TDA7388/7850 41w*4 four-channel amplifier module car amplifier

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TDA7388 and TDA7850 universal PCB
TDA7388 output parameters are 41w *4 Recommended speaker impedance is 4Ω (3-6 ohm speakers can also be used)
Input power supply voltage is 8-18v DC Support REM startup
has been verified successfully, the test video is in the project attachment
Because the board was drawn first and the schematic diagram was drawn later, there are many wrong places in the schematic diagram, just have a look
The official bom table is based on the schematic diagram, so the bom table is subject to the attachment!
The bom table is subject to the attachment!
The bom table is subject to the attachment!
The bom table is subject to the attachment!
 
The following is a physical picture:
 
Function and definition:
The DIP switch on the right side of the power amplifier board is used to switch between 2-channel and 4-channel. When it is turned up, it is 2-channel, that is, two AUX inputs and one.
The 2*3 female row on the right side of the power amplifier board is other input interface, which can be connected to coaxial input. The definition is as follows:
L1
GND
R1
L2
GND The MUTE interface on the lower right corner of the
R2
amplifier board is used for mute. Short-circuiting the two pin headers will mute it.
The 1*3p pin header on the left side of the amplifier board is the power-on mode selection. The pin header on the left is REM mode.
If the REM mode is not used, insert the jumper cap on the right side to start normally, otherwise it will not sound.
 
REM mode: To put it simply, it is car startup. The REM pin header on the right side of the board is connected to the 12v positive pole when the key door is opened in the car.
The two pin headers are in a line. Connecting one can achieve the purpose of sounding when the ignition is turned on and stopping when the engine is turned off. Of course, you can also use it at your own discretion
 
. About the material issue:
the material name parameters are basically written directly on the pcb, which is convenient for welding.
The resistor used is 1/4w direct-insert color ring resistor.
The selection of the main filter capacitor (C5) is relatively arbitrary, not less than 25v 1000uf, and the pin spacing is 7.5mm. If the pitch is not suitable, you can just bend it.
The height of the main filter capacitor is optional, and the diameter should not exceed 16mm .
Audio capacitors (C1, C2, C3, C4) can choose safety capacitors with a pitch of 5 or 5.08mm, and the parameters are 63v 100nf. Film capacitors are also OK.
Monolithic capacitors are selected. I don't know if my capacitor is broken or what, but the sound and noise are a bit loud.
Other small electrolytic capacitors, as long as the capacity is right, can withstand a voltage of 25v or above. This is
the first time to do open source, please point out if there is anything wrong