AMP51RTC Reference Design
by Martin Clausen (mc AT rotgradpsi DOT de)
Here an example of a construction of an amplifier with an AMP51RTC controller.
A Powerful Amplifier in a 19" Case
Table of Contents:
Further Information:
The appliance is based on the AMP51RTC design extended by two dual integrated amplifiers. The used chips TDA7293 from ST are modern IC, which do not suffer from the draw backs of integrated amplifiers of the old days. They drive 4 Ohm loads without problems. In this circuit two TDA7293 drive in parallel one channel to get a high output power. Furthermore the chips have a clipping detector, which is used by the µC to reduce the volume if necessary. To save energy the controller and the preamp are powered by a small separate transformer and the amplifier is switched off by the µC via a relais.
Click on the pictures to enlarge!
- Size: 483,6*350*133,35 mm³
- Output power with 8 Ohm load: app. 2* 90W RMS
- Output power with 4 Ohm load: app. 2* 130W RMS
- And all data of the AMP51RTC
Connect the amplifier via the ground side of the feedback network directly at the TDA7318 to ground.
Read avoiding TDA7293 pitfalls for more details.
Disclaimer: No warranty at all!
Copyright by Martin Clausen, Germany.
Contact the author: mc AT rotgradpsi DOT de
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