Transformer, power supply device and electronic equipment

Abstract

The utility model discloses a transformer, a power supply device and electronic equipment. The transformer comprises a framework shell, a first magnetic core assembly, a second magnetic core assembly, a double-groove framework, a first coil and a second coil. The framework shell is provided with a containing groove, a first opening and a second opening, wherein the first opening and the second opening are communicated with the containing groove and are oppositely arranged. The double-groove framework is contained in the containing groove and provided with a through hole. The magnetic core of the first magnetic core assembly penetrates through the groove bottom of the containing groove and then is contained in one end of the through hole, and the magnetic core of the second magnetic core assembly is contained in the other end of the through hole. The double-groove framework is provided with a first groove and a second groove, and the first groove and the second groove are arranged around the through hole. The first coil is annularly arranged in the first groove, the second coil is annularly arranged in the second groove, the first coil is partially exposed out of the first opening and the second opening, and the second coil is partially exposed out of the first opening and the second opening. The transformer can adjust the output voltage according to requirements, and is high in practicability.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of power supply technology, and in particular to a transformer, a power supply device and an electronic device. Background Art

[0002] A transformer is a device that can change the voltage of alternating current. A transformer consists of a magnetic field passing through two or more coils (called windings), usually an input winding and an output winding. When alternating current is passed through the input winding of the transformer, the magnetic field changes in the output winding, thereby changing the output voltage.

[0003] At present, common transformers on the market are all standardized transformers, and different output voltages require the selection of corresponding transformers. That is, each transformer usually only provides one output voltage, which is less practical. Utility Model Content

[0004] The embodiments of the present application provide a transformer, a power supply device and an electronic device, which can provide a transformer that can adjust the output voltage according to demand and has strong practicality.

[0005] In a first aspect, an embodiment of the present application provides a transformer, including:

[0006] A skeleton shell, a first magnetic core component, a second magnetic core component, a double-slot skeleton, a first coil and a second coil;

[0007] The skeleton shell is provided with a receiving groove and a first opening and a second opening communicating with the receiving groove, wherein the first opening and the second opening are arranged opposite to each other;

[0008] The double-slot frame is received in the receiving slot, and the double-slot frame is provided with a through hole;

[0009] The magnetic core of the first magnetic core component passes through the bottom of the receiving groove and is received in one end of the through hole, and the magnetic core of the second magnetic core component is received in the other end of the through hole;

[0010] The double-groove frame is provided with a first groove and a second groove, and the first groove and the second groove are both provided around the through hole;

[0011] The first coil ring is disposed in the first groove, the second coil ring is disposed in the second groove, the first coil portion is exposed in the first opening and the second opening, and the second coil portion is exposed in the first opening and the second opening.

[0012] In a second aspect, an embodiment of the present application provides a power supply device, including:

[0013] Printed circuit boards;

[0014] The transformer as described above, wherein the transformer is arranged on the printed circuit board;

[0015] The rectifier circuit is disposed on the printed circuit board and connected to the transformer, and is configured to synchronously rectify the voltage of the second coil in the transformer so that the power supply device outputs a first voltage.

[0016] In one or more embodiments, the first coil of the transformer is a primary side, the second coil of the transformer is a secondary side, the second coil includes a first sub-coil and a second sub-coil, the opposite-name end of the first sub-coil and the same-name end of the second sub-coil are connected to a first node, and the first node outputs the first voltage;

[0017] The rectifier circuit comprises a control branch, a first switch branch and a second switch branch, wherein the first end of the control branch is connected to the first end of the first switch branch and the same-name end of the first sub-coil respectively, the second end of the control branch is connected to the second end of the first switch branch, the third end of the control branch is connected to the third end of the first switch branch, the fourth end of the control branch is connected to the first end of the second switch branch and the opposite-name end of the second sub-coil respectively, the fifth end of the control branch is connected to the second end of the second switch branch, and the sixth end of the control branch is connected to the third end of the second switch branch;

[0018] The control branch is configured to output a first control signal at its third terminal when the voltage between the first terminal and the second terminal is greater than a first preset voltage, and is configured to output a second control signal at its sixth terminal when the voltage between the fourth terminal and the fifth terminal is greater than the first preset voltage;

[0019] The first switch branch is turned on in response to the first control signal, or the second switch branch is turned on in response to the second control signal, to synchronously rectify the voltage of the second coil.

[0020] In one or more embodiments, the control branch includes a signal processing chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor and a voltage-stabilizing diode;

[0021] The first resistor is connected between the first end and the tenth end of the signal processing chip, the second resistor is connected between the first end and the ninth end of the signal processing chip, the third resistor is connected between the first end of the signal processing chip and the anode of the voltage-regulating diode, the fourth resistor is connected between the first end of the signal processing chip and the cathode of the voltage-regulating diode, the cathode of the voltage-regulating diode is connected to the first node, the first capacitor is connected between the first end of the signal processing chip and the second end of the signal processing chip, the second end of the signal processing chip is grounded, the third end of the signal processing chip is connected to the second end of the second switch branch, the fourth end of the signal processing chip is connected to the third end of the second switch branch, the fifth end of the signal processing chip is connected to the opposite end of the second sub-coil through the seventh resistor and the eighth resistor in sequence, the eighth end of the signal processing chip is connected to the second end of the first switch branch, the seventh end of the signal processing chip is connected to the third end of the first switch branch, and the sixth end of the signal processing chip is connected to the same end of the first sub-coil through the fifth resistor and the sixth resistor in sequence.

[0022] In one or more embodiments, the control branch further includes a first switch tube, a second switch tube, a ninth resistor and a tenth resistor;

[0023] The first end of the first switch tube is connected to the first end of the signal processing chip through the ninth resistor, the connection point between the fifth resistor and the sixth resistor is connected to the second end of the first switch tube, the third end of the first switch tube is connected to the same-name end of the first sub-coil, the first end of the second switch tube is connected to the first end of the signal processing chip through the tenth resistor, the connection point between the seventh resistor and the eighth resistor is connected to the second end of the second switch tube, and the third end of the second switch tube is connected to the opposite-name end of the second sub-coil.

[0024] In one or more embodiments, the first switch branch includes a third switch tube having a parasitic diode;

[0025] The first end of the third switch tube is connected to the second end of the control branch, the second end of the third switch tube is connected to the third end of the control branch, and the third end of the third switch tube is connected to the same end of the first sub-coil.

[0026] In one or more embodiments, the first switch branch further includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a second capacitor and a first diode;

[0027] The second capacitor and the eleventh resistor are connected in series between the third end and the second end of the third switch tube, the twelfth resistor is connected between the anode of the first diode and the first end of the third switch tube, the cathode of the first diode is connected to the second end of the control branch, the fourteenth resistor is connected between the cathode of the first diode and the first end of the third switch tube, the thirteenth resistor is connected between the first end and the second end of the third switch tube, and the second end of the third switch tube is grounded.

[0028] In one or more embodiments, the second switch branch includes a fourth switch tube having a parasitic diode;

[0029] The first end of the fourth switch tube is connected to the fifth end of the control branch, the second end of the fourth switch tube is connected to the sixth end of the control branch, and the third end of the fourth switch tube is connected to the opposite end of the second sub-coil.

[0030] In one or more embodiments, the second switch branch further includes a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a third capacitor and a second diode;

[0031] The third capacitor and the fifteenth resistor are connected in series between the third end and the second end of the fourth switch tube, the sixteenth resistor is connected between the anode of the second diode and the first end of the fourth switch tube, the cathode of the second diode is connected to the fifth end of the control branch, the eighteenth resistor is connected between the cathode of the second diode and the first end of the fourth switch tube, the seventeenth resistor is connected between the first end and the second end of the fourth switch tube, and the second end of the fourth switch tube is grounded.

[0032] In a third aspect, an embodiment of the present application provides an electronic device, including a load and a power supply device as described above, wherein the power supply device is connected to the load and is used to supply power to the load.

[0033] The beneficial effects of the present application are as follows: the transformer of the embodiment of the present application includes a skeleton shell, a first magnetic core component, a second magnetic core component, a double-slot skeleton, a first coil and a second coil. The skeleton shell is provided with a receiving groove and a first opening and a second opening connected to the receiving groove, and the first opening and the second opening are arranged oppositely. The double-slot skeleton is accommodated in the receiving groove, and the double-slot skeleton is provided with a through hole. The magnetic core of the first magnetic core component is accommodated at one end of the through hole after passing through the bottom of the receiving groove, and the magnetic core of the second magnetic core component is accommodated at the other end of the through hole. The double-slot skeleton is provided with a first groove and a second groove, and the first groove and the second groove are both arranged around the through hole. The first coil ring is arranged in the first groove, and the second coil ring is arranged in the second groove, and the first coil is partially exposed in the first opening and the second opening, and the second coil is partially exposed in the first opening and the second opening. Therefore, for the transformer provided in the embodiment of the present application, since the first coil and the second coil are separately arranged in the first groove and the second groove, the first coil and the second coil do not affect each other, so the output voltage of the transformer can be changed by changing the model and specification of the second coil alone, such as changing the number of turns of the second coil, which can meet user needs and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] One or more embodiments are exemplarily described by the figures in the corresponding drawings, and these exemplary descriptions are not intended to limit the embodiments. Elements with the same reference numerals in the drawings represent similar elements.

[0035] Figure 1 This is a schematic diagram of the structure of the transformer provided in the embodiment of the present application. Figure 1 ;

[0036] Figure 2 This is a schematic diagram of the structure of the transformer provided in the embodiment of the present application. Figure 2 ;

[0037] Figure 3 This is a schematic diagram of the structure of the power supply device provided in the embodiment of the present application. Figure 1 ;

[0038] Figure 4 This is a schematic diagram of the structure of the power supply device provided in the embodiment of the present application. Figure 2 ;

[0039] Figure 5 is with Figure 4 A circuit structure corresponding to the structure shown. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and in detail in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] It should be noted that, when an element is described as being “connected to” another element, it may be directly connected to the other element, or one or more intervening elements may exist therebetween.

[0042] In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as there is no structural conflict between them.

[0043] Please refer to Figure 1 and Figure 2 , Figure 1 and Figure 2 These are all schematic diagrams of transformer structures. Figure 1 and Figure 2 As shown, the transformer 100 includes a skeleton housing 101, a first magnetic core component 102, a second magnetic core component 103, a double-slot skeleton 104, a first coil L1 and a second coil L2.

[0044] The skeleton shell 101 is provided with a receiving groove (i.e., a hollow portion of the skeleton shell 101) and a first opening and a second opening communicating with the receiving groove, and the first opening and the second opening are arranged opposite to each other. Figure 1 The upper and lower openings of the skeleton shell 101 are respectively the first opening and the second opening. The double-slot skeleton 104 is received in the receiving groove. The double-slot skeleton 104 is provided with a through hole 1043. The magnetic core 1021 of the first magnetic core component 102 passes through the bottom of the receiving groove (i.e., passes through the through hole at the bottom of the receiving groove) and is received at one end of the through hole 1043, and the magnetic core 1031 of the second magnetic core component 103 is received at the other end of the through hole 1043. The double-slot skeleton 104 is provided with a first groove 1041 and a second groove 1042, and the first groove 1041 and the second groove 1042 are both provided around the through hole 1043. The first coil L1 is provided in the first groove 1041, and the second coil L2 is provided in the second groove 1042. The first coil L1 is partially exposed at the first opening and the second opening, and the second coil L2 is partially exposed at the first opening and the second opening.

[0045] Through the above process, when the first coil L1 is connected to an AC power source, the second coil L2 will output a corresponding voltage, that is, the function of the transformer is realized. Secondly, in the transformer 100 of this embodiment, the first coil L1 and the second coil L2 are separately arranged in the first groove 1041 and the second groove 1042, so the first coil L1 and the second coil L2 do not affect each other, so the output voltage of the transformer 100 can be changed by changing the model and specification of the second coil L2 alone, such as changing the number of turns of the second coil L2. Compared with the standardized transformer in the related art that can only provide one voltage, the transformer 100 provided in the embodiment of the present application can provide corresponding output voltages based on different application scenarios, and there are many applicable application scenarios, so it is more practical.

[0046] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of the power supply device provided in the embodiment of the present application. Figure 3 As shown, the power supply device 1000 includes a printed circuit board (not shown), a transformer 100 and a rectifier circuit 200. The transformer 100 can be Figure 1 and Figure 2 The structure shown is realized. Among them, the printed circuit board is a substrate used to support and connect electronic components, usually made of conductive material (such as copper) printed on insulating material (such as resin).

[0047] Specifically, the transformer 100 and the rectifier circuit 200 are both disposed on a printed circuit board. The rectifier circuit 200 is connected to the transformer 100. The rectifier circuit 200 is configured to synchronously rectify the voltage of the second coil L2 in the transformer 100 so that the power supply device 1000 outputs a first voltage.

[0048] By synchronously rectifying the voltage of the second coil L2, the stability and quality of the voltage can be improved, and the power loss and circuit danger can be reduced. Secondly, the voltage and frequency can be adjusted to ensure that the output voltage is stable and meets specific requirements. In addition, energy efficiency can be improved, the energy consumption and heating problems of traditional rectification methods can be reduced, and the power utilization rate can be improved.

[0049] In one embodiment, if Figure 4 As shown, the first coil L1 of the transformer 100 is the primary side, the second coil L2 of the transformer 100 is the secondary side, the second coil L2 includes a first sub-coil L21 and a second sub-coil L22, the opposite-name end of the first sub-coil L21 and the same-name end of the second sub-coil L22 are connected to the first node N1, and the first node N1 outputs the first voltage VO1.

[0050] The rectifier circuit 200 includes a control branch 201, a first switch branch 202, and a second switch branch 203. The first end of the control branch 201 is connected to the first end of the first switch branch 202 and the same-name end of the first sub-coil L21, the second end of the control branch 201 is connected to the second end of the first switch branch 202, the third end of the control branch 201 is connected to the third end of the first switch branch 202, the fourth end of the control branch 201 is connected to the first end of the second switch branch 203 and the opposite-name end of the second sub-coil L22, the fifth end of the control branch 201 is connected to the second end of the second switch branch 203, and the sixth end of the control branch 201 is connected to the third end of the second switch branch 203.

[0051] Specifically, the control branch 201 is configured to output a first control signal to the first switch branch 202 at the third end of the control branch 201 when the voltage between the first end and the second end of the control branch 201 is greater than the first preset voltage. The control branch 201 is also configured to output a second control signal to the second switch branch 203 at the sixth end of the control branch 201 when the voltage between the fourth end and the fifth end of the control branch 201 is greater than the first preset voltage. Among them, the first preset voltage is a pre-set voltage, which can be set based on the actual application scenario, and the embodiment of the present application does not impose specific restrictions on this. The first switch branch 202 is turned on in response to the first control signal, or the second switch branch 203 is turned on in response to the second control signal to synchronously rectify the voltage of the second coil L2. It can be understood that at the same time, the control branch 201 can only output one of the first control signal and the second control signal, that is, at the same time, only one of the first switch branch 202 and the second switch branch 203 is in the on state. Furthermore, the AC power source connected to the first coil L1 is usually a sine wave, which means that the control branch 201 alternately outputs the first control signal and the second control signal within a period of the sine wave, so that the first switch branch 202 and the second switch branch 203 are alternately turned on, thereby realizing the synchronous rectification function.

[0052] Please refer to Figure 5 , Figure 5 An example is shown with Figure 4 A circuit structure corresponding to the structure shown in FIG. Figure 5 As shown, the control branch includes a signal processing chip U1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1 and a Zener diode DW1.

[0053] Wherein, the first resistor R1 is connected between the first end of the signal processing chip U1 (i.e., the first pin of the signal processing chip U1, the power supply pin of the signal processing chip U1) and the tenth end (i.e., the tenth pin of the signal processing chip U1, the enable pin of the signal processing chip U1), the second resistor R2 is connected between the first end of the signal processing chip U1 and the ninth end (i.e., the ninth pin of the signal processing chip U1), the third resistor R3 is connected between the first end of the signal processing chip U1 and the anode of the Zener diode DW1, the fourth resistor R4 is connected between the first end of the signal processing chip U1 and the cathode of the Zener diode DW1, the cathode of the Zener diode DW1 is connected to the first node N1, the first capacitor C1 is connected between the first end of the signal processing chip U1 and the second end of the signal processing chip U1 (i.e., the second pin of the signal processing chip U1, the ground pin of the signal processing chip U1), the second end of the signal processing chip U1 is grounded GND, the third end of the signal processing chip U1 (i.e., the third pin of the signal processing chip U1, the pin for the signal processing chip U1 to output the second control signal, corresponding to the control branch 20 1) is connected to the second end of the second switch branch 203, the fourth end of the signal processing chip U1 (i.e. the 4th pin of the signal processing chip U1, corresponding to the fifth end of the control branch 201) is connected to the third end of the second switch branch 203, the fifth end of the signal processing chip U1 (i.e. the 5th pin of the signal processing chip U1, corresponding to the fourth end of the control branch 201) is connected to the opposite end of the second sub-coil L22 through the seventh resistor R7 and the eighth resistor R8 in sequence, the eighth end of the signal processing chip U1 (i.e. the 8th pin of the signal processing chip U1, corresponding to the fourth end of the control branch 201) is connected to the second end of the second switch branch 203, the fourth end of the signal processing chip U1 (i.e. the 4th pin of the signal processing chip U1, corresponding to the fifth end of the control branch 201) is connected to the third end of the second switch branch 203, the fifth end of the signal processing chip U1 (i.e. the 5th pin of the signal processing chip U1, corresponding to the fourth end of the control branch 201) is connected to the opposite end of the second sub-coil L22 through the seventh resistor R7 and the eighth resistor R8 in sequence, The pin of the signal processing chip U1 outputting the first control signal, corresponding to the third end of the control branch 201) is connected to the second end of the first switch branch 202, the seventh end of the signal processing chip U1 (i.e. the 7th pin of the signal processing chip U1, corresponding to the second end of the control branch 201) is connected to the third end of the first switch branch 202, and the sixth end of the signal processing chip U1 (i.e. the 6th pin of the signal processing chip U1, corresponding to the first end of the control branch 201) is connected to the same-named end of the first sub-coil L21 through the fifth resistor R5 and the sixth resistor R6 in sequence.

[0054] Specifically, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 are all current limiting resistors. The first capacitor C1 is a filter capacitor. The voltage regulator diode DW1 is used to prevent the voltage input to the signal processing chip U1 from being too large, so as to protect the signal processing chip U1.

[0055] In this embodiment, the control branch 201 further includes a first switch tube Q1, a second switch tube Q2, a ninth resistor R9 and a tenth resistor R10.

[0056] Among them, the first end of the first switch tube Q1 is connected to the first end of the signal processing chip U1 through the ninth resistor R9, the connection point between the fifth resistor R5 and the sixth resistor R6 is connected to the second end of the first switch tube Q1, the third end of the first switch tube Q1 is connected to the same-name end of the first sub-coil L21, the first end of the second switch tube Q2 is connected to the first end of the signal processing chip U1 through the tenth resistor R10, the connection point between the seventh resistor R7 and the eighth resistor R8 is connected to the second end of the second switch tube Q2, and the third end of the second switch tube Q2 is connected to the opposite-name end of the second sub-coil L22.

[0057] Specifically, when the voltage of the first sub-coil L21 is relatively small, the sixth resistor R6 and the fifth resistor R5 can ensure that the voltage input to the sixth terminal of the signal processing chip U1 will not consume the signal processing chip U1. At this time, the connection between the ninth resistor R9 and the first resistor R1 can be disconnected to keep the first switch tube Q1 disconnected, and the voltage of the first sub-coil L21 is input to the sixth terminal of the signal processing chip U1 through the sixth resistor R6 and the fifth resistor R5. When the voltage of the first sub-coil L21 is relatively large, the conduction voltage drop of the first switch tube Q1 is required to ensure that the voltage input to the sixth terminal of the signal processing chip U1 will not consume the signal processing chip U1. At this time, the ninth resistor R9 and the first resistor R1 can be kept connected to keep the first switch tube Q1 turned on, and the voltage of the first sub-coil L21 is input to the sixth terminal of the signal processing chip U1 through the first switch tube Q1 and the fifth resistor R5.

[0058] Similarly, when the voltage of the second sub-coil L22 is relatively small, the eighth resistor R8 and the seventh resistor R7 can ensure that the voltage input to the fifth terminal of the signal processing chip U1 will not consume the signal processing chip U1. At this time, the connection between the tenth resistor R10 and the first resistor R1 can be disconnected to keep the second switch tube Q2 disconnected, and the voltage of the second sub-coil L22 is input to the fifth terminal of the signal processing chip U1 through the eighth resistor R8 and the seventh resistor R7. When the voltage of the second sub-coil L22 is relatively large, the conduction voltage drop of the second switch tube Q2 is required to ensure that the voltage input to the fifth terminal of the signal processing chip U1 will not consume the signal processing chip U1. At this time, the tenth resistor R10 can be kept connected to the first resistor R1 to keep the second switch tube Q2 turned on, and the voltage of the first sub-coil L21 is input to the sixth terminal of the signal processing chip U1 through the first switch tube Q1 and the fifth resistor R5.

[0059] In this embodiment, the first switch tube Q1 and the second switch tube Q2 are both NMOS tubes. The gate of the NMOS tube is the first end of the first switch tube Q1 (the second switch tube Q2), the source of the NMOS tube is the second end of the first switch tube Q1 (the second switch tube Q2), and the drain of the NMOS tube is the third end of the first switch tube Q1 (the second switch tube Q2).

[0060] In addition, the first switch tube Q1 and the second switch tube Q2 can be any controllable switches, such as insulated gate bipolar transistor (IGBT) devices, integrated gate commutated thyristor (IGCT) devices, gate turn-off thyristor (GTO) devices, silicon controlled rectifier (SCR) devices, junction gate field effect transistor (JFET) devices, MOS controlled thyristor (MCT) devices, etc.

[0061] In this embodiment, the first switch branch 202 includes a third switch tube Q3 having a parasitic diode.

[0062] The first end of the third switch tube Q3 is connected to the second end of the control branch 201 , the second end of the third switch tube Q3 is connected to the third end of the control branch 201 , and the third end of the third switch tube Q3 is connected to the same end of the first sub-coil L21 .

[0063] Specifically, when there is current between the second end and the third end of the third switch tube Q3, the current will flow from the anode to the cathode of the parasitic diode of the third switch tube Q3 to generate a voltage at both ends of the parasitic diode of the third switch tube Q3, and the voltage is the voltage between the first end and the second end of the control branch 201 (i.e., the voltage between the 6th pin and the 7th pin of the signal processing chip U1). When the voltage is greater than the first preset voltage, the third end of the control branch 201 (i.e., the 8th pin of the signal processing chip U1) outputs the first control signal to the first end of the third switch tube Q3 to turn on the third switch tube Q3 (corresponding to the first switch branch 202 being turned on).

[0064] In this embodiment, the third switch tube Q3 is an NMOS tube as an example. The gate of the NMOS tube is the first end of the third switch tube Q3, the source of the NMOS tube is the second end of the third switch tube Q3, and the drain of the NMOS tube is the third end of the third switch tube Q3.

[0065] In addition, the third switch tube Q3 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.

[0066] In this embodiment, the first switch branch 202 further includes an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a second capacitor C2 and a first diode D1.

[0067] Among them, the second capacitor C2 and the eleventh resistor R11 are connected in series between the third end and the second end of the third switch tube Q3, the twelfth resistor R12 is connected between the anode of the first diode D1 and the first end of the third switch tube Q3, the cathode of the first diode D1 is connected to the second end of the control branch 201, the fourteenth resistor R14 is connected between the cathode of the first diode D1 and the first end of the third switch tube Q3, the thirteenth resistor R13 is connected between the first end and the second end of the third switch tube Q3, and the second end of the third switch tube Q3 is grounded GND.

[0068] Specifically, the second capacitor C2 and the eleventh resistor R11 are used for filtering. The first diode D1 and the twelfth resistor R12 are used to control the turn-off time of the third switch tube Q3, and the fourteenth resistor R14 is used to control the turn-on time of the third switch tube Q3.

[0069] In this embodiment, the second switch branch 203 includes a fourth switch tube Q4 having a parasitic diode.

[0070] The first end of the fourth switch tube Q4 is connected to the fifth end of the control branch 201 , the second end of the fourth switch tube Q4 is connected to the sixth end of the control branch 201 , and the third end of the fourth switch tube Q4 is connected to the opposite end of the second sub-coil L22 .

[0071] Specifically, when there is current between the second end and the third end of the fourth switch tube Q4, the current will flow from the anode to the cathode of the parasitic diode of the fourth switch tube Q4 to generate a voltage at both ends of the parasitic diode of the fourth switch tube Q4, and the voltage is the voltage between the fourth end and the fifth end of the control branch 201 (i.e., the voltage between the 4th pin and the 5th pin of the signal processing chip U1). When the voltage is greater than the first preset voltage, the sixth end of the control branch 201 (i.e., the 3rd pin of the signal processing chip U1) outputs a second control signal to the first end of the fourth switch tube Q4 to turn on the fourth switch tube Q4 (corresponding to the second switch branch 203 being turned on).

[0072] In this embodiment, the fourth switch tube Q4 is an NMOS tube as an example. The gate of the NMOS tube is the first end of the fourth switch tube Q4, the source of the NMOS tube is the second end of the fourth switch tube Q4, and the drain of the NMOS tube is the third end of the fourth switch tube Q4.

[0073] In addition, the fourth switch tube Q4 can be any controllable switch, such as an insulated gate bipolar transistor (IGBT) device, an integrated gate commutated thyristor (IGCT) device, a gate turn-off thyristor (GTO) device, a silicon controlled rectifier (SCR) device, a junction gate field effect transistor (JFET) device, a MOS controlled thyristor (MCT) device, etc.

[0074] In this embodiment, the second switch branch 203 further includes a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a third capacitor C3 and a second diode D2.

[0075] Among them, the third capacitor C3 and the fifteenth resistor R15 are connected in series between the third end and the second end of the fourth switch tube Q4, the sixteenth resistor R16 is connected between the anode of the second diode D2 and the first end of the fourth switch tube Q4, the cathode of the second diode D2 is connected to the fifth end of the control branch 201, the eighteenth resistor R18 is connected between the cathode of the second diode D2 and the first end of the fourth switch tube Q4, the seventeenth resistor R17 is connected between the first end and the second end of the fourth switch tube Q4, and the second end of the fourth switch tube Q4 is grounded GND.

[0076] Specifically, the third capacitor C3 and the fifteenth resistor R15 are used for filtering. The second diode D2 and the sixteenth resistor R16 are used to control the off time of the fourth switch tube Q4, and the eighteenth resistor R18 is used to control the on time of the fourth switch tube Q4.

[0077] exist Figure 5 In the embodiment shown, the transformer 100 and the rectifier circuit 200 in the power supply device 1000 are arranged on the same printed circuit board. When the power supply device 1000 needs to output a different first voltage VO1, on the one hand, the specification and model of the second coil L2 can be changed; on the other hand, since the magnitude of the first voltage VO1 changes, the voltage and current acting on the third switch tube Q3 and the fourth switch tube Q4 also change accordingly, and the specifications and models of the third switch tube Q3 and the fourth switch tube Q4 need to be changed accordingly, so that the third switch tube Q3 and the fourth switch tube Q4 can withstand the current voltage and current. In short, in this embodiment, the transformer 100 and the rectifier circuit 200 can be reused, and the requirements of various application scenarios can be met by simply adjusting the specifications and models of the second coil L2, the third switch tube Q3 and the fourth switch tube Q4, which has strong practicality.

[0078] The embodiment of the present application further provides an electronic device, which includes a load and a power supply device 1000 in any embodiment of the present application. The power supply device 1000 is connected to the load and is used to supply power to the load.

[0079] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

[0080] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Under the idea of ​​the present application, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order. It should be understood by ordinary technicians in this field that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A transformer, characterized in that: include: A skeleton shell, a first magnetic core component, a second magnetic core component, a double-slot skeleton, a first coil and a second coil; The skeleton shell is provided with a receiving groove and a first opening and a second opening communicating with the receiving groove, wherein the first opening and the second opening are arranged opposite to each other; The double-slot frame is received in the receiving slot, and the double-slot frame is provided with a through hole; The magnetic core of the first magnetic core component passes through the bottom of the receiving groove and is received in one end of the through hole, and the magnetic core of the second magnetic core component is received in the other end of the through hole; The double-groove frame is provided with a first groove and a second groove, and the first groove and the second groove are both provided around the through hole; The first coil ring is disposed in the first groove, the second coil ring is disposed in the second groove, the first coil portion is exposed in the first opening and the second opening, and the second coil portion is exposed in the first opening and the second opening.

2. A power supply device, characterized in that: include: Printed circuit boards; The transformer according to claim 1, wherein the transformer is arranged on the printed circuit board; The rectifier circuit is disposed on the printed circuit board and connected to the transformer, and is configured to synchronously rectify the voltage of the second coil in the transformer so that the power supply device outputs a first voltage.

3. The power supply device according to claim 2, characterized in that: The first coil of the transformer is the primary side, the second coil of the transformer is the secondary side, the second coil includes a first sub-coil and a second sub-coil, the opposite-name end of the first sub-coil and the same-name end of the second sub-coil are connected to a first node, and the first node outputs the first voltage; The rectifier circuit comprises a control branch, a first switch branch and a second switch branch, wherein the first end of the control branch is connected to the first end of the first switch branch and the same-name end of the first sub-coil respectively, the second end of the control branch is connected to the second end of the first switch branch, the third end of the control branch is connected to the third end of the first switch branch, the fourth end of the control branch is connected to the first end of the second switch branch and the opposite-name end of the second sub-coil respectively, the fifth end of the control branch is connected to the second end of the second switch branch, and the sixth end of the control branch is connected to the third end of the second switch branch; The control branch is configured to output a first control signal at its third terminal when the voltage between the first terminal and the second terminal is greater than a first preset voltage, and is configured to output a second control signal at its sixth terminal when the voltage between the fourth terminal and the fifth terminal is greater than the first preset voltage; The first switch branch is turned on in response to the first control signal, or the second switch branch is turned on in response to the second control signal, to synchronously rectify the voltage of the second coil.

4. The power supply device according to claim 3, characterized in that: The control branch includes a signal processing chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor and a voltage-stabilizing diode; The first resistor is connected between the first end and the tenth end of the signal processing chip, the second resistor is connected between the first end and the ninth end of the signal processing chip, the third resistor is connected between the first end of the signal processing chip and the anode of the voltage-regulating diode, the fourth resistor is connected between the first end of the signal processing chip and the cathode of the voltage-regulating diode, the cathode of the voltage-regulating diode is connected to the first node, the first capacitor is connected between the first end of the signal processing chip and the second end of the signal processing chip, the second end of the signal processing chip is grounded, the third end of the signal processing chip is connected to the second end of the second switch branch, the fourth end of the signal processing chip is connected to the third end of the second switch branch, the fifth end of the signal processing chip is connected to the opposite end of the second sub-coil through the seventh resistor and the eighth resistor in sequence, the eighth end of the signal processing chip is connected to the second end of the first switch branch, the seventh end of the signal processing chip is connected to the third end of the first switch branch, and the sixth end of the signal processing chip is connected to the same end of the first sub-coil through the fifth resistor and the sixth resistor in sequence.

5. The power supply device according to claim 4, characterized in that: The control branch further includes a first switch tube, a second switch tube, a ninth resistor and a tenth resistor; The first end of the first switch tube is connected to the first end of the signal processing chip through the ninth resistor, the connection point between the fifth resistor and the sixth resistor is connected to the second end of the first switch tube, the third end of the first switch tube is connected to the same-name end of the first sub-coil, the first end of the second switch tube is connected to the first end of the signal processing chip through the tenth resistor, the connection point between the seventh resistor and the eighth resistor is connected to the second end of the second switch tube, and the third end of the second switch tube is connected to the opposite-name end of the second sub-coil.

6. The power supply device according to claim 3, characterized in that: The first switch branch includes a third switch tube having a parasitic diode; The first end of the third switch tube is connected to the second end of the control branch, the second end of the third switch tube is connected to the third end of the control branch, and the third end of the third switch tube is connected to the same end of the first sub-coil.

7. The power supply device according to claim 6, characterized in that: The first switch branch further includes an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a second capacitor and a first diode; The second capacitor and the eleventh resistor are connected in series between the third end and the second end of the third switch tube, the twelfth resistor is connected between the anode of the first diode and the first end of the third switch tube, the cathode of the first diode is connected to the second end of the control branch, the fourteenth resistor is connected between the cathode of the first diode and the first end of the third switch tube, the thirteenth resistor is connected between the first end and the second end of the third switch tube, and the second end of the third switch tube is grounded.

8. The power supply device according to claim 3, characterized in that: The second switch branch includes a fourth switch tube having a parasitic diode; The first end of the fourth switch tube is connected to the fifth end of the control branch, the second end of the fourth switch tube is connected to the sixth end of the control branch, and the third end of the fourth switch tube is connected to the opposite end of the second sub-coil.

9. The power supply device according to claim 8, characterized in that: The second switch branch further includes a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a third capacitor and a second diode; The third capacitor and the fifteenth resistor are connected in series between the third end and the second end of the fourth switch tube, the sixteenth resistor is connected between the anode of the second diode and the first end of the fourth switch tube, the cathode of the second diode is connected to the fifth end of the control branch, the eighteenth resistor is connected between the cathode of the second diode and the first end of the fourth switch tube, the seventeenth resistor is connected between the first end and the second end of the fourth switch tube, and the second end of the fourth switch tube is grounded.

10. An electronic device, characterized in that: It comprises a load and a power supply device as described in any one of claims 2 to 9, wherein the power supply device is connected to the load and is used to supply power to the load.

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