TDA7375 - Voltage Regulator ? - diyAudio
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Old 16th January 2011, 06:55 PM   #1
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Default TDA7375 - Voltage Regulator ?

I'm getting the parts together for Mini, Low volume, good quality "can you go and do that somewere else please" Guitar amp.

The plan so far is to build a clean power stage first, based on a TDA7375 driving a 4Ohm 6" Jensen Speaker.

The first thing I like to do on these builds is figure out the power supply; I'd like to regulate it on board so I can use a veriety of power sources.

If I'm reading the TDA7375 data sheet right, I could be looking at a current draw of over 4A at peak. If this is right my usual 78XX regulators arn't going to like it.

High Current regulators are expensive beasts; Can anyone sugest some options for a Cheapy regulated supply that can drive this chip?
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Old 17th January 2011, 11:22 AM   #2
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There are shematics how to increase the 78XX's current in the datasheet on page 17 and 18.

One alternative is a more expensive regulator like the LT1083 or LT1084.
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Old 17th January 2011, 11:40 AM   #3
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Quote:
Originally Posted by pacificblue View Post
There are shematics how to increase the 78XX's current in the datasheet on page 17 and 18.

One alternative is a more expensive regulator like the LT1083 or LT1084.
A very simple approach would be to use a linear regulator in combination with a pass transistor which can handle large amounts of current.
Pass transistor regulators are pretty common...if you look into LM317 data sheet you'll find lot of designs. Performance wise surely an integrated regulator like LT1083 will definitely be better but a pass transistor design will not be all that bad either..considering the cost.
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