Has anyone tried these out?

Dougie085 · 10th November 2007, 09:28 PM

Just curious if anyones built one of these or what not.

http://chip-pcb.cn/7300/4702-E.htm

I know its not the traditional chipamp but uses a chip (LM4702) for the driver and fets for the outputs. Thinking about trying it out as its pretty cheap for one. I may have to upgrade some of the caps and what not but looks interesting.

theAnonymous1 · 10th November 2007, 09:37 PM

There is thread about this configuration here.....

Sound quality question

I think the better solution is to use the new LME49810 instead.....

LME49810 - a new cousin for LM4702

Dougie085 · 10th November 2007, 09:42 PM

Ok I was trying to search but really just couldn't think of what to search for to get a specific result. I was looking at the 4702 model because it's quite a bit cheaper.

SpittinLLama · 13th November 2007, 10:00 PM

These seem to be very good designs all around. I would check into the protection of the LM4702 and LME49810 modules since they do not have protection on the chip for the output stage. Prices look very nice too.

-SL

Dougie085 · 13th November 2007, 10:05 PM

Yeah they have a protection circuit. Although not sure I'd use it

http://chip-pcb.cn/7300/SPP-A.htm

Leolabs · 14th November 2007, 02:04 AM

Luckily they have the drivers to drive MOSFETs.

Dougie085 · 14th November 2007, 02:05 AM

What do you mean?

Leolabs · 15th November 2007, 12:44 AM

The LM4702 does not have the sufficient output current to drive MOSFETs optimally,so you need a driver stage.

Dougie085 · 15th November 2007, 12:46 AM

So you don't think its a good design or what?

Leolabs · 15th November 2007, 12:47 AM

It's good design.

10th November 2007, 09:28 PM	#1
Dougie085 diyAudio Member Join Date: Nov 2005 Location: Ohio	Has anyone tried these out? Just curious if anyones built one of these or what not. http://chip-pcb.cn/7300/4702-E.htm I know its not the traditional chipamp but uses a chip (LM4702) for the driver and fets for the outputs. Thinking about trying it out as its pretty cheap for one. I may have to upgrade some of the caps and what not but looks interesting.

10th November 2007, 09:37 PM	#2
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	There is thread about this configuration here..... Sound quality question I think the better solution is to use the new LME49810 instead..... LME49810 - a new cousin for LM4702 __________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja

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10th November 2007, 09:42 PM	#3
Dougie085 diyAudio Member Join Date: Nov 2005 Location: Ohio	Ok I was trying to search but really just couldn't think of what to search for to get a specific result. I was looking at the 4702 model because it's quite a bit cheaper.

13th November 2007, 10:00 PM	#4
SpittinLLama diyAudio Member Join Date: Apr 2005 Location: In the Wild, Wild West	These seem to be very good designs all around. I would check into the protection of the LM4702 and LME49810 modules since they do not have protection on the chip for the output stage. Prices look very nice too. -SL

13th November 2007, 10:05 PM	#5
Dougie085 diyAudio Member Join Date: Nov 2005 Location: Ohio	Yeah they have a protection circuit. Although not sure I'd use it http://chip-pcb.cn/7300/SPP-A.htm

14th November 2007, 02:04 AM	#6
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Luckily they have the drivers to drive MOSFETs.

14th November 2007, 02:05 AM	#7
Dougie085 diyAudio Member Join Date: Nov 2005 Location: Ohio	What do you mean?

15th November 2007, 12:44 AM	#8
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	The LM4702 does not have the sufficient output current to drive MOSFETs optimally,so you need a driver stage.

15th November 2007, 12:46 AM	#9
Dougie085 diyAudio Member Join Date: Nov 2005 Location: Ohio	So you don't think its a good design or what?

15th November 2007, 12:47 AM	#10
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	It's good design.

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