4 x 25 W Car Amplifier TDA7381 Schematic Circuit with explanation

4 x 25 W Car Amplifier TDA7381 Circuit

This is a 4 x25 Watt audio amplifier circuit using IC TDA7381. The amplifier circuit require few external components and is very easy to build. This amplifier is designed for car audio system, but you may use the circuit for another application such as mp3 player, computer etc

4 Rangkaian 4 x 25 W Car audio Amplifier
Using TDA7381

TDA7381 IC PinningTDA7381 IC Pinning

Note:
  • The TDA7295 IC must be fitted with adequately sized heat sinks.
  • Use 12V DC for powering the circuit.
  • Connect a 50K POT in series with the input as volume control if you need. Not shown in circuit diagram.
The TDA7381 is a class AB audio power amplifier in Flexiwatt25 package designed for car radio applications. You you can also use this circuit for other purposes. Thanks to the fully complementary PNP/NPN output configuration the TDA7381 allows a rail to rail output voltage swing with no need of bootstrap capacitors.

The extremely reduced components count allows very compact sets. The on-board clipping detector simplifies gain compression operations. The fault diagnostics makes it possible to detect mistakes during Car- Radio assembly and wiring in the car.

Absolute maximum ratings of IC TDA7295 IC
  1. Operating supply voltage = 18 V
  2. DC supply voltage = 28 V
  3. Peak supply voltage (t = 50 ms) = 50 V
  4. Output peak current Repetitive (duty cycle 10 % at f = 10 Hz) = 3 A
  5. Output peak current Non repetitive (t = 100 μs) = 4A
  6. Power dissipation, (Tcase = 70 °C) = 80 W
  7. Junction temperature = 150 °C
  8. Storage temperature = -40 to 150 °C

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