Electronics Help Care electronics circuit diagram
2.1 audio amplifier circuit:
This is a 2.1 audio amplifier circuit diagram for the home theater. this diagram has 3 inputs and 3 outputs. here used 2 IC TDA7265. one IC for surround in stereo mode. Another one is for the subwoofer in bridge mode. surround ic make 25 watts+25 watts. and the subwoofer IC makes 50 watts. here can use 12-0-12 voltage to 25-0-25 voltage. need a low-pass filter for the subwoofer input. and for the surround need stereo input.
WIDE SUPPLY VOLTAGE RANGE (UP TO
±25V ABS MAX.)
SPLIT SUPPLY
HIGH OUTPUT POWER
25 + 25W @ THD =10%, RL = 8Ω, VS = +20V
NO POP AT TURN-ON/OFF
MUTE (POP FREE)
STAND-BY FEATURE (LOW Iq)
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
DESCRIPTION
The TDA7265 is a class AB dual Audio power amplifier assembled in the Multiwatt package, specially designed for high-quality sound application
as Hi-Fi music centers and stereo TV sets.
The circuit diagram
This circuit doesn’t have speaker protection. here need a speaker protection circuit. here is the link to get the speaker protection circuit. Diagram is here
This is the Speaker protection circuit diagram. It can protect our Speaker from the burn. if the amplifier has any problem then this circuit can save our soundbox. Normally when the transistor makes a short circuit the voltage comes out from the speaker output line then this circuit protects that voltage. This circuit should not allow any direct voltage to be sent to the speaker. This circuit is very important for protecting the speaker.
We have another post for you. like Stk 4101 repairing amplifier,
Build a Transformer or construct the transformer. Home Theater Circuit Diagram 5.1
Thanks a lot for being with us. If you want another post then please visit our website.
We have another post for you. like repairing amplifiers, If you like electronics please visit our other post. electronicshelpcare.com
our Facebook page is Electronicshelpcare
