler OP101 is turned on, and the voltage of Line is pulled down, so that the 100th control chip U100 (i.e., the resonant half-bridge voltage conversion module, which will be mentioned later) stops working, which plays a role in delayed current limiting protection, wherein the delay time of the current limiting can also be set by setting the charging time.

[0037] This embodiment samples the current of the output direct current output by the output synchronous rectification module through the current limiting delay module, thereby realizing the function of delayed current limiting protection, so that the instantaneous power switching power supply can carry impact loads, and can also protect the instantaneous power switching power supply when the high-power load works for a long time, ensuring that the instantaneous power switching power supply can carry a larger capacitive load and instantaneous power.

[0038] In this embodiment, if Figure 3 , which is a schematic diagram of the structure of an output synchronous rectification module provided by the present embodiment, the output synchronous rectification module includes: a 105th transistor Q105, a 101st transistor Q101, a 102nd transistor Q102, a 107th resistor R107, a 100th resistor R100, a 100th capacitor C100, a 101st resistor R101, a 103rd resistor R103, a 100th transistor Q100, a 103rd transistor Q103, a 104th resistor R104, a 107th transistor Q107, a 108th transistor Q108, and a 109th transistor Q109. The one hundred and thirteenth transistor Q110, the one hundred and sixteenth resistor R116, the one hundred and twelfth capacitor C112, the one hundred and nineteenth resistor R119, the one hundred and twenty-third resistor R123, the one hundred and ninth transistor Q109, the one hundred and eleventh transistor Q111, the one hundred and twenty-sixth resistor R126, the one hundred and eighteenth resistor R118, the one hundred and third capacitor C103, the one hundred and second capacitor C102, the tenth inductor L10, the one hundred and first capacitor C101, the one hundred and second resistor R102, the one hundred and twenty-seventh resistor R127 and the one hundred and fifteenth resistor R115;

[0039] The first end of the 104th resistor R104 is electrically connected to the second end of the 103rd transistor Q103; the first end of the 103rd transistor Q103 is electrically connected to the first end of the 100th transistor Q100; the third end of the 103rd transistor Q103 is electrically connected to the second end of the 102nd resistor R102; the third end of the 100th transistor Q100 is electrically connected to the second end of the 101st resistor R101; the second end of the 100th transistor Q100 is electrically connected to the first end of the 101st transistor R101; The second end of the ninth transistor Q109 is electrically connected; the second end of the first hundredth transistor Q100 is electrically connected to the third end of the first hundred and fifth transistor Q105; the first end of the first hundred and third resistor R103 is electrically connected to the second end of the first hundred and first resistor R101; the second end of the first hundred and third resistor R103 is electrically connected to the third end of the first hundred and fifth transistor Q105; the third end of the first hundred and second transistor Q102 is electrically connected to the third end of the first hundred and fifth transistor Q105; the first hundred and second transistor Q103 is electrically connected to the third end of the first hundred and third transistor Q105; The first end of the transistor Q102 is electrically connected to the second end of the first one hundred and first resistor R101; the second end of the first one hundred and second transistor Q102 is electrically connected to the second end of the first one hundred and first transistor Q101; the first end of the first one hundred and first transistor Q101 is electrically connected to the first end of the first one hundred and second transistor Q102; the second end of the first one hundred and first transistor Q101 is electrically connected to the first end of the first one hundred and fifth transistor Q105; the second end of the first one hundred and fifth transistor Q105 is electrically connected to the first one hundred and fourth resistor R106. The second end of R104 is electrically connected; the first end of the first one hundred resistor R107 is electrically connected to the second end of the first one hundred transistor Q102; the second end of the first one hundred resistor R107 is electrically connected to the third end of the first one hundred transistor Q105; the second end of the first one hundred capacitor C100 is grounded; the first end of the first one hundred capacitor C100 is electrically connected to the third end of the first one hundred transistor Q101; the second end of the first one hundred resistor R100 is electrically connected to the first end of the first one hundred capacitor C100;

[0040] The first end of the first 118th resistor R118 is electrically connected to the second end of the first 111th transistor Q111; the third end of the first 111th transistor Q111 is electrically connected to the first end of the first 126th resistor R126; the first end of the first 111th transistor Q111 is electrically connected to the first end of the first 109th transistor Q109; the third end of the first 109th transistor Q109 is electrically connected to the first end of the first 123rd resistor R123; the first 119th resistor R11 The second end of the first one hundred and twenty-third resistor R123 is electrically connected to the first end of the first one hundred and twenty-third resistor R123; the first end of the first one hundred and nine resistor R119 is electrically connected to the third end of the first one hundred and seven transistor Q107; the second end of the first one hundred and nine transistor Q109 is electrically connected to the third end of the first one hundred and seven transistor Q107; the third end of the first one hundred and thirteen transistor Q110 is electrically connected to the third end of the first one hundred and seven transistor Q107; the second end of the first one hundred and thirteen transistor Q110 is electrically connected to the third end of the first one hundred and seven transistor Q107; The first end of the first 113th transistor Q110 is electrically connected to the first end of the first 108th transistor Q108; the first end of the first 108th transistor Q108 is electrically connected to the third end of the first 109th transistor Q109; the second end of the first 108th transistor Q108 is electrically connected to the first end of the first 107th transistor Q107; the third end of the first 108th transistor Q108 is electrically connected to the first end of the first 127th resistor R127; the first The first end of the 112th capacitor C112 is electrically connected to the first end of the 127th resistor R127; the second end of the 112th capacitor C112 is grounded; the second end of the 116th resistor R116 is electrically connected to the second end of the 108th transistor Q108; the first end of the 116th resistor R116 is electrically connected to the third end of the 107th transistor Q107; the second end of the 107th transistor Q107 is electrically connected to the second end of the 118th resistor R118;

[0041] The first end of the first-hundred-and-third capacitor C103 is electrically connected to the first end of the tenth inductor L10; the first end of the first-hundred-and-second capacitor C102 is electrically connected to the first end of the tenth inductor L10; the second end of the first-hundred-and-third capacitor C103 and the second end of the first-hundred-and-second capacitor C102 are both grounded; the first end of the first-hundred-and-first capacitor C101 is electrically connected to the second end of the tenth inductor L10; the second end of the first-hundred-and-first capacitor C101 is electrically connected to the second end of the first-hundred-and-fifteenth resistor R115; the first end of the first-hundred-and-fifteenth resistor R115 is grounded;

[0042] The first end of the tenth inductor L10 is electrically connected to the output end of the resonant half-bridge voltage conversion module; the second end of the first one hundred and four resistors R104 is electrically connected to the output end of the resonant half-bridge voltage conversion module; the second end of the first one hundred and eighteen resistors R118 is electrically connected to the output end of the resonant half-bridge voltage conversion module;

[0043] The first end of the first one hundred and second resistor R102, the first end of the first one hundred and first resistor R101, the first end of the first one hundred resistor R100, the second end of the first one hundred and twenty-sixth resistor R126, the second end of the first one hundred and twenty-third resistor R123, and the second end of the first one hundred and twenty-seventh resistor R127 all serve as the power supply input end of the output synchronous rectification module;

[0044] The second end of the tenth inductor L10 and the second end of the first one hundred and fifteenth resistor R115 both serve as output ends of the output synchronous rectification module.

[0045] It should be noted that the working principle of the output synchronous rectification module of the present embodiment is specifically as follows: when DSA is at a low level, the current flows from GND to DSA through the body diode of the one hundred and fifth transistor Q105, the one hundred and third transistor Q103 is in a conducting state, and its third terminal is at a low level, the B level of the one hundred transistor Q100 is at a low level, and its third terminal is at a high level, that is, the B level of the totem pole circuit constructed by the one hundred and first transistor Q101 and the one hundred and second transistor Q102 is at a high level, at this time, the one hundred and first transistor Q101 is turned on, and the one hundred and fifth transistor Q105 is turned on. The G-level voltage is high, and the one hundred and fifth transistor Q105 is turned on; when DSA is high, the one hundred and third transistor Q103 is turned off, and its third terminal is high, the one hundred transistor Q100 is turned on, and the B-level voltages of the one hundred and first transistor Q101 and the one hundred and second transistor Q102 are pulled down to a low level. At this time, the one hundred and first transistor Q101 is turned off, the one hundred and second transistor Q102 is turned on, and the G-level of the one hundred and fifth transistor Q105 is discharged through the one hundred and second transistor Q102, which is a low level. At this time, the one hundred and fifth transistor Q105 is turned off;

[0046] Among them, this embodiment only describes the working principle of the DSA part. The circuit structure of the DSB part is symmetrical and similar to the circuit structure of the upper part. Therefore, the working principle of the DSB part can be obtained by referring to the working principle of the DSA part, and no further details will be given here.

[0047] This embodiment improves the overall efficiency of the instantaneous power switch power supply by outputting a synchronous rectification module, and further reduces the cost compared to using a synchronous rectification chip.

[0048] In this embodiment, please refer to Figure 4, is a schematic diagram of the structure of an input rectifier and filter module provided in an embodiment of the present invention, the input rectifier and filter module comprising: a first fuse F1, a first varistor RV1, a first X capacitor X1, a first Y capacitor CY1, a second Y capacitor CY2, a second inductor L2, a second X capacitor X2, a fifth Y capacitor CY5, a sixth Y capacitor CY6, a third inductor L3, a third X capacitor X3, a seventh Y capacitor CY7, an eighth Y capacitor CY8, a rectifier bridge DB1, a first grounding conductor PE1, a second grounding conductor PE2 and a third grounding conductor PE3;

[0049] The second end of the first fuse F1 is electrically connected to the first end of the second inductor L2;

[0050] The first end of the first varistor RV1 is electrically connected to the second end of the first fuse F1; the second end of the first varistor RV1 is electrically connected to the second end of the second inductor L2;

[0051] The first end of the first X capacitor X1 is electrically connected to the first end of the second inductor L2; the second end of the first X capacitor X1 is electrically connected to the second end of the second inductor L2;

[0052] The first end of the first Y capacitor CY1 is electrically connected to the second end of the second inductor L2; the first end of the second Y capacitor CY2 is electrically connected to the first end of the second inductor L2; the second end of the first Y capacitor CY1 and the second end of the second Y capacitor CY2 are both electrically connected to the first ground conductor PE1;

[0053] The fourth end of the second inductor L2 is electrically connected to the first end of the third inductor L3; the third end of the second inductor L2 is electrically connected to the second end of the third inductor L3;

[0054] The first end of the second X capacitor X2 is electrically connected to the fourth end of the second inductor L2; the first end of the second X capacitor X2 is electrically connected to the third end of the second inductor L2; the first end of the fifth Y capacitor CY5 is electrically connected to the third end of the second inductor L2; the first end of the sixth Y capacitor CY6 is electrically connected to the fourth end of the second inductor L2; the second end of the fifth Y capacitor CY5 and the second end of the sixth Y capacitor CY6 are both electrically connected to the second ground conductor PE2;

[0055] The fourth end of the third inductor L3 is electrically connected to the third end of the rectifier bridge DB1; the third end of the third inductor L3 is electrically connected to the first end of the rectifier bridge DB1;

[0056] The first end of the third X capacitor X3 is electrically connected to the fourth end of the third inductor L3; the second end of the third X capacitor X3 is electrically connected to the third end of the third inductor L3; the first end of the seventh Y capacitor CY7 is electrically connected to the third end of the third inductor L3; the first end of the eighth Y capacitor CY8 is electrically connected to the fourth end of the third inductor L3; the second end of the seventh Y capacitor CY7 and the second end of the eighth Y capacitor CY8 are both electrically connected to the third grounding conductor PE3;

[0057] The first end of the first fuse F1 and the second end of the second inductor L2 both serve as the input end of the input rectifier and filter module; the second end and the fourth end of the rectifier bridge DB1 both serve as the output end of the input rectifier and filter module, and the second end and the fourth end of the rectifier bridge DB1 are both electrically connected to the input end of the boost module.

[0058] The working principle of the input rectifier and filter module described in this embodiment is: the AC power (i.e., AC220L and AC220N) of the input instantaneous power switching power supply is converted into DC power through multiple X capacitors, multiple Y capacitors, multiple inductors and a rectifier bridge in sequence, and then input into the boost module through the second and third ends of the rectifier bridge DB1.

[0059] This embodiment uses an input rectifier and filter module to filter and rectify the AC power of the input instantaneous power switch power supply into DC power, and implements efficient rectification and filtering with multiple X capacitors, multiple Y capacitors, multiple inductors and a rectifier bridge.

[0060] In this embodiment, please refer to Figure 5 , is a structural schematic diagram of a boost module provided in an embodiment of the present invention, a second thermistor RT2, a first diode D1, a first inductor L1, a fourth resistor R4, a fifth capacitor C5, an eighth resistor R8, a sixth resistor R6, a seventh resistor R7, a third diode D3, a ninth resistor R9, a first transistor Q1, a second diode D2, a first capacitor C1, a fifth resistor R5, a tenth resistor R10, a fifteenth resistor R15, a thirteenth resistor R13, a sixteenth resistor R16, an eighteenth resistor R18, a fourteenth capacitor C14, a twenty-first resistor R21, a twenty-second resistor R22, a fifteenth capacitor C15, a seventeenth capacitor C17, a sixteenth capacitor C16, a twentieth resistor R20, a twenty-third resistor R23, an eleventh capacitor C11, a twelfth capacitor C12 and a first control chip U1;

[0061] The first end of the second thermistor RT2 is electrically connected to the second end of the rectifier bridge DB1; the second end of the fifth capacitor C5 is electrically connected to the fourth end of the rectifier bridge DB1;

[0062] The second end of the second thermistor RT2 is electrically connected to the first end of the fifth capacitor C5; the second end of the second thermistor RT2 is electrically connected to the first end of the first diode D1; the second end of the first diode D1 is electrically connected to the second end of the second diode D2;

[0063] The first end of the fourth resistor R4 is electrically connected to the second end of the second thermistor RT2; the second end of the fourth resistor R4 is electrically connected to the first end of the eighth resistor R8; the second end of the eighth resistor R8 is electrically connected to the second end of the sixteenth resistor R16; the first end of the sixteenth resistor R16 is electrically connected to the fourth pin of the first control chip U1; the fourth pin of the first control chip U1 is electrically connected to the first end of the twenty-second resistor R22; the fourth pin of the first control chip U1 is electrically connected to the first end of the fifteenth capacitor C15; the second end of the twenty-second resistor R22 and the second end of the fifteenth capacitor C15 are both grounded;

[0064] The first end of the first inductor L1 is electrically connected to the second end of the second thermistor RT2; the second end of the first inductor L1 is electrically connected to the third end of the second diode D2;

[0065] The first end of the fifth resistor R5 is electrically connected to the second end of the second diode D2; the second end of the fifth resistor R5 is electrically connected to the first end of the tenth resistor R10; the second end of the tenth resistor R10 is electrically connected to the first end of the fifteenth resistor R15; the second end of the fifteenth resistor R15 is electrically connected to the sixth pin of the first control chip U1; the first end of the eleventh capacitor C11 is electrically connected to the sixth pin of the first control chip U1; the first end of the twenty-third resistor R23 is electrically connected to the sixth pin of the first control chip U1; the second end of the eleventh capacitor C11 and the second end of the twenty-third resistor R23 are both grounded;

[0066] The first end of the first capacitor C1 is electrically connected to the second end of the second diode D2; the second end of the first capacitor C1 is grounded; the second end of the first capacitor C1 is electrically connected to the third end of the first transistor Q1; the second end of the first transistor Q1 is electrically connected to the third end of the second diode D2; the first end of the first transistor Q1 is electrically connected to the positive electrode of the third diode D3; the negative electrode of the third diode D3 is electrically connected to the second end of the sixth resistor R6; the first end of the first transistor Q1 is electrically connected to the second end of the seventh resistor R7; the first end of the seventh resistor R7 is electrically connected to the first end of the sixth resistor R6 ; The third end of the first transistor Q1 is electrically connected to the second end of the thirteenth resistor R13; the first end of the thirteenth resistor R13 is electrically connected to the second end of the fifth capacitor C5; the first end of the ninth resistor R9 is electrically connected to the first end of the first transistor Q1; the second end of the ninth resistor R9 is electrically connected to the second end of the thirteenth resistor R13; the second end of the thirteenth resistor R13 is electrically connected to the second end of the eighteenth resistor R18; the first end of the eighteenth resistor R18 is electrically connected to the third pin of the first control chip U1; the first end of the sixth resistor R6 is electrically connected to the eighth pin of the first control chip U1;

[0067] The fifth pin of the first control chip U1 is electrically connected to the first end of the seventeenth capacitor C17; the fifth pin of the first control chip U1 is electrically connected to the first end of the twentieth resistor R20; the second end of the twentieth resistor R20 is electrically connected to the first end of the sixteenth capacitor C16; the second end of the seventeenth capacitor C17 and the second end of the sixteenth capacitor C16 are both grounded;

[0068] The first pin of the first control chip U1 is grounded; the second pin of the first control chip U1 is electrically connected to the first end of the fourteenth capacitor C14; the second pin of the first control chip U1 is electrically connected to the first end of the twenty-first resistor R21; the second end of the fourteenth capacitor C14 and the second end of the twenty-first resistor R21 are both grounded; the first end of the twelfth capacitor C12 is electrically connected to the seventh pin of the first control chip U1; the second end of the twelfth capacitor C12 is grounded;

[0069] The second end of the second diode D2 and the seventh pin of the first control chip U1 both serve as output ends of the boost module.

[0070] The working principle of the boost module of this embodiment is: the components of the boost module form a BOOST topology of CCM (Continuous Conductive Mode) to convert direct current into HV+ voltage and +12V_VCC voltage (ie, the first direct current).

[0071] In this embodiment, the voltage boosting module boosts the DC power output by the input rectifying and filtering module, increases the phase of the current, reduces the harmonic components of the current, and improves the power factor, thereby improving the utilization rate of the mains power.

[0072] In this embodiment, please refer to Figure 6 , is a schematic diagram of the structure of a resonant half-bridge feedback module provided in an embodiment of the present invention, the resonant half-bridge feedback module 107 includes: a one-hundred-ninth capacitor C109, a one-hundredth photoelectric coupler OP100, a one-hundred-twenty-first resistor R121, a one-hundred-twenty-second resistor R122, a one-hundred-thirty-third resistor R133, a one-hundred-eighth resistor R128, a one-hundred-eleventh capacitor C111, a one-hundred-twenty-fourth resistor R124 and a one-hundred-first voltage stabilizing diode U101;

[0073] Wherein, the first end of the first-hundred-twenty-second resistor R122 is electrically connected to the first end of the first-hundred-twenty-first resistor R121; the second end of the first-hundred-twenty-first resistor R121 is electrically connected to the first end of the first-hundred-twenty-second photoelectric coupler OP100; the second end of the first-hundred-twenty-second resistor R122 is electrically connected to the first end of the first-hundred-twenty-third resistor R133; the second end of the first-hundred-twenty-third resistor R133 is grounded; the first end of the first-hundred-twenty-first Zener diode U101 is electrically connected to the first end of the first-hundred-twenty-third resistor R133; the third end of the first-hundred-twenty-first Zener diode U101 is grounded; the second end of the first-hundred-twenty-first Zener diode U101 is electrically connected to the second end of the first-hundred-twenty-first photoelectric coupler OP100;

[0074] The first end of the first-hundred-twenty-fourth resistor R124 is electrically connected to the second end of the first-hundred-twenty-one resistor R121; the second end of the first-hundred-twenty-fourth resistor R124 is electrically connected to the second end of the first-hundred-twenty-one zener diode U101; the first end of the first-hundred-twenty-eleventh capacitor C111 is electrically connected to the second end of the first-hundred-twenty-fourth resistor R124; the second end of the first-hundred-twenty-eleventh capacitor C111 is electrically connected to the first end of the first-hundred-twenty-eighth resistor R128; the second end of the first-hundred-twenty-eighth resistor R128 is electrically connected to the second end of the first-hundred-twenty-two resistor R122;

[0075] The first end of the first one hundred and ninth capacitor C109 is electrically connected to the fourth end of the first one hundred photoelectric coupler OP100; the second end of the first one hundred and ninth capacitor C109 is electrically connected to the third end of the first one hundred photoelectric coupler OP100; the second end of the first one hundred and ninth capacitor C109 is grounded;

[0076] The first end of the one hundred and twenty second resistor R122 is electrically connected to the first end of the tenth inductor L10;

[0077] The fourth end of the first photoelectric coupler OP100 is electrically connected to the feedback input end of the resonant half-bridge voltage conversion module.

[0078] The working principle of the resonant half-bridge feedback module of this embodiment is: by detecting the VOUT1+ voltage in the output synchronous rectification module, and feeding back the monitoring result to the first control chip of the resonant half-bridge voltage conversion module.

[0079] This embodiment can improve the conversion efficiency of the resonant half-bridge voltage conversion module through the resonant half-bridge feedback module, thereby improving the working efficiency of the instantaneous power switch power supply.

[0080] In this embodiment, please refer to Figure 7 , is a schematic diagram of the structure of a resonant half-bridge voltage conversion module provided by an embodiment of the present invention, wherein the resonant half-bridge voltage conversion module includes: a one-hundred-and-fifth resistor R105, a one-hundred-and-eleventh resistor R110, a one-hundred-and-twelfth resistor R112, a one-hundred-and-seventeenth resistor R117, a one-hundred-and-fourth capacitor C104, a one-hundred-and-sixth resistor R106, a one-hundred-and-eighth resistor R108, a one-hundred-and-nineth diode D100, a one-hundred-and-ninth resistor R109, a one-hundred-and-fourth transistor Q104, a one-hundred-and-eleventh resistor R111, a one-hundred-and-thirteenth resistor R113, a one-hundred-and-first diode D101, a one-hundred-and-fourteenth resistor R114, a one-hundred-and-sixth transistor Q106, a one-hundred-and-inductor L100, a one-hundred-and-eighth transformer T100, Capacitor C118, the one hundred and twentieth resistor R120, the one hundred and sixth capacitor C106, the one hundred and seventh capacitor C107, the one hundred and eighth capacitor C108, the one hundred and thirtieth resistor R130, the one hundred and thirty-first resistor R131, the one hundred and twenty-ninth resistor R129, the one hundred and thirty-second resistor R132, the one hundred and thirty-fourth resistor R134, the one hundred and fourteenth capacitor C114, the one hundredth control chip U100, the one hundred and fifth capacitor C105, the one hundred and second diode D102, the one hundred and tenth capacitor C110, the one hundred and thirty-fifth resistor R135, the one hundred and fifteenth capacitor C115, the one hundred and third diode D103, the one hundred and fourth diode D104, the one hundred and thirteenth capacitor C113 and the one hundred and twenty-fifth resistor R125;

[0081] Wherein, the second end of the first one hundred and five resistor R105 is electrically connected to the first end of the first one hundred and ten resistor R110; the second end of the first one hundred and ten resistor R110 is electrically connected to the first end of the first one hundred and twelfth resistor R112; the second end of the first one hundred and twelfth resistor R112 is electrically connected to the first end of the first one hundred and seventeenth resistor R117; the second end of the first one hundred and twelfth resistor R112 is electrically connected to the first end of the first one hundred and four capacitor C104; the second end of the first one hundred and seventeenth resistor R117 and the second end of the first one hundred and four capacitor C104 are both grounded;

[0082] The second end of the 104th transistor Q104 is electrically connected to the first end of the 105th resistor R105; the first end of the 104th transistor Q104 is electrically connected to the positive electrode of the 100th diode D100; the negative electrode of the 100th diode D100 is electrically connected to the second end of the 106th resistor R106; the second end of the 108th resistor R108 is electrically connected to the positive electrode of the 100th diode D100; the first end of the 108th resistor R108 is electrically connected to the first end of the 106th resistor R106; the first end of the 109th resistor R109 is electrically connected to the first end of the 104th transistor Q104; the second end of the 109th resistor R109 is electrically connected to the third end of the 104th transistor Q104; the third end of the 104th transistor Q104 is electrically connected to the fourteenth pin of the 100th control chip U100; the first end of the 106th resistor R106 is electrically connected to the fifteenth pin of the 100th control chip U100;

[0083] The second end of the 106th transistor Q106 is electrically connected to the third end of the 104th transistor Q104; the third end of the 106th transistor Q106 is grounded; the first end of the 106th transistor Q106 is electrically connected to the positive electrode of the 101st diode D101; the negative electrode of the 101st diode D101 is electrically connected to the second end of the 111th resistor R111; the second end of the 113th resistor R113 is electrically connected to the positive electrode of the 101st diode D101; the first end of the 113th resistor R113 is electrically connected to the first end of the 111th resistor R111; the first end of the 111th resistor R111 is electrically connected to the eleventh pin of the 100th control chip U100; the first end of the 114th resistor R114 is electrically connected to the first end of the 106th transistor Q106; the second end of the 114th resistor R114 is electrically connected to the third end of the 106th transistor Q106;

[0084] The first end of the first hundredth inductor L100 is electrically connected to the third end of the first hundredth transistor Q104; the second end of the first hundredth inductor L100 is electrically connected to the second end of the primary side of the first hundredth transformer T100; the first end of the primary side of the first hundredth transformer T100 is electrically connected to the second end of the first hundredth capacitor C118; the first end of the first hundredth capacitor C118 is grounded;

[0085] The second pin of the first-hundred control chip U100 is electrically connected to the second end of the first-hundred-twenty resistor R120; the second pin of the first-hundred control chip U100 is electrically connected to the second end of the first-hundred-sixth capacitor C106; the third pin of the first-hundred control chip U100 is electrically connected to the second end of the first-hundred-seventh capacitor C107; the first pin of the first-hundred control chip U100 is electrically connected to the second end of the first-hundred-eighth capacitor C108; the fifth pin of the first-hundred control chip U100 is electrically connected to the first end of the first-hundred-fourteenth capacitor C114; the fourth pin of the first-hundred control chip U100 is electrically connected to the first end of the first-hundred-thirtieth resistor R130;

[0086] The first end of the first one hundred and twenty resistor R120, the first end of the first one hundred and six capacitor C106, the first end of the first one hundred and seven capacitor C107, the first end of the first one hundred and eight capacitor C108, the second end of the first one hundred and fourteen capacitor C114 and the second end of the first thirty resistor R130 are all grounded;

[0087] The second end of the 129th resistor R129 is electrically connected to the first pin of the 100th control chip U100; the first end of the 129th resistor R129 is electrically connected to the first end of the 131st resistor R131; the second end of the 131st resistor R131 is electrically connected to the first end of the 134th resistor R134; the first end of the 132nd resistor R132 is electrically connected to the first end of the 134th resistor R134; the second end of the 132nd resistor R132 is electrically connected to the fifth pin of the 100th control chip U100;

[0088] The first end of the first-hundred-tenth capacitor C110 is electrically connected to the sixteenth pin of the first-hundredth control chip U100; the second end of the first-hundred-tenth capacitor C110 is electrically connected to the fourteenth pin of the first-hundredth control chip U100; the second end of the first-hundred-fifth capacitor C105 is grounded; the first end of the first-hundred-fifth capacitor C105 is electrically connected to the twelfth pin of the first-hundredth control chip U100; the anode of the first-hundred-second diode D102 is electrically connected to the first end of the first-hundred-fifth capacitor C105; the cathode of the first-hundred-second diode D102 is electrically connected to the sixteenth pin of the first-hundredth control chip U100;

[0089] The first end of the first 25th resistor R125 is electrically connected to the second end of the first 103rd capacitor C103; the second end of the first 25th resistor R125 is electrically connected to the first end of the first 113th capacitor C113; the second end of the first 113th capacitor C113 is electrically connected to the positive electrode of the first 103rd diode D103; the negative electrode of the first 103rd diode D103 is electrically connected to the sixth pin of the first 100th control chip U100; the first end of the first 135th resistor R135 is electrically connected to the sixth pin of the first 100th control chip U100 The first end of the first-hundred-and-fifteenth capacitor C115 is electrically connected to the sixth pin of the first-hundred-and-fourth control chip U100; the cathode of the first-hundred-and-fourth diode D104 is electrically connected to the anode of the first-hundred-and-three diode D103; the tenth pin of the first-hundred-and-three control chip U100, the second end of the first-hundred-and-thirty-five resistor R135, the second end of the first-hundred-and-fifteenth capacitor C115 and the anode of the first-hundred-and-fourth diode D104 are all grounded; the seventh pin of the first-hundred-and-fourth control chip U100 is electrically connected to the first end of the first-hundred-and-fourth capacitor C104;

[0090] The seventh pin of the first one hundred control chip U100 is used as the control end of the resonant half-bridge voltage conversion module, and is electrically connected to the fourth end of the first one hundred and first photoelectric coupler OP101; the first end of the first one hundred and fifth capacitor C105 is electrically connected to the seventh pin of the first control chip U1; the second end of the first one hundred and thirty-four resistor R134 is electrically connected to the fourth end of the first one hundred photoelectric coupler OP100; the first end of the first one hundred and fifth resistor R105 is electrically connected to the second end of the second diode D2;

[0091] The third end, the fourth end and the fifth end of the secondary side of the one hundredth transformer T100 all serve as the output end of the resonant half-bridge voltage conversion module, wherein the third end of the secondary side of the one hundredth transformer T100 is electrically connected to the second end of the one hundred and fourth resistor R104; the fifth end of the secondary side of the one hundredth transformer T100 is electrically connected to the second end of the one hundred and eighteenth resistor R118; the fourth end of the secondary side of the one hundredth transformer T100 is electrically connected to the first end of the tenth inductor L10.

[0092] The resonant half-bridge voltage conversion module of the present embodiment is a resonant half-bridge DCDC voltage conversion module, and the voltage is converted into the required voltage through the resonant half-bridge DCDC voltage conversion module.

[0093] This embodiment can perform voltage conversion through the resonant half-bridge voltage conversion module to obtain a voltage corresponding to the load, thereby ensuring that the instantaneous power switch power supply can match the load.

[0094] In this embodiment, if Figure 8 , which is a schematic diagram of the structure of an auxiliary power supply module provided in an embodiment of the present invention, wherein the auxiliary power supply module includes: a nineteenth capacitor C19, a thirty-third resistor R33, a thirty-sixth resistor R36, a forty-first resistor R41, a forty-second capacitor C42, a forty-ninth resistor R49, a forty-third capacitor C43, a twenty-seventh capacitor C27, a thirty-first resistor R31, a seventh diode D7, a twenty-second diode D22, a fifty-fifth capacitor C55, a tenth diode D10, a fifty-sixth resistor R56, a fortieth capacitor C40, a fifty-second resistor R52, a sixty-first Resistor R61, sixty-fourth resistor R64, thirty-ninth capacitor C39, sixty-second resistor R62, sixty-third resistor R63, second triode Q2, eleventh diode D11, thirty-first capacitor C31, fifty-eighth resistor R58, twenty-ninth resistor R29, third photocoupler OP3, sixtieth resistor R60, sixty-fifth resistor R65, seventieth resistor R70, thirty-seventh capacitor C37, forty-eighth resistor R48, fifty-fifth resistor R55, twenty-sixth capacitor C26, first transformer T1, fifth voltage stabilizing diode U5 and third control chip U3;

[0095] Wherein, the second end of the nineteenth capacitor C19 is grounded; the first end of the thirty-third resistor R33 is electrically connected to the first end of the nineteenth capacitor C19; the second end of the thirty-third resistor R33 is electrically connected to the first end of the thirty-sixth resistor R36; the second end of the thirty-sixth resistor R36 is electrically connected to the first end of the forty-first resistor R41; the second end of the forty-first resistor R41 is electrically connected to the first end of the forty-second capacitor C42; the second end of the forty-second capacitor C42 is electrically connected to the fifth pin of the third control chip U3; the second end of the forty-second capacitor C42 is grounded;

[0096] The first end of the 27th capacitor C27 is electrically connected to the first end of the 19th capacitor C19; the second end of the 27th capacitor C27 is electrically connected to the cathode of the 7th diode D7; the first end of the 31st resistor R31 is electrically connected to the first end of the 19th capacitor C19; the second end of the 31st resistor R31 is electrically connected to the cathode of the 7th diode D7; the first end of the primary coil of the first transformer T1 is electrically connected to the first end of the 19th capacitor C19; the second end of the primary coil of the first transformer T1 is electrically connected to the anode of the 7th diode D7;

[0097] The anode of the 22nd diode D22 is electrically connected to the third end of the primary coil of the first transformer T1; the cathode of the 22nd diode D22 is electrically connected to the first end of the 55th capacitor C55; the second end of the 55th capacitor C55 is grounded; the cathode of the 22nd diode D22 is electrically connected to the anode of the 10th diode D10; the cathode of the 10th diode D10 is electrically connected to the second end of the 41st resistor R41; the fourth end of the primary coil of the first transformer T1 is grounded;

[0098] The sixth pin of the third control chip U3 is electrically connected to the first end of the sixty-fourth resistor R64; the first end of the sixty-first resistor R61 is electrically connected to the first end of the second transistor Q2; the second end of the sixty-first resistor R61 is electrically connected to the first end of the sixty-second resistor R62; the second end of the sixty-fourth resistor R64 is electrically connected to the first end of the sixty-third resistor R63; the second end of the sixty-fourth resistor R64 is electrically connected to the first end of the sixty-second resistor R62; the second end of the sixty-third resistor R63 and the second end of the sixty-second resistor R62 are both grounded; the first end of the thirty-ninth capacitor C39 is electrically connected to the first end of the sixty-fourth resistor R64; the second end of the thirty-ninth capacitor C39 is grounded; the fourth pin of the third control chip U3 is electrically connected to the first end of the fifty-sixth resistor R56; the second end of the fifty-sixth resistor R56 is electrically connected to the first end of the second transistor Q2 ; The second end of the second transistor Q2 is electrically connected to the second end of the primary coil of the first transformer T1; the third end of the second transistor Q2 is electrically connected to the first end of the sixty-third resistor R63; the third pin of the third control chip U3 is electrically connected to the first end of the fortieth capacitor C40; the second end of the fortieth capacitor C40 is grounded; the first end of the fortieth capacitor C40 is electrically connected to the first end of the fifty-second resistor R52; the second end of the fifty-second resistor R52 is electrically connected to the first end of the sixty-fourth resistor R64; the seventh pin of the third control chip U3 is electrically connected to the first end of the forty-ninth resistor R49; the second end of the forty-ninth resistor R49 is grounded; the eighth pin of the third control chip U3 is electrically connected to the first end of the forty-third capacitor C43; the second end of the forty-third capacitor C43 is grounded; the second pin of the third control chip U3 is electrically connected to the negative electrode of the tenth diode D10;

[0099] The first end of the secondary coil of the first transformer T1 is electrically connected to the anode of the eleventh diode D11; the cathode of the eleventh diode D11 is electrically connected to the first end of the thirty-first capacitor C31; the second end of the thirty-first capacitor C31 is grounded; the second end of the secondary coil of the first transformer T1 is grounded; the first end of the fifty-eighth resistor R58 is electrically connected to the cathode of the eleventh diode D11; the second end of the fifty-eighth resistor R58 is grounded;

[0100] The first end of the 29th resistor R29 is electrically connected to the cathode of the 11th diode D11; the second end of the 29th resistor R29 is electrically connected to the first end of the third photoelectric coupler OP3; the first end of the 60th resistor R60 is electrically connected to the cathode of the 11th diode D11; the second end of the 60th resistor R60 is electrically connected to the second end of the 65th resistor R65; the first end of the 65th resistor R65 is electrically connected to the second end of the 37th capacitor C37; the first end of the 37th capacitor C37 is electrically connected to the second end of the third photoelectric coupler OP3; The first end of the third photocoupler OP3 is electrically connected to the first end of the forty-eighth resistor R48; the second end of the forty-eighth resistor R48 is electrically connected to the first end of the thirty-seventh capacitor C37; the second end of the fifth voltage zener diode U5 is electrically connected to the first end of the thirty-seventh capacitor C37; the first end of the fifth voltage zener diode U5 is electrically connected to the second end of the sixty-fifth resistor R65; the third end of the fifth voltage zener diode U5 is grounded; the first end of the seventieth resistor R70 is grounded; the second end of the seventieth resistor R70 is electrically connected to the first end of the fifth voltage zener diode U5;

[0101] The fourth end of the third photoelectric coupler OP3 is electrically connected to the first pin of the third control chip U3; the fourth end of the third photoelectric coupler OP3 is electrically connected to the first end of the fifty-fifth resistor R55; the second end of the fifty-fifth resistor R55 is electrically connected to the first end of the twenty-sixth capacitor C26; the second end of the twenty-sixth capacitor C26 is grounded; the third end of the third photoelectric coupler OP3 is grounded;

[0102] The anode of the tenth diode D10 is connected to the input end of the auxiliary power supply module, which is electrically connected to the output end of the boost module; the first end of the nineteenth capacitor C19 is connected to the input end of the auxiliary power supply module, which is electrically connected to the output end of the boost module;

[0103] The cathode of the eleventh diode D11 serves as the output end of the auxiliary power supply module, and the cathode of the eleventh diode D11 is electrically connected to the power supply input end of the current limiting delay module, and is also electrically connected to the power supply input end of the output synchronous rectification module.

[0104] The auxiliary power supply module of this embodiment adopts a flyback topology structure to provide a +12V voltage to the output synchronous rectification module and the current limiting delay module.

[0105] In this embodiment, regulating the resonant half-bridge voltage conversion module according to the output direct current specifically includes:

[0106] Obtaining a voltage at a third terminal of the first operational amplifier according to the current of the output direct current;

[0107] When the voltage at the third terminal of the first operational amplifier is greater than the voltage at the second terminal of the first operational amplifier, the voltage at the first terminal of the first operational amplifier changes from a low level to a high level to charge the first one hundred and nineteenth capacitor;

[0108] The voltage at the sixth terminal of the second operational amplifier is determined according to the first-hundred-nineteenth capacitor. When the voltage at the sixth terminal of the second operational amplifier is greater than the voltage at the fifth terminal of the second operational amplifier, the voltage at the seventh terminal of the second operational amplifier changes from a high level to a low level, so that the first-hundred-one photocoupler is turned on, and the voltage at the fourth terminal of the first-hundred-one photocoupler is pulled down, thereby causing the first-hundred-one control chip to stop working.

[0109] It should be noted that the model of the one hundredth control chip U100 described in this embodiment is EG6599, which is an LLC resonant controller; the model of the first control chip U1 is SC3654, which is a PFC controller; the model of the third control chip U3 is CYT5021, which is a PWM controller; the models of the one hundredth photocoupler OP101, the one hundredth photocoupler OP100 and the third photocoupler OP3 are all or-357c; the model of the rectifier bridge DB1 is GBJ2508; the model of the first operational amplifier U102A and the second operational amplifier U102B are both XL2904D.

[0110] In summary, the embodiment of the present invention samples the current of the output direct current output by the output synchronous rectification module, and regulates the resonant half-bridge voltage conversion module according to the current of the output direct current, so as to perform current limiting and delay protection on the instantaneous power switching power supply, so that the output of the instantaneous power switching power supply can carry a larger capacitive load and instantaneous power; the present invention adds a current limiting and delay module to the instantaneous power switching power supply, thereby avoiding the problem in the prior art that the power supply cannot carry a larger capacitive load or instantaneous power due to increasing the power supply volume or using a digital power supply for delay and current limiting, and can be applied to loads that require transient high power, thereby improving the applicability of the instantaneous power switching power supply.

[0111] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An instantaneous power switching power supply, characterized in that: include: Input rectification and filtering module, boost module, resonant half-bridge voltage conversion module, output synchronous rectification module and current limiting delay module; Wherein, the input end of the input rectification and filtering module serves as the input end of the instantaneous power switch power supply; the output end of the output synchronous rectification module serves as the output end of the instantaneous power switch power supply; The input rectifying and filtering module is used to rectify the mains power input to the instantaneous power switch power supply into direct current; the boosting module is used to boost the direct current into a first direct current; the resonant half-bridge voltage conversion module is used to convert the first direct current into a second direct current; the output synchronous rectifying module is used to synchronously rectify the second direct current into an output direct current; The current limiting delay module is used to sample the current of the output direct current, and regulate the resonant half-bridge voltage conversion module according to the current of the output direct current, so as to perform current limiting delay protection on the instantaneous power switch power supply.

2. An instantaneous power switching power supply as claimed in claim 1, characterized in that: It also includes an auxiliary power supply module. The input end of the auxiliary power supply module is electrically connected to the output end of the boost module; The output end of the auxiliary power supply module is electrically connected to the power supply input end of the output synchronous rectification module; The output end of the auxiliary power supply module is electrically connected to the power supply input end of the current limiting delay module.

3. An instantaneous power switching power supply as claimed in claim 2, characterized in that: The current limiting delay module includes: a first resistor, a second resistor, a one-hundred-thirty-eighth resistor, a one-hundred-forty resistor, a one-hundred-forty-third resistor, a one-hundred-thirty-ninth resistor, a one-hundred-forty-first resistor, a one-hundred-forty-second resistor, a one-hundred-thirty-seventh resistor, a one-hundred-sixth resistor, a third capacitor, a fourth capacitor, a second capacitor, a one-hundred-sixteenth capacitor, a one-hundred-nineteenth capacitor, a one-twentieth capacitor, a one-hundred-seventh capacitor, a one-hundred-fifth diode, a first operational amplifier, a second operational amplifier, and a one-hundred-first photoelectric coupler; Wherein, the first end of the second resistor is electrically connected to the third end of the first operational amplifier; the second end of the third capacitor is electrically connected to the second end of the second resistor; the first end of the third capacitor is electrically connected to the first end of the second resistor; the second end of the first 138 resistor is electrically connected to the first end of the second resistor; the second end of the first resistor is electrically connected to the first end of the first 140 resistor; the first end of the first 140 resistor is electrically connected to the first end of the fourth capacitor; the first end of the fourth capacitor is electrically connected to the second end of the first operational amplifier; the second end of the fourth capacitor and the second end of the first 140 resistor are both grounded; the second end of the second capacitor is electrically connected to the third end of the first operational amplifier; the first end of the second capacitor is electrically connected to the second end of the first 143 resistor; the first end of the first 143 resistor is electrically connected to the first end of the first operational amplifier; the second end of the first 116 capacitor is electrically connected to the power supply end of the first operational amplifier; the first end of the first 116 capacitor is grounded; the fourth end of the first operational amplifier is grounded; The second end of the 139th resistor is electrically connected to the first end of the first operational amplifier; the first end of the 139th resistor is electrically connected to the first end of the 119th capacitor; the first end of the 139th resistor is electrically connected to the first end of the 141st resistor; the second end of the 119th capacitor and the second end of the 141st resistor are both grounded; The sixth end of the second operational amplifier is electrically connected to the first end of the first one hundred and thirty-nine resistor; the second end of the first one hundred and seventeen capacitor is electrically connected to the sixth end of the second operational amplifier; the first end of the first one hundred and seventeen capacitor is electrically connected to the seventh end of the second operational amplifier; the second end of the first one hundred and thirty-seven resistor is electrically connected to the first end of the first one hundred and forty-two resistor; the first end of the first one hundred and forty-two resistor is electrically connected to the first end of the first one hundred and twenty capacitor; the second end of the first one hundred and twenty capacitor and the second end of the first one hundred and forty-two resistor are both grounded; the first end of the first one hundred and twenty capacitor is electrically connected to the fifth end of the second operational amplifier; the negative electrode of the first one hundred and five diode is electrically connected to the seventh end of the second operational amplifier; the positive electrode of the first one hundred and five diode is electrically connected to the second end of the first one hundred and one photoelectric coupler; the first end of the first one hundred and one photoelectric coupler is electrically connected to the second end of the first one hundred and thirty-six resistor; the third end of the first one hundred and one photoelectric coupler is grounded; The second end of the second resistor is electrically connected to the output end of the output synchronous rectification module, and is used to sample the current of the output direct current output by the output synchronous rectification module; The fourth end of the 101st photoelectric coupler is electrically connected to the control end of the resonant half-bridge voltage conversion module; The first end of the first resistor, the first end of the first one hundred and thirty-eighth resistor, the second end of the first one hundred and sixteenth capacitor, the first end of the first one hundred and thirty-seventh resistor and the first end of the first one hundred and thirty-sixth resistor all serve as power supply input ends of the current limiting delay module.

4. An instantaneous power switching power supply as claimed in claim 3, characterized in that: The output synchronous rectification module includes: a 105th transistor, a 101st transistor, a 102nd transistor, a 107th resistor, a 100th resistor, a 100th capacitor, a 101st resistor, a 103rd resistor, a 103rd transistor, a 104th resistor, a 107th transistor, a 108th transistor, a 113th transistor, a 116th resistor, a 112th capacitor, a 119th resistor, a 123rd resistor, a 109th transistor, a 111th transistor, a 126th resistor, a 118th resistor, a 103rd capacitor, a 102nd capacitor, a 101st inductor, a 101st capacitor, a 102nd resistor, a 127th resistor and a 115th resistor; Among them, the first end of the 104th resistor is electrically connected to the second end of the 103rd transistor; the first end of the 103rd transistor is electrically connected to the first end of the 105th transistor; the third end of the 103rd transistor is electrically connected to the second end of the 102nd resistor; the third end of the 101st transistor is electrically connected to the second end of the 101st resistor; the second end of the 101st transistor is electrically connected to the second end of the 109th transistor; the second end of the 101st transistor is electrically connected to the third end of the 105th transistor; the first end of the 103rd resistor is electrically connected to the second end of the 101st resistor; the second end of the 103rd resistor is electrically connected to the third end of the 105th transistor; the third end of the 102nd transistor is electrically connected to the third end of the 105th transistor; The first end of the second transistor is electrically connected to the second end of the first one hundred and first resistor; the second end of the first one hundred and second transistor is electrically connected to the second end of the first one hundred and first transistor; the first end of the first one hundred and first transistor is electrically connected to the first end of the first one hundred and second transistor; the second end of the first one hundred and first transistor is electrically connected to the first end of the first one hundred and fifth transistor; the second end of the first one hundred and fifth transistor is electrically connected to the second end of the first one hundred and fourth resistor; the first end of the first one hundred and seventh resistor is electrically connected to the second end of the first one hundred and second transistor; the second end of the first one hundred and seventh resistor is electrically connected to the third end of the first one hundred and fifth transistor; the second end of the first one hundred capacitor is grounded; the first end of the first one hundred capacitor is electrically connected to the third end of the first one hundred transistor; the second end of the first one hundred resistor is electrically connected to the first end of the first one hundred capacitor; The first end of the 118th resistor is electrically connected to the second end of the 111th transistor; the third end of the 111th transistor is electrically connected to the first end of the 126th resistor; the first end of the 111th transistor is electrically connected to the first end of the 109th transistor; the third end of the 109th transistor is electrically connected to the first end of the 123rd resistor; the second end of the 119th resistor is electrically connected to the first end of the 123rd resistor; the first end of the 119th resistor is electrically connected to the third end of the 107th transistor; the second end of the 109th transistor is electrically connected to the third end of the 107th transistor; the third end of the 113th transistor is electrically connected to the third end of the 107th transistor; the second end of the 113th transistor is electrically connected to the first end of the 108th transistor the first end of the 113th transistor is electrically connected to the first end of the 108th transistor; the first end of the 108th transistor is electrically connected to the third end of the 109th transistor; the second end of the 108th transistor is electrically connected to the first end of the 107th transistor; the third end of the 108th transistor is electrically connected to the first end of the 127th resistor; the first end of the 112th capacitor is electrically connected to the first end of the 127th resistor; the second end of the 112th capacitor is grounded; the second end of the 116th resistor is electrically connected to the second end of the 108th transistor; the first end of the 116th resistor is electrically connected to the third end of the 107th transistor; the second end of the 107th transistor is electrically connected to the second end of the 118th resistor; The first end of the 103rd capacitor is electrically connected to the first end of the 10th inductor; the first end of the 102nd capacitor is electrically connected to the first end of the 10th inductor; the second end of the 103rd capacitor and the second end of the 102nd capacitor are both grounded; the first end of the 101st capacitor is electrically connected to the second end of the 10th inductor; the second end of the 101st capacitor is electrically connected to the second end of the 115th resistor; the first end of the 115th resistor is grounded; The first end of the tenth inductor is electrically connected to the output end of the resonant half-bridge voltage conversion module; the second end of the first one hundred and four resistors is electrically connected to the output end of the resonant half-bridge voltage conversion module; the second end of the first one hundred and eighteen resistors is electrically connected to the output end of the resonant half-bridge voltage conversion module; The first end of the 102nd resistor, the first end of the 101st resistor, the first end of the 100th resistor, the second end of the 126th resistor, the second end of the 123rd resistor, and the second end of the 127th resistor all serve as the power supply input end of the output synchronous rectification module; The second end of the tenth inductor and the second end of the first one hundred and fifteenth resistor both serve as output ends of the output synchronous rectification module.

5. An instantaneous power switching power supply as claimed in claim 4, characterized in that: The input rectifier and filter module includes: a first fuse, a first varistor, a first X capacitor, a first Y capacitor, a second Y capacitor, a second inductor, a second X capacitor, a fifth Y capacitor, a sixth Y capacitor, a third inductor, a third X capacitor, a seventh Y capacitor, an eighth Y capacitor, a rectifier bridge, a first grounding conductor, a second grounding conductor and a third grounding conductor; The second end of the first fuse is electrically connected to the first end of the second inductor; The first end of the first varistor is electrically connected to the second end of the first fuse; the second end of the first varistor is electrically connected to the second end of the second inductor; The first end of the first X capacitor is electrically connected to the first end of the second inductor; the second end of the first X capacitor is electrically connected to the second end of the second inductor; The first end of the first Y capacitor is electrically connected to the second end of the second inductor; the first end of the second Y capacitor is electrically connected to the first end of the second inductor; the second end of the first Y capacitor and the second end of the second Y capacitor are both electrically connected to the first ground conductor; The fourth end of the second inductor is electrically connected to the first end of the third inductor; the third end of the second inductor is electrically connected to the second end of the third inductor; The first end of the second X capacitor is electrically connected to the fourth end of the second inductor; the first end of the second X capacitor is electrically connected to the third end of the second inductor; the first end of the fifth Y capacitor is electrically connected to the third end of the second inductor; the first end of the sixth Y capacitor is electrically connected to the fourth end of the second inductor; the second end of the fifth Y capacitor and the second end of the sixth Y capacitor are both electrically connected to the second ground conductor; The fourth end of the third inductor is electrically connected to the third end of the rectifier bridge; the third end of the third inductor is electrically connected to the first end of the rectifier bridge; The first end of the third X capacitor is electrically connected to the fourth end of the third inductor; the second end of the third X capacitor is electrically connected to the third end of the third inductor; the first end of the seventh Y capacitor is electrically connected to the third end of the third inductor; the first end of the eighth Y capacitor is electrically connected to the fourth end of the third inductor; the second end of the seventh Y capacitor and the second end of the eighth Y capacitor are both electrically connected to the third ground conductor; The first end of the first fuse and the second end of the second inductor both serve as the input end of the input rectifier and filter module; the second end and the fourth end of the rectifier bridge both serve as the output end of the input rectifier and filter module, and the second end and the fourth end of the rectifier bridge are both electrically connected to the input end of the boost module.

6. An instantaneous power switching power supply as claimed in claim 5, characterized in that: The boost module includes: a second thermistor, a first diode, a first inductor, a fourth resistor, a fifth capacitor, an eighth resistor, a sixth resistor, a seventh resistor, a third diode, a ninth resistor, a first triode, a second diode, a first capacitor, a fifth resistor, a tenth resistor, a fifteenth resistor, a thirteenth resistor, a sixteenth resistor, an eighteenth resistor, a fourteenth capacitor, a twenty-first resistor, a twenty-second resistor, a fifteenth capacitor, a seventeenth capacitor, a sixteenth capacitor, a twentieth resistor, a twenty-third resistor, an eleventh capacitor, a twelfth capacitor and a first control chip; The first end of the second thermistor is electrically connected to the second end of the rectifier bridge; the second end of the fifth capacitor is electrically connected to the fourth end of the rectifier bridge; The second end of the second thermistor is electrically connected to the first end of the fifth capacitor; the second end of the second thermistor is electrically connected to the first end of the first diode; the second end of the first diode is electrically connected to the second end of the second diode; The first end of the fourth resistor is electrically connected to the second end of the second thermistor; the second end of the fourth resistor is electrically connected to the first end of the eighth resistor; the second end of the eighth resistor is electrically connected to the second end of the sixteenth resistor; the first end of the sixteenth resistor is electrically connected to the fourth pin of the first control chip; the fourth pin of the first control chip is electrically connected to the first end of the twenty-second resistor; the fourth pin of the first control chip is electrically connected to the first end of the fifteenth capacitor; the second end of the twenty-second resistor and the second end of the fifteenth capacitor are both grounded; The first end of the first inductor is electrically connected to the second end of the second thermistor; the second end of the first inductor is electrically connected to the third end of the second diode; The first end of the fifth resistor is electrically connected to the second end of the second diode; the second end of the fifth resistor is electrically connected to the first end of the tenth resistor; the second end of the tenth resistor is electrically connected to the first end of the fifteenth resistor; the second end of the fifteenth resistor is electrically connected to the sixth pin of the first control chip; the first end of the eleventh capacitor is electrically connected to the sixth pin of the first control chip; the first end of the twenty-third resistor is electrically connected to the sixth pin of the first control chip; the second end of the eleventh capacitor and the second end of the twenty-third resistor are both grounded; The first end of the first capacitor is electrically connected to the second end of the second diode; the second end of the first capacitor is grounded; the second end of the first capacitor is electrically connected to the third end of the first triode; the second end of the first triode is electrically connected to the third end of the second diode; the first end of the first triode is electrically connected to the positive electrode of the third diode; the negative electrode of the third diode is electrically connected to the second end of the sixth resistor; the first end of the first triode is electrically connected to the second end of the seventh resistor; the first end of the seventh resistor is electrically connected to the first end of the sixth resistor; the third end of the first triode is electrically connected to the second end of the thirteenth resistor; the first end of the thirteenth resistor is electrically connected to the second end of the fifth capacitor; the first end of the ninth resistor is electrically connected to the first end of the first triode; the second end of the ninth resistor is electrically connected to the second end of the thirteenth resistor; the second end of the thirteenth resistor is electrically connected to the second end of the eighteenth resistor; the first end of the eighteenth resistor is electrically connected to the third pin of the first control chip; the first end of the sixth resistor is electrically connected to the eighth pin of the first control chip; The fifth pin of the first control chip is electrically connected to the first end of the seventeenth capacitor; the fifth pin of the first control chip is electrically connected to the first end of the twentieth resistor; the second end of the twentieth resistor is electrically connected to the first end of the sixteenth capacitor; the second end of the seventeenth capacitor and the second end of the sixteenth capacitor are both grounded; The first pin of the first control chip is grounded; the second pin of the first control chip is electrically connected to the first end of the fourteenth capacitor; the second pin of the first control chip is electrically connected to the first end of the twenty-first resistor; the second end of the fourteenth capacitor and the second end of the twenty-first resistor are both grounded; the first end of the twelfth capacitor is electrically connected to the seventh pin of the first control chip; the second end of the twelfth capacitor is grounded; The second end of the second diode and the seventh pin of the first control chip both serve as output ends of the boost module.

7. An instantaneous power switching power supply as claimed in claim 6, characterized in that: Also included is a resonant half-bridge feedback module; The resonant half-bridge feedback module includes: a 109th capacitor, a 100th photoelectric coupler, a 121st resistor, a 122nd resistor, a 133rd resistor, a 128th resistor, a 111th capacitor, a 124th resistor and a 101st voltage stabilizing diode; Wherein, the first end of the 122nd resistor is electrically connected to the first end of the 121st resistor; the second end of the 121st resistor is electrically connected to the first end of the 100th photoelectric coupler; the second end of the 122nd resistor is electrically connected to the first end of the 133rd resistor; the second end of the 133rd resistor is grounded; the first end of the 101st zener diode is electrically connected to the first end of the 133rd resistor; the third end of the 101st zener diode is grounded; the second end of the 101st zener diode is electrically connected to the second end of the 100th photoelectric coupler; The first end of the first 24th resistor is electrically connected to the second end of the first 21st resistor; the second end of the first 24th resistor is electrically connected to the second end of the first 101st voltage zener diode; the first end of the first 111th capacitor is electrically connected to the second end of the first 24th resistor; the second end of the first 111th capacitor is electrically connected to the first end of the first 28th resistor; the second end of the first 28th resistor is electrically connected to the second end of the first 22nd resistor; The first end of the 109th capacitor is electrically connected to the fourth end of the 100th photoelectric coupler; the second end of the 109th capacitor is electrically connected to the third end of the 100th photoelectric coupler; the second end of the 109th capacitor is grounded; The first end of the one hundred and twenty-second resistor is electrically connected to the first end of the tenth inductor; The fourth end of the first photoelectric coupler is electrically connected to the feedback input end of the resonant half-bridge voltage conversion module.

8. An instantaneous power switching power supply as claimed in claim 7, characterized in that: The resonant half-bridge voltage conversion module includes: a one-hundred-and-fifth resistor, a one-hundred-eleventh resistor, a one-hundred-twelfth resistor, a one-hundred-seventeenth resistor, a one-hundred-and-fourth capacitor, a one-hundred-and-sixth resistor, a one-hundred-and-eighth resistor, a one-hundred-diode, a one-hundred-and-nineth resistor, a one-hundred-and-fourth transistor, a one-hundred-and-eleventh resistor, a one-hundred-and-thirteenth resistor, a one-hundred-and-first diode, a one-hundred-and-fourteenth resistor, a one-hundred-and-sixth transistor, a one-hundred-inductor, a one-hundred-and-eighteenth capacitor, a one-hundred-and-twenty resistor, a one-hundred-and-sixth capacitor, a one-hundred-and-seventh capacitor, a one-hundred-and-eighth capacitor, a one-hundred-and-thirty resistor, a one-hundred-and-sixth resistor, a one-hundred-and-seventh capacitor, a one-hundred-and-eighth capacitor, a one-hundred-and-thirty resistor, a one-hundred-and-twenty-nine resistor, a one-hundred-and-thirty-two resistor, a one-hundred-and-thirty-four resistor, a one-hundred-and-fourth capacitor, a one-hundred-control chip, a one-hundred-and-fifth capacitor, a one-hundred-and-second diode, a one-hundred-tenth capacitor, a one-hundred-and-thirteenth resistor, a one-hundred-and-thirteenth capacitor, and a one-hundred-and Wherein, the second end of the 105th resistor is electrically connected to the first end of the 110th resistor; the second end of the 110th resistor is electrically connected to the first end of the 112th resistor; the second end of the 112th resistor is electrically connected to the first end of the 117th resistor; the second end of the 112th resistor is electrically connected to the first end of the 104th capacitor; the second end of the 117th resistor and the second end of the 104th capacitor are both grounded; The second end of the 104th transistor is electrically connected to the first end of the 105th resistor; the first end of the 104th transistor is electrically connected to the positive electrode of the 100th diode; the negative electrode of the 100th diode is electrically connected to the second end of the 106th resistor; the second end of the 108th resistor is electrically connected to the positive electrode of the 100th diode; the first end of the 108th resistor is electrically connected to the first end of the 106th resistor; the first end of the 109th resistor is electrically connected to the first end of the 104th transistor; the second end of the 109th resistor is electrically connected to the third end of the 104th transistor; the third end of the 104th transistor is electrically connected to the fourteenth pin of the 100th control chip; the first end of the 106th resistor is electrically connected to the fifteenth pin of the 100th control chip; The second end of the 106th transistor is electrically connected to the third end of the 104th transistor; the third end of the 106th transistor is grounded; the first end of the 106th transistor is electrically connected to the positive electrode of the 101st diode; the negative electrode of the 101st diode is electrically connected to the second end of the 111th resistor; the second end of the 113th resistor is electrically connected to the positive electrode of the 101st diode; the first end of the 113th resistor is electrically connected to the first end of the 111th resistor; the first end of the 111th resistor is electrically connected to the eleventh pin of the 100th control chip; the first end of the 114th resistor is electrically connected to the first end of the 106th transistor; the second end of the 114th resistor is electrically connected to the third end of the 106th transistor; The first end of the 100th inductor is electrically connected to the third end of the 104th transistor; the second end of the 100th inductor is electrically connected to the second end of the primary side of the 100th transformer; the first end of the primary side of the 100th transformer is electrically connected to the second end of the 118th capacitor; the first end of the 118th capacitor is grounded; The second pin of the 100th control chip is electrically connected to the second end of the 120th resistor; the second pin of the 100th control chip is electrically connected to the second end of the 106th capacitor; the third pin of the 100th control chip is electrically connected to the second end of the 107th capacitor; the first pin of the 100th control chip is electrically connected to the second end of the 108th capacitor; the fifth pin of the 100th control chip is electrically connected to the first end of the 114th capacitor; the fourth pin of the 100th control chip is electrically connected to the first end of the 130th resistor; The first end of the 120th resistor, the first end of the 106th capacitor, the first end of the 107th capacitor, the first end of the 108th capacitor, the second end of the 114th capacitor and the second end of the 130th resistor are all grounded; The second end of the 129th resistor is electrically connected to the first pin of the 100th control chip; the first end of the 129th resistor is electrically connected to the first end of the 131st resistor; the second end of the 131st resistor is electrically connected to the first end of the 134th resistor; the first end of the 132nd resistor is electrically connected to the first end of the 134th resistor; the second end of the 132nd resistor is electrically connected to the fifth pin of the 100th control chip; The first end of the 110th capacitor is electrically connected to the 16th pin of the 100th control chip; the second end of the 110th capacitor is electrically connected to the 14th pin of the 100th control chip; the second end of the 105th capacitor is grounded; the first end of the 105th capacitor is electrically connected to the 12th pin of the 100th control chip; the anode of the 102nd diode is electrically connected to the first end of the 105th capacitor; the cathode of the 102nd diode is electrically connected to the 16th pin of the 100th control chip; The first end of the 125th resistor is electrically connected to the second end of the 103rd capacitor; the second end of the 125th resistor is electrically connected to the first end of the 113th capacitor; the second end of the 113th capacitor is electrically connected to the positive electrode of the 103rd diode; the negative electrode of the 103rd diode is electrically connected to the sixth pin of the 100th control chip; the first end of the 135th resistor is electrically connected to the sixth pin of the 100th control chip; the first end of the 115th capacitor is electrically connected to the sixth pin of the 100th control chip; the negative electrode of the 104th diode is electrically connected to the positive electrode of the 103rd diode; the tenth pin of the 100th control chip, the second end of the 135th resistor, the second end of the 115th capacitor and the positive electrode of the 104th diode are all grounded; the seventh pin of the 100th control chip is electrically connected to the first end of the 104th capacitor; The seventh pin of the first one hundred control chip serves as the control end of the resonant half-bridge voltage conversion module, and is electrically connected to the fourth end of the first one hundred and one photoelectric coupler; the first end of the first one hundred and five capacitors is electrically connected to the seventh pin of the first control chip; the second end of the first one hundred and thirty-four resistors is electrically connected to the fourth end of the first one hundred photoelectric couplers; the first end of the first one hundred and five resistors is electrically connected to the second end of the second diode; The third end, the fourth end and the fifth end of the secondary side of the 100th transformer all serve as the output end of the resonant half-bridge voltage conversion module, wherein the third end of the secondary side of the 100th transformer is electrically connected to the second end of the 104th resistor; the fifth end of the secondary side of the 100th transformer is electrically connected to the second end of the 118th resistor; and the fourth end of the secondary side of the 100th transformer is electrically connected to the first end of the tenth inductor.

9. An instantaneous power switching power supply as claimed in claim 2, characterized in that: The auxiliary power supply module includes: a nineteenth capacitor, a thirty-third resistor, a thirty-sixth resistor, a forty-first resistor, a forty-second capacitor, a forty-ninth resistor, a forty-third capacitor, a twenty-seventh capacitor, a thirty-first resistor, a seventh diode, a twenty-second diode, a fifty-fifth capacitor, a tenth diode, a fifty-sixth resistor, a fortieth capacitor, a fifty-second resistor, a sixty-first resistor, a sixty-fourth resistor, a thirty-ninth capacitor, a sixty-second resistor, a sixty-third resistor, a second triode, an eleventh diode, a thirty-first capacitor, a fifty-eighth resistor, a twenty-ninth resistor, a third photocoupler, a sixtieth resistor, a sixty-fifth resistor, a seventieth resistor, a thirty-seventh capacitor, a forty-eighth resistor, a fifty-fifth resistor, a twenty-sixth capacitor and a first transformer, a fifth voltage-stabilizing diode and a third control chip; Wherein, the second end of the nineteenth capacitor is grounded; the first end of the thirty-third resistor is electrically connected to the first end of the nineteenth capacitor; the second end of the thirty-third resistor is electrically connected to the first end of the thirty-sixth resistor; the second end of the thirty-sixth resistor is electrically connected to the first end of the forty-first resistor; the second end of the forty-first resistor is electrically connected to the first end of the forty-second capacitor; the second end of the forty-second capacitor is electrically connected to the fifth pin of the third control chip; the second end of the forty-second capacitor is grounded; The first end of the twenty-seventh capacitor is electrically connected to the first end of the nineteenth capacitor; the second end of the twenty-seventh capacitor is electrically connected to the cathode of the seventh diode; the first end of the thirty-first resistor is electrically connected to the first end of the nineteenth capacitor; the second end of the thirty-first resistor is electrically connected to the cathode of the seventh diode; the first end of the primary coil of the first transformer is electrically connected to the first end of the nineteenth capacitor; the second end of the primary coil of the first transformer is electrically connected to the anode of the seventh diode; The anode of the 22nd diode is electrically connected to the third end of the primary coil of the first transformer; the cathode of the 22nd diode is electrically connected to the first end of the 55th capacitor; the second end of the 55th capacitor is grounded; the cathode of the 22nd diode is electrically connected to the anode of the 10th diode; the cathode of the 10th diode is electrically connected to the second end of the 41st resistor; the fourth end of the primary coil of the first transformer is grounded; The sixth pin of the third control chip is electrically connected to the first end of the sixty-fourth resistor; the first end of the sixty-first resistor is electrically connected to the first end of the second triode; the second end of the sixty-first resistor is electrically connected to the first end of the sixty-second resistor; the second end of the sixty-fourth resistor is electrically connected to the first end of the sixty-third resistor; the second end of the sixty-fourth resistor is electrically connected to the first end of the sixty-second resistor; the second end of the sixty-third resistor and the second end of the sixty-second resistor are both grounded; the first end of the thirty-ninth capacitor is electrically connected to the first end of the sixty-fourth resistor; the second end of the thirty-ninth capacitor is grounded; the fourth pin of the third control chip is electrically connected to the first end of the fifty-sixth resistor; the second end of the fifty-sixth resistor is electrically connected to the first end of the second triode; The second end of the second triode is electrically connected to the second end of the primary coil of the first transformer; the third end of the second triode is electrically connected to the first end of the sixty-third resistor; the third pin of the third control chip is electrically connected to the first end of the fortieth capacitor; the second end of the fortieth capacitor is grounded; the first end of the fortieth capacitor is electrically connected to the first end of the fifty-second resistor; the second end of the fifty-second resistor is electrically connected to the first end of the sixty-fourth resistor; the seventh pin of the third control chip is electrically connected to the first end of the forty-ninth resistor; the second end of the forty-ninth resistor is grounded; the eighth pin of the third control chip is electrically connected to the first end of the forty-third capacitor; the second end of the forty-third capacitor is grounded; the second pin of the third control chip is electrically connected to the negative electrode of the tenth diode; The first end of the secondary coil of the first transformer is electrically connected to the positive electrode of the eleventh diode; the negative electrode of the eleventh diode is electrically connected to the first end of the thirty-first capacitor; the second end of the thirty-first capacitor is grounded; the second end of the secondary coil of the first transformer is grounded; the first end of the fifty-eighth resistor is electrically connected to the negative electrode of the eleventh diode; the second end of the fifty-eighth resistor is grounded; The first end of the twenty-ninth resistor is electrically connected to the cathode of the eleventh diode; the second end of the twenty-ninth resistor is electrically connected to the first end of the third photoelectric coupler; the first end of the sixtieth resistor is electrically connected to the cathode of the eleventh diode; the second end of the sixtieth resistor is electrically connected to the second end of the sixty-fifth resistor; the first end of the sixty-fifth resistor is electrically connected to the second end of the thirty-seventh capacitor; the first end of the thirty-seventh capacitor is electrically connected to the second end of the third photoelectric coupler; the first end of the third photoelectric coupler is electrically connected to the first end of the forty-eighth resistor; the second end of the forty-eighth resistor is electrically connected to the first end of the thirty-seventh capacitor; the second end of the fifth voltage-stabilizing diode is electrically connected to the first end of the thirty-seventh capacitor; the first end of the fifth voltage-stabilizing diode is electrically connected to the second end of the sixty-fifth resistor; the third end of the fifth voltage-stabilizing diode is grounded; the first end of the seventieth resistor is grounded; the second end of the seventieth resistor is electrically connected to the first end of the fifth voltage-stabilizing diode; The fourth end of the third photoelectric coupler is electrically connected to the first pin of the third control chip; the fourth end of the third photoelectric coupler is electrically connected to the first end of the fifty-fifth resistor; the second end of the fifty-fifth resistor is electrically connected to the first end of the twenty-sixth capacitor; the second end of the twenty-sixth capacitor is grounded; the third end of the third photoelectric coupler is grounded; The anode of the tenth diode is connected to the input end of the auxiliary power supply module, which is electrically connected to the output end of the boost module; the first end of the nineteenth capacitor is connected to the input end of the auxiliary power supply module, which is electrically connected to the output end of the boost module; The cathode of the eleventh diode serves as the output end of the auxiliary power supply module, and the cathode of the eleventh diode is electrically connected to the power supply input end of the current limiting delay module, and is also electrically connected to the power supply input end of the output synchronous rectification module.

10. An instantaneous power switching power supply as claimed in claim 8, characterized in that: The regulating the resonant half-bridge voltage conversion module according to the output direct current current specifically includes: Obtaining a voltage at a third terminal of the first operational amplifier according to the current of the output direct current; When the voltage at the third terminal of the first operational amplifier is greater than the voltage at the second terminal of the first operational amplifier, the voltage at the first terminal of the first operational amplifier changes from a low level to a high level to charge the first one hundred and nineteenth capacitor; The voltage at the sixth terminal of the second operational amplifier is determined according to the first-hundred-nineteenth capacitor. When the voltage at the sixth terminal of the second operational amplifier is greater than the voltage at the fifth terminal of the second operational amplifier, the voltage at the seventh terminal of the second operational amplifier changes from a high level to a low level, so that the first-hundred-one photocoupler is turned on, and the voltage at the fourth terminal of the first-hundred-one photocoupler is pulled down, thereby causing the first-hundred-one control chip to stop working.

Images