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Old 8th January 2007, 07:33 PM   #1
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Default Velleman K4003 power supply

Hi,

I recently bought a K4003 kit from Velleman, which is a 2x 30W chip amp built with TDA2616. (info here: http://www.velleman-kit.com/download...k4003_rev1.pdf)

I want to put the amp in my car, connecting the speakers and my mp3 player. What transformer should I look for?
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Old 10th January 2007, 02:26 PM   #2
em2006 is offline em2006  Romania
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Your amplifier is designed for mains fed applications, the circuit is optimally designed for symmetrical power supplies.

Velleman K4003 stereo amplifier needs a supply voltage 2X12VAC/2A(50W).
This amp cannot supply from car's battery directly, you need a CONVERTER (or, you can use two batteries - see manual Page 8 - but it is a inconvenient solution).
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Old 10th January 2007, 07:37 PM   #3
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Thanks for your reply em2006

What kind/model of converter should I be looking for then? Any suggestions on where can I get more informed about it?

Cheers,
Gnitrops
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Old 10th January 2007, 11:04 PM   #4
em2006 is offline em2006  Romania
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I want to know about your MP3 player you want to put in your car:
-supply voltage
-power consumption, or amperage
to choose a converter suitable for both units (amplif + CD player).
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Old 20th January 2007, 07:33 PM   #5
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The MP3 Player is a MuVo, takes a normal 1.5V AAA battery (currently using a 850mAh rechargeable).
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Old 28th January 2007, 01:08 AM   #6
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Anyone can give me a hand, or some directions, here? Thanks in advance
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Old 28th January 2007, 05:23 PM   #7
em2006 is offline em2006  Romania
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The best solution is to buy an amplifier that need 12VDC power suplly.
The K4003 needs a symetric power supply (double power supply).

If you'll try to use a single supply, you will destroy the amplifier.

The Velleman K4003 is constructed to use a transformer connected to mains voltage:
-version 1 - OPEN-FRAME TRANSFORMER 48VA 2 x 12V / 2 x 2A
Order Code: 212048
http://www.velleman.be/es/en/product...ct.asp?id=997#
-version 2 - TOROIDAL TRANSFORMER 50VA 2 x 12V / 2 x 2.08A
Order Code: 5012
http://www.velleman.be/es/en/product...t.asp?id=1909#

If you want to use a car battery anyway, two solutions are posible:
1- a transformer above mentioned and a DC/AC converter wich converts the
12VDC to 230VAC (see attached solution1.png)
2-a DC/DC converter wich converts the 12VDC to 2x15VDC (see attached solution2.png)

The 2nd solution is preferable.

Using the converters in this application is an inconvenient solution.
Is more simple, reliable and cheaper to buy an amplifier that need 12VDC power suplly.
Attached Images
File Type: png solution1.png (8.3 KB, 349 views)
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Old 28th January 2007, 05:27 PM   #8
em2006 is offline em2006  Romania
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Quote:
Originally posted by em2006
...
2-a DC/DC converter wich converts the 12VDC to 2x15VDC (see attached solution2.png)...
Attached Images
File Type: png solution2.png (7.7 KB, 339 views)
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Old 18th February 2011, 02:25 PM   #9
Baztien is offline Baztien  France
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Hoping this forum is still beeing read, here is my questions:
I'm trying to select a power supply for my K4003 and I've selected few transformer:
-Maplin N57JB
-Rapid electronics VTX-126-050-212
-RS 504-672

Is that the kind of transfo required? would you recommend any?

Last question: I bought my K4003 second hand so I'm not 100% sure I've got all the component. I'm not sure about the insulator. I've got a small transparent plastic sheet with a hole in it. I read insulator can be made of silicone so I'm thinking it could be that but I'd rather be sure.

many thanks
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Old 18th February 2011, 02:52 PM   #10
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Quote:
Originally Posted by Baztien View Post
Hoping this forum is still beeing read, here is my questions:
I'm trying to select a power supply for my K4003 and I've selected few transformer:
-Maplin N57JB
-Rapid electronics VTX-126-050-212
-RS 504-672

Is that the kind of transfo required? would you recommend any?

Last question: I bought my K4003 second hand so I'm not 100% sure I've got all the component. I'm not sure about the insulator. I've got a small transparent plastic sheet with a hole in it. I read insulator can be made of silicone so I'm thinking it could be that but I'd rather be sure.

many thanks
Any of those three transformers will be suitable.

It sounds like you have correctly identified the mounting insulator for the TDA2616.
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