Gainclone PS current?

[rafalc]

Roughly how much current does one channel of gainclone draw using LM3875?

Has any one tried using choke in the power supply current? Would I need to put the choke on both +ev and –eg rail or just positive will do?

[thomas997]

Is it anywhere in the spec sheet? Im guessing it draws 1 or 2 amps because people recommend about 80VA per channel.

I would like to know about the choke as well, havent seen anyone use them yet. Maybe because the cost and size needed to safely handle these amps?

thx

[rafalc]

That explains why people are not doing it, the choke with with few henrys for such current would be large and expensive.

[GregGC]

Originally posted by rafalc
Roughly how much current does one channel of gainclone draw using LM3875?

Has any one tried using choke in the power supply current? Would I need to put the choke on both +ev and –eg rail or just positive will do?

The current will depend on the amount of power you want to put into the speekers and their impedance too.

[jackinnj]

Originally posted by rafalc
Roughly how much current does one channel of gainclone draw using LM3875?

Has any one tried using choke in the power supply current? Would I need to put the choke on both +ev and –eg rail or just positive will do?

All will be revealed on the National Semiconductor website -- they have a Microsoft Excel spreadsheet program which gives y ou the peak current values in single, bridged and parallel mode:
http://www.national.com/appinfo/audi...gn_Guide14.xls

it seems as if i have to answer this question once a week. moderator, perhaps we need an FAQ