[TechAssist] Re: STK392-560, STK392-570 info
- From: electronicabills@xxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 19 Oct 2005 22:11:04 -0400
Hi Leonard
The datasheets for both STK's are available on our web
you can download or print them from there
you can found them as follows
Go to on-line shopping
Quick search-type part number- partial entry is exceptable
click on part
click on PDFfile
there you have it
Bill Poulos
ELECTRONICA
2828 E. Colfax Ave
Denver,CO. 80206
1-303-322-3037
1-303-322-1135fax
www.electronica-usa.com
-----Original Message-----
From: Leonard Caillouet <lcaillo@xxxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx
Cc: sales@xxxxxxxxxxxxxx; Ronnie Hertz <rhertz@xxxxxxxxxxxxxxxxx>
Sent: Wed, 19 Oct 2005 17:54:39 -0400
Subject: [TechAssist] STK392-560, STK392-570 info
FYI,
Installed a STK392-570 in place of the -560 in the Sony RA6 chassis after
verifying that the circuits using the two are nearly identical and the pins
are the same. The -570 is used in the Mitsubishi V18 chassis.
Found that the performance was identical and the temperature
was identical, other than one chip runs hotter because the channels are not
balanced. One chip has 2 vertical and one horizontal channels and one has 2
h and 1 v channel. I swapped the two versions and the performance was the
same in the other position, i.e. the temperature difference is due to the
location, not the version of the chip. I then replaced the remaining -560
with another -570 that I had in stock and it blew fuses. The second -570
was a TT-STK392-570 from Tritronics which had no date code on it. Recall
the email from B&D regarding bad chips with no date code. The one that I
used first was from Mitsubishi and was date coded and worked fine, with very
little variation in output compared to the Sony part.
I found a distributor that claims to be Sanyo authorized with the following
info:
http://beomil.com/datasheet/INTEGRATED/Video.htm
STK392-560 max = 5.0A, fH max=33.75kHz V +/-35,+/-24
STK392-570 max = 8.0A, fH max=100kHz V +/-40,+/-24
The Mitsubishi V18 chassis that uses the -570
runs with a higher +/- supplies than the Sony circuit. The Sony circuit
uses more resistive loading on the outputs, however. The chips in the Sony
set run
at 60-65 degrees C. We'll see how these work in this set and likely only
stock the -570, because of the higher ratings for max current,
bandwidth, and supply range.
I now think I understand now why the Mitsubishi sets usually fail on the
vertical
channels. The vertical channels are in one chip and the horizontal in the
other. The
vertical is corrected with waveforms at the horizontal rate and vice versa.
The
higher frequency correction likely causes them to run hotter.
Leonard Caillouet
Electronics World
1261 NW 76 Blvd
Gainesville, FL 32606
352-332-5608
352-332-5668 fax
----- Original Message -----
From: <sales@xxxxxxxxxxxxxx>
To: <lcaillo@xxxxxxxxxxxx>
Sent: Wednesday, October 19, 2005 3:18 PM
Subject: Your ACME Enterprises order
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> --PRODUCT INFORMATION--
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> Product: STK392-570 ($ 12.99 ea.)
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