Power module, totem column power factor correction circuit and control circuit thereof

Abstract

The embodiment of the application provides a power module, a totem column power factor correction circuit and a control circuit thereof. The control circuit controls the main power tube in the totem column power factor correction circuit to turn on and turn off, and controls the auxiliary power tube to keep off, when the phase value of the instantaneous voltage of the input voltage of the totem column power factor correction circuit is in a predetermined phase interval and the absolute value of the voltage value is less than a predetermined voltage value. The embodiment of the application can avoid the situation that the voltage values of the input voltage are low and the voltages on both sides of the auxiliary power tube are not turned on at the same time, reduces the switching loss, and improves the working efficiency of the totem column power factor correction circuit and the power module.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a power supply module, a totem pole power factor correction circuit and its control circuit. Background Technology

[0002] The power module includes a totem-pole power factor correction circuit, a DC-DC converter circuit, and a control circuit. The totem-pole power factor correction circuit receives AC power and provides input voltage to the DC-DC converter circuit. This circuit includes at least one switching transistor and at least one inductor. The control circuit controls the switching on and off of the transistor, causing the inductor to charge and discharge alternately. This alternating charging and discharging of the inductor rectifies the AC power and provides input voltage to the DC-DC converter circuit. By adjusting the charging and discharging times of the inductor, the control circuit can adjust the power factor provided by the power factor correction circuit, thereby improving the power efficiency of the power module. When the peak input voltage of the totem-pole power factor correction circuit is low, the energy stored in the inductor after charging is low, and the voltage supplied by the inductor to the switching transistor is low. If the control circuit turns on the transistor at this time, it will cause a forced turn-on due to the different voltages on both sides of the transistor, increasing the switching losses of the power factor correction circuit.

[0003] Therefore, how to avoid hard-turning of the switching transistor in the totem pole power factor correction circuit is a technical problem that needs to be solved in this field. Summary of the Invention

[0004] This application provides a power module, a totem pole power factor correction circuit, and a control circuit thereof.

[0005] This application provides a totem-pole power factor correction circuit, including a control circuit and a half-bridge circuit. The half-bridge circuit includes a main power transistor and an auxiliary power transistor. The totem-pole power factor correction circuit receives an input voltage and provides an output voltage, while the control circuit outputs a control signal to the half-bridge circuit. Specifically, in response to the input voltage's phase value being within a predetermined phase interval and the absolute value of the input voltage being less than a predetermined voltage value, the main power transistor turns on and off according to the control signal, while the auxiliary power transistor remains off according to the control signal. Therefore, when the instantaneous phase value of the input voltage of the totem-pole power factor correction circuit is within the predetermined phase interval and the absolute value of the voltage is less than the predetermined voltage value, the main power transistor in the half-bridge circuit turns on and off, and controls the auxiliary power transistor to remain off. This avoids the auxiliary power transistor from turning on simultaneously when the instantaneous input voltage is low due to voltage differences across it, thereby reducing the switching losses of the auxiliary power transistor in the totem-pole power factor correction circuit and improving the operating efficiency of the totem-pole power factor correction circuit and its associated power supply module.

[0006] In one embodiment of the first aspect of this application, when the phase value of the input voltage is not within a predetermined phase range, the main power transistor and the auxiliary power transistor are alternately turned on and off according to a control signal. Therefore, when the instantaneous phase value of the input voltage of the totem-pole power factor correction circuit is not within the predetermined phase range, the main power transistor and the auxiliary power transistor in the half-bridge circuit are alternately turned on and off. Especially when the phase value of the input voltage is not within the preset range, the alternating on / off of the auxiliary power transistor and the main power transistor ensures that the main power transistor performs bootstrap charging, thus ensuring the normal operation of the totem-pole power factor correction circuit.

[0007] In one embodiment of the first aspect of this application, when the absolute value of the input voltage is greater than or equal to a predetermined voltage value, the main power transistor and the auxiliary power transistor are alternately turned on and off according to the control signal, thereby ensuring the normal operation of the totem pole power factor correction circuit.

[0008] In one embodiment of the first aspect of this application, the predetermined phase interval includes a phase of 0-180 degrees and a phase of 270-360 degrees. Specifically, when the phase value of the input voltage is 180-270 degrees, the alternating turn-on of the auxiliary power transistor and the main power transistor ensures that the main power transistor performs bootstrap charging, thus guaranteeing the normal operation of the totem-pole power factor correction circuit.

[0009] In one embodiment of the first aspect of this application, the predetermined voltage value can be set to k times the peak voltage of the output voltage provided by the totem-pole power factor correction circuit. k is a constant greater than 0 and less than 1. The predetermined voltage value provided in this application embodiment can be preset, pre-set, or adjusted by the control circuit according to different situations, thereby increasing control flexibility.

[0010] A second aspect of this application provides a control circuit for a totem pole power factor correction circuit, which includes a control circuit, a main power transistor, and an auxiliary power transistor. The control circuit responds to the input voltage's phase value being within a predetermined phase interval and the absolute value of the input voltage being less than a predetermined voltage value by controlling the main power transistor to turn on and off, and controlling the auxiliary power transistor to remain off.

[0011] In one embodiment of the second aspect of this application, the control circuit is further configured to: control the main power transistor and the auxiliary power transistor to alternately turn on and off in response to the phase value of the input voltage not being within a predetermined phase range.

[0012] In one embodiment of the second aspect of this application, the control circuit is further configured to: control the main power transistor and the auxiliary power transistor to alternately turn on and off in response to the input voltage value being greater than or equal to a pre-set voltage value.

[0013] In one embodiment of the second aspect of this application, the predetermined phase interval includes: 0 degrees-180 degrees and 270 degrees-360 degrees.

[0014] In one embodiment of the second aspect of this application, the predetermined voltage value is k times the peak voltage of the output voltage, where k is greater than 0 and less than 1.

[0015] A third aspect of this application provides a totem-pole power factor correction circuit, comprising: a half-bridge circuit and a control circuit; the half-bridge circuit includes: a main power transistor and an auxiliary power transistor; the totem-pole power factor correction circuit is used to receive an input voltage and provide an output voltage, and the control circuit is used to output a control signal to the half-bridge circuit. The main power transistor and the auxiliary power transistor alternately turn on and off according to the control signal. The duration of each turn-on of the main power transistor is negatively correlated with the absolute value of the input voltage. Therefore, when the input voltage is low, the conduction time of the main power transistor is longer, increasing the duration for the input voltage to charge the inductor, thereby increasing the energy of the inductor after charging. Ultimately, the voltage value provided by the inductor to the auxiliary power transistor is increased, which can avoid the auxiliary power transistor turning on simultaneously when the voltages on both sides of the auxiliary power transistor are not the same during these times. Therefore, this embodiment can reduce the switching loss of the auxiliary power transistor in the totem-pole power factor correction circuit 111 and improve the working efficiency of the totem-pole power factor correction circuit 111 and the power supply module 11 in which it is located. Furthermore, it does not improve the structure of the existing totem pole power factor correction circuit 111, and it also has the advantages of simple circuit structure and low cost.

[0016] In one embodiment of the third aspect of this application, the turn-on duration of the main power transistor is n times a preset turn-on duration, where n is negatively correlated with the absolute value of the input voltage. The method for determining the turn-on duration of the main power transistor provided in this embodiment is relatively simple and easy to implement.

[0017] The fourth aspect of this application provides a control circuit for a totem pole power factor correction circuit, the totem pole power factor correction circuit including a main power transistor and an auxiliary power transistor; the control circuit is used to control the main power transistor and the auxiliary power transistor to alternately turn on and off; the duration of each turn-on of the main power transistor is negatively correlated with the absolute value of the input voltage.

[0018] In one embodiment of the fourth aspect of this application, the duration for which the main power transistor is turned on each time is n times the preset duration for which the main power transistor is turned on each time, and n is negatively correlated with the absolute value of the input voltage.

[0019] This application provides a power supply module for acquiring an input voltage and supplying power to a load. The power supply module includes a DC-DC converter circuit and a totem-pole power factor correction circuit as provided in any of the first or third aspects of this application. The totem-pole power factor correction circuit acquires the input voltage and provides an output voltage. The DC-DC converter circuit performs voltage conversion on the output voltage and then supplies power to the load. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0022] Figure 2 A schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of a power module provided in an embodiment of this application;

[0024] Figure 4 This application provides a schematic diagram of the structure of a power module;

[0025] Figure 5 This is a schematic diagram of the control logic of a totem pole power factor correction circuit.

[0026] Figure 6 A control logic diagram of a control circuit for a totem pole power factor correction circuit provided in this application;

[0027] Figure 7 A schematic diagram of another circuit structure for the totem pole power factor correction circuit provided in this application;

[0028] Figure 8 This application provides a schematic diagram of the structure of a power module;

[0029] Figure 9 This application provides a schematic diagram of the control logic of a totem pole power factor correction circuit. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] The connection relationships described in this application refer to direct or indirect connections. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components. For instance, A could be directly connected to C, and C could be directly connected to B, thus achieving a connection between A and B through C. It is also understood that the "A connecting to B" described in this application can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0033] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. For example... Figure 1 As shown, electronic device 1 includes a power supply module 11 and a load 12. The power supply module 11 is used to receive an input voltage V. in and provides output voltage V out Power is supplied to load 12. In one embodiment, the input voltage V... in It can be powered by an external power source, or it can be powered by the internal power source of electronic device 1.

[0034] like Figure 1 The electronic device 1 provided in the illustrated embodiment can be a mobile phone, laptop computer, computer case, television, smart tablet, interactive flat panel, electric vehicle, smart home device, smartwatch, or wearable device, etc. The power module provided in this application embodiment can be applied to, for example... Figure 1 In the electronic device 1 shown.

[0035] Figure 2 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. For example... Figure 2 As shown, the electronic device 1 includes a power supply module 11. The power supply module 11 is used to receive the input voltage V. in and provides output voltage V out This supplies power to the load subsequently connected to electronic device 1. In one embodiment, the input voltage Vin It can be powered by an external power source, or it can be powered by the internal power source of electronic device 1.

[0036] like Figure 2 The electronic device 1 provided in this embodiment can be a power adapter, charger, car charging station, power bank, or other power supply equipment. The power module provided in this embodiment can be applied to, for example... Figure 2 In the electronic device 1 shown.

[0037] In one embodiment of this application, the electronic device 1 may further include a plurality of power modules 11, which provide an output voltage V. out Power is supplied to load 12. In one embodiment of this application, electronic device 1 may include multiple loads 12, and power module 11 provides multiple output voltages V. out The power supply modules 11 and loads 12 are respectively powered by multiple loads 12. In one embodiment of this application, the electronic device 1 may include multiple power supply modules 11 and multiple loads 12, with the multiple power supply modules 11 respectively providing multiple output voltages V. out Powers multiple loads 12.

[0038] In one embodiment of this application, the input voltage V in The power supply can be alternating current, and the power module 11 may include an AC / DC conversion circuit. In this embodiment, the input voltage V... in The power supply can be direct current (DC), and the internal power supply may include an energy storage device. The power module 11 may include a DC-DC converter circuit. Accordingly, when the electronic device 1 is operating independently, the energy storage device of the internal power supply can supply power to the power module 11.

[0039] In one embodiment of this application, the input voltage V in The power supply can be direct current (DC). The load 12 of the electronic device 1 can include one or more of a power-consuming device, an energy storage device, or an external device. In one embodiment, the load 12 can be a power-consuming device of the electronic device 1, such as a processor, a display, etc. In one embodiment, the load 12 can be an energy storage device of the electronic device 1, such as a battery. In one embodiment, the load 12 can be an external device of the electronic device 1, such as a display, a keyboard, or other electronic devices.

[0040] Figure 3 This is a schematic diagram of a power module provided in an embodiment of this application, such as... Figure 3 The power module 11 shown can be applied to, for example Figure 1 or Figure 2 In electronic device 1, the power module 11 includes a totem-pole power factor correction (PFC) circuit 111 and a DC-DC converter circuit 112. The power module 11 is used to receive the input voltage V.in After power factor correction, the output voltage V is provided. out Input voltage V in It is alternating current, and the output voltage is V. out It is direct current.

[0041] The totem pole power factor correction circuit 111 is used to receive the input voltage V of the power supply module 11. in The input voltage V of power module 11 in After rectification and power factor correction, an output voltage V1 is provided to the DC-DC converter 112. The output voltage V1 of the totem pole power factor correction circuit 111 is DC. The output voltage V1 of the totem pole power factor correction circuit 111 is the same as the input voltage V of the totem pole power factor correction circuit 111. in The phase and other circuit parameters are different. In one embodiment, the input voltage V of the totem pole power factor correction circuit 111 is... in The voltage value of the input voltage and the output voltage V1 of the totem pole power factor correction circuit 111 can be equal. Alternatively, the input voltage V of the totem pole power factor correction circuit 111 can be equal. in The voltage value is greater than the output voltage V1 of the totem pole power factor correction circuit 111.

[0042] DC-DC converter 112 receives the output voltage V1 from totem pole power factor correction circuit 111, performs voltage conversion on the output voltage V1, and provides the output voltage V of power module 11. out The DC-DC converter circuit 112 can be a circuit with isolation function, such as an asymmetrical half-bridge (AHB) flyback converter circuit or an active clamp flyback (ACF) converter circuit. Alternatively, the DC-DC converter circuit 112 can also be a circuit with non-isolation function, such as a boost circuit, a buck circuit, or a buck-boost circuit.

[0043] The totem pole power factor correction circuit 111 includes a control circuit, at least one inductor, and at least one switching transistor. The control circuit sends a control signal to the at least one switching transistor, causing it to turn on or off according to the control signal, thereby controlling the charging or discharging of the at least one inductor through the turned-on switching transistor. When the at least one inductor is charging, the input voltage V of the totem pole power factor correction circuit 111... inAt least one inductor is charged. When at least one inductor discharges, at least one inductor provides an output voltage V1 to the DC-DC converter circuit 112. The control circuit can adjust the power factor of the output voltage of the totem pole power factor correction circuit 111 by adjusting the charging time and / or discharging time of at least one capacitor.

[0044] In one embodiment, the control circuit of the totem pole power factor correction circuit 111 can be a pulse-width modulation (PWM) controller, a central processing unit (CPU), other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, etc.

[0045] In one embodiment, the switching transistor of the totem pole power factor correction circuit 111 can be any one of a metal-oxide-semiconductor field-effect transistor (MOSFET), an insulated gate bipolar transistor (IGBT), a bipolar power transistor, or a wide bandgap semiconductor field-effect transistor.

[0046] In one embodiment, the switching transistor is driven by a high-level signal to turn it on and a low-level signal to turn it off. For example, the control circuit sends a high-level control signal to the switching transistor, and the switching transistor turns on according to the control signal. Alternatively, the control circuit sends a low-level control signal to the switching transistor, and the switching transistor turns off according to the control signal. Or, the control circuit does not send a control signal to the switching transistor, and the switching transistor turns off when it does not receive a control signal. It is understood that other driving methods can also be used for the switching transistor in the embodiments of this application, and the embodiments of this application do not limit the driving method of the switching transistor.

[0047] Figure 4 This is a schematic diagram of a power supply module provided in this application. Figure 4 The power module shown includes a totem-pole power factor correction circuit 111 and a DC-DC converter circuit 112. The totem-pole power factor correction circuit 111 is used to receive the input voltage V. inAfter rectification and power factor correction, it provides output voltage V1 to DC-DC converter circuit 112.

[0048] Figure 4 The totem pole power factor correction circuit 111 provided herein is an example of a bridgeless totem pole power factor correction circuit. The totem pole power factor correction circuit 111 includes: an inductor L, a first switch S. L Second switch S H Third switch Q L and the fourth switch Q H Among them, the first switch S L Second switch S H A half-bridge circuit 1111a is formed by connecting the two circuits in series. The midpoint A of the bridge arm of the half-bridge circuit 1111a is connected to the input voltage V. in The negative terminal of the half-bridge circuit 1111a is also connected in parallel between the a and b terminals of the output of the totem pole power factor correction circuit 111. The third switch Q... L and the fourth switch Q H A series connection forms a half-bridge circuit 1111b. The midpoint B of the bridge arm of the half-bridge circuit 1111b is connected to one end of the inductor L, and the other end of the inductor L is connected to the input voltage V. in The positive terminal, half-bridge circuit 1111b, is also connected in parallel between interface a and interface b of the output terminal of totem pole power factor correction circuit 111.

[0049] Control circuit 1112 is used to control the first switch S L Send the first control signal G SL First switch S L According to the first control signal G SL Turn on. Control circuit 1112 is used to control the second switch S. H Send the second control signal G SH Second switch S H According to the second control signal G SH Turn on. Control circuit 1112 is used to control the third switch Q. L Send the third control signal G QL The third switch Q L According to the third control signal G QL Turn on. Control circuit 1112 is used to control the fourth switch Q. H Send the fourth control signal G QH The fourth switch Q H According to the fourth control signal G QH It is now open.

[0050] Figure 5 This is a schematic diagram of the control logic of a totem pole power factor correction circuit. The following is a combination of... Figure 4 The totem pole power factor correction circuit 111 provided in the middle is for... Figure 5 The control logic within will be explained.

[0051] At time t1, the totem pole power factor correction circuit 111 receives the input voltage V. in The voltage value starts to increase from 0. Control circuit 1112 sends a signal to the first switch S. L Send the first control signal G SL , causing the first switch S L According to the first control signal G SL Activated. Simultaneously, the second switch S... H Turn off. Between time t1 and time t6, the input voltage V... in If all voltage values ​​are positive, then control circuit 1112 continuously supplies power to the first switch S. L Send the first control signal G SL , causing the first switch S L Continuously open, second switch S H Continue to shut down.

[0052] Before time t2, due to the input voltage V in The voltage value is low, and some control circuits 1112 provide low-voltage protection for the totem pole power factor correction circuit 111. Specifically, when the input voltage V received by the totem pole power factor correction circuit 111 is low... in When the voltage value is less than V0, the control circuit 1112 does not send a signal to the third switch Q. L Send the third control signal G QL Do not switch Q H Send the fourth control signal G QH The third switch Q L and the fourth switch Q H Turn off.

[0053] After time t2, the input voltage V received by the totem pole power factor correction circuit 111 is... in When the voltage value is greater than V0, control circuit 1112 controls the third switch Q. L and the fourth switch Q H Alternating switching causes capacitor L to alternately pass through the third switch Q. L Charging and via the fourth switch Q H Discharge. Specifically, between time t1 and t6, the third switch Q is used for charging capacitor L. L Let Q be the main power transistor and the fourth switch used to discharge capacitor L. H This is designated as the auxiliary power transistor.

[0054] For example, t after time t2 21 At that moment, control circuit 1112 sends a signal to the third switch Q. L Send the third control signal GQL Make the third switch Q L According to the third control signal G QL Activated. Simultaneously, the fourth switch Q... H Turn off. At this time, the input voltage V in Through inductor L and third switch Q L and the first switch S L When an inductor L is charged, the current i flowing through the inductor L is... L Gradually increase.

[0055] Control circuit 1112 directs to the third switch Q L Send the third control signal G QL After continuing for the first preset duration T1, at t 22 At that moment, control circuit 1112 stops sending power to the third switch Q. L Send the third control signal G QL The third switch Q L Off, fourth switch Q H Off, input voltage V in Stop charging inductor L.

[0056] In t 22 t after time 23 At that moment, control circuit 1112 sends a signal to the fourth switch Q. H Send the fourth control signal G QH This makes the fourth switch Q H According to the fourth control signal G QH Turn on, third switch Q L Turn off. At this time, inductor L passes through the fourth switch Q. H The output terminals a and b of the totem pole power factor correction circuit 111 and the first switch S L Discharge, thereby providing output voltage V1 to DC-DC converter circuit 112. The fourth switch Q... H Taking a MOSFET as an example, the discharge current of inductor L flows between the source and drain of the MOSFET.

[0057] Control circuit 1112 directs to the fourth switch Q H Send the fourth control signal G QH After continuing for the second preset duration T2, at t 24 At that moment, control circuit 1112 stops sending power to the fourth switch Q. H Send the fourth control signal G QH The third switch Q L Off, fourth switch Q H When switched off, inductor L stops passing through the fourth switch Q. H The source and drain discharge.

[0058] After time t5, the input voltage V received by the totem pole power factor correction circuit 111 is... in When the voltage value is less than V0, the control circuit 1112 does not send a signal to the third switch Q. L Send the third control signal G QL Do not switch Q H Send the fourth control signal G QH The third switch Q L and the fourth switch Q H Turn off.

[0059] At time t6, the input voltage V received by the totem pole power factor correction circuit 111 is... in The voltage value decreases from 0. Control circuit 1112 sends a signal to the second switch S. H Send the second control signal G SH Make the second switch S L According to the second control signal G SH Activated. Simultaneously, the first switch S... L Shutdown. After time t6, t 11 Before time, the input voltage V in If all voltage values ​​are negative, then control circuit 1112 continuously supplies power to the second switch S. H Send the second control signal G SH Make the second switch S H Continuously open, first switch S L Continue to shut down.

[0060] The input voltage V received by the totem pole power factor correction circuit 111 after time t6 and before time t7 is... in When the voltage value is less than V0, the control circuit 1112 does not send a signal to the third switch Q. L Send the third control signal G QL Do not switch Q H Send the fourth control signal G QH The third switch Q L and the fourth switch Q H Turn off.

[0061] After time t7, the input voltage V received by the totem pole power factor correction circuit 111 is... in When the voltage value is greater than V0, control circuit 1112 controls the third switch Q. L and the fourth switch Q H Alternating switching causes capacitor L to alternately pass through the fourth switch Q. H Charging and via the third switch Q L Discharge. Specifically, at time t6 - t 11 Between moments, the fourth switch Q used for charging capacitor L HLet Q be the main power transistor and the third switch used to discharge capacitor L. L This is designated as the auxiliary power transistor.

[0062] For example, t after time t7 71 time-t 72 At that moment, control circuit 1112 sends a signal to the fourth switch Q. H Send the fourth control signal G QH Make the fourth switch Q H According to the fourth control signal G QH Activated. Simultaneously, the third switch Q... L Off. Input voltage V in Through the second switch S H Fourth switch Q H When an inductor L is charged, the current i flowing through the inductor L is... L Gradually increasing. At t 72 t after time 73 time-t 74 At that moment, control circuit 1112 sends a signal to the third switch Q. L Send the third control signal G QL Make the third switch Q L According to the third control signal G QL Activated. Simultaneously, the fourth switch Q... H Off. Inductor L passes through the third switch Q. L Output terminals b and a of the power factor correction circuit 112, and the second switch S H The output voltage V1 is provided to the DC-DC converter circuit 112.

[0063] In t 10 After a certain time, the totem pole power factor correction circuit 111 receives the input voltage V. in When the voltage value is less than V0, the control circuit 1112 does not send a signal to the third switch Q. L Send the third control signal G QL Do not switch Q H Send the fourth control signal G QH The third switch Q L and the fourth switch Q H Turn off.

[0064] It is understandable that the totem pole power factor correction circuit 111 receives the input voltage V. in It changes periodically. Therefore, within each cycle, control circuit 1112 can adjust according to... Figure 5 The control logic shown between time t1 and time t11 controls the totem pole power factor correction circuit 111.

[0065] However, if the totem pole power factor correction circuit 111 receives an input voltage V in Peak voltage V max If the smaller value is, then it occurs between time t1 and t3, between time t4 and t8, and between time t9 and t... 11 At any given moment, after the control circuit 1112 controls the main power transistor to turn on, the input voltage V... in The charging voltage and current for inductor L are relatively low. Subsequently, when control circuit 1112 turns off the main power transistor, the energy stored in inductor L is relatively small. Therefore, before control circuit 1112 turns on the auxiliary power transistor, the energy stored in inductor L is insufficient to resonate the voltage at the midpoint B of the second half-bridge circuit to a higher value. The voltage provided by the midpoint B of the second half-bridge circuit is lower than the output voltage V1 provided by the totem-pole power factor correction circuit 111 to the DC-DC converter circuit 112. This ultimately results in a voltage difference between the two sides of the auxiliary power transistor when control circuit 1112 turns it on, causing a "hard turn-on" of the auxiliary power transistor, which in turn increases the switching losses of the auxiliary power transistor and affects the operating efficiency of the totem-pole power factor correction circuit 111 and its associated power module 11.

[0066] In some existing technologies, the totem pole power factor correction circuit 111 also includes multiple auxiliary inductors, which are connected in parallel with the inductor L. Then the input voltage V... in It can charge inductor L and multiple auxiliary inductors simultaneously, even with an input voltage V. in The voltage value is relatively low, but multiple inductors can simultaneously resonate the voltage value at the midpoint B of the second half-bridge circuit to a higher voltage value. This ensures that when the control circuit 1112 controls the auxiliary power transistor to turn on, the voltages on both sides of the auxiliary power transistor are the same. However, this prior art requires more inductors in the totem-pole power factor correction circuit 111, increasing the complexity of the circuit structure. Furthermore, the large surface area of ​​the inductors significantly occupies space, hindering the miniaturization design and power density improvement of power supplies and electronic devices.

[0067] This application provides a power supply module, a totem pole power factor correction circuit, and a control circuit thereof to solve the above-mentioned problems. Figure 5 The control circuit 1112 of the totem pole power factor correction circuit 111 addresses the issue of hard turn-on of the auxiliary power transistor during control. This improvement reduces switching losses, enhances the efficiency of the totem pole power factor correction circuit 111 and its associated power module 11, and also offers advantages such as simple circuit structure and low cost. Specific embodiments of this application will be described in detail below. These specific embodiments can be combined with each other; similar or identical concepts or processes may not be repeated in some embodiments.

[0068] Figure 6 This application provides a schematic diagram of the control logic for a totem pole power factor correction circuit. (See attached diagram.) Figure 6 The control logic shown can be applied to, for example... Figure 4 In the power module 11 shown, the control circuit 1112 in the totem pole power factor correction circuit 111 controls the half-bridge circuit 111b. The following section will combine... Figure 4 The power factor correction circuit provided in the embodiment of this application is for the purpose of correcting the power factor correction circuit provided in the embodiment of this application. Figure 6 The control logic within will be explained.

[0069] At time t1, the totem pole power factor correction circuit 111 receives the input voltage V. in The voltage value starts to increase from 0. Control circuit 1112 sends a signal to the first switch S. L Send the first control signal G SL , causing the first switch S L According to the first control signal G SL Activated. Simultaneously, the second switch S... H Turn off. Between time t1 and time t6, the input voltage V... in If all voltage values ​​are positive, then control circuit 1112 continuously supplies power to the first switch S. L Send the first control signal G SL , causing the first switch S L Continuously open, second switch S H Continuously off. Between time t1 and t6, the third switch Q, used for charging capacitor L, is... L Let Q be the main power transistor and the fourth switch used to discharge capacitor L. H This is designated as the auxiliary power transistor.

[0070] The input voltage V received by the totem pole power factor correction circuit 111 after time t1 and before time t2. in When the voltage value is less than V0, the control circuit 1112 does not send a signal to the third switch Q. L Send the third control signal G QL Do not switch Q H Send the fourth control signal G QH The third switch Q L and the fourth switch Q H Turn off.

[0071] The input voltage V received by the totem pole power factor correction circuit 111 after time t2 and before time t3 is... in The voltage value is greater than V0 and less than the predetermined voltage value V. Y Control circuit 1112 controls the third switch Q LAlternately turn on and off, and control the fourth switch Q. H Turn off.

[0072] In one embodiment, between time t2 and time t3, in response to the input voltage V in The absolute value of the voltage is greater than V0 and less than the predetermined voltage value V. Y And the input voltage V in When the phase value is within the predetermined phase range, the control circuit 1112 sends a signal to the third switch Q. L Periodically send the third control signal G QL Each transmission lasts for a first preset duration T1, causing the third switch Q to... L According to the third control signal G QL It is periodically switched on. Simultaneously, control circuit 1112 does not send signals to the fourth switch Q. H Send the fourth control signal G QH Make the fourth switch Q H Turn off.

[0073] In one embodiment, the predetermined phase range includes a phase of 0-180 degrees and a phase of 270-360 degrees.

[0074] In one embodiment, a predetermined voltage value V Y It can be set to k times the peak voltage of the output voltage V1 provided by the totem pole power factor correction circuit 111. k is a constant greater than 0 and less than 1. For example, when the input voltage V in When the peak voltage is greater than the preset voltage, the preset voltage value V Y It can be set to 3 / 8*V1. When the input voltage V in When the peak voltage is less than the preset voltage, the preset voltage value V Y It can be set to 3 / 16*V1.

[0075] It should be noted that the settings of the predetermined phase interval and predetermined voltage value provided in the embodiments of this application are merely examples, and this application does not limit the specific values ​​of the predetermined phase interval and predetermined voltage value. The specific values ​​of the predetermined phase interval and predetermined voltage value can be preset, can be pre-set, or can be adjusted by the control circuit according to different situations.

[0076] In one embodiment, between time t2 and time t3, when the third switch Q... L Open, fourth switch Q H When turned off, the input voltage V in Through inductor L and third switch Q L and the first switch S L When an inductor L is charged, the current i flowing through the inductor L is... L Gradually increase. When the third switch QL Off, fourth switch Q H When turned off, the fourth switch Q is used. H Taking a MOSFET as an example, the inductor L passes through the fourth switch Q. H body diode D QH The output terminals a and b of the power factor correction circuit 112 and the first switch S L Discharge, thereby providing output voltage V1 to DC-DC converter circuit 112.

[0077] The input voltage V received by the totem pole power factor correction circuit 111 after time t3 and before time t4 is... in The voltage value is greater than the predetermined voltage value V. Y Control circuit 1112 controls the third switch Q L and the fourth switch Q H Alternately activated.

[0078] In one embodiment, between time t3 and time t4, in response to the input voltage V in The absolute value of the voltage is greater than or equal to the predetermined voltage value V. Y And the input voltage V in The phase value is not within the predetermined phase range, and the control circuit 1112 sends a signal to the third switch Q. L Periodically send the third control signal G QL and to the fourth switch Q H Send the fourth control signal G QH Make the third switch Q L and the fourth switch Q H Alternating switching. Among them, the control circuit 1112, acting as the main power transistor, directs power to the third switch Q. L The third control signal G sent QL Each session lasts for the first preset duration T1, and the third switch Q... L The duration of each activation is the first preset duration T1. As an auxiliary power transistor, control circuit 1112 directs power to the fourth switch Q. H The fourth control signal G sent QH Each duration is the second preset duration T2, and the fourth switch Q... H The duration of each activation is the second preset duration T2.

[0079] In one embodiment, between time t3 and time t4, when the third switch Q... L Open, fourth switch Q H When turned off, the input voltage V in Through inductor L and third switch Q L and the first switch S L When an inductor L is charged, the current i flowing through the inductor L is... LGradually increase. When the third switch Q L Off, fourth switch Q H When turned off, the fourth switch Q is used. H Taking a MOSFET as an example, the inductor L passes through the fourth switch Q. H body diode D QH The output terminals a and b of the totem pole power factor correction circuit 111 and the first switch S L Discharge, thereby providing output voltage V1 to DC-DC converter circuit 112. When the third switch Q... L Off, fourth switch Q H When switched on, inductor L passes through the fourth switch Q. H The source and drain, the output terminals a and b of the power factor correction circuit 112, and the first switch S L Discharge, thereby providing output voltage V1 to DC-DC converter circuit 112.

[0080] After time t4 and before time t5, the response is based on the input voltage V. in The absolute value of the voltage is greater than V0 and less than the predetermined voltage value V. Y And the input voltage V in When the phase value is within the predetermined phase range, the control circuit 1112 sends a signal to the third switch Q. L Periodically send the third control signal G QL Each transmission lasts for a first preset duration T1, causing the third switch Q to... L According to the third control signal G QL It is periodically switched on. Simultaneously, control circuit 1112 does not send signals to the fourth switch Q. H Send the fourth control signal G QH Make the fourth switch Q H Turn off.

[0081] After time t5, the input voltage V received by the totem pole power factor correction circuit 111 is... in When the voltage value is less than V0, the control circuit 1112 does not send a signal to the third switch Q. L Send the third control signal G QL Do not switch Q H Send the fourth control signal G QH The third switch Q L and the fourth switch Q H Turn off.

[0082] At time t6, the input voltage V received by the totem pole power factor correction circuit 111 is... in The voltage value decreases from 0. Control circuit 1112 sends a signal to the second switch S. H Send the second control signal G SH Make the second switch SL According to the second control signal G SH Activated. Simultaneously, the first switch S... L Shutdown. After time t6, t 11 Before time, the input voltage V in If all voltage values ​​are negative, then control circuit 1112 continuously supplies power to the second switch S. H Send the second control signal G SH Make the second switch S H Continuously open, first switch S L Continuous shutdown. At time t6-t 11 Between moments, the fourth switch Q used for charging capacitor L H Let Q be the main power transistor and the third switch used to discharge capacitor L. L This is designated as the auxiliary power transistor.

[0083] The input voltage V received by the totem pole power factor correction circuit 111 after time t6 and before time t7 is... in When the voltage value is less than V0, the control circuit 1112 does not send a signal to the third switch Q. L Send the third control signal G QL Do not switch Q H Send the fourth control signal G QH The third switch Q L and the fourth switch Q H Turn off.

[0084] After time t7 and before time t8, in response to the input voltage V in The absolute value of the voltage is greater than V0 and less than the predetermined voltage value V. Y But the input voltage V in The phase value is not within the predetermined phase range, and the control circuit 1112 controls the third switch Q. L Alternately turn on and off, and control the fourth switch Q. H Turn off.

[0085] Among them, between time t7 and time t8, although the input voltage V in The absolute value of the voltage is less than the predetermined voltage value V. Y However, when the input voltage V in When the phase value is between 180 degrees and 270 degrees, the fourth switch Q H Main power transistor, third switch Q L It is an auxiliary power transistor. Figure 7 Another circuit structure diagram of the totem pole power factor correction circuit provided in this application is shown below. Figure 7 The bootstrap capacitors and connections for each power transistor are shown. This is to provide power to the fourth switch Q. H bootstrap capacitor CQH To charge, the third switch Q must be turned on. L This makes the charging voltage V REG Able to pass through bootstrap capacitor C QH Third switch Q L The drain and source are grounded. Between time t7 and t8, if control circuit 1112 only controls the fourth switch Q... H Turn on and control the third switch Q L When the fourth switch Q is turned off, H The inability to perform bootstrap charging results in the entire totem pole power factor correction circuit 111 failing to provide the output voltage V1 properly. Therefore, between time t7 and t8, the control circuit 1112 controls the third switch Q. L and the fourth switch Q H Alternately activated.

[0086] After time t8 and before time t9, the response is to the input voltage V. in The absolute value of the voltage is greater than the predetermined voltage value V. Y And the input voltage V in The phase value is not within the predetermined phase range, and the control circuit 1112 sends a signal to the third switch Q. L Periodically send the third control signal G QL and to the fourth switch Q H Send the fourth control signal G QH Make the third switch Q L and the fourth switch Q H Alternately activated.

[0087] In one embodiment, between time t7 and time t9, in response to the input voltage V in The absolute value of the voltage is greater than V0 and less than the predetermined voltage value V. Y And the input voltage V in The phase value is not within the predetermined phase range, and the control circuit 1112 sends a signal to the third switch Q. L Periodically send the third control signal G QL and to the fourth switch Q H Send the fourth control signal G QH Make the third switch Q L and the fourth switch Q H Alternating switching. As the main power transistor, control circuit 1112 directs power to the fourth switch Q. H The fourth control signal G sent QH The duration of each cycle is the first preset duration T1, and the fourth switch Q... H The duration of each activation is the first preset duration T1. As an auxiliary power transistor, control circuit 1112 directs power to the third switch Q. LThe third control signal G sent QL Each duration is the second preset duration T2, and the third switch Q... L The duration of each activation is the second preset duration T2.

[0088] Between time t7 and t9, when the fourth switch Q... H Turn on, third switch Q L When turned off, the input voltage V in Through inductor L and fourth switch Q H Second switch S Q When an inductor L is charged, the current i flowing through the inductor L is... L Gradually increase. When the third switch Q L Off, fourth switch Q H When turned off, the third switch Q is used. L Taking a MOSFET as an example, the inductor L passes through the third switch Q. L body diode D QL Output terminals b and a of the power factor correction circuit 112, and the second switch S Q Discharge, thereby providing output voltage V1 to DC-DC converter circuit 112. When the fourth switch Q... H Off, third switch Q L When switched on, inductor L passes through the third switch Q. L The source and drain terminals, the output terminal b of the power factor correction circuit 112, the output terminal a, and the second switch S Q Discharge, thereby providing output voltage V1 to DC-DC converter circuit 112.

[0089] After time t9, t 10 Before the specified time, the totem pole power factor correction circuit 111 received the input voltage V. in The voltage value is greater than V0 and less than the predetermined voltage value V. Y Control circuit 1112 controls the fourth switch Q H Alternately turn on and off, and control the third switch Q. L Turn off.

[0090] In one embodiment, from time t9 to t 10 Between moments, in response to the input voltage V in The absolute value of the voltage is greater than V0 and less than the predetermined voltage value V. Y And the input voltage V in When the phase value is within the predetermined phase range, the control circuit 1112 sends a signal to the fourth switch Q. H Periodically send the fourth control signal G QH Each transmission lasts for a first preset duration T1, causing the fourth switch Q to... H According to the fourth control signal GQH It is periodically switched on. Meanwhile, control circuit 1112 does not send signals to the third switch Q. L Send the third control signal G QL This makes the third switch Q L Turn off.

[0091] In one embodiment, from time t9 to t 10 Between moments, when the fourth switch Q H Turn on, third switch Q L When turned off, the input voltage V in Through inductor L and fourth switch Q H Second switch S H When an inductor L is charged, the current i flowing through the inductor L is... L Gradually increase. When the third switch Q L Off, fourth switch Q H When turned off, the third switch Q is used. L Taking a MOSFET as an example, the inductor L passes through the third switch Q. L body diode D QL Output terminals b and a of the power factor correction circuit 112, and the second switch S H Discharge, thereby providing output voltage V1 to DC-DC converter circuit 112.

[0092] In summary, the control circuit 1112 of the totem pole power factor correction circuit 111 can adjust the current input voltage V of the totem pole power factor correction circuit 111 according to the current input voltage V of the totem pole power factor correction circuit 111. in When the phase value of the instantaneous voltage is within a predetermined phase interval and the absolute value of the voltage is less than a predetermined voltage value, the control circuit 1112 controls the main power transistor in the half-bridge circuit 1111b to turn on and off, and controls the auxiliary power transistor to remain off. (Refer to the embodiments of this application.) Figure 6 In the control logic of this application embodiment, the control circuit 111 operates at times t2-t3, t4-t5, and t9-t3. 10 Between moments, the input voltage V in When the instantaneous voltage value is small, the auxiliary power transistor is kept off.

[0093] Therefore, when the input voltage V in When the voltage value is low, the input voltage V inWhen the energy supplied to inductor L is relatively small, the control circuit 1112 can control the auxiliary power transistor to remain off. This avoids the "hard turn-on" of the auxiliary power transistor when the voltage on both sides of the auxiliary power transistor is different, in situations where inductor L cannot resonate the voltage on one side of the auxiliary power transistor to a higher voltage value. Therefore, this embodiment can reduce the switching loss of the auxiliary power transistor in the totem pole power factor correction circuit 111 and improve the working efficiency of the totem pole power factor correction circuit 111 and the power module 11 in which it is located. Furthermore, it does not involve any improvement to the existing structure of the totem pole power factor correction circuit 111, and also has the advantages of simple circuit structure and low cost.

[0094] Furthermore, it should be noted that control circuit 1112 operates at times t2-t3, t4-t5, and t9-t3. 10 During this period, the auxiliary power transistor remains off, but the inductor L can still discharge through the body diode of the auxiliary power transistor, thereby providing the output voltage V1 to the DC-DC converter circuit 112. Therefore, in this embodiment, the control circuit 1112's control of the half-bridge circuit 1111b has a relatively small impact on the output voltage V1 of the totem pole power factor correction circuit 111, ensuring the normal operation of the totem pole power factor correction circuit 111 and its associated power module 11.

[0095] Figure 8 This is a schematic diagram of a power supply module provided in this application. Figure 8 The power module shown is in Figure 4 Based on the above, it also includes: a first detection circuit 1113 and a second detection circuit 1114. The control circuit 1112 can be used to detect the input voltage V of the totem pole power factor correction circuit 111 through the first detection circuit 1113. in The voltage and phase values, etc., enable the control circuit 1112 to adjust according to the input voltage V. in The voltage and phase values ​​are used to control the half-bridge circuit 1111b. The control circuit 1112 can be used to detect the output voltage V1 of the totem pole power factor correction circuit 111 through the second detection circuit 1114, and so that the control circuit 1112 determines a predetermined voltage value based on the output voltage V1. This application does not limit the specific circuit structure of the first detection circuit 1113 and the second detection circuit 1114. For example, the first detection circuit may include multiple series-connected voltage divider resistors, and then the control circuit 1112 can determine the input voltage V by detecting the voltage value on the voltage divider resistors. in Voltage values, etc.

[0096] Figure 9 This application provides a schematic diagram of the control logic for a totem pole power factor correction circuit. (See attached diagram.) Figure 9The control logic shown can be applied to, for example... Figure 4 In the power module 11 shown, the control circuit 1112 for the totem pole power factor correction circuit 111 controls the half-bridge circuit 1111b. The following section combines... Figure 4 The totem pole power factor correction circuit 111 provided in the embodiment of this application is for the purpose of correcting the power factor correction circuit provided in the embodiment of this application. Figure 9 The control logic within will be explained.

[0097] like Figure 9 As shown, the control circuit 1112 adjusts according to the input voltage V. in The voltage value is used to output control signals to the main power transistor and auxiliary power transistor in the totem pole power factor correction circuit 111, controlling the main power transistor and auxiliary power transistor to alternately turn on and off. The control circuit 1112 specifically sends control signals to the main power transistor and auxiliary power transistor in the totem pole power factor correction circuit 111 at the desired timing. Figure 5 The times shown are the same, so I will not repeat them.

[0098] In particular, Figure 9 In the illustrated embodiment, before each control signal is sent to the main power transistor, the control circuit 1112 determines the current input voltage V. in The voltage value is used to adjust the duration of the control signal sent to the main power transistor, so that the duration of the control signal is related to the input voltage V. in The absolute value of the voltage is negatively correlated, which in turn causes the duration of the main power transistor's turn-on time to be related to the input voltage V. in The voltage values ​​are negatively correlated.

[0099] In one embodiment, the control circuit 1112 can multiply the first preset duration T1 of each main power transistor turn-on by a multiple n to obtain the adjusted duration of the control signal. n is the sum of the input voltage V and the input voltage V. in A constant that is negatively correlated with the absolute value of the voltage. For example, such as Figure 9 As shown, between time t1 and time t6, the third switch Q... L It is the main power transistor. Then, the control circuit 1112 operates between time t2 and t5. 21 At that moment, to the third switch Q L Send the third control signal G QL Previously, the first preset duration T1 was multiplied by the multiple n to obtain the adjusted duration T1'. Then, the control circuit 1112 sends a signal to the third switch Q. L Send the third control signal G QL And the duration is T1', causing the third switch Q to... L The activation time is T1'. Control circuit 1112 does not align with the fourth switch Q between times t2 and t5. H The fourth control signal G sentQH The duration is adjusted to maintain the second and preset duration T2. ​​Accordingly, between time t6 and time t11, the fourth switch Q... H If it is the main power transistor, then the control circuit 1112 sends power to the fourth switch Q. H The fourth control signal G sent QH The duration is T1', and it is directed to the third switch Q. L Send the third control signal G QL Maintain the second duration and the preset duration T2.

[0100] Since n is related to the input voltage V in The voltage values ​​are negatively correlated, therefore throughout the entire time t1 - t 11 Between moments, input voltage V in Within one cycle, the conduction time of the main power transistor is related to the input voltage V. in The voltage value. Then when the input voltage V in At lower voltages, the main power transistor has a longer on-time, increasing the input voltage V. in The duration of charging inductor L increases the energy of inductor L after charging. And when the input voltage V... in At higher levels, the main power transistor has a shorter conduction time, which can also maintain overall energy balance and reduce the impact of changes in the main power transistor's conduction time on the power of the totem pole power factor correction circuit 111 output voltage V1.

[0101] Even at the input voltage V in When the voltage value is low, the input voltage V in The energy supplied to inductor L can also be increased. This results in improvements at times t2-t3, t4-t5, and t9-t2. 10 During these brief moments, the voltage supplied by inductor L to the auxiliary power transistor is increased, preventing the auxiliary power transistor from "hard-turning on" when the voltages on both sides of the auxiliary power transistor are not simultaneous. Therefore, this embodiment can reduce the switching losses of the auxiliary power transistor in the totem-pole power factor correction circuit 111 and improve the operating efficiency of the totem-pole power factor correction circuit 111 and its associated power module 11. Furthermore, it does not require any improvement to the existing structure of the totem-pole power factor correction circuit 111, and also has the advantages of simple circuit structure and low cost.

[0102] This application also provides an electronic device, including a control circuit 1112 as provided in any embodiment of this application, or a power module 11 as provided in any embodiment of this application.

[0103] In the foregoing embodiments, the method executed by the control circuit 1112 provided in this application embodiment has been described. To realize the functions of the methods provided in the above embodiments, the control circuit 1112, as the execution body, may include hardware structures and / or software modules, implementing the above functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is executed in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution. It should be noted that the division of the various modules in the above device is merely a logical functional division; in actual implementation, they can be fully or partially integrated into a single physical entity, or physically separated. These modules can all be implemented in software through processing element calls; they can all be implemented in hardware; or some modules can be implemented in software through processing element calls, and some modules can be implemented in hardware. A separate processing element can be established, or it can be integrated into a chip in the above device. Furthermore, it can be stored in the memory of the above device as program code, and called and executed by a processing element of the above device. The implementation of other modules is similar. Furthermore, these modules can be integrated, either wholly or partially, or implemented independently. The processing element described here can be an integrated circuit with signal processing capabilities. During implementation, each step of the above method or each of the above modules can be completed through integrated logic circuits in the hardware of the processor element or through software instructions. For example, these modules can be one or more integrated circuits configured to implement the above method, such as one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs), etc. As another example, when a module is implemented through processing element scheduler code, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor capable of calling program code. Furthermore, these modules can be integrated together as a system-on-a-chip (SOC).

[0104] In the above embodiments, the steps performed by the control circuit 1112 can be implemented, in whole or in part, by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks (SSDs)).

[0105] This application also provides a computer-readable storage medium storing computer instructions, which, when executed, can be used to perform any of the methods executed by the control circuit 1112 in the foregoing embodiments of this application.

[0106] This application also provides a chip for executing instructions, the chip being used to perform any of the methods executed by the control circuit 1112 as described above.

[0107] This application also provides a computer program product, which includes a computer program stored in a storage medium. At least one processor can read the computer program from the storage medium. When the at least one processor executes the computer program, it can implement any of the methods executed by the control circuit 1112 as described above in this application.

[0108] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, magnetic disk, or optical disk.

[0109] Those skilled in the art will understand that, for the purpose of illustrating the technical solution of this application, the embodiments of this application are described separately by functional modules, and the circuit devices in each module may partially or completely overlap, which is not intended to limit the scope of protection of this application.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A totem pole power factor correction circuit, characterized in that, include: The circuit comprises a first half-bridge circuit, a second half-bridge circuit, an inductor, and a control circuit. The first half-bridge circuit includes a first switch and a second switch connected in series, with the midpoint of their bridge arms connected to the negative terminal of the input voltage. The second half-bridge circuit includes a third switch and a fourth switch connected in series, with the midpoint of their bridge arms connected to the positive terminal of the input voltage through the inductor. The first and second half-bridge circuits are connected in parallel between the first and second output terminals of the totem pole power factor correction circuit. The totem pole power factor correction circuit receives the input voltage and provides an output voltage. The control circuit outputs control signals to the third and fourth switches. In response to the phase value of the input voltage being within the phase range of 0 to 180 degrees, the third switch serves as the main power transistor and the fourth switch serves as the auxiliary power transistor. In response to the phase value of the input voltage being within the phase range of 180 degrees to 360 degrees, the fourth switch acts as the main power transistor and the third switch acts as the auxiliary power transistor. In response to the phase value of the input voltage being within a predetermined phase interval and the absolute value of the input voltage being less than a predetermined voltage value, the main power transistor is turned on and off according to the control signal, and the auxiliary power transistor remains off according to the control signal; wherein, the predetermined phase interval includes: 0 degrees-180 degrees and 270 degrees-360 degrees; In response to the phase value of the input voltage being outside the predetermined phase range, the main power transistor and the auxiliary power transistor alternately turn on and off according to the control signal.

2. The totem pole power factor correction circuit according to claim 1, characterized in that, Also includes: In response to the absolute value of the input voltage being greater than or equal to the predetermined voltage setting, the main power transistor and the auxiliary power transistor alternately turn on and off according to the control signal.

3. The totem pole power factor correction circuit according to claim 1 or 2, characterized in that, The predetermined voltage value is k times the peak voltage of the output voltage, where k is greater than 0 and less than 1.

4. A control circuit for a totem pole power factor correction circuit, characterized in that, For controlling the totem pole power factor correction circuit as described in claim 1, the control circuit is configured as follows: In response to the phase value of the input voltage of the totem pole power factor correction circuit being within the phase range of 0 degrees to 180 degrees, the third switch is used as the main power transistor and the fourth switch is used as the auxiliary power transistor. In response to the phase value of the input voltage being within the phase range of 180 degrees to 360 degrees, the fourth switch is used as the main power transistor and the third switch is used as the auxiliary power transistor. In response to the phase value of the input voltage being within a predetermined phase range and the absolute value of the input voltage being less than a predetermined voltage value, the main power transistor is controlled to turn on and off, while the auxiliary power transistor is controlled to remain off. The predetermined phase range includes: 0 degrees - 180 degrees and 270 degrees - 360 degrees; In response to the phase value of the input voltage being outside the predetermined phase range, the main power transistor and the auxiliary power transistor are controlled to alternately turn on and off.

5. The control circuit according to claim 4, characterized in that, The control circuit is also used for: In response to the input voltage being greater than or equal to the predetermined voltage setting, the main power transistor and the auxiliary power transistor are controlled to alternately turn on and off.

6. The control circuit according to claim 4 or 5, characterized in that, The predetermined voltage value is k times the peak voltage of the output voltage of the totem pole power factor correction circuit, where k is greater than 0 and less than 1.

7. A totem pole power factor correction circuit, characterized in that, include: The circuit comprises a first half-bridge circuit, a second half-bridge circuit, an inductor, and a control circuit. The first half-bridge circuit includes a first switch and a second switch connected in series, with the midpoint of their bridge arms connected to the negative terminal of the input voltage. The second half-bridge circuit includes a third switch and a fourth switch connected in series, with the midpoint of their bridge arms connected to the positive terminal of the input voltage through the inductor. The first and second half-bridge circuits are connected in parallel between the first and second output terminals of the totem pole power factor correction circuit. The totem pole power factor correction circuit receives the input voltage and provides an output voltage. The control circuit outputs control signals to the third and fourth switches. In response to the phase value of the input voltage being within the phase range of 0 to 180 degrees, the third switch serves as the main power transistor and the fourth switch serves as the auxiliary power transistor. In response to the phase value of the input voltage being within the phase range of 180 degrees to 360 degrees, the fourth switch acts as the main power transistor and the third switch acts as the auxiliary power transistor. The main power transistor and the auxiliary power transistor are alternately turned on and off according to the control signal; The duration for which the main power transistor is turned on each time is n times the preset duration for which the main power transistor is turned on each time, and n is negatively correlated with the absolute value of the input voltage.

8. A control circuit for a totem pole power factor correction circuit, characterized in that, Used to control the totem pole power factor correction circuit as described in claim 7; the control circuit is configured to: In response to the phase value of the input voltage being within the phase range of 0 to 180 degrees, the third switch serves as the main power transistor and the fourth switch serves as the auxiliary power transistor. In response to the phase value of the input voltage being within the phase range of 180 degrees to 360 degrees, the fourth switch acts as the main power transistor and the third switch acts as the auxiliary power transistor. Control the main power transistor and the auxiliary power transistor to alternately turn on and off; The duration for which the main power transistor is turned on each time is controlled to be n times the preset duration for which the main power transistor is turned on each time, and n is negatively correlated with the absolute value of the input voltage.

9. A power supply module, characterized in that, The power supply module is used to acquire input voltage and supply power to the load; it includes: The totem pole power factor correction circuit according to any one of claims 1-3 is used to acquire the input voltage and provide the output voltage; A DC-DC converter circuit is used to convert the output voltage and then supply power to the load.

10. A power supply module, characterized in that, The power supply module is used to acquire input voltage and supply power to the load; it includes: The totem pole power factor correction circuit of claim 7 is used to acquire the input voltage and provide the output voltage; A DC-DC converter circuit is used to convert the output voltage and then supply power to the load.

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