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/downloads/0/illustrated/illustrated_assembly_manual_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?
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/downloads/0/illustrated/illustrated_assembly_manual_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?
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).
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).
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/view/product.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/view/product.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.
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/view/product.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/view/product.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.
Attachments
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
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.
There are no silly questions...
An insulator is placed between the IC and the heatsink because the metal block in the TDA2616 is internally connected to pin 5, which is the -ve power supply. In a normal installation the heatsink will be at ground potential, and the insulator is thus required to avoid shorting the -ve supply to ground.
I have ordered my transformer 2A Secondary 48VA 12-0-12V and received a 3A as an upgrade I was told.
Is it still suitable for this Kit?
Besides I'm planning to cut a spare mains socket cable to figure 8 as my mains cable to my transformer is it ok?
Is it still suitable for this Kit?
Besides I'm planning to cut a spare mains socket cable to figure 8 as my mains cable to my transformer is it ok?
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