CN210609659U

CN210609659U - Lossless music playing automobile power amplifier

Info

Publication number: CN210609659U
Application number: CN202020019751.9U
Authority: CN
Inventors: 李敏
Original assignee: Dongguan Tianyi Electronics Co ltd
Current assignee: Dongguan Tianyi Electronics Co ltd
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2020-05-22
Anticipated expiration: 2030-01-06

Abstract

The utility model discloses a harmless music broadcast car power amplifier, including power amplifier, audio frequency decoding broadcast control panel, former car sound source, power and playback device, the power amplifier includes inverter power supply boost circuit, power amplification circuit and sound source switching circuit, and inverter power supply boost circuit is connected with the power, and audio frequency decoding broadcast control panel and former car sound source are connected respectively to the input of sound source switching circuit, and the input of power amplification circuit is connected to the output of sound source switching circuit, and the playback device is connected to the output of power amplification circuit, the utility model discloses strengthen the product (bluetooth is connected cell-phone music broadcast/SD card harmless music broadcast) practical function; the original car radio is not required to be dismantled to replace the expensive CD player or navigation, so that the modification cost is saved for consumers; in addition, the practical range of the automobile power amplifier is increased, and the automobile power amplifier can be used for motorcycle types/dune buggy types and other vehicle types without sound source and sound.

Description

Lossless music playing automobile power amplifier

Technical Field

The utility model relates to a power amplifier technical field specifically is a harmless music broadcast car power amplifier.

Background

Most of low joining in marriage the motorcycle type on the world at present do not have CD/bluetooth SD card music instant music, can only listen the radio, install traditional car power amplifier additional and generally do not possess bluetooth and SD card music signal decoding and instant music, it is to remove the special CD machine of special car or the navigation of changing into with former car radio and change and come as the sound source, so repack one set of stereo set and not only spend more man-hour in the aspect of repacking construction, also make car owner or consumer pay higher stereo set expense, make car stereo set change to be equipped with certain limitation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a harmless music broadcast car power amplifier to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a lossless music playing car power amplifier comprises a power amplifier, an audio decoding playing control panel, an original car sound source, a power supply and a playing device, wherein the power amplifier comprises an inverter power supply booster circuit, a power amplification circuit and a sound source switching circuit, the inverter power supply booster circuit is connected with the power supply, the input end of the sound source switching circuit is respectively connected with the audio decoding playing control panel and the original car sound source, the output end of the sound source switching circuit is connected with the input end of the power amplification circuit, and the output end of the power amplification circuit is connected with the playing device.

As a further aspect of the present invention: the audio decoding and playing control panel is a Bluetooth/SD card audio decoding and playing module.

As a further aspect of the present invention: the power supply is a +12V power supply.

As a further aspect of the present invention: the inverter POWER supply boost circuit comprises a triode Q1, a resistor R1, a PWM integrated chip U1, an MOS transistor Q1 and an MOS transistor Q1, an emitter of the triode Q1 is connected with the resistor R1, a fuse F1, a capacitor C1 and ports 2 and 3 of a transformer T1, the other end of the fuse F1 is connected with the port 3 of a POWER input interface POWER, the other end of the resistor R1 is connected with a base of the triode Q1 and the resistor R1, the other end of the resistor R1 is connected with a collector of the triode Q1, a base of the triode Q1 is connected with the resistor R1 and the resistor R1, the other end of the resistor R1 is connected with a cathode of the diode D1 and the capacitor C1, an anode of the diode D1 is connected with a pin 2 of the POWER input interface POWER, a collector of the transistor Q1 is connected with the resistor R1, the other end of the resistor R1 is connected with the resistor R1, the capacitor C1, the other end of the capacitor C1 is connected with the PWM integrated chip U1 and the capacitor C1. The other end of the capacitor C8 is connected with a pin 2 of the PWM integrated chip U5 and a pin 3 of the PWM integrated chip U5, a pin 7 of the PWM integrated chip U5 is connected with the grid of the MOS tube Q2 through a resistor R6, a pin 6 of the PWM integrated chip U5 is connected with the grid of the MOS tube Q1 through a resistor R12, the drain of the MOS tube Q2 is connected with a port 5 of the transformer T1, the drain of the MOS tube Q1 is connected with a port 6 of the transformer T1, a port 1 of the transformer T1 is connected with the anode of the diode D2, and the cathode of the diode D2 is connected with a voltage output end, the capacitor C4 and the capacitor C5.

As a further aspect of the present invention: the power amplification circuit comprises an analog switch integrated chip U3, a power amplification chip U2 and a triode Q8. The base of the transistor Q8 is connected to the cathode of the diode D10 through a resistor R67, the anode of the diode D10 is connected to the port 4 of the control panel REM 10, the collector of the transistor Q10 is connected to the resistor R10 and the base of the transistor Q10, the collector of the transistor Q10 is connected to the resistor R10 and the power amplification chip U10, the pin 12 of the power amplification chip U10 is connected to the capacitor C10 through the resistor R10, the other end of the capacitor C10 is connected to the resistor R10 and the pin 1 of the operational amplification integrated chip U10-a, the pin 2 of the operational amplification integrated chip U10-a is connected to the resistor R10 and the resistor R10, the other end of the resistor R10 is connected to the resistor R10 and the port 4 of the original car audio source interface HIIN through the capacitor C10, the pin 1 of the power amplification chip U10 is connected to the capacitor C10 through the resistor R10, the other end of the resistor C10 is connected to the resistor R10 and the operational amplification chip U10B 10 and the operational amplification chip U10 and the pin 36, the other end of the resistor R46 is connected with a resistor R21 and a port 2 of an original car sound source interface HIIN through a capacitor C48, a pin 13 of a power amplification chip U3 is connected with a resistor R16 through a capacitor C17, the other end of the resistor R16 is connected with a pin 4 of a power amplification chip U2, a pin 3 of the power amplification chip U3 is connected with the resistor R27 through a capacitor C31, the other end of the resistor R27 is connected with a pin 10 of the power amplification chip U2, and the power amplification chip U2 is further connected with a loudspeaker.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses decoding bluetooth SD card audio frequency and broadcast function and power amplifier independently come out design banding control (broadcast/pause/last song/next song/volume control bluetooth and SD card mode switch) operating panel, the wire rod is connected to the special interface of power amplifier, operating panel installs the position that the driver position was conveniently controlled can. Compared with the original car audio, the novel power amplifier not only improves the power by 42 percent and above, but also solves the problem that most of low-distribution car models do not have the CD/Bluetooth/SD card music playing function. The sound source of the Bluetooth/SD/original car radio or navigation three is switched freely through the operation panel after the novel power amplifier is installed, and the use of the original car radio or navigation is not influenced. Compared with the traditional automobile power amplifier, the practical function of the product (Bluetooth connection mobile phone music playing/SD card lossless music playing) is enhanced; the original car radio is not required to be dismantled to replace the expensive CD player or navigation, so that the modification cost is saved for consumers; in addition, the practical range of the automobile power amplifier is increased, and the automobile power amplifier can be used for motorcycle types/dune buggy types and other vehicle types without sound source and sound.

Drawings

Fig. 1 is an overall schematic diagram of the present invention.

Fig. 2 is a schematic diagram of a booster circuit of the power amplifier inverter.

Fig. 3 is a schematic diagram of a power amplifier audio source switching and power amplifying circuit.

In the figure: 1-power amplifier, 2-inverter power supply booster circuit, 3-power amplifier circuit, 4-sound source switching circuit, 5-power supply, 6-playback equipment, 7-audio decoding playing control panel and 8-original car sound source.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: please refer to fig. 1-3, in an embodiment of the present invention, an automobile power amplifier for playing music without damage, includes a power amplifier 1, an audio decoding playing control panel 7, an original car audio source 8, a power supply 5 and a playback device 6, wherein the power amplifier 1 includes an inverter power boost circuit 2, a power amplifier circuit 3 and a power switching circuit 4, the inverter power boost circuit 2 is connected to the power supply 5, the input end of the audio switching circuit 4 is respectively connected to the audio decoding playing control panel 7 and the original car audio source 8, the output end of the audio switching circuit 4 is connected to the input end of the power amplifier circuit 3, and the output end of the power amplifier circuit 3 is connected to the playback device 6. The audio decoding and playing control panel 7 is a Bluetooth/SD card audio decoding and playing module. The power supply 5 is a +12V power supply.

The Bluetooth/SD card audio decoding playing module control panel 7 transmits audio signals to the audio source switching circuit 4 in the automobile power amplifier 1 through a connecting wire to switch the sound source of the original automobile sound source 8 and the Bluetooth/SD card audio decoding playing control panel 7, and finally transmits the audio signals to the power amplifying circuit 3 to be amplified and then output to the loudspeaker or the sound box 6.

The working principle block diagram of the automobile power amplifier comprises a power amplifier 1, a +12V power supply 5, a loudspeaker or a sound box 6, a Bluetooth/SD card audio decoding and playing control panel 7 and an original automobile sound source 8. The power amplifier 1 comprises an inverter power supply booster circuit 2, a power amplifying circuit 3 and a sound source switching circuit 4.

The power amplifier is powered on and is started up to play the SD card preferentially, and if the SD card is not detected to automatically switch the Bluetooth playing, the Bluetooth/SD/original car sound source can be switched through the control panel. Bluetooth and SD card audio signal pass through connecting wire rod and convey two routes sound source switching circuit 4 in power amplifier 1, be the bluetooth/SD sound source on the one hand, another way is the external input sound source, select control by bluetooth/SD card audio decoding play module 7, then convey to power amplifier circuit 3 and carry out power amplification after output external speaker or 6 reduction sound.

The embodiment 2 differs from the embodiment 1 in that, referring to fig. 2-3, an inverter POWER supply boost circuit (2) includes a transistor Q1, a resistor R1, a PWM integrated chip U5, a MOS transistor Q2 and a MOS transistor Q1, an emitter of a transistor Q1 is connected to a resistor R1, a fuse F1, a capacitor C1 and a port 2, 3 of a transformer T1, the other end of the fuse F1 is connected to a port 3 of a POWER input interface POWER, the other end of a resistor R1 is connected to a base of a transistor Q1 and a resistor R5, the other end of the resistor R5 is connected to a collector of the transistor Q5, the base of the transistor Q5 is connected to the resistor R5 and a resistor R5, the other end of the resistor R5 is connected to a cathode of a diode D5 and a capacitor C5, the anode of the POWER input interface POWER supply voltage of a POWER supply POWER to a POWER supply POWER.

The power amplifying circuit 3 comprises an analog switch integrated chip U3, a power amplifying chip U2 and a triode Q8. The base of the transistor Q8 is connected to the cathode of the diode D10 through a resistor R67, the anode of the diode D10 is connected to the port 4 of the control panel REM 10, the collector of the transistor Q10 is connected to the resistor R10 and the base of the transistor Q10, the collector of the transistor Q10 is connected to the resistor R10 and the power amplification chip U10, the pin 12 of the power amplification chip U10 is connected to the capacitor C10 through the resistor R10, the other end of the capacitor C10 is connected to the resistor R10 and the pin 1 of the operational amplification integrated chip U10-a, the pin 2 of the operational amplification integrated chip U10-a is connected to the resistor R10 and the resistor R10, the other end of the resistor R10 is connected to the resistor R10 and the port 4 of the original car audio source interface HIIN through the capacitor C10, the pin 1 of the power amplification chip U10 is connected to the capacitor C10 through the resistor R10, the other end of the resistor C10 is connected to the resistor R10 and the operational amplification chip U10B 10 and the operational amplification chip U10 and the pin 36, the other end of the resistor R46 is connected with a resistor R21 and a port 2 of an original car sound source interface HIIN through a capacitor C48, a pin 13 of a power amplification chip U3 is connected with a resistor R16 through a capacitor C17, the other end of the resistor R16 is connected with a pin 4 of a power amplification chip U2, a pin 3 of the power amplification chip U3 is connected with the resistor R27 through a capacitor C31, the other end of the resistor R27 is connected with a pin 10 of the power amplification chip U2, and the power amplification chip U2 is further connected with a loudspeaker.

The control panel of the Bluetooth/SD card audio decoding playing module 7 is connected with an REM1 interface in the power amplifying circuit through a 6-core wire, the 6 th pin of the interface REM1 provides power for the Bluetooth/SD card audio decoding playing module 7, and the left/right sound channel signals of the Bluetooth/SD card are input to the 11 th pin and the 4 th pin of the analog switch integrated IC through the 3 rd pin and the 4 th pin of the interface REM 1; the original car sound left/right channel signal passes through an interface HI _ IN, firstly is divided by capacitors C34, C28, C48 and C49 through direct coupling and resistors R29, R32, R24, R31, R46, R48, R47 and R49 and then is subjected to differential amplification at positive and negative phase input ends of an operational amplification integrated chip U4, then is subjected to direct coupling by capacitors C53 and C52 through direct coupling and current limiting by resistors R51 and R50 and then is input to pins 12 and 1 of an analog switch integrated chip U3, finally the signal is output by pins 13 and 3 of the analog switch integrated chip U3, and is subjected to current limiting input to

pins

4, 5, 11 and 10 of a power amplification chip U2 through capacitors C17, C19, C31 and C35 through direct coupling and resistors R16, R17, R28 and R27 and then is output from a speaker 29, a working pin to a working speaker 2 after the weak signal is successfully amplified. The switching between the Bluetooth/SD card signal and the original car sound signal is completed by controlling the high/low level of the pins 9 and 10 of the analog switch integrated chip U3, and the high/low level is output by the sound source selection operation of the Bluetooth/SD card audio decoding playing module 7 through the interface REM1 pin 4, the diode D10, the resistors R67, R66, R65, R44, the triodes Q8 and Q7 for level conversion to control the high/low level of the pins 9 and 10 of the analog switch integrated chip U3. 1. When the pins 9 and 10 of the analog switch integrated chip U3 are at high level, the pins 11 and 4 of the analog switch integrated chip U3 are respectively conducted with the pins 13 and 3, and the Bluetooth/SD card signal is sent to the power amplification chip U2 through the analog switch integrated chip U3 for power amplification; 2. when the pins 9 and 10 of the analog switch integrated chip U3 are at low level, the pins 11 and 4 of the analog switch integrated chip U3 are disconnected with the pins 13 and 3 respectively, the pins 12 and 1 are connected with the pins 13 and 3 respectively, and the original car sound signal is sent to the power amplification chip U2 through the analog switch integrated chip U3 for power amplification.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a lossless music playing car power amplifier, includes power amplifier (1), audio frequency decoding broadcast control panel (7), former car sound source (8), power (5) and playback devices (6), characterized by, power amplifier (1) includes invertion power supply boost circuit (2), power amplifier circuit (3) and sound source switch circuit (4), invertion power supply boost circuit (2) are connected with power (5), the input of sound source switch circuit (4) is connected audio frequency decoding broadcast control panel (7) and former car sound source (8) respectively, the input of power amplifier circuit (3) is connected to the output of sound source switch circuit (4), the output of power amplifier circuit (3) is connected playback devices (6).

2. The lossless music playing car power amplifier according to claim 1, wherein the audio decoding playing control panel (7) is a bluetooth/SD card audio decoding playing module.

3. The lossless music-playing car power amplifier according to claim 1, wherein the power supply (5) is a +12V power supply.

4. The POWER amplifier of claim 3, wherein the inverter boost circuit (2) comprises a transistor Q1, a resistor R1, a PWM IC U5, a MOS transistor Q2 and a MOS transistor Q1, the emitter of the transistor Q1 is connected with a resistor R1, a fuse F1, a capacitor C1 and the ports 2 and 3 of the transformer T1, the other end of the fuse F1 is connected with the port 3 of the POWER input interface POWER, the other end of the resistor R1 is connected with the base of the transistor Q1 and the resistor R1, the other end of the resistor R1 is connected with the collector of the transistor Q1, the base of the transistor Q1 is connected with the resistor R1 and the resistor R1, the other end of the resistor R1 is connected with the cathode of the diode D1 and the capacitor C1, the anode of the diode D1 is connected with the pin 2 of the POWER input interface POWER, the collector of the transistor Q1 is connected with the resistor R1, the other end of the resistor R1 and the capacitor C1 and the capacitor U1, the other end of the resistor R7 is connected with a capacitor C8 and a pin 4 of the PWM integrated chip U5, the other end of the capacitor C8 is connected with a pin 2 of the PWM integrated chip U5 and a pin 3 of the PWM integrated chip U5, a pin 7 of the PWM integrated chip U5 is connected with the grid of the MOS tube Q2 through a resistor R6, a pin 6 of the PWM integrated chip U5 is connected with the grid of the MOS tube Q1 through a resistor R12, the drain of the MOS tube Q2 is connected with a port 5 of the transformer T1, the drain of the MOS tube Q1 is connected with a port 6 of the transformer T1, a port 1 of the transformer T1 is connected with the anode of the diode D2, and the cathode of the diode D2 is connected with a voltage output end, the capacitor C4.

5. The power amplifier of claim 2, wherein the power amplifier circuit (3) comprises an analog switch IC U3, a power amplifier IC U2 and a transistor Q8, the base of the transistor Q8 is connected to the cathode of the diode D10 through a resistor R67, the anode of the diode D10 is connected to the port 4 of the control panel REM1, the collector of the transistor Q8 is connected to a resistor R65 and the base of the transistor Q7, the collector of the transistor Q7 is connected to a resistor R44 and a power amplifier IC U3, the pin 12 of the power amplifier IC U3 is connected to a capacitor C53 through a resistor R51, the other end of the capacitor C53 is connected to a resistor R32 and a pin 1 of the operational amplifier IC U4-A, the pin 2 of the operational amplifier IC U4-A is connected to a resistor R29 and a resistor R32, the other end of the resistor R29 is connected to a resistor HIR 18 and a port of the original sound source interface IN 4 through a capacitor C34, a pin 1 of a power amplification chip U3 is connected with a capacitor C52 through a resistor R50, the other end of the capacitor C52 is connected with a resistor R49 and a pin 7 of an operational amplification integrated chip U4-B, a pin 5 of the operational amplification integrated chip U4-B is connected with a resistor R46 and a resistor R48, the other end of the resistor R46 is connected with a resistor R21 and a port 2 of an original car sound source interface HIIN through a capacitor C48, a pin 13 of the power amplification chip U3 is connected with a resistor R16 through a capacitor C17, the other end of the resistor R16 is connected with a pin 4 of the power amplification chip U2, a pin 3 of the power amplification chip U3 is connected with a resistor R27 through a capacitor C31, the other end of the resistor R27 is connected with a pin 10 of the power amplification chip U2, and the power amplification chip U.