Do More

14W CLASS A AMPLIFIER USING 2N3055 ELECTRONIC DIAGRAM Why Class A ? Because , when biased to class A, the transistors are always turned on, always ready to respond instantaneously to an input signal. Class B and Class AB output stages require a microsecond or more to turn on. The Class A operation permits cleaner operation under the high-current slewing conditions that occur when transient audio signal are fed difficult loads. His amplifier is basically simple, as can be seen from the block diagram.

Overview: The AN7171NK and AN7176K are ICs for power amplification of 14W (13.2V, 4Ω) output. It can provide stereo operation since two BTL amplifiers are incorporated in achip. It incorporates various protective circuits, thus providing high reliability. The circuits can be turned on or offwith supply pins energized, because the stand-by circuit is built-in. Circuit Diagram: Dual BTL 14W Audio Power Amplifier Circuits