sigle chip 25w amplifier

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20Watt/Channel Stereo Power Amplifier
This project present the 20watt /channel Stereo Power Amplifier
used the LM1875 and You can also use the TDA3050 (from SGS-Thompson), which has almost identical performance and (remarkably) the same pinouts! As it turns out, the amp in the NS application circuit is pretty good, as is the (very similar) one from SGS. The amp is also remarkably simple to build - if you have a PCB! These ICs are a cow to wire on Veroboard - it is possible, but results are unpredictable.
The power supply can be use +25v,-25 good idea to use for car audio power amp , coin-op machine game, security system etc.

Figure1. LM1875 Pin Diagram

Pin No.	Name of pin	Decscription
1	+In	+Input signal
2	-In	-Input signal
3	-Vee	-Vcc Supply nagative
4	Out put	Output Signal
5	+Vcc	+Vcc Supply positive

Schmatics of circuit diagram/channel

Schmatics of powersupply daigram

LM1875 data sheet