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This IC chip was designed specifically for use in power boosting applications in automobiles. It is self protecting against short circuits and thermal problems. In the bridge configuration shown it will deliver 20 watts of power into a 2 ohm speaker operating at 14.4 volts. 20 Watt Power Amplifier Circuit Diagram

Collection of V ersatile A udioAmplifier N umber 2 Schema 20kW audio amplifier Scheme 2000 Watt Audio Amplifier Scheme 200 Watt Audio Amplifier Scheme 20 Watt Audio Amplifier layout PCB Scheme 2 Watt Audio Amplifier

This time, there is a series of audio amplifer 20W as well, but using IC TDA 2005 as a series of his base amplifier. The series of 2x20 Watt Audio Power Amplifier using TDA2005 can you see in the picture below. Technical Data: Performance of TDA2005M: (for this circuit); At 4.14 V supply voltage: 2 x 20 watts (stereo) into 4 Ohms. Distortion: Approx. 0.2% at 4 Watts into 4 ohm load. Frequency Range: Approx. 20 Hz to 22 KHz. Input Sensitivity: Approx. maximum 150 mV rms. . Power supply: + 8 to 18 volts, approx. 3.5 Amps maximum per channel.

AOC  2116s - TC7CMADDLWA6NG - TC7CMADDLWA6NN Used semiconductors:  AN9945N-T1-PF – TEA1530AT – STP10NK70ZEP(FET)  SMPS and Back-light Inverter circuit diagram SCALER (LVDS) SMPS PWB-solder side Click on the pictures to magnify

General Description: The AN7190NK and the AN7190NZ are audio power ICs developed for the sound output of car audio (dual 20 W). It is incorporating various protective circuits to protect the IC from destruction by GND-open, short circuit to GND and power supply surge which are the important subject of power IC protection, so the IC will largely contribute to a high reliability design of equipment. Also, it is incorporating a perfect muting circuit which is free from shock noise, so that a shock noise design under the set transient condition can be made easily using together with its standby function.  Circuit Diagram: Dual 20 Watt audio amplifier

For this time I will post the scheme following an amplifier of the IC KA2203, SN16975, TBA820, UL1482P. Which has 4 Watt power output with 4 Ohm impedance. At least 8 Volt supply voltage and a maximum of 20 volts. Part List R1 = 100K R2 = 56R  R3 = 56R Use 1/2 W resistor C1 = 47uF C2 = 100uF C3 = 100uF C4 = 470uF C5 = 470pF C6 = 0.22uF C7 = 100uF U1 = KA2203 , SN16975, TBA820, UL1482P