Groups > sci.electronics.design > #460992

Re: USB Type C to USB 3 adapters

From	cameo <cameo@unreal.invalid>
Newsgroups	sci.electronics.design
Subject	Re: USB Type C to USB 3 adapters
Date	2017-05-19 16:14 -0700
Organization	A noiseless patient Spider
Message-ID	<ofntuf$c8d$1@dont-email.me> (permalink)
References	<ofb0hu$4ve$1@dont-email.me> <mf2ihcl53knljo9t30hhssnf2uitjnkrmb@4ax.com>

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On 5/14/2017 6:58 PM, krw@notreal.com wrote:
> On Sun, 14 May 2017 18:39:29 -0700, cameo <cameo@unreal.invalid>
> wrote:
> 
>> Looking for such adapters for my new phone with Type C USB port, I
>> noticed that several adapter and cable ads mention a built-in 56K
>> resistor that is supposed to serve fast charging. I wonder if it's
>> really needed and what happens when one uses fast chargers without such
>> resistors or slow chargers with them as I am not familiar with the
>> underlying theory here. Basically I want to get adapters not only for
>> fast charging but also for fast file transfer between the phone and a
>> PC's USB3 port, though I'm not sure that Type C USB can even match the
>> speeds possible with USB3.
>>
>> Can anybody comment on this issue?
> 
> Type-C is a connector and USB3.1 is a signaling standard.  Type-C
> *usually* uses USB3.1 signaling but it's perfectly valid to use other
> USB signaling and a type-C connector.
> 
> As far as charging goes, the resistor just fakes the host's charger
> into a higher current limit than the device will claim for itself.  It
> won't charge it any faster.  It may allow an old device that doesn't
> know the secret handshake to charge faster (or at all) but it's not
> magic.  Of course telling a slow charger that it has a "fast charge"
> device on it will do exactly nothing.
> 
Apropos, what's the difference between USB 3.0 and USB 3.1 standards?

Thread

USB Type C to USB 3 adapters cameo <cameo@unreal.invalid> - 2017-05-14 18:39 -0700
  Re: USB Type C to USB 3 adapters krw@notreal.com - 2017-05-14 21:58 -0400
    Re: USB Type C to USB 3 adapters cameo <cameo@unreal.invalid> - 2017-05-16 19:02 -0700
    Re: USB Type C to USB 3 adapters cameo <cameo@unreal.invalid> - 2017-05-19 16:14 -0700
      Re: USB Type C to USB 3 adapters krw@notreal.com - 2017-05-19 22:54 -0400
        Re: USB Type C to USB 3 adapters cameo <cameo@unreal.invalid> - 2017-05-20 20:22 -0700
          Re: USB Type C to USB 3 adapters krw@notreal.com - 2017-05-21 16:45 -0400
            Re: USB Type C to USB 3 adapters cameo <cameo@unreal.invalid> - 2017-05-21 17:27 -0700
  Re: USB Type C to USB 3 adapters Jasen Betts <jasen@xnet.co.nz> - 2017-05-23 11:54 +0000
    Re: USB Type C to USB 3 adapters rickman <gnuarm@gmail.com> - 2017-05-23 11:35 -0400
      Re: USB Type C to USB 3 adapters Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-05-23 08:58 -0700
        Re: USB Type C to USB 3 adapters rickman <gnuarm@gmail.com> - 2017-05-23 12:01 -0400
          Re: USB Type C to USB 3 adapters krw@notreal.com - 2017-05-23 19:11 -0400
      Re: USB Type C to USB 3 adapters cameo <cameo@unreal.invalid> - 2017-05-23 15:21 -0700
        Re: USB Type C to USB 3 adapters krw@notreal.com - 2017-05-23 19:12 -0400
          Re: USB Type C to USB 3 adapters cameo <cameo@unreal.invalid> - 2017-05-23 18:08 -0700
            Re: USB Type C to USB 3 adapters krw@notreal.com - 2017-05-23 21:32 -0400
            Re: USB Type C to USB 3 adapters rickman <gnuarm@gmail.com> - 2017-05-24 01:20 -0400
        Re: USB Type C to USB 3 adapters rickman <gnuarm@gmail.com> - 2017-05-23 19:18 -0400
      Re: USB Type C to USB 3 adapters krw@notreal.com - 2017-05-23 19:05 -0400

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