how can they do this?...

[server]

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?



--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

 

[Lasse Langwadt Christensen]

torsdag den 19. november 2020 kl. 16.55.59 UTC+1 skrev jla...@highlandsniptechnology.com:

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?

if you take the wide part of the output pin it is ~6mm^2 that\'s roughly rated for 50 some amps

 

[legg]

On Thu, 19 Nov 2020 07:55:49 -0800, jlarkin@highlandsniptechnology.com
wrote:

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?

material temperature index, layout and fan cooling.

RL

 

[Fred Bloggs]

On Thursday, November 19, 2020 at 10:55:59 AM UTC-5, jla...@highlandsniptechnology.com wrote:

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?



--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

Probably accompanied by a 50oC temperature rise on those power pins.

 

[John Robertson]

On 2020/11/19 9:05 a.m., Fred Bloggs wrote:

On Thursday, November 19, 2020 at 10:55:59 AM UTC-5, jla...@highlandsniptechnology.com wrote:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?
--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

Probably accompanied by a 50oC temperature rise on those power pins.

What is the max insertion count for the female sockets for those pins? I
suspect it is the single digits when run at 50+ Amps...

John :-#(#

 

[legg]

On Thu, 19 Nov 2020 09:51:58 -0800, John Robertson <spam@flippers.com>
wrote:

On 2020/11/19 9:05 a.m., Fred Bloggs wrote:
On Thursday, November 19, 2020 at 10:55:59 AM UTC-5, jla...@highlandsniptechnology.com wrote:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?
--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

Probably accompanied by a 50oC temperature rise on those power pins.


What is the max insertion count for the female sockets for those pins? I
suspect it is the single digits when run at 50+ Amps...

John :-#(#

It\'s a through-hole solder joint.

RL

 

[John Robertson]

On 2020/11/19 11:54 a.m., legg wrote:

On Thu, 19 Nov 2020 09:51:58 -0800, John Robertson <spam@flippers.com
wrote:

On 2020/11/19 9:05 a.m., Fred Bloggs wrote:
On Thursday, November 19, 2020 at 10:55:59 AM UTC-5, jla...@highlandsniptechnology.com wrote:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?
--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

Probably accompanied by a 50oC temperature rise on those power pins.


What is the max insertion count for the female sockets for those pins? I
suspect it is the single digits when run at 50+ Amps...

John :-#(#

It\'s a through-hole solder joint.

RL

I was hoping that was how they got it more reliable.

Thanks,

John :-#)#

 

[legg]

On Thu, 19 Nov 2020 14:02:33 -0800, John Robertson <spam@flippers.com>
wrote:

On 2020/11/19 11:54 a.m., legg wrote:
On Thu, 19 Nov 2020 09:51:58 -0800, John Robertson <spam@flippers.com
wrote:

On 2020/11/19 9:05 a.m., Fred Bloggs wrote:
On Thursday, November 19, 2020 at 10:55:59 AM UTC-5, jla...@highlandsniptechnology.com wrote:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?
--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

Probably accompanied by a 50oC temperature rise on those power pins.


What is the max insertion count for the female sockets for those pins? I
suspect it is the single digits when run at 50+ Amps...

John :-#(#

It\'s a through-hole solder joint.

RL


I was hoping that was how they got it more reliable.

Thanks,

John :-#)#

Didn\'t say they eren\'t crazy.

This is probably a good example of design responsibility
compartmentalization.

In the end, somebody didn\'t explain \'why I can\'t do that\'.
It\'s a misapplication of the mechanical profile, to save
bucks and please sales.

RL

 

[Jasen Betts]

On 2020-11-19, jlarkin@highlandsniptechnology.com <jlarkin@highlandsniptechnology.com> wrote:

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?

tiny?

The pins are M3 (which is 2.5mm diameter at he base of the thread.)
5 square millimeters is sufficient for 53A

--
Jasen.

 

[Jasen Betts]

On 2020-11-19, John Robertson <spam@flippers.com> wrote:

On 2020/11/19 9:05 a.m., Fred Bloggs wrote:
On Thursday, November 19, 2020 at 10:55:59 AM UTC-5, jla...@highlandsniptechnology.com wrote:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?
--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

Probably accompanied by a 50oC temperature rise on those power pins.


What is the max insertion count for the female sockets for those pins? I
suspect it is the single digits when run at 50+ Amps...

I don\'t know of any socket that takes a threaded pin.

--
Jasen.

 

[Rickster C]

On Friday, November 20, 2020 at 6:30:55 AM UTC-5, Jasen Betts wrote:

On 2020-11-19, jla...@highlandsniptechnology.com <jla...@highlandsniptechnology.com> wrote:

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?
tiny?

The pins are M3 (which is 2.5mm diameter at he base of the thread.)
5 square millimeters is sufficient for 53A

Isn\'t the limiting part the contact area? If the entire cross section is required for adequate current density, wouldn\'t it be hard to get enough surface area to lower the contact resistance?

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

 

[server]

On Fri, 20 Nov 2020 11:10:58 -0000 (UTC), Jasen Betts
<usenet@revmaps.no-ip.org> wrote:

On 2020-11-19, jlarkin@highlandsniptechnology.com <jlarkin@highlandsniptechnology.com> wrote:

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?

tiny?

The pins are M3 (which is 2.5mm diameter at he base of the thread.)
5 square millimeters is sufficient for 53A

Thread? The pins aren\'t threaded. The only M3 seems to be the tapped
holes for baseplate mounting.

The 600 watt isolated converter is about one cubic inch. Looks like
the transformer windings are PCB layers.

At 600 watts out and 95% efficiency, it\'s dissipating 30 watts.

They are vague about cooling. They show graphs about air flow but
refer in one note to bolting it to some baseplate or heat sink.

I might have a use for these, but the specs are terrible.




--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

 

[Martin Riddle]

On Fri, 20 Nov 2020 11:12:45 -0000 (UTC), Jasen Betts
<usenet@revmaps.no-ip.org> wrote:

On 2020-11-19, John Robertson <spam@flippers.com> wrote:
On 2020/11/19 9:05 a.m., Fred Bloggs wrote:
On Thursday, November 19, 2020 at 10:55:59 AM UTC-5, jla...@highlandsniptechnology.com wrote:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?
--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

Probably accompanied by a 50oC temperature rise on those power pins.


What is the max insertion count for the female sockets for those pins? I
suspect it is the single digits when run at 50+ Amps...

I don\'t know of any socket that takes a threaded pin.

Top Heatsink Mounting holes are M3, Bottom Pins are soldered.

Crazy thick PCB ~0.300\"

Cheers

 

[server]

On Fri, 20 Nov 2020 11:02:32 -0500, Martin Riddle
<martin_rid@verizon.net> wrote:

On Fri, 20 Nov 2020 11:12:45 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:

On 2020-11-19, John Robertson <spam@flippers.com> wrote:
On 2020/11/19 9:05 a.m., Fred Bloggs wrote:
On Thursday, November 19, 2020 at 10:55:59 AM UTC-5, jla...@highlandsniptechnology.com wrote:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?
--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

Probably accompanied by a 50oC temperature rise on those power pins.


What is the max insertion count for the female sockets for those pins? I
suspect it is the single digits when run at 50+ Amps...

I don\'t know of any socket that takes a threaded pin.

Top Heatsink Mounting holes are M3, Bottom Pins are soldered.

Crazy thick PCB ~0.300\"

Cheers

Murata does cool stuff with PCBs. One isolated dc/dc that we use has a
ferrite toroid embedded *inside* the board.

https://www.dropbox.com/s/owlj2avxb0chku5/Murata_1.JPG?raw=1

https://www.dropbox.com/s/bctkqrmukh2nzae/Murata_3.JPG?raw=1




--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

 

[Klaus Kragelund]

On 20-11-2020 17:00, jlarkin@highlandsniptechnology.com wrote:

On Fri, 20 Nov 2020 11:10:58 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:

On 2020-11-19, jlarkin@highlandsniptechnology.com <jlarkin@highlandsniptechnology.com> wrote:

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?

tiny?

The pins are M3 (which is 2.5mm diameter at he base of the thread.)
5 square millimeters is sufficient for 53A

Thread? The pins aren\'t threaded. The only M3 seems to be the tapped
holes for baseplate mounting.

The 600 watt isolated converter is about one cubic inch. Looks like
the transformer windings are PCB layers.

Yes, planar design. The reason for the thick PCB and the not super high
efficiency

Jitaru / Rompower is known for high performance designs, 99% efficiency:

https://ieeexplore.ieee.org/document/6972125

Of course it comes at a price

At 600 watts out and 95% efficiency, it\'s dissipating 30 watts.

They are vague about cooling. They show graphs about air flow but
refer in one note to bolting it to some baseplate or heat sink.

I might have a use for these, but the specs are terrible.

Which specs are ypu most interested in?

Cheers

Klaus

 

[Jasen Betts]

On 2020-11-20, Martin Riddle <martin_rid@verizon.net> wrote:

On Fri, 20 Nov 2020 11:12:45 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:

On 2020-11-19, John Robertson <spam@flippers.com> wrote:
On 2020/11/19 9:05 a.m., Fred Bloggs wrote:
On Thursday, November 19, 2020 at 10:55:59 AM UTC-5, jla...@highlandsniptechnology.com wrote:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiZjfOR-47tAhUbHzQIHcYzB6YQFjAAegQIAhAC&url=https%3A%2F%2Fpower.murata.com%2Fpub%2Fdata%2Fpower%2Fdre-11_4-53-l48.pdf&usg=AOvVaw0tZ8GLVuRUhQ4N93j9b-EK

53 amps on those tiny pins?
--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

Probably accompanied by a 50oC temperature rise on those power pins.


What is the max insertion count for the female sockets for those pins? I
suspect it is the single digits when run at 50+ Amps...

I don\'t know of any socket that takes a threaded pin.

Top Heatsink Mounting holes are M3, Bottom Pins are soldered.

oops, yeah you\'re right

> Crazy thick PCB ~0.300\"

Yeah. I think there\'s printed widnings for the transformer (\"X\" shape) and the
inductor (\"A\" shape) nside ithat PCB. also the 2KV isolation.

--
Jasen.