Auxiliary power supply circuit structure of audio power module

Abstract

The utility model relates to the field of audio power supplies, in particular to an auxiliary power supply circuit structure of an audio power supply module, which is characterized by comprising a double-transistor flyback circuit and a voltage transformation circuit module, and the input end of the voltage transformation circuit module is electrically connected with the output end of the double-transistor flyback circuit. The application of the utility model not only can greatly reduce the interference to the power supply of the main power supply, but also can improve the output power and efficiency, can enable the output current and voltage to be very stable, can ensure that the heating temperature is small, and can achieve the purpose of auxiliary power supply very stably.

Description

Technical Field

[0001] The utility model relates to the field of audio power supply, in particular to an auxiliary power supply circuit structure of an audio power supply module. Background Art

[0002] Currently, audio power supply circuits have emerged that combine an input rectifier circuit, an input filter circuit, a transformer circuit, an output rectifier circuit, and an output filter circuit in series. Furthermore, to achieve auxiliary power supply, an auxiliary power supply has been connected to the transformer circuit (for example, as disclosed in Chinese Patent Publication No. CN205945657U). While this approach achieves the auxiliary power supply goal, most existing auxiliary power supplies are directly output after rectification and filtering. This not only easily interferes with the operating performance of the transformer circuit but also can lead to issues such as insufficient output power, low efficiency, unstable current and voltage, and high temperatures, which can easily cause instability in the auxiliary power supply. Therefore, it is highly desirable to design an auxiliary power supply circuit structure for an audio power supply module to address these technical issues. Utility Model Content

[0003] The purpose of the present utility model is to solve the above-mentioned problems and shortcomings and to provide an auxiliary power supply circuit structure for an audio power supply module. The application of this auxiliary power supply circuit structure can not only greatly reduce the interference with the main power supply, but also help to improve the output power and efficiency, and can make the output current and voltage very stable, and can ensure low heating temperature, which can achieve the purpose of auxiliary power supply in an extremely stable manner.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] An auxiliary power supply circuit structure for an audio power module is characterized by comprising a dual-tube flyback circuit and a voltage transformer circuit module, wherein the input end of the voltage transformer circuit module is electrically connected to the output end of the dual-tube flyback circuit; and the input end of the dual-tube flyback circuit is connected to a surge and short-circuit protection circuit.

[0006] Preferably, a high-voltage balancing circuit is connected to the output end of the surge and short-circuit protection circuit.

[0007] Preferably, the auxiliary power supply circuit structure of the audio power module further includes a PWM control circuit and a drive control circuit, and the drive control circuit is connected in series between the PWM control circuit and the dual-switch flyback circuit.

[0008] Preferably, the drive control circuit drives the dual-switch flyback circuit via a drive transformer.

[0009] Preferably, the PWM control circuit is connected to a sampling feedback control circuit.

[0010] Preferably, the output end of the voltage conversion circuit module is connected to one, two, three or four of an operational amplifier power supply circuit, a DSP drive power supply circuit, a PWM drive power supply circuit and a fan power supply circuit.

[0011] Preferably, the operational amplifier power supply circuit, the DSP drive power supply circuit, the PWM drive power supply circuit, and the fan power supply circuit are all rectifier and filter circuits.

[0012] Preferably, the voltage conversion circuit module is connected to a series voltage stabilization circuit.

[0013] Preferably, an auxiliary power supply startup circuit and an overvoltage protection circuit are sequentially connected in series to the input end of the dual-switch flyback circuit.

[0014] The beneficial effects of this utility model include: the auxiliary power supply circuit structure includes an independent voltage conversion circuit module, which does not need to be connected to the main power conversion circuit of the audio power supply, thereby greatly reducing interference with the main power supply. By providing a dual-transistor flyback circuit and electrically connecting the input end of the voltage conversion circuit module with the output end of the dual-transistor flyback circuit, this not only helps to improve output power and efficiency, but also ensures that the output current and voltage are very stable and the heat generation temperature is kept low. This auxiliary power supply circuit structure can achieve the purpose of extremely stable auxiliary power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the circuit structure of the auxiliary power supply circuit structure in the utility model.

[0016] Figure 2 This is a circuit diagram of the surge protection and short-circuit prevention circuit and the high-voltage balancing circuit in the utility model.

[0017] Figure 3 This is a circuit diagram of the dual-tube flyback circuit and the voltage conversion circuit module in the utility model.

[0018] Figure 4 This is a circuit diagram of a dual-tube flyback circuit in the present invention.

[0019] Figure 5 This is a circuit diagram of the PWM control circuit in the present utility model.

[0020] Figure 6 This is a circuit diagram of the drive control circuit in the present utility model.

[0021] Figure 7 This is a circuit diagram of the sampling feedback control circuit in the present invention.

[0022] Figure 8 This is one of the circuit diagrams of the series voltage stabilizing circuit in the present utility model.

[0023] Figure 9 This is the second circuit diagram of the series voltage stabilizing circuit in the present utility model.

[0024] Figure 10 This is the third circuit diagram of the series voltage stabilizing circuit in the present utility model.

[0025] Figure 11 This is the fourth circuit diagram of the series voltage stabilizing circuit in the present utility model.

[0026] Figure 12 This is a circuit diagram of the auxiliary power supply startup circuit and the overvoltage protection circuit in the utility model. DETAILED DESCRIPTION

[0027] like Figure 1 and Figure 3 As shown, the auxiliary power supply circuit structure of an audio power module described in the present invention includes a dual-tube flyback circuit 1 and a transformer circuit module 2, wherein the input end of the transformer circuit module 2 is electrically connected to the output end of the dual-tube flyback circuit 1.

[0028] This auxiliary power supply circuit structure features an independent transformer circuit module 2, which doesn't need to be connected to the main audio power transformer circuit. This significantly reduces interference with the main power supply. By providing a dual-transistor flyback circuit 1 and electrically connecting the input of transformer circuit module 2 to the output of the dual-transistor flyback circuit 1, this not only improves output power and efficiency but also ensures stable output current and voltage, and minimizes heat generation. This auxiliary power supply circuit structure provides extremely stable auxiliary power supply.

[0029] like Figure 3 and Figure 4As shown, the dual-tube flyback circuit 1 includes a first MOS tube 11 and a second MOS tube 12. The source of the first MOS tube 11 and the drain of the second MOS tube 12 are respectively connected to different input terminals of the voltage conversion circuit module 2. A first diode 13 is connected in series between the drain of the first MOS tube 11 and the drain of the second MOS tube 12. A first grounding wire 14 is connected to the source of the first MOS tube 11. A second diode 141 is connected in series to the first grounding wire 14. A first capacitor 111 is connected in series between the drain of the first MOS tube 11 and the source thereof. A first capacitor 111 is connected in series between the drain of the second MOS tube 12 and the source thereof. A second capacitor 121 is connected in series, a first resistor 112 is connected in series between the gate of the first MOS transistor 11 and its source, a second resistor 122 is connected in series between the gate of the second MOS transistor 12 and its source, a second grounding wire 123 is connected to the source of the second MOS transistor 12, a third resistor 124 is connected in series to the second grounding wire 123, a first limiter circuit 15 and a second limiter circuit 16 are connected to the gates of the first MOS transistor 11 and the second MOS transistor 12, respectively, a wire 125 is connected to the source of the second MOS transistor 12, and a fourth resistor 126 is connected in series to the wire 125. This makes the dual-transistor flyback circuit 1 very stable and reliable, thereby helping to further improve the performance of the auxiliary power supply circuit structure.

[0030] like Figure 4 As shown, the first limiting circuit 15 and the second limiting circuit 16 include a third diode 151, a fifth resistor 152, and a sixth resistor 153. The third diode 151 and the fifth resistor 152 are connected in series and then in parallel with the sixth resistor 153. Such a limiting circuit is very simple and reliable, which is not only convenient to manufacture but also has a very stable limiting effect.

[0031] like Figure 1 and Figure 2 As shown, the input end of the dual-tube flyback circuit 1 is connected to an anti-surge and anti-short-circuit circuit 3. This can achieve the purpose of anti-surge and anti-short-circuit, thereby helping to improve the service life and safety.

[0032] In actual use, the surge and short-circuit protection circuit 3 is connected to the input filter circuit, which is connected to the AC mains via the input rectifier circuit. This not only allows the auxiliary power supply circuit structure to be powered by the AC mains, but also prevents the auxiliary power supply circuit structure from interfering with the performance of the main transformer circuit on the audio power module, thereby effectively improving the performance of the audio power module.

[0033] like Figure 1 and Figure 2As shown, the output end of the surge and short-circuit protection circuit 3 is connected to a high-voltage balancing circuit 4. This helps to improve the stability during operation, thereby helping to further improve the performance of the auxiliary power supply circuit structure.

[0034] like Figure 1 、 Figure 5 and Figure 6 As shown, the auxiliary power supply circuit structure of the audio power module also includes a PWM control circuit 5 and a drive control circuit 6. The drive control circuit 6 is connected in series between the PWM control circuit 5 and the dual-switch flyback circuit 1. This can make the output of the auxiliary power supply circuit structure more stable, thereby helping to further improve the reliability of the auxiliary power supply circuit structure.

[0035] like Figure 6 As shown, the drive control circuit 6 drives the dual-switch flyback circuit 1 through the drive transformer. This can effectively increase the output power, which can make the output power reach 200W, which can more effectively improve the performance of the auxiliary power supply circuit structure.

[0036] like Figure 1 and Figure 7 As shown, the PWM control circuit 5 is connected to a sampling feedback control circuit 7. This can provide sampling feedback for the output power, so that the PWM control circuit 5 can achieve the control purpose more accurately and stably, thereby making the power supply of the auxiliary power supply circuit structure very stable and accurate.

[0037] like Figure 1 and Figure 3 As shown, the output end of the voltage conversion circuit module 2 is connected to one, two, three, or four of the following: an op amp power supply circuit 8, a DSP drive power supply circuit 9, a PWM drive power supply circuit 10, and a fan power supply circuit 20. This can meet the power supply requirements of the relevant modules of the audio device and ensure a very stable power supply, thus effectively meeting the needs of actual use.

[0038] like Figure 3 As shown, the operational amplifier power supply circuit 8, DSP drive power supply circuit 9, PWM drive power supply circuit 10, and fan power supply circuit 20 are all rectifier and filter circuits. This can make the output very stable and accurate, thereby helping to further improve the reliability and applicability of the auxiliary power supply circuit structure.

[0039] like Figure 1 、 Figures 8 to 11 As shown, a series voltage stabilizing circuit 30 is connected to the voltage conversion circuit module 2. This can achieve the purpose of voltage stabilization, thereby making the output of the auxiliary power supply circuit structure very stable, thereby helping to further improve the reliability and applicability of the auxiliary power supply circuit structure.

[0040] like Figure 1 As shown, the same number of series voltage stabilizing circuits 30 are provided on the output end of the transformer circuit module 2 as there are power supply circuits, so that the voltage stabilizing purpose of each power supply circuit can be achieved through these series voltage stabilizing circuits 30, thereby meeting the needs of actual manufacturing and use.

[0041] like Figure 1 and Figure 12 As shown, the input end of the dual-switch flyback circuit 1 is connected in series with an auxiliary power startup circuit 40 and an overvoltage protection circuit 50. This facilitates stable startup and overvoltage protection, thereby further improving stability and safety in use.

[0042] like Figure 2 As shown, the voltage conversion circuit module 2 is a transformer, which not only can easily and conveniently form the voltage conversion circuit module 2, but also can ensure that the voltage conversion is very accurate and stable, thereby making the auxiliary power supply circuit structure have very high reliability and applicability.

[0043] In the actual manufacturing process, Figures 1 to 12 The auxiliary power supply circuit structure is constructed using the circuit structure shown, which can meet the needs of actual manufacturing and use. Such an auxiliary power supply circuit structure can not only help improve the output power and efficiency, but also make the output current and voltage very stable, and can ensure that the heating temperature is low. The auxiliary power supply circuit structure can achieve the purpose of auxiliary power supply extremely stably.

Claims

1. An auxiliary power supply circuit structure of an audio power module, characterized by: It comprises a dual-tube flyback circuit (1) and a voltage conversion circuit module (2), wherein the input end of the voltage conversion circuit module (2) is electrically connected to the output end of the dual-tube flyback circuit (1); and the input end of the dual-tube flyback circuit (1) is connected to an anti-surge and anti-short-circuit circuit (3).

2. The auxiliary power supply circuit structure of the audio power module according to claim 1, characterized in that: The output end of the surge and short-circuit protection circuit (3) is connected to a high-voltage balancing circuit (4).

3. The auxiliary power supply circuit structure of the audio power module according to claim 1, characterized in that: It also includes a PWM control circuit (5) and a drive control circuit (6), wherein the drive control circuit (6) is connected in series between the PWM control circuit (5) and the dual-tube flyback circuit (1).

4. The auxiliary power supply circuit structure of the audio power module according to claim 3, characterized in that: The drive control circuit (6) drives the dual-tube flyback circuit (1) via a drive transformer.

5. The auxiliary power supply circuit structure of the audio power module according to claim 3, characterized in that: The PWM control circuit (5) is connected to a sampling feedback control circuit (7).

6. The auxiliary power supply circuit structure of the audio power module according to claim 1, characterized in that: The output end of the voltage conversion circuit module (2) is connected to one, two, three or four of an operational amplifier power supply circuit (8), a DSP drive power supply circuit (9), a PWM drive power supply circuit (10) and a fan power supply circuit (20).

7. The auxiliary power supply circuit structure of the audio power module according to claim 6, characterized in that: The operational amplifier power supply circuit (8), the DSP drive power supply circuit (9), the PWM drive power supply circuit (10), and the fan power supply circuit (20) are all rectifier and filter circuits.

8. The auxiliary power supply circuit structure of the audio power module according to claim 1, 6 or 7, characterized in that: The voltage conversion circuit module (2) is connected to a series voltage stabilization circuit (30).

9. The auxiliary power supply circuit structure of the audio power module according to claim 1, characterized in that: An auxiliary power supply startup circuit (40) and an overvoltage protection circuit (50) are sequentially connected in series to the input end of the dual-tube flyback circuit (1).

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