STK428-610 STK428-640 Reference design ?

CAindoAUDIO · 29th November 2007, 01:30 PM

Hello all,

I have a couples of these ICs and wonder if someone can point me to a design (around these chips) to get me started.

Thank you in advance.

-_nando-_ · 29th November 2007, 11:07 PM

WHERE did you get these chips ? I can't find them any where !

CAindoAUDIO · 30th November 2007, 02:59 AM

Nando,

If in Brazil, you know better than me. But in the States many places.
Here's one one
Try Google and you will find them. Hope that help.

P.S. Regarding the design. I have a STK428-640 datasheet from Sanyo in Japanese. There's some kind design (circuit) in it, but as we know there are million of odds and ends in this hobby. I am not comfortable with wiring up a design with the rest of instructional text in another language.

Ouroboros · 30th November 2007, 08:04 AM

I have the full data sheet (including standard application circuit) for the STK428-430, which is the DIP version of the STK428-630, I could email it to you if you want.

-_nando-_ · 30th November 2007, 12:24 PM

Could you also send this datasheet to me?

Well, I also have the Japanese version, and the schematic only have the name of the parts, like "C10", "R14"... No values, and everything is in japanese

This module might be VERY good, it's carrier frequency is pretty high, and as I could read in the product brief (english), it have focus on quality.

I'd love to get one of these chips and have the full datasheet.

Did you buy from this site that you sent the link?

Ouroboros · 30th November 2007, 01:04 PM

Hi nando, I've sent you an email giving you my contact email at work. Drop me a private email and I'll send you the datasheet.

The amps are high quality (ICEpower), but I was looking at using them to drive step-up transformers for 100V-line PA applications, and like most pre-filter feedback amps, they don't like a load that can change a lot. (100V amps have to cope with wildly verying loads depending on the number and power-tappings of the speakers attached).

CAindoAUDIO · 30th November 2007, 03:55 PM

Could you please send me a copy of STK428-430's datasheet as well. Thank you.
I took a closer look at the Japanese datasheet. Apparently, they're intended for 2-way speaker system. Dual-channel, with one channel's response 20-20KHz 150W 0.8% THD into 8 Ohm and the other's response 1KHz 200W 10% THD into 4 Ohms. These specs are way downgraded compared to B&O's standard ICE modules. It could be the COM & MECC can not be fully implemented on the same die/wafer ? (I wonder)

29th November 2007, 01:30 PM	#1
CAindoAUDIO diyAudio Member Join Date: Jun 2006	STK428-610 STK428-640 Reference design ? Hello all, I have a couples of these ICs and wonder if someone can point me to a design (around these chips) to get me started. Thank you in advance.

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29th November 2007, 11:07 PM	#2
-_nando-_ diyAudio Member Join Date: Dec 2005 Location: Sao Paulo	WHERE did you get these chips ? I can't find them any where !

30th November 2007, 02:59 AM	#3
CAindoAUDIO diyAudio Member Join Date: Jun 2006	Nando, If in Brazil, you know better than me. But in the States many places. Here's one one Try Google and you will find them. Hope that help. P.S. Regarding the design. I have a STK428-640 datasheet from Sanyo in Japanese. There's some kind design (circuit) in it, but as we know there are million of odds and ends in this hobby. I am not comfortable with wiring up a design with the rest of instructional text in another language.

30th November 2007, 08:04 AM	#4
Ouroboros diyAudio Member Join Date: Dec 2003 Location: Nottingham UK	I have the full data sheet (including standard application circuit) for the STK428-430, which is the DIP version of the STK428-630, I could email it to you if you want.

30th November 2007, 12:24 PM	#5
-_nando-_ diyAudio Member Join Date: Dec 2005 Location: Sao Paulo	Could you also send this datasheet to me? Well, I also have the Japanese version, and the schematic only have the name of the parts, like "C10", "R14"... No values, and everything is in japanese This module might be VERY good, it's carrier frequency is pretty high, and as I could read in the product brief (english), it have focus on quality. I'd love to get one of these chips and have the full datasheet. Did you buy from this site that you sent the link?

30th November 2007, 01:04 PM	#6
Ouroboros diyAudio Member Join Date: Dec 2003 Location: Nottingham UK	Hi nando, I've sent you an email giving you my contact email at work. Drop me a private email and I'll send you the datasheet. The amps are high quality (ICEpower), but I was looking at using them to drive step-up transformers for 100V-line PA applications, and like most pre-filter feedback amps, they don't like a load that can change a lot. (100V amps have to cope with wildly verying loads depending on the number and power-tappings of the speakers attached).

30th November 2007, 03:55 PM	#7
CAindoAUDIO diyAudio Member Join Date: Jun 2006	Could you please send me a copy of STK428-430's datasheet as well. Thank you. I took a closer look at the Japanese datasheet. Apparently, they're intended for 2-way speaker system. Dual-channel, with one channel's response 20-20KHz 150W 0.8% THD into 8 Ohm and the other's response 1KHz 200W 10% THD into 4 Ohms. These specs are way downgraded compared to B&O's standard ICE modules. It could be the COM & MECC can not be fully implemented on the same die/wafer ? (I wonder)

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