|21st June 2014, 12:21 AM||#1|
Join Date: Jan 2003
Location: mississauga ontario canada
GB for TPA3116/8 PBTL bare pcb
Edited 26 July 2014
Edited 12 September 2014
I am offering this board for those who wish to tinker with some input and output components.
This board is a PBTL version of the TPA3116D2DAD (or TPA3118D2DAP) based on the schematic in the data sheet here:
A few note about this design.
The board colour is green, 0.062”(1.6mm), 1oz. Copper and approximately 3.535” x 2.25” with four mounting holes (0.173”… 4.4mm).
The non-electrolytic caps are all SMD, as are the resistors.
The mute on powerup is a simple circuit and you may omit some of it if you wish.
Pins for mode and AM interference are all as in the datasheet schematic.
The Amp footprint will accommodate the bottom thermal pad of a TPA3118D2DAP with 14 vias for thermal transfer.
There is a selection of inductors that will fit this board. Here is a list of some SMD that will fit:
COILCRAFT RFS1412 10uH 6.2A(10%L drop) RFS1412-103ME
WURTH WE-PD SMD 10uH 10.5A(10%L drop) 7447709100
SUMIDA CDEP 10uH 11.5A(10%L drop) CDEP147NP-100MC-125
COILCRAFT SER2900 10uH 13A(10%L drop) SER2915L-103KL
COILCRAFT SER2900 10uH 18A(10%L drop) SER2915H-103KL
WURTH WE-HCF SMD 10uH 22A(10%L drop) 7443631000
COILCRAFT SER2900 10uH 28A(10%L drop) SER2918H-103KL
WURTH WE-HCF SMD 10uH 34A(10%L drop) 7443641000
There are some toroids that will fit and I have through holes for them.
The power and speaker output can be connected with Weidmuller, Wieland, or other types with 0.2” (5.08mm) centres (holes are 0.051”…1.3mm) (or direct wire)
Mounting holes for a TPA3116 top heatsink or solder to the board TPA3118 type (14 vias)
Input caps are 0805/1206/1210/through-hole @0.1"LS/0.037" holes.
Power electrolytics (one on each end of IC) are 0.63”(16mm) dia with 0.30”(7.62mm) lead spacing mainly to accommodate higher output powers.
Power supply HF bypass are 1206. (2 each end of IC)
Inductor footprint will take at least 5 different types and also has two sets of through holes. See above list.
Filter and snubber footprints (top side) are 1206 with exposed copper on the bottom ground plane for other larger parts.
Exposed copper below the input area for ground plane extension for those using really large input caps.
Startup mute circuitry.
I have added the snubber directly on the outputs as in the ap note. The R is 1206 and the C is 0805.
Avcc has been separated with a series R and bypass cap. (both 0805)
Bootstrap caps are 0805 but I have exposed the copper on the output traces for 1210's and you could stand them up and use small wires down to the 0805 pads.
Insulated (from GND) mounting holes.
Pairs of boards could be ordered with a common ground plane.
I am panelizing the board this week and should be able to order on the weekend or early next week.
Then I will be working on the parts list and a kit.
You will get a schematic and suggested parts list with the board…feel free to experiment.
I will use Canada Post and one board in a package is approximately 50gms.
Shipping cost estimations can be done somewhere on the Canada Post site:
(L5N 2W7 if it asks for a ship from Canada postal code)
Board cost is $CDN 8.00 plus postage. (buy 9 and get one for free) Paypal or Interac e-Transfer
$7CDN for the IC supplied
$7CDN for the soldering of the IC on the board (and TESTED) (added 12 July 2014)
(board with IC soldered $22CDN total)
Kit price is $25CDN. Kit does not include IC. (26 July 2014)
Installation of the kit is $18CDN (aprox 29 Sept 2014)
This price is for the first 20 kits. (added 12 September 2014, as of today 12 requests)
Boards ordered as a "pair" will be connected and have a common ground plane. (same price per board, etc.) (added 11 July 2014)
PM and e-mail will be for payment and shipping details.
First time GB...please be patient.
Look at post # 73 for latest board view...I can't seem to edit the one below.
Actual pix of shipped bards in post #171 and built up in #182. (added 12 Sept 2014)
BOM (just my suggestions) and parts placement are in post #180. (added 12 Sept 2014)
Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
Last edited by DUG; 21st October 2014 at 02:02 AM.
|23rd June 2014, 01:47 PM||#4|
Join Date: Apr 2013
Hi, seemed I missed this earlier I have a question if decoupling PVCC will be possible with slightly larger SMD's or how does the pcbtrack from pvcc chippins connect to these 2(4) 0805 positions, is there a little room there?
|23rd June 2014, 03:06 PM||#6|
Join Date: Jan 2003
I have been in other group buys where they kept a running list, made it easier to track, so if it's OK I will start a list
hajj 2 boards
rafalkac 9 boards + 1 free board
goocher89 1 board
randytsuch 2 boards
If this works for you dug, then people should just keep adding their names and numbers to the list
Also, if people want to do things like change quantities or remove themselves it is easier.
One problem I have seen with this type of list is sometimes people don't grab the latest one when they add themselves, and accidentally drop others off the list, so everyone should periodically make sure the list is still accurate.
My system is here
|23rd June 2014, 07:38 PM||#8|
Join Date: Feb 2013
I have never put together a kit like this before, but it looks like this will be a good start for me.If there is any challenge for me, I think it will be identifying which part goes to the slot and how to orient the part if there is polarity. I am hoping the part will have identification on it.
Kindly put me in for 2 boards.
Thank you for putting this together.
|23rd June 2014, 09:54 PM||#10|
Join Date: Jul 2005
Couple of quick questions Dug.
Will your board incorporate the mod around AVCC that abraxalito did separating pin 17?
I am a little unclear as to the resulting power available from PBTL. The datasheet says "MONO mode enabling up to 100W output power" and the circuit diagram shows 100watt into 2 ohm. Do you get 100watt into 4 or 8 ohm or is tho output reduced? I assume the LC filter will need adjustment for the impedance being driven, is this designed on same basis as straight BTL amplifier?
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