Author Topic: Is barrel jack DC input somewhat standardized?  (Read 811 times)

0 Members and 1 Guest are viewing this topic.

Offline technixTopic starter

  • Super Contributor
  • ***
  • Posts: 3508
  • Country: cn
  • From Shanghai With Love
    • My Untitled Blog
Is barrel jack DC input somewhat standardized?
« on: January 24, 2020, 06:17:17 pm »
As the title suggest, is that thing standardized? Currently most of my projects are designed to expect either 7V-17V or 7V-30V, center positive input. (Most of my project uses 5V or 3.3V internally, which is generated from a barrel jack input using a buck converter TPS562200 or XL1509. TPS562200 supports up to 17V and XL1509 supports up to 40V, I don't have 50V rated SMT caps, so XL1509 based ones get 35V input caps and 30V input rating.) Is that a good design?
 

Offline Bud

  • Super Contributor
  • ***
  • Posts: 7276
  • Country: ca
Re: Is barrel jack DC input somewhat standardized?
« Reply #1 on: January 24, 2020, 07:01:20 pm »
Standardized in what regard? External supply voltage?
Facebook-free life and Rigol-free shack.
 

Offline DBecker

  • Frequent Contributor
  • **
  • Posts: 326
  • Country: us
Re: Is barrel jack DC input somewhat standardized?
« Reply #2 on: January 24, 2020, 07:36:16 pm »
Nope, not at all.

You would think that with the semi-standard size increments for the O.D. and center pin that the size would correspond to the voltage or current, but it doesn't.  Even the polarity isn't ubiquitous, with some vendors preferring that their device blow up rather than lose a power brick sale to a generic product.  (Yes, the insertion detection contact sometimes influences the polarity decisions, but most "reversed" devices don't have internal batteries to disconnect.)

USB is a huge win as a power supply connection because the voltage and polarity are standardized, not at the whim of a marketing department.

 

Offline tooki

  • Super Contributor
  • ***
  • Posts: 13157
  • Country: ch
Re: Is barrel jack DC input somewhat standardized?
« Reply #3 on: January 24, 2020, 09:07:39 pm »
Broadly speaking, no, they are not standardized. There is one exception, though: the EIAJ connector  standard, which maps specific voltage ranges to specific connector sizes that prevent accidentally feeding a higher voltage into a device. Sony and Panasonic largely used these on their gadgets for many years.

https://en.wikipedia.org/wiki/EIAJ_connector
 
The following users thanked this post: nctnico

Offline babysitter

  • Frequent Contributor
  • **
  • Posts: 899
  • Country: de
  • pushing silicon at work
Re: Is barrel jack DC input somewhat standardized?
« Reply #4 on: January 24, 2020, 09:17:13 pm »
But a subset of them has been well standardised in DE but this is withdrawn!
DIN 45323:1982-10 Connectors for coupling an external low-voltage power to portable entertainment equipment

OTOH, I used this standard last year to get matching barrel jack and plug.
I'm not a feature, I'm a bug! ARC DG3HDA
 
The following users thanked this post: tooki


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf