Thanks
Will you consider providing pbtl version of 3250 using the same PCB but without all the parts like the coilcraft soldered as the stereo version? As I am thinking to build pbtl 3250 and if the cost for such assembled version is affordable to me, I may order two assembled pieces instead of a bare board.
Made some changes to the board to facilitate PBTL operation.
- Short the L+/L- output terminals together, this becomes +.
- Short the R+/R- output terminals together, this becomes - (I think, polarity in PBTL mode isn't clear in the datasheet)
- Remove 2 caps, add two wire links to short the TPA inputs to ground.
- Jumper two locations on the TPI header.
- Left audio input now becomes the main audio input.
At this point I really gotta stop making changes to the thing or it's never getting out 🙂
I need something thick (3mm or more) to clear the component leads on the through hole parts. And it has to be insulating, there's bottom side traces/vias in the area that a conducting thermal pad could short.
The 20x20cm, 4mm thick H48-6G pad from digikey is pretty much the best thing found so far. I don't want to get into buying >$100 sheets of things and cutting them up.
Agreed. I'd thought of having a copper spacer to heatsink/plate adapter. Then graphite foil would be nice to level out.
Cutting sheets on a laser cutter should be easy and "cheap".
Btw. DC Speaker Protection is disabled in PBTL - just a note.
Cutting sheets on a laser cutter should be easy and "cheap".
Btw. DC Speaker Protection is disabled in PBTL - just a note.
Hi gmarsh and all
Might as well sign myself up, to go along with my TI class "D" amp collection and test it out.
I am fine with you taking as long as necessary to incorporate changes and get the Wiener Pro barnacle free first time around.
You have been at it for months now, as it is 🙂
Who is doing the design reviews?
loafimus: 6 x bare Pro PCB w/ microcontrollers
jonners: 1x stereo fully assembled Pro
Pyjamas Before Chris: 1x stereo fully assembled Pro
wushuliu: 1 Pair Assembled PBTL MINUS CONNECTORS - 4 ohm
hepmusic 1 stereo 3118 8 ohm fully assembled
rhing: 1x stereo Wiener 3 Pro, fully assembled + 1x stereo Wiener (both 8 ohm)
williamau:2 x Weiner Pro, fully assembled
BK856er: 1x bare Wiener Pro + microcontroller
shochu: 1x fully assembled stereo + filter & thermal kits
TigerFoo: 1 x fully assembled stereo 8 ohm + filter and thermal kits, 1 pair fully assembled PBTL 8 ohm + filter and thermal kits
boylah: 1xstereo 3118 8 ohm fully assembled
ChuckT
My local GB has taken a life of its own and seems constantly changing and glowing. Up to now there are around:
16 x tpa3118 assembled
15 x tpa3250 assembled
6 x PBTL 3118 assembled
Fjd: 2 x [Stereo Wiener 4 ohm, fully assembled and tested, filter kit, thermal kit] + 2 x [PBTL Wiener 4 ohm, fully assembled and tested, filter kit, thermal kit] + 1 x [The Wiener Pro 4 ohm, fully assembled and tested]
Takayama69 a.k.a Anders Högberg: 1x2CH TPA3118 + 1x TPA3250 : all inclusive. 8 Ohm-versions for both.
mabu0815: 1x Stereo Wiener PCB + 2x PBTL PCBs + 3x microcontroller
Gordon_lo: 2 x Stereo Wiener 8 ohm, fully assembled + 2 x PBTL Wiener 8 ohm, fully assembled + 1 x The Wiener Pro 8 ohm, fully assembled
rchan: 1x fully assembled stereo + filter kits
BBUK: 4 (four) x fully assembled stereo + filter and thermal kits.
lacro: 1 x 3118 Stereo Wiener 8 ohm, fully assembled
DNW: 1x Stereo Wiener 3118 4 ohm (fully assembled) + 1x thermal kit + 1x filter kit stereo for 8 ohm (shipping to Germany)
jorem: 1x Stereo Wiener 3118 4 ohm (fully assembled) + 1x thermal kit
fingerx: 1 stereo 3118 fully assembled + 1x stereo fully assembled Pro
Pinnocchio: 1x bare Wiener Pro + microcontroller
harmolodics: 1x Stereo Wiener 3118 8 ohm (fully assembled)
rsavas: 2x bare Wiener Pro + microcontroller
Might as well sign myself up, to go along with my TI class "D" amp collection and test it out.
I am fine with you taking as long as necessary to incorporate changes and get the Wiener Pro barnacle free first time around.
You have been at it for months now, as it is 🙂
Who is doing the design reviews?
loafimus: 6 x bare Pro PCB w/ microcontrollers
jonners: 1x stereo fully assembled Pro
Pyjamas Before Chris: 1x stereo fully assembled Pro
wushuliu: 1 Pair Assembled PBTL MINUS CONNECTORS - 4 ohm
hepmusic 1 stereo 3118 8 ohm fully assembled
rhing: 1x stereo Wiener 3 Pro, fully assembled + 1x stereo Wiener (both 8 ohm)
williamau:2 x Weiner Pro, fully assembled
BK856er: 1x bare Wiener Pro + microcontroller
shochu: 1x fully assembled stereo + filter & thermal kits
TigerFoo: 1 x fully assembled stereo 8 ohm + filter and thermal kits, 1 pair fully assembled PBTL 8 ohm + filter and thermal kits
boylah: 1xstereo 3118 8 ohm fully assembled
ChuckT
My local GB has taken a life of its own and seems constantly changing and glowing. Up to now there are around:
16 x tpa3118 assembled
15 x tpa3250 assembled
6 x PBTL 3118 assembled
Fjd: 2 x [Stereo Wiener 4 ohm, fully assembled and tested, filter kit, thermal kit] + 2 x [PBTL Wiener 4 ohm, fully assembled and tested, filter kit, thermal kit] + 1 x [The Wiener Pro 4 ohm, fully assembled and tested]
Takayama69 a.k.a Anders Högberg: 1x2CH TPA3118 + 1x TPA3250 : all inclusive. 8 Ohm-versions for both.
mabu0815: 1x Stereo Wiener PCB + 2x PBTL PCBs + 3x microcontroller
Gordon_lo: 2 x Stereo Wiener 8 ohm, fully assembled + 2 x PBTL Wiener 8 ohm, fully assembled + 1 x The Wiener Pro 8 ohm, fully assembled
rchan: 1x fully assembled stereo + filter kits
BBUK: 4 (four) x fully assembled stereo + filter and thermal kits.
lacro: 1 x 3118 Stereo Wiener 8 ohm, fully assembled
DNW: 1x Stereo Wiener 3118 4 ohm (fully assembled) + 1x thermal kit + 1x filter kit stereo for 8 ohm (shipping to Germany)
jorem: 1x Stereo Wiener 3118 4 ohm (fully assembled) + 1x thermal kit
fingerx: 1 stereo 3118 fully assembled + 1x stereo fully assembled Pro
Pinnocchio: 1x bare Wiener Pro + microcontroller
harmolodics: 1x Stereo Wiener 3118 8 ohm (fully assembled)
rsavas: 2x bare Wiener Pro + microcontroller
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Got the costing done. Going to update the first post in a moment with paypal information, updated schematics and things.
Classic Wieners:
Bare PCB and programmed microcontroller: $12.50 CAD.
Add soldered on TPA3118 chip: $15 CAD for total $27.50 CAD.
Fully assembled/tested stereo card: $100 CAD
Fully assembled/tested PBTL card: $105 CAD.
Filter kits: $18 for stereo card, $25 for PBTL card.
Wiener Pro:
Bare PCB and programmed microcontroller: $20 CAD.
Fully assembled/tested board: $185 CAD.
Filter kit (additional components to reconfigure output to 4/6/8 ohms) = $45 CAD. Inductors alone cost me $35 CAD to my door.
Mounting kit (for classic and pro Wieners): $12 CAD.
All costs are calculated based on an assembly quantity of 25 of each board type. From the sounds of it (thanks so much, ChuckT!) that might not be an issue 🙂
And I must repeat my warning: the Pro is a prototype. If all goes well the first crack at the hardware will work great, but there's a chance that boards may be shipped with wire bodges done, or may be delayed due to different parts/PCBs/whatever having to be ordered.
Classic Wieners:
Bare PCB and programmed microcontroller: $12.50 CAD.
Add soldered on TPA3118 chip: $15 CAD for total $27.50 CAD.
Fully assembled/tested stereo card: $100 CAD
Fully assembled/tested PBTL card: $105 CAD.
Filter kits: $18 for stereo card, $25 for PBTL card.
Wiener Pro:
Bare PCB and programmed microcontroller: $20 CAD.
Fully assembled/tested board: $185 CAD.
Filter kit (additional components to reconfigure output to 4/6/8 ohms) = $45 CAD. Inductors alone cost me $35 CAD to my door.
Mounting kit (for classic and pro Wieners): $12 CAD.
All costs are calculated based on an assembly quantity of 25 of each board type. From the sounds of it (thanks so much, ChuckT!) that might not be an issue 🙂
And I must repeat my warning: the Pro is a prototype. If all goes well the first crack at the hardware will work great, but there's a chance that boards may be shipped with wire bodges done, or may be delayed due to different parts/PCBs/whatever having to be ordered.
Hi
Downloaded PayPal.. and ready to chip in. Some new Q's though:
1. According to TIs site: "An LC filter is critical in helping you reduce electromagnetic radiation (EMI) of Class-D amplifiers. In some
Class-D amplifiers, you also need the LC filter to ensure high efficiency outputs"
'Critical' sounds dramatic..as if filters more or less is mandatory. Is it in your opinion?
2. Post and packaging.. have I just missed a post.. or how is it handled? Shall i pay in advance.. and how much for 1 or 2 assembled boards to Sweden?
BR
Anders
Downloaded PayPal.. and ready to chip in. Some new Q's though:
1. According to TIs site: "An LC filter is critical in helping you reduce electromagnetic radiation (EMI) of Class-D amplifiers. In some
Class-D amplifiers, you also need the LC filter to ensure high efficiency outputs"
'Critical' sounds dramatic..as if filters more or less is mandatory. Is it in your opinion?
2. Post and packaging.. have I just missed a post.. or how is it handled? Shall i pay in advance.. and how much for 1 or 2 assembled boards to Sweden?
BR
Anders
Hi Gmarsh,
As you have amended the Pro PCB to support PBTL, do you feel confident enough to provide Pro PBTL version assembled? Or you want to do this in future GB?
As you have amended the Pro PCB to support PBTL, do you feel confident enough to provide Pro PBTL version assembled? Or you want to do this in future GB?
I should be able to provide Pro PBTLs from the outset.
If you want a "permanently PBTL" board and want to save about $10/board, I could leave the unused audio input components unpopulated.
Thanks!
I received two identical payments, I'm gonna assume that was an error. I refunded the 2nd one.
Standard rate ($185 CAD) for a Wiener Pro converted into PBTL mode. Converting this board back into stereo operation would be a straightforward job - remove the PBTL mode jumpers and install two provided capacitors. $370 for two cards, $388 CAD shipped.
$175 CAD for a "permanently PBTL" board. None of the parts on the unused audio input are populated. $350 for two cards, $368 CAD shipped.
Correction to the above: shipping for Pro's to non-US addresses is $25, not $18.
So two "PBTL modded" cards shipped to HK: $395, two "permanent PBTL" cards: $375.
So two "PBTL modded" cards shipped to HK: $395, two "permanent PBTL" cards: $375.
Hi, here is my finalize GB
TPA3118 Full assembled ($100)
4 Ohm x 2
6 Ohm x 5
8 Ohm x 11
16 Ohm x 1
Filter kit for 8 Ohm board ($18) x 2
Termal kit x 5
TPA3250 Pro full assembled ($185)
4 Ohm x 2
8 Ohm x 11
16 Ohm x 1
Filter Kit ($45 for 1x8ohm, 1x 4ohm ) x 2
TPA3118 PBTL full assembled ($105)
4 Ohm x 2
8 Ohm x 2
Bare TPA3250 Pro board + micro ($40) x 2
Bare TPA3118 PBTL board + micro ($12) x 4
Could you sent me the total amount and estimate the shipping cost for those order.
Thanks. Will pay you as soon as total confirmed.
TPA3118 Full assembled ($100)
4 Ohm x 2
6 Ohm x 5
8 Ohm x 11
16 Ohm x 1
Filter kit for 8 Ohm board ($18) x 2
Termal kit x 5
TPA3250 Pro full assembled ($185)
4 Ohm x 2
8 Ohm x 11
16 Ohm x 1
Filter Kit ($45 for 1x8ohm, 1x 4ohm ) x 2
TPA3118 PBTL full assembled ($105)
4 Ohm x 2
8 Ohm x 2
Bare TPA3250 Pro board + micro ($40) x 2
Bare TPA3118 PBTL board + micro ($12) x 4
Could you sent me the total amount and estimate the shipping cost for those order.
Thanks. Will pay you as soon as total confirmed.