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Compact DIY friendly dual TPS7A3301 power supply
Compact DIY friendly dual TPS7A3301 power supply
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Old 22nd May 2016, 07:31 PM   #11
maxw is offline maxw  United Kingdom
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Ahh I didn't see that. Seems daft to provide the IC in a package that requires manual pin bending!
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Old 18th June 2016, 05:12 PM   #12
maxw is offline maxw  United Kingdom
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Got the PCBs back from OSHPark. The purple solder mask always looks so good!
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Old 19th June 2016, 01:34 PM   #13
Nisbeth is offline Nisbeth  Denmark
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Compact DIY friendly dual TPS7A3301 power supply
Looks good (purple solder mask or not )

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Old 19th June 2016, 06:03 PM   #14
maxw is offline maxw  United Kingdom
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And done. No issues at all, worked first time
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Old 19th June 2016, 06:19 PM   #15
OlegSh is offline OlegSh
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Compact DIY friendly dual TPS7A3301 power supply
Looks really professional!

In the future you may consider different fuse holder (see attached example). It hides live contacts from the operator.

Regards,
Oleg
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Old 19th June 2016, 06:23 PM   #16
maxw is offline maxw  United Kingdom
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Quote:
Originally Posted by OlegSh View Post
In the future you may consider different fuse holder (see attached example). It hides live contacts from the operator.
Yeah I wanted to do this but I find it really difficult to search through and select parts from websites like Mauser, RS, Farnell etc. There are just a million options, sometimes associated parts are sold separately, sometimes the pictures aren't accurate, you need read a million datasheets. It's just a difficult process so I went with what I used before and that I knew I had the corresponding Eagle part to suit.

Do you have a part number for this?
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Old 19th June 2016, 06:26 PM   #17
maxw is offline maxw  United Kingdom
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I have two spare PCBs if anyone is interested. Or if someone wants to make their own, attached are the Eagle layout and schematic files and here is the BoM:

Code:
|  Part name | RS part          | Farnell Part | Mouser Part          | Description                                                     | EVM Part name | Notes                |
| ---------- | ---------------- | ------------ | -------------------- | --------------------------------------------------------------- | ------------- | -------------------- |
| C1/C2      | 571319           |              | 667-EEU-FC1V182S     | Large input cap, 7.5mm/18mm                                     | -             |                      |
| C5/C6      | -                |              | 80-C1206C104K5R      | 1206, 0.1uF, X5R or X7R                                         | -             |                      |
| C7/C8      | 7900610          |              | 81-GRM31CR61H106KA2L | 1206, 47uF, X5R or X7R, 2220 package                            | C1            |                      |
| C3A/B      | 7236657          |              | 81-GRM31MR71H105KA88 | 1206, 1uF, X5R or X7R                                           | C3            | NR/SS                |
| C4A/B      | 2644141          |              | 80-C1206C103K1R      | 1206, 10nF/0.01uF, X5R or X7R                                   | C4            | CFF/CBYP             |
| C9-14      | 7900610          |              | 81-GRM31CR61H106KA2L | 1206, 22-15uF, multiple, 2220 package                           | C5-C9         | Total at least 47uF  |
| C15/C16    | 571408 or 571290 |              | 667-EEU-FC1E102      | Large output cap, 5mm/13mm                                      | C10           |                      |
| R1A/B      |                  |              | 667-ERJ-8ENF1244V    | 1.24M                                                           | R1            | Value for -15VDC     |
| R2A/B      |                  |              | 667-ERJ-8ENF1053V    | 105K                                                            | R2            | Value for -15VDC     |
| B1/2       | 8148800          | 1336500      | 625-DFL1508S-E3/77   | VISHAY - DFL1508S-E3/45, BRIDGE RECTIFIER                       |               |                      |
| IC1/IC2    |                  |              | 595-TPS7A3301KC      | LDO Voltage Regulators -3 to -36V,-1A,Ultra Low Noise,High PSRR |               |                      |
| TR1        | 2239216          |              |                      | Block FL6/FL8, Talema/Amveco 5/7VA or standard EI-42            |               |                      |
| F1         | 7874164          |              | 576-64900001039      | 5x20mm Fuseholder 6.3A 250V                                     |               |                      |
| AC         | 403932           |              |                      | 5.08mm Pitch 2 Way 1 Row Straight PCB Header                    |               | AC in                |
| KK1/KK2    |                  |              | 532-513002B25G       |                                                                 |               | Heatsinks, SK104-PAD |
| LED        | -                | -            | -                    | Any 1206 LED                                                    |               |                      |
| RLED       | -                | -            | -                    | To match LEDs                                                   |               |                      |
| X2         |                  |              |                      |                                                                 |               | Power out            |
| Fuse       |                  |              | 530-5ST63-R          | 5x20mm, 63mA                                                    |               |                      |
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Old 19th June 2016, 08:08 PM   #18
OlegSh is offline OlegSh
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Compact DIY friendly dual TPS7A3301 power supply
I could not find such fuse holders at mouser either. I've got mine from conrad.de. May be you'll find similar in the UK.
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Old 30th July 2018, 03:56 AM   #19
mrsavage is offline mrsavage  United States
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Compact DIY friendly dual TPS7A3301 power supply
Default 120 Volt AC Mains Conversion

Your Eagle PCB uses a 240 Volt TR1 Transformer. I need split primary transformer so that I can configure your design for 120 Volt AC Mains.
It looks like this transformer by Nuvotem Talema, Part Number 70033K
would work. It's a 2 x 15 V AC Torodal Transformer that's rated at 7VA with a split dual 115 Volt AC Primaries.


Changing this design means a substitution of the footprint for this transformer
in Eagle. Since I'm need I'm sure I can't undertake this step. Let me know if anyone can help. Take care.

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Old 30th July 2018, 06:17 PM   #20
maxw is offline maxw  United Kingdom
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Quote:
Originally Posted by mrsavage View Post
Part Number 70033K
would work. It's a 2 x 15 V AC Torodal Transformer that's rated at 7VA with a split dual 115 Volt AC Primaries.
Yes, this is the part I used.


Quote:
Originally Posted by mrsavage View Post
Changing this design means a substitution of the footprint for this transformer
in Eagle. Since I'm need I'm sure I can't undertake this step. Let me know if anyone can help
You just need to change the design to have the primaries in parallel, like you already did for my 5V PSU.
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