RCC self-excitation push-pull magnetic isolation power supply circuit and power supply device

Abstract

The utility model relates to power supply circuit technical field especially relates to a kind of RCC self-excitation push-pull magnetic isolation power supply circuit and power supply device, and the RCC self-excitation push-pull magnetic isolation power supply circuit includes: primary circuit, secondary circuit and transformer;The primary circuit is connected the secondary circuit by the transformer;The primary circuit includes the first magnetic isolation power supply transformer primary winding and the second magnetic isolation power supply transformer primary winding wound on the transformer, and the secondary circuit includes the isolation power supply transformer secondary winding wound on the transformer.The RCC self-excitation push-pull circuit of the utility model can stably and reliably provide auxiliary power supply, saves the cost of raw material, with less device, lower air consumption and smaller space ratio as the price, realizes the auxiliary power supply scheme of providing magnetic isolation for anti-radiation power supply.

Description

Technical Field

[0001] This utility model relates to the field of power supply circuit technology, and in particular to an RCC self-excited push-pull magnetic isolation power supply circuit and power supply device. Background Technology

[0002] Currently, the magnetic isolation and radiation-resistant solutions for switching power supplies face limitations when using secondary-side control mode. These limitations are due to the high cost of radiation-resistant auxiliary power supply chips, or the fact that they are not entirely domestically produced, which increases the cost of raw materials.

[0003] Therefore, there is an urgent need to provide a technical solution to address the above problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an RCC self-excited push-pull magnetic isolation power supply circuit and power supply device.

[0005] In a first aspect, this utility model provides an RCC self-excited push-pull magnetically isolated power supply circuit, the technical solution of which is as follows:

[0006] It includes: a primary circuit, a secondary circuit, and a transformer; the primary circuit is connected to the secondary circuit through the transformer;

[0007] The primary circuit includes a first magnetically isolated power supply transformer primary winding NX and a second magnetically isolated power supply transformer primary winding NY wound on the transformer. The secondary circuit includes an isolation power supply transformer secondary winding NZ wound on the transformer. The winding turns ratio between the first magnetically isolated power supply transformer primary winding NX, the second magnetically isolated power supply transformer primary winding NY, and the isolation power supply transformer secondary winding NZ is 12:2:14.

[0008] The beneficial effects of this utility model's RCC self-excited push-pull magnetically isolated power supply circuit are as follows:

[0009] The RCC self-excited push-pull circuit of this invention can provide auxiliary power supply stably and reliably, saving the cost of raw materials. It achieves a magnetically isolated auxiliary power supply solution for radiation-resistant power supplies at the cost of fewer components, lower energy consumption and smaller space ratio.

[0010] Based on the above solution, the RCC self-excited push-pull magnetic isolation power supply circuit of this utility model can be further improved as follows.

[0011] In one alternative embodiment, the primary winding NX of the first magnetically isolated power supply transformer includes: a first winding coil X3-X4 and a second winding coil X5-X6, wherein the connection between the first winding coil X3-X4 and the second winding coil X5-X6 is a first center tap X4X5.

[0012] The primary winding NY of the second magnetically isolated power supply transformer includes: a third winding coil X7-X8 and a fourth winding coil X9-X10, and the connection between the third winding coil X7-X8 and the fourth winding coil X9-X10 is the second center tap X8X9;

[0013] The secondary winding NY of the isolation power supply transformer includes: a fifth winding Y5-Y6 and a sixth winding Y7-Y8, and the connection between the fifth winding Y5-Y6 and the sixth winding Y7-Y8 is the third center tap Y6Y7.

[0014] In one alternative embodiment, the primary-side circuit further includes: NPN transistor Q5, NPN transistor Q6, resistor R10, resistor R11, resistor R8, capacitor C11, and capacitor C14.

[0015] The collector of the NPN transistor Q5 is connected to the X3 terminal of the first wound coil X3-X4, the emitter of the NPN transistor Q5 is connected to the ground terminal PGND, the base of the NPN transistor Q5 is connected to one end of the resistor R11, and the other end of the resistor R11 is connected to the X10 terminal of the fourth wound coil X9-X10.

[0016] The collector of the NPN transistor Q6 is connected to the X6 end of the second winding coil X5-X6, the emitter of the NPN transistor Q6 is connected to the ground terminal PGND, the base of the NPN transistor Q6 is connected to one end of the resistor R10, and the other end of the resistor R10 is connected to the X7 end of the third winding coil X7-X8.

[0017] The resistor R8 is connected to one end of the capacitor C11. The connection between the resistor R8 and the capacitor C11 is also connected to the second center tap X8X9. The other end of the capacitor C11 is connected to the ground terminal PGND. The other end of the resistor R8 is connected to the first center tap X4X5.

[0018] In one alternative embodiment, the primary-side circuit further includes a power supply VCC terminal;

[0019] The power supply VCC terminal is connected to the first center tap X4X5.

[0020] In an alternative embodiment, the secondary circuit further includes: Zener diode Z3, diode D7, diode D8, capacitor C17, capacitor C18, capacitor C19, capacitor C22, resistor R18, and NPN transistor Q8.

[0021] The anode of diode D7 is connected to Y5 of the fifth winding coil Y5-Y6, and the cathode of diode D7 is connected to diode D8.

[0022] The anode of diode D8 is connected to Y8 of the sixth winding Y7-Y8, the cathode of diode D8 is connected to the cathode of diode D7, and the third center tap Y6Y7 is connected to the ground terminal SGND.

[0023] One end of capacitor C17 is connected to the cathode of diode D7, the cathode of diode D8, capacitor C19, resistor R18, and the collector of NPN transistor Q8. The other end of capacitor C17 is connected to the anode of Zener diode Z3, capacitor C22, and ground terminal SGND. Capacitor C19 is also connected to the third center tap Y6Y7. Resistor R18 is also connected to the cathode of Zener diode Z3, capacitor C22, and the base of NPN transistor Q8. Capacitor C22 is also connected to ground terminal SGND. One end of capacitor C18 is connected to ground terminal SGND.

[0024] In one alternative embodiment, the secondary circuit further includes an output terminal SVCC;

[0025] The output terminal SVCC is connected to the capacitor C18 and the emitter of the NPN transistor Q8, respectively.

[0026] In one alternative embodiment, the X3 end of the first wound coil X3-X4 is the same-name end to the opposite-name end relative to the first center tap X4X5; the first center tap X4X5 is the same-name end to the opposite-name end relative to the X6 end of the second wound coil X5-X6.

[0027] In one alternative embodiment, the X7 end of the third wound coil X7-X8 is the same end to the opposite end relative to the second center tap X8X9; the second center tap X8X9 is the same end to the opposite end relative to the X10 end of the fourth wound coil X9-X10.

[0028] In one alternative embodiment, the Y5 end of the fifth wound coil Y5-Y6 is the same-name end to the opposite-name end relative to the third center tap Y6Y7; the third center tap Y6Y7 is the same-name end to the opposite-name end relative to the Y8 end of the sixth wound coil Y7-Y8.

[0029] Secondly, this utility model provides a power supply device, which includes the RCC self-excited push-pull magnetic isolation power supply circuit of this utility model.

[0030] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0031] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0032] Figure 1 This is a schematic diagram of an embodiment of an RCC self-excited push-pull magnetically isolated power supply circuit according to this utility model. Detailed Implementation

[0033] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein.

[0034] Figure 1 A schematic diagram of an embodiment of an RCC self-excited push-pull magnetically isolated power supply circuit provided by this utility model is shown. Figure 1 As shown, the RCC self-excited push-pull magnetically isolated power supply circuit includes: a primary circuit, a secondary circuit, and a transformer T2; the primary circuit is connected to the secondary circuit through the transformer T2.

[0035] The primary circuit includes a first magnetically isolated power supply transformer primary winding NX and a second magnetically isolated power supply transformer primary winding NY wound on the transformer T2. The secondary circuit includes an isolation power supply transformer secondary winding NZ wound on the transformer T2. The winding turns ratio between the first magnetically isolated power supply transformer primary winding NX, the second magnetically isolated power supply transformer primary winding NY, and the isolation power supply transformer secondary winding NZ is 12:2:14.

[0036] In one alternative embodiment, the primary winding NX of the first magnetically isolated power supply transformer includes: a first winding coil X3-X4 and a second winding coil X5-X6, wherein the connection between the first winding coil X3-X4 and the second winding coil X5-X6 is a first center tap X4X5.

[0037] The primary winding NY of the second magnetically isolated power supply transformer includes: a third winding coil X7-X8 and a fourth winding coil X9-X10, and the connection between the third winding coil X7-X8 and the fourth winding coil X9-X10 is the second center tap X8X9;

[0038] The secondary winding NY of the isolation power supply transformer includes: a fifth winding Y5-Y6 and a sixth winding Y7-Y8, and the connection between the fifth winding Y5-Y6 and the sixth winding Y7-Y8 is the third center tap Y6Y7.

[0039] In one alternative embodiment, the primary-side circuit further includes: NPN transistor Q5, NPN transistor Q6, resistor R10, resistor R11, resistor R8, capacitor C11, and capacitor C14.

[0040] The collector of the NPN transistor Q5 is connected to the X3 terminal of the first wound coil X3-X4, the emitter of the NPN transistor Q5 is connected to the ground terminal PGND, the base of the NPN transistor Q5 is connected to one end of the resistor R11, and the other end of the resistor R11 is connected to the X10 terminal of the fourth wound coil X9-X10.

[0041] The collector of the NPN transistor Q6 is connected to the X6 end of the second winding coil X5-X6, the emitter of the NPN transistor Q6 is connected to the ground terminal PGND, the base of the NPN transistor Q6 is connected to one end of the resistor R10, and the other end of the resistor R10 is connected to the X7 end of the third winding coil X7-X8.

[0042] The resistor R8 is connected to one end of the capacitor C11. The connection between the resistor R8 and the capacitor C11 is also connected to the second center tap X8X9. The other end of the capacitor C11 is connected to the ground terminal PGND. The other end of the resistor R8 is connected to the first center tap X4X5.

[0043] In one alternative embodiment, the primary-side circuit further includes a power supply VCC terminal;

[0044] The power supply VCC terminal is connected to the first center tap X4X5.

[0045] In an alternative embodiment, the secondary circuit further includes: Zener diode Z3, diode D7, diode D8, capacitor C17, capacitor C18, capacitor C19, capacitor C22, resistor R18, and NPN transistor Q8.

[0046] The anode of diode D7 is connected to Y5 of the fifth winding coil Y5-Y6, and the cathode of diode D7 is connected to diode D8.

[0047] The anode of diode D8 is connected to Y8 of the sixth winding Y7-Y8, the cathode of diode D8 is connected to the cathode of diode D7, and the third center tap Y6Y7 is connected to the ground terminal SGND.

[0048] One end of capacitor C17 is connected to the cathode of diode D7, the cathode of diode D8, capacitor C19, resistor R18, and the collector of NPN transistor Q8. The other end of capacitor C17 is connected to the anode of Zener diode Z3, capacitor C22, and ground terminal SGND. Capacitor C19 is also connected to the third center tap Y6Y7. Resistor R18 is also connected to the cathode of Zener diode Z3, capacitor C22, and the base of NPN transistor Q8. Capacitor C22 is also connected to ground terminal SGND. One end of capacitor C18 is connected to ground terminal SGND.

[0049] In one alternative embodiment, the secondary circuit further includes an output terminal SVCC;

[0050] The output terminal SVCC is connected to the capacitor C18 and the emitter of the NPN transistor Q8, respectively.

[0051] In one alternative embodiment, the X3 end of the first wound coil X3-X4 is the same-name end to the opposite-name end relative to the first center tap X4X5; the first center tap X4X5 is the same-name end to the opposite-name end relative to the X6 end of the second wound coil X5-X6.

[0052] In one alternative embodiment, the X7 end of the third wound coil X7-X8 is the same end to the opposite end relative to the second center tap X8X9; the second center tap X8X9 is the same end to the opposite end relative to the X10 end of the fourth wound coil X9-X10.

[0053] In one alternative embodiment, the Y5 end of the fifth wound coil Y5-Y6 is the same-name end to the opposite-name end relative to the third center tap Y6Y7; the third center tap Y6Y7 is the same-name end to the opposite-name end relative to the Y8 end of the sixth wound coil Y7-Y8.

[0054] In this embodiment, the input voltage of the power supply VCC terminal of the RCC self-excited push-pull magnetically isolated power supply circuit is 12V. The power supply VCC terminal charges the second center tap X8X9 through resistor R8 and capacitor C11. The second center tap X8X9 charges the bases of NPN transistors Q5 and Q6 through resistors R11 and R10. Due to the inconsistency of the base injection current of NPN transistors Q5 and Q6, one of NPN transistors Q5 and Q6 conducts before the other. If NPN transistor Q5 conducts first, that is, the X10 terminal is at a high level first, since the winding polarity of the primary winding of the magnetically isolated power supply transformer X10 and X3 are opposite terminals, X3 is at a low level, that is, NPN transistor Q5 conducts; while for NPN transistor Q6 at this time, since the X7 terminal is at a low level and the X6 terminal is at a high level, that is, NPN transistor Q6 does not conduct. This is equivalent to the induced electromotive force generated when NPN transistor Q5 is turned on suppressing the conduction of NPN transistor Q6. When the rate of change of the conduction current of NPN transistor Q5 is 0, according to Lenz's law, the electromotive force will reverse, and NPN transistor Q6 will turn on, thus suppressing the conduction of NPN transistor Q5. This process repeats, achieving the alternating conduction of the two transistors and realizing the purpose of self-excited oscillation. This is equivalent to the primary side of the magnetically isolated power supply transformer providing an oscillating square wave signal, inducing two complementary square waves on the secondary side. These square waves are then synthesized by diodes D7 and D8 to form a stable power supply level (approximately 14V) at the output terminal SVCC, which powers the secondary side main control chip circuit.

[0055] It should be noted that, taking the first wound coil X3-X4 as an example, X3 and X4 represent the two winding endpoints of the wound coil. Taking the first center tap X4X5 as an example, X4X5 represents the connection point of the two wound coils, that is, the center tap X4X5 formed by the relative overlap of X4 and X5.

[0056] The technical solution of this embodiment can provide auxiliary power supply stably and reliably, saving the cost of raw materials. It achieves a magnetically isolated auxiliary power supply solution for radiation-resistant power supplies at the cost of fewer components, lower energy consumption and smaller space ratio.

[0057] This utility model provides a power supply device, including the RCC self-excited push-pull magnetic isolation power supply circuit as provided in this utility model.

[0058] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure involved in this utility model is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

[0059] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and represent a limitation on a specific order or sequence. Where appropriate, the order of use for similar objects can be interchanged so that the embodiments of this application described herein can be implemented in an order other than that shown or described.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An RCC self-excited push-pull magnetically isolated power supply circuit, characterized in that, include: A primary circuit, a secondary circuit, and a transformer; the primary circuit is connected to the secondary circuit via the transformer. The primary circuit includes a first magnetically isolated power supply transformer primary winding NX and a second magnetically isolated power supply transformer primary winding NY wound on the transformer. The secondary circuit includes an isolation power supply transformer secondary winding NZ wound on the transformer. The winding turns ratio between the first magnetically isolated power supply transformer primary winding NX, the second magnetically isolated power supply transformer primary winding NY, and the isolation power supply transformer secondary winding NZ is 12:2:

14.

2. The RCC self-excited push-pull magnetically isolated power supply circuit according to claim 1, characterized in that, The primary winding NX of the first magnetically isolated power supply transformer includes: a first winding coil X3-X4 and a second winding coil X5-X6, and the connection between the first winding coil X3-X4 and the second winding coil X5-X6 is a first center tap X4X5; The primary winding NY of the second magnetically isolated power supply transformer includes: a third winding coil X7-X8 and a fourth winding coil X9-X10, and the connection between the third winding coil X7-X8 and the fourth winding coil X9-X10 is the second center tap X8X9; The secondary winding NY of the isolation power supply transformer includes: a fifth winding Y5-Y6 and a sixth winding Y7-Y8, and the connection between the fifth winding Y5-Y6 and the sixth winding Y7-Y8 is the third center tap Y6Y7.

3. The RCC self-excited push-pull magnetically isolated power supply circuit according to claim 2, characterized in that, The primary circuit also includes: NPN transistor Q5, NPN transistor Q6, resistor R10, resistor R11, resistor R8, capacitor C11 and capacitor C14. The collector of the NPN transistor Q5 is connected to the X3 terminal of the first wound coil X3-X4, the emitter of the NPN transistor Q5 is connected to the ground terminal PGND, the base of the NPN transistor Q5 is connected to one end of the resistor R11, and the other end of the resistor R11 is connected to the X10 terminal of the fourth wound coil X9-X10. The collector of the NPN transistor Q6 is connected to the X6 end of the second winding coil X5-X6, the emitter of the NPN transistor Q6 is connected to the ground terminal PGND, the base of the NPN transistor Q6 is connected to one end of the resistor R10, and the other end of the resistor R10 is connected to the X7 end of the third winding coil X7-X8. The resistor R8 is connected to one end of the capacitor C11. The connection between the resistor R8 and the capacitor C11 is also connected to the second center tap X8X9. The other end of the capacitor C11 is connected to the ground terminal PGND. The other end of the resistor R8 is connected to the first center tap X4X5.

4. The RCC self-excited push-pull magnetically isolated power supply circuit according to claim 3, characterized in that, The primary-side circuit also includes: a power supply VCC terminal; The power supply VCC terminal is connected to the first center tap X4X5.

5. The RCC self-excited push-pull magnetically isolated power supply circuit according to claim 2, characterized in that, The secondary circuit also includes: Zener diode Z3, diode D7, diode D8, capacitor C17, capacitor C18, capacitor C19, capacitor C22, resistor R18 and NPN transistor Q8. The anode of diode D7 is connected to Y5 of the fifth winding coil Y5-Y6, and the cathode of diode D7 is connected to diode D8. The anode of diode D8 is connected to Y8 of the sixth winding Y7-Y8, the cathode of diode D8 is connected to the cathode of diode D7, and the third center tap Y6Y7 is connected to the ground terminal SGND. One end of capacitor C17 is connected to the cathode of diode D7, the cathode of diode D8, capacitor C19, resistor R18, and the collector of NPN transistor Q8. The other end of capacitor C17 is connected to the anode of Zener diode Z3, capacitor C22, and ground terminal SGND. Capacitor C19 is also connected to the third center tap Y6Y7. Resistor R18 is also connected to the cathode of Zener diode Z3, capacitor C22, and the base of NPN transistor Q8. Capacitor C22 is also connected to ground terminal SGND. One end of capacitor C18 is connected to ground terminal SGND.

6. The RCC self-excited push-pull magnetically isolated power supply circuit according to claim 5, characterized in that, The secondary circuit also includes: an output terminal SVCC; The output terminal SVCC is connected to the capacitor C18 and the emitter of the NPN transistor Q8, respectively.

7. The RCC self-excited push-pull magnetically isolated power supply circuit according to claim 2, characterized in that, The X3 end of the first wound coil X3-X4 is the same-name end to the opposite-name end relative to the first center tap X4X5; the first center tap X4X5 is the same-name end to the opposite-name end relative to the X6 end of the second wound coil X5-X6.

8. The RCC self-excited push-pull magnetically isolated power supply circuit according to claim 2, characterized in that, The X7 end of the third winding coil X7-X8 is the same end to the opposite end relative to the second center tap X8X9; the second center tap X8X9 is the same end to the opposite end relative to the X10 end of the fourth winding coil X9-X10.

9. The RCC self-excited push-pull magnetically isolated power supply circuit according to claim 2, characterized in that, The Y5 end of the fifth winding coil Y5-Y6 is the same-name end to the opposite-name end relative to the third center tap Y6Y7; the third center tap Y6Y7 is the same-name end to the opposite-name end relative to the Y8 end of the sixth winding coil Y7-Y8.

10. A power supply device, characterized in that, Includes the RCC self-excited push-pull magnetically isolated power supply circuit as described in any one of claims 1-9.

Images