Wide supply voltage range can be used for this circuit from 10VDC to 40VDC. Recommended supply voltage is 18V. You may use 0.5A – 1A transformer for the power supply circuit.

About TDA1020B:
The TDA1013B is an integrated 4W audio power amplifier with DC volume control , encapsulated in a 9-lead single in-line (SIL) plastic package. The wide supply voltage range makes this circuit ideal for applications in mains and battery-fed apparatus such as television receivers and record players.

The DC volume control stage has a logarithmic control characteristic with a range of more than 80 dB; control is by means of a DC voltage variable between 2 and 6.5 V. The audio amplifier has a well defined open loop gain and a fixed integrated closed loop. This device requires only a few external components and offers stability and performance.

TDA1013B Features:

• Few external components
• Wide supply voltage range
• Wide control range
• Pin compatible with TDA1013A
• Fixed gain
• High signal-to-noise ratio
• Thermal protection

Download the document of TDA1013B datasheet for 4W audio amplifier circuit reference:

TDA1013B Datasheet

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