CN217216087U

CN217216087U - Stereo set power supply automatic switch-over circuit and stereo set

Info

Publication number: CN217216087U
Application number: CN202220303045.6U
Authority: CN
Inventors: 石贤德; 周明亮; 刘明军; 李统成; 赖宝进; 肖铿
Original assignee: Anhui Kelike Technology Co ltd; Anyuan County Meijing Electronics Co ltd; Huizhou City Click Electronics Co ltd; Huizhou Click Technology Co ltd; Xinfeng Click Technology Co ltd; Shenzhen Click Technology Ltd
Current assignee: Anhui Kelike Technology Co ltd; Anyuan County Meijing Electronics Co ltd; Huizhou City Click Electronics Co ltd; Huizhou Click Technology Co ltd; Xinfeng Click Technology Co ltd; Shenzhen Click Technology Ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-08-16
Anticipated expiration: 2032-02-15

Abstract

The utility model discloses a stereo set power supply automatic switch-over circuit, including the battery end, the municipal electricity end, power amplifier output positive pole, power amplifier output negative pole, first zener diode (ZD601), triode (Q605), N channel MOS pipe (Q604), P channel MOS pipe (Q603), first partial pressure module, second partial pressure module and third partial pressure module, wherein zener diode's voltage is less than the output voltage of municipal electricity end to make the output voltage of municipal electricity end behind zener diode, can switch on the triode after first partial pressure module partial pressure again. The utility model also discloses a stereo set, including foretell stereo set power supply automatic switch-over circuit. The utility model provides a stereo set power supply automatic switch-over circuit and stereo set, when the commercial power supply, the battery only charges, does not supply power for the stereo set, avoids the influence to the life of battery.

Description

Stereo set power supply automatic switch-over circuit and stereo set

Technical Field

The utility model relates to the technical field of circuits, especially, relate to a stereo set power supply automatic switch-over circuit and a stereo set.

Background

Along with the continuous improvement of the society, the quality of life of people is continuously improved, the requirements on household electronic equipment are also continuously increased, and especially in outdoor activities such as square dance and the like which are started in recent years, the use of the mobile power amplifier sound box is increased. After the existing sound equipment is plugged into alternating current commercial power, although one group of power supplies charges a battery, one group of power supplies power for a power amplifier; however, the battery needs to supply power to the sound equipment under the condition of no commercial power, so that the charger and the battery in the existing sound equipment power supply circuit supply power at the same time, the battery is slowly charged, the service life of the battery is influenced, and the daily life requirements of people cannot be met.

The above background disclosure is only provided to aid in understanding the concepts and technical solutions of the present invention, and it does not necessarily belong to the prior art of the present patent application, and it should not be used to assess the novelty and inventive step of the present application without explicit evidence that the above content has been disclosed at the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a stereo set power supply automatic switch-over circuit and a stereo set, when the commercial power supply, the battery only charges, does not supply power for the stereo set, avoids the influence to the life of battery.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a stereo set power supply automatic switch-over circuit, including battery end, municipal electricity end, power amplifier output positive pole, power amplifier output negative pole, first zener diode (ZD601), triode (Q605), N channel MOS pipe (Q604), P channel MOS pipe (Q603), first partial pressure module, second partial pressure module and third partial pressure module, the battery end with municipal electricity end is used for right respectively power amplifier output positive pole power supply, power amplifier output negative pole ground connection, the negative pole of first zener diode (ZD601) is connected the municipal electricity end, the anodal of first Zener Diode (ZD) is connected the first end of first partial pressure module, the middle-end of first partial pressure module is connected the base of triode (Q605), the second end of first partial pressure module the projecting pole of triode (Q605), the second end of second partial pressure module, The source electrode of the N-channel MOS tube (Q604) is respectively connected with the negative electrode of the power amplifier output, the collector electrode of the triode (Q605) is connected with the middle end of the second voltage division module and the grid electrode of the N-channel MOS tube (Q604), the drain electrode of the N-channel MOS tube (Q604) is connected with the second end of the third voltage division module, the first end of the second voltage division module, the first end of the third voltage division module and the source electrode of the P-channel MOS tube (Q603) are respectively connected with the battery end, the drain electrode of the P-channel MOS tube (Q603) is connected with the positive electrode of the power amplifier output, the grid electrode of the P-channel MOS tube (Q603) is connected with the middle end of the third voltage division module, wherein the voltage of the first voltage stabilizing diode (ZD601) is smaller than the output voltage of the mains end, so that the output voltage of the mains end passes through the first voltage stabilizing diode (ZD601), and the triode (Q605) can be conducted after voltage division by the first voltage division module.

Preferably, the first voltage division module comprises a first resistor (R601) and a second resistor (R600) which are connected in series with each other, wherein a first end of the first resistor (R601) is connected with an anode of the first zener diode (ZD601), a second end of the first resistor (R601) and a first end of the second resistor (R600) are respectively connected with a base of the triode (Q605), and a second end of the second resistor (R600) is connected with a cathode of the power amplifier output.

Preferably, the second voltage division module comprises a third resistor (R603) and a fourth resistor (R604) connected in series with each other, wherein a first end of the third resistor (R603) is connected to the battery terminal, a second end of the third resistor (R603) and a first end of the fourth resistor (R604) are respectively connected to a collector of the triode (Q605), and a second end of the fourth resistor (R604) is connected to a negative electrode of the power amplifier output.

Preferably, the third voltage division module comprises a fifth resistor (R605) and a ninth resistor (R609) which are connected in series with each other, wherein a first end of the fifth resistor (R605) is connected with the battery terminal, a second end of the fifth resistor (R605) and a first end of the ninth resistor (R609) are respectively connected with the gate of the P-channel MOS transistor (Q603), and a second end of the ninth resistor (R609) is connected with the drain of the N-channel MOS transistor (Q604).

Preferably, the sound power supply automatic switching circuit further comprises a first filtering module, the first filtering module comprises a first capacitor (C611), a first end of the first capacitor (C611) is connected with the gate of the N-channel MOS transistor (Q604), and a second end of the first capacitor is connected with the negative electrode of the power amplifier output.

Preferably, the sound power supply automatic switching circuit further comprises a second filtering module, the second filtering module comprises a second capacitor (C612), a first end of the second capacitor (C612) is connected to the battery end, and a second end of the second capacitor (C612) is connected to the gate of the P-channel MOS transistor (Q603).

Preferably, the sound power supply automatic switching circuit further comprises a second zener diode (ZD602), wherein an anode of the second zener diode (ZD602) is connected to a gate of the P-channel MOS transistor (Q603), and a cathode of the second zener diode is connected to the battery terminal.

The utility model also discloses a stereo set, including foretell stereo set power supply automatic switch-over circuit.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a stereo set power supply automatic switch-over circuit wherein connects through combining devices such as using first zener diode (ZD601), triode (Q605), N channel MOS pipe (Q604), P channel MOS pipe (Q603), can so that when mains supply, the battery only charges, does not give the stereo set power supply, avoids the influence to the life of battery.

In a further scheme, the second voltage stabilizing diode (ZD602) can protect the gate of the P-channel MOS transistor (Q603) from exceeding the gate-source voltage of the MOS transistor due to the voltage when the battery is fully charged, so that the P-channel MOS transistor (Q603) is damaged, and the function of protecting the MOS transistor (Q603) from being damaged is achieved.

Drawings

FIG. 1 is a schematic diagram of a prior art audio power supply circuit;

fig. 2 is a schematic structural diagram of an automatic switching circuit for sound power supply according to a preferred embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for either a fixed or circuit/signal communication role.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

As shown in fig. 1, the structure of the power supply circuit for a sound equipment in the prior art is schematically illustrated, where the power supply circuit for a sound equipment includes a battery terminal BATT +, a mains voltage terminal LVS, a power amplifier output positive electrode, a power amplifier output negative electrode, a fuse F601, diodes D601, D602, D603, D604, an inductor L601, a capacitor C604, C605, C606, C610, a resistor R610, and a common mode inductor L602, L603, where the battery terminal BATT + is connected to the power amplifier output positive electrode through the fuse F601, the diodes D604, D603, and the common mode inductor L603, the mains voltage terminal LVS is connected to the power amplifier output positive electrode through the inductor L601, the common mode inductor L602, the diodes D602, D601, and the common mode inductor L603, the power amplifier output negative electrode is grounded, the capacitors C604, C605, and the resistor R610 are connected between the mains voltage terminal LVS and the ground, and the capacitors C606, C610 are connected between the power amplifier output positive electrode and the power amplifier output negative electrode.

When the battery terminal BATT + is inserted for charging, the battery terminal BATT + and the voltage of the mains supply terminal LVS supply power to the power amplifier at the same time, so that the battery can be charged and discharged simultaneously, and the battery can not be fully charged all the time if the power amplifier works at high power all the time; the specific circuit working principle is as follows: after the battery terminal BATT + is protected by a fuse F601, the battery terminal BATT + is isolated by diodes D604 and D603 and then supplies power to a power amplifier through a common mode inductor L603 (the L603 is designed for improving EMC); meanwhile, when the commercial power end LVS works, the commercial power end LVS is filtered by the capacitor C604, isolated by the diodes D602 and D601, and then supplied to the power amplifier through the common mode inductor L603(L603 is designed to improve EMC), wherein the diodes D604 and D603 and the diodes D601 and D602 mainly serve to isolate the reverse current before the voltage of the commercial power end LVS and the voltage of the battery terminal BATT +.

As shown in fig. 2, the sound power supply automatic switching circuit according to the preferred embodiment of the present invention is an automatic switching circuit of sound power supply according to the above-mentioned prior art, which is added with a first voltage stabilizing diode ZD601, a transistor Q605, an N-channel MOS transistor Q604, a P-channel MOS transistor Q603, a first voltage dividing module, a second voltage dividing module and a third voltage dividing module, wherein the negative electrode of the first voltage stabilizing diode ZD601 is connected to the main voltage LVS, the positive electrode of the first voltage stabilizing diode ZD601 is connected to the first end of the first voltage dividing module, the middle end of the first voltage dividing module is connected to the base of the transistor Q605, the second end of the first voltage dividing module, the emitter of the transistor Q605, the second end of the second voltage dividing module, the source of the N-channel MOS transistor Q604 is respectively connected to the negative electrode of the power amplifier, the collector of the transistor Q605 is connected to the middle end of the second voltage dividing module, the gate of the N-channel MOS transistor Q604, the drain of the N-channel transistor Q604 is connected to the second end of the third voltage dividing module, the first end of the second voltage division module, the first end of the third voltage division module and the source electrode of the P-channel MOS tube Q603 are respectively connected with a battery terminal BATT +, the drain electrode of the P-channel MOS tube Q603 is connected with the positive electrode of the power amplifier output, and the grid electrode of the P-channel MOS tube Q603 is connected with the middle end of the third voltage division module.

The first voltage division module comprises a first resistor R601 and a second resistor R600 which are connected in series, the first end of the first resistor R601 is connected with the anode of a first voltage stabilizing diode ZD601, the second end of the first resistor R601 and the first end of the second resistor R600 are respectively connected with the base electrode of a triode Q605, and the second end of the second resistor R600 is connected with the cathode of the power amplifier output. The second voltage division module comprises a third resistor R603 and a fourth resistor R604 which are connected in series, the first end of the third resistor R603 is connected with a battery terminal BATT +, the second end of the third resistor R603 and the first end of the fourth resistor R604 are respectively connected with a collector of the triode Q605, and the second end of the fourth resistor R604 is connected with the negative electrode of the power amplifier output. The third voltage division module comprises a fifth resistor R605 and a ninth resistor R609 which are connected in series, wherein the first end of the fifth resistor R605 is connected with the battery terminal BATT +, the second end of the fifth resistor R605 and the first end of the ninth resistor R609 are respectively connected with the grid electrode of the P-channel MOS tube Q603, and the second end of the ninth resistor R609 is connected with the drain electrode of the N-channel MOS tube Q604.

In a further embodiment, the automatic switching circuit for sound power supply further comprises a first filtering module and a second filtering module, wherein the first filtering module comprises a first capacitor C611, a first end of the first capacitor C611 is connected with a gate of the N-channel MOS transistor Q604, and a second end of the first capacitor C611 is connected with a negative electrode of a power amplifier output; the second filter module comprises a second capacitor C612, a first end of the second capacitor C612 is connected with the battery terminal BATT +, and a second end is connected with the gate of the P-channel MOS transistor Q603. The filtering is performed when the power amplifier is powered by the mains supply terminal LVS and the battery terminal BATT + through the first capacitor C611 and the second capacitor C612 respectively.

In a further embodiment, the sound power supply automatic switching circuit further includes a second zener diode ZD602, an anode of the second zener diode ZD602 is connected to a gate of the P-channel MOS transistor Q603, and a cathode of the second zener diode ZD602 is connected to the battery terminal BATT +.

When the commercial power works, the voltage of the commercial power end LVS is about 25V, the first voltage stabilizing diode ZD601 is turned on, and the voltage of the base VGS of the triode Q605 is 0.6V after the voltage of the commercial power end LVS is divided by the first resistor R601 and the second resistor R600, so that the triode Q605 is turned on. When the triode Q605 is turned on, the gate of the N-channel MOS transistor Q604 turns off the MOS transistor Q604 due to the low potential, the drain of the MOS transistor Q604 is at a high level, the drain of the MOS transistor Q604 is connected to the gate of the MOS transistor Q603, the MOS transistor Q603 is a P-channel MOS transistor, and the gate of the MOS transistor Q603 is at a high level and therefore is not turned on, so that the voltage of the battery terminal BATT + cannot supply power to the audio.

When a user uses the stereo outdoors, the commercial power end LVS has no voltage because of no alternating current, and the triode Q605 is not conducted because the base has no voltage; after passing through diodes D604 and D603, a battery terminal BATT + is divided by a third resistor R603 and a fourth resistor R604, so that the voltage of a grid electrode of an MOS transistor Q604 is about 10V, and the MOS transistor Q604 is conducted; after the MOS tube Q604 is conducted, the drain electrode of the MOS tube Q604 is changed into low level, so that the MOS tube Q603 of the P channel is conducted, the BATT + of the battery end supplies power to the sound after passing through the fuse F601, the diodes D604 and D603 and the MOS tube Q603, and the automatic identification power supply function is achieved.

In summary, compared with the existing circuit, the sound-powered automatic switching circuit proposed in the preferred embodiment of the present invention adds a first zener diode ZD601, a second zener diode ZD602, a second resistor R600, a first resistor R601, a third resistor R603, a fourth resistor R604, a fifth resistor R605, a ninth resistor R609, a first capacitor C611, a second capacitor C612, a triode Q605, a P-channel MOS Q603, and an N-channel MOS Q604, wherein one end of the fifth resistor R605 is connected to the third resistor R603, the negative electrode of the second zener diode ZD602, one end of the second capacitor C612, and the source of the P-channel MOS Q603, the other end of the fifth resistor R605 is connected to the positive electrode of the second zener diode ZD602, one end of the second capacitor C612 is connected to the gate of the MOS Q603, the drain of the MOS Q603 is connected to the output positive electrode of the power amplifier, one end of the ninth resistor R609 is connected to one end of the fifth resistor R605, and the other end of the ninth resistor R604 is connected to the drain of the N-channel MOS Q603, the negative electrode of the first zener diode ZD601 is connected with the positive electrode of the diode D602, the positive electrode of the first zener diode ZD601 is connected with one end of a first resistor R601, the other end of the first resistor R601 and one end of a second resistor R600 are connected with the base electrode of the triode Q605, and the other end of the second resistor R600 is connected with the emitter electrode of the triode Q605, the fourth resistor R604, the first capacitor C611 and the emitter electrode of the N-channel MOS tube Q604 and the ground; the collector of the triode Q605 is connected to the other end of the third resistor R603, and is also connected to the other ends of the fourth resistor R604 and the first capacitor C611.

Therefore, the utility model discloses preferred embodiment provides a stereo set power supply automatic switch-over circuit's theory of operation does: (1) when the charger does not work and inserts the battery, then the voltage of battery end BATT + is turned on through N channel MOS pipe Q604 after third resistance R603 and fourth resistance R604 divide the voltage, and after MOS pipe Q604 switches on, the grid of P channel MOS pipe Q603 becomes low level, thereby makes P channel MOS pipe Q603 switch on, then the voltage of battery end BATT + is through fuse F601, diode D603, D604 and P channel MOS pipe Q603 thereby for the power amplifier power supply. (2) When the charger is inserted into the battery, the charger charges the battery while working, but the commercial power LVS outputs about 25V voltage at the same time, the voltage is filtered by the capacitor C604 and then is supplied to the power amplifier by the diodes D602 and D601, but at the same time, because the first voltage stabilizing diode ZD601 is a 15V voltage stabilizing diode, the voltage at the commercial power LVS is divided by the first voltage stabilizing diode ZD601 and then is provided to the base electrode conducting voltage of the triode Q605 to conduct the triode Q605 after being divided by the first resistor R601 and the second resistor R600, when the triode Q605 is conducted, the collector potential becomes low, the MOS transistor Q604 cannot be conducted, the drain of the MOS transistor Q604 is high level, because the MOS transistor Q603 is a P-channel MOS transistor, the grid electrode is low level and is conducted, the MOS transistor Q603 cannot be conducted, thereby realizing that when the charger is operated, the battery is inserted, the battery is charged without supplying power to the power amplifier audio, thereby accelerating the charging time and prolonging the service life of the battery, the final purpose is achieved. Further, the second zener diode ZD602 may protect the gate of the P-channel MOS transistor Q603 from exceeding the gate-source voltage of the MOS transistor by 20V due to the voltage of 21V when the battery is fully charged, so that the P-channel MOS transistor Q603 is damaged, and the function of protecting the MOS transistor Q603 from being damaged is performed.

The background section of the present invention may contain background information about the problems or environments of the present invention rather than describing the prior art by others. Accordingly, the inclusion in the background section is not an admission of prior art by the applicant.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific/preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. For those skilled in the art to which the invention pertains, a plurality of alternatives or modifications can be made to the described embodiments without departing from the concept of the invention, and these alternatives or modifications should be considered as belonging to the protection scope of the invention. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a stereo set power supply automatic switch-over circuit, includes battery end, commercial power end and power amplifier output positive pole, power amplifier output negative pole, battery end with commercial power end is used for respectively to power amplifier output positive pole, power amplifier output negative pole ground connection, characterized by still includes first zener diode (ZD601), triode (Q605), N channel MOS pipe (Q604), P channel MOS pipe (Q603), first voltage division module, second voltage division module and third voltage division module, wherein, the negative pole of first zener diode (ZD601) is connected the commercial power end, the positive pole of first zener diode (ZD601) is connected the first end of first voltage division module, the middle-end connection of first voltage division module the base of triode (Q605), the second end of first voltage division module, the projecting pole of triode (Q605), the second end of second voltage division module, The source electrode of the N-channel MOS tube (Q604) is respectively connected with the negative electrode of the power amplifier output, the collector electrode of the triode (Q605) is connected with the middle end of the second voltage division module and the grid electrode of the N-channel MOS tube (Q604), the drain electrode of the N-channel MOS tube (Q604) is connected with the second end of the third voltage division module, the first end of the second voltage division module, the first end of the third voltage division module and the source electrode of the P-channel MOS tube (Q603) are respectively connected with the battery end, the drain electrode of the P-channel MOS tube (Q603) is connected with the positive electrode of the power amplifier output, the grid electrode of the P-channel MOS tube (Q603) is connected with the middle end of the third voltage division module, wherein the voltage of the first voltage stabilizing diode (ZD601) is smaller than the output voltage of the mains end, so that the output voltage of the mains end passes through the first voltage stabilizing diode (ZD601), and the triode (Q605) can be conducted after voltage division by the first voltage division module.

2. The automatic switching circuit of sound power supply according to claim 1, wherein the first voltage division module comprises a first resistor (R601) and a second resistor (R600) connected in series with each other, wherein a first end of the first resistor (R601) is connected to the anode of the first zener diode (ZD601), a second end of the first resistor (R601) and a first end of the second resistor (R600) are respectively connected to the base of the triode (Q605), and a second end of the second resistor (R600) is connected to the cathode of the power amplifier output.

3. The automatic switching circuit of sound power supply according to claim 1, wherein the second voltage division module comprises a third resistor (R603) and a fourth resistor (R604) connected in series with each other, wherein a first end of the third resistor (R603) is connected to the battery terminal, a second end of the third resistor (R603) and a first end of the fourth resistor (R604) are respectively connected to a collector of the transistor (Q605), and a second end of the fourth resistor (R604) is connected to a negative electrode of the power amplifier output.

4. The automatic switching circuit of sound supply according to claim 1, wherein said third voltage dividing module comprises a fifth resistor (R605) and a ninth resistor (R609) connected in series with each other, wherein a first terminal of the fifth resistor (R605) is connected to said battery terminal, a second terminal of the fifth resistor (R605) and a first terminal of the ninth resistor (R609) are respectively connected to the gate of said P-channel MOS transistor (Q603), and a second terminal of the ninth resistor (R609) is connected to the drain of said N-channel MOS transistor (Q604).

5. The automatic switching circuit of sound power supply according to claim 1, further comprising a first filtering module, wherein the first filtering module comprises a first capacitor (C611), a first end of the first capacitor (C611) is connected to the gate of the N-channel MOS transistor (Q604), and a second end of the first capacitor is connected to the negative electrode of the power amplifier output.

6. The acoustically-powered automatic switching circuit of claim 1 further comprising a second filtering module, said second filtering module comprising a second capacitor (C612), a first terminal of said second capacitor (C612) being coupled to said battery terminal and a second terminal being coupled to the gate of said P-channel MOS transistor (Q603).

7. The acoustically-powered automatic switching circuit of any one of claims 1 to 6, further comprising a second zener diode (ZD602), wherein the anode of the second zener diode (ZD602) is connected to the gate of the P-channel MOS transistor (Q603), and the cathode of the second zener diode is connected to the battery terminal.

8. A sound comprising the sound power supply automatic switching circuit of any one of claims 1 to 7.