TDA7850 amplifier board car latest version with BA3121 common ground noise, with ACC function control (sound enhanced version)

ST's TDA7850 is a high-quality Hi-Fi car audio amplifier IC, using a single power supply 12V - 14.4V supply, MOSFET amplifier output, 4 x 50W HiFi amplifier, low distortion, low noise, anti-interference ability, with output short circuit and temperature protection in particular aspects of performance particularly prominent power, low power consumption, stable, sound quality is excellent. For car audio upgrade and DIY 4-channel amplifier the best choice.

HIFI concept design can be used for multi-channel production, with super good noise performance chip BA3121, effectively eliminating the common ground noise, TDA7850 and BA3121 can be a perfect match.

ACC function control Introduction:

Amplifier board ACC interface with vehicle ACC control line connecting  (on-board computer better wiring), ACC signal control amplifier working and standby. Standby current is about 12 mA, basically not much power. The amplifier board there is a delay function, there is no impact sound, without adding speaker protection class.

The board features:

1: The 25v8200UF large pond filter capacitor, more deep bass. To play the superior sound quality of the amplifier using a range of audio fever capacitance capacitors ELNA blue robe BP Promise fever, red WIMA Weimaraner fever audio capacitors, nichicon golden audio capacitors.

2: All new original authentic materials, non-polished material used disassemble, to optimize the adjustment on the original official line, no impact sound switch.

3: LC filter, power more pure, ripple smaller, less interference serpentine traces, sound more mellow, high-current traces strengthen tin for the high current state stable solid foundation.

4: With BA3121 noise isolation. If as a home (when there is no common ground) can jump to the bottom right corner of the cap shorted.

5: the lower left corner for the ACC selection Jumper: Plug-hop cap, non-ACC mode, turn on 12v power to work; unplug the jumper cap, after the ACC mode, turned on 12v power supply, but also to STBY (ie ACC ) a high level 5V-12v power amplifier to work.

6: 4 inputs and 4 outputs

7: DC 12V power supply or 12V car power.

8: board size of about: 65mm × 50mm × 35mm length × width × height

9: The board is equipped with radiators, radiator must be installed before you can use. Amplifier board to find a suitable location for the good, but be sure to pay attention to the radiator and fixed PCB board, amplifier board and heat sink in order to avoid shaking.

The board STBY (ACC Control) function defaults to active high, high level work, not low-level work. (High level of 3V - 12V) 

The access computers, MP3 input can be directly connected to the positive voltage of 12V 12V voltage to ST-BY interfaces on it. As converted CD riders, regular CD will have a high-level control voltage, the high voltage is connected to ST-BY on it can also be connected to a voltage ACC ST-BY is also available.

Each nest on the edge of the nest will have a screen indicating the function and the positive and negative points, please see rewiring.

Recommendations When connected CD audio amplification to take power on the CD player, then the computer's audio amplifier to pick 12V power on the computer, such as MP3 find a 12V power connector connected like it.

Note: This board is reserved for the installation position of the LED power indicator, users can install their own LDE power indicator.

Related parameters are as follows:

High output power capability:

4 x 50W / 4Ω max. (Maximum power / 4 ohm speaker load)

4 x 30W / 4Ω 14.4V, 1KHz, (10% distortion power measured at / 14V voltage, 1KHz signal / 4 ohm speaker load)

4 x 80W / 2Ω max. (Maximum power / 2 ohm speaker load)

4 x 55W / 2Ω 14.4V, 1KHz, (10% distortion power measured at / 14V voltage, 1KHz signal / 2 ohm speaker load)

Package Included: 

1x TDA7850 Amplifier board 

1x Heat sink

2x audio cables

1x other parts (as my main photo shows)

TDA7850 Amplifier (Red)