Home > Circuits > 14W Audio Amplifier
Modified:21:45, 22 October 2013
This circuit is straight from the datasheet and is a good quality audio amplifier that can run from a single or split supply and can produce 14W into a 4ohm load.
CIRCUIT DESCRIPTION


SINGLE SUPPLY VERSION

This is a standard circuit for this IC using a single power supply. It uses decoupling capacitors to handle the AC signals.

The IC will work from 12v to 36v although performance and quality will be affected at lower voltages. If a higher supply voltage is used be sure to upgrade all the capacitor voltages. C5 must be at least 25v and preferably 35v or more. This will result in a large capacitor but there is room for it on the PCB.

It is essential to mount the IC on a suitably sized heatsink and use thermal grease when securing to the heatsink. At least 5degC/w or less should be used.

SPLIT SUPPLY VERSION

This version uses a split supply, +/-12v instead of 24v. Again the supply can go up to +/-18v. The split supply version has similar performance to the single supply version.

The following ratings are taken from the TDA2030 datasheet.

Supply voltage = +/- 15v

9W into 8 ohms
14W into 4 ohms
THD = 0.5% @ 12W


PCB's

SINGLE SUPPLY VERSION

The PCB's for the above circuits are shown left and right.

The Single supply version is larger due to the need for the large value output decoupling capacitor. Note that it is an Axial type, not Radial.

DOWNLOADS

PCB layout for single and split supply.

SPLIT SUPPLY VERSION

Designed and Written by Phil Townshend 2008
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