Regulated PS for Chip amp

jomesh · 11th January 2010, 06:57 AM

hi,

i am new to this forum; it is an amazing place!

i made a design with LM4780, now trying to make the PS. while browising through the designs discussed here, i found most of'em usem un regulated PS.
Could some one please tell me if a regulated PS is a must or not?

Also i am planning to use it with a Bose 301 series stereo speakers. Any body got a review on bose 301 with LM4780?

thanks!
Jomesh

Nuuk · 11th January 2010, 02:44 PM

Building a Gainclone chip amp with a regulated power supply (PSU).

Building a buffered Gainclone chip amp.

digi01 · 12th January 2010, 01:48 AM

i would like use regulated psu under +/-18VDC.i think regulated psu is good for low voltage high current situation.
my loudspeaker is 6ohm,i use unregulated +/-22VDC supply parallel lm4780.

z

Leolo · 13th January 2010, 08:23 PM

Regulation is generaly not necessary for gainclones. The IC used aready has very high supply noise rejection. And one of the features of gainclones is the very very low parts count.

Regarding Bose, they are generaly very crappy. The models I've heard had far far to much bass and next to no definition.

star882 · 13th January 2010, 08:27 PM

But with the cost of voltage regulation going down, why not?

mjf · 08:39 PM

[QUOTE=digi01;2044065]i would like use regulated psu under +/-18VDC.i think regulated psu is good for low voltage high current situation.
my loudspeaker is 6ohm,i use unregulated +/-22VDC supply parallel lm4780.

hello.
there is an article.
perhaps this can help you.
.......don't forget about the heatsinks.........
greetings..........

Capacitance Multiplier Power Supply Filter

danielwritesbac · 17th January 2010, 08:50 PM

Quote:

Originally Posted by jomesh

hi,

i am new to this forum; it is an amazing place!

i made a design with LM4780, now trying to make the PS. while browising through the designs discussed here, i found most of'em usem un regulated PS.
Could some one please tell me if a regulated PS is a must or not?

Also i am planning to use it with a Bose 301 series stereo speakers. Any body got a review on bose 301 with LM4780?

thanks!
Jomesh

The LM4780 on regulated power, is a good match for the Bose 301 Speakers.

However, since you're at diyaudio.com, then you might want to take a look at the diyaudio speaker forum.

11th January 2010, 06:57 AM	#1
jomesh diyAudio Member Join Date: Jan 2010	Regulated PS for Chip amp hi, i am new to this forum; it is an amazing place! i made a design with LM4780, now trying to make the PS. while browising through the designs discussed here, i found most of'em usem un regulated PS. Could some one please tell me if a regulated PS is a must or not? Also i am planning to use it with a Bose 301 series stereo speakers. Any body got a review on bose 301 with LM4780? thanks! Jomesh

11th January 2010, 02:44 PM	#2
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	Building a Gainclone chip amp with a regulated power supply (PSU). Building a buffered Gainclone chip amp. __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

12th January 2010, 01:48 AM	#3
digi01 diyAudio Member Join Date: Mar 2003 Location: BEIJING	i would like use regulated psu under +/-18VDC.i think regulated psu is good for low voltage high current situation. my loudspeaker is 6ohm,i use unregulated +/-22VDC supply parallel lm4780. z __________________ 2010 DIY ALBUM UPDATED UCPv1(preamp) & DUAL(power supply)

13th January 2010, 08:27 PM	#5
star882 diyAudio Member Join Date: Mar 2007	But with the cost of voltage regulation going down, why not? __________________ "Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!

17th January 2010, 08:37 PM	#6
mjf diyAudio Member Join Date: Jan 2009 Location: upper austria/near linz	[QUOTE=digi01;2044065]i would like use regulated psu under +/-18VDC.i think regulated psu is good for low voltage high current situation. my loudspeaker is 6ohm,i use unregulated +/-22VDC supply parallel lm4780. hello. there is an article. perhaps this can help you. .......don't forget about the heatsinks......... greetings.......... Capacitance Multiplier Power Supply Filter Last edited by mjf; 17th January 2010 at 08:39 PM.


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13th January 2010, 08:23 PM	#4
Leolo diyAudio Member Join Date: Dec 2009 Location: Quebec	Regulation is generaly not necessary for gainclones. The IC used aready has very high supply noise rejection. And one of the features of gainclones is the very very low parts count. Regarding Bose, they are generaly very crappy. The models I've heard had far far to much bass and next to no definition.

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