P
Pamela
Guest
How does Qualcomm Quick Charge sense the presence on another compatible
device.
Isit looking for voltahe on certain USB pins?
device.
Isit looking for voltahe on certain USB pins?
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P
Pamela
Guest
On 23:07 25 Jun 2022, Dave Platt said:
I found it here. https://www.onsemi.com/pdf/datasheet/ncp4371-d.pdf
It looks rather complicated to me but it seems there\'s some suprisingly
elaborate signalling involved. Figure 20 seems to suggest that 2 if not 3
leads get utilised for signalling.
In article <XnsAEC1DC911997C37B93@88.198.57.247>,
Pamela <pamela.private.mailbox@gmail.com> wrote:
How does Qualcomm Quick Charge sense the presence on another compatible
device.
Is it looking for voltage on certain USB pins?
Basically, yes. There\'s a whole negotiation process which takes place
between the device, and the dedicated charging port. Take a look at
the data sheet for the On Semiconductor NCP4371 for some of the
details.
I found it here. https://www.onsemi.com/pdf/datasheet/ncp4371-d.pdf
It looks rather complicated to me but it seems there\'s some suprisingly
elaborate signalling involved. Figure 20 seems to suggest that 2 if not 3
leads get utilised for signalling.
A
a a
Guest
On Saturday, 25 June 2022 at 22:41:38 UTC+2, Pamela wrote:
quick charge devices detect higher charging voltage and accept higher voltage since current is limited by diameter of the wire/s in the charging cable and by internal circuit board.How does Qualcomm Quick Charge sense the presence on another compatible
device.
Isit looking for voltahe on certain USB pins?
J
Jasen Betts
Guest
On 2022-06-25, Pamela <pamela.private.mailbox@gmail.com> wrote:
It\'s looking for a quick-charge chip at the other end of the USB cable.
--
Jasen.
How does Qualcomm Quick Charge sense the presence on another compatible
device.
Isit looking for voltahe on certain USB pins?
It\'s looking for a quick-charge chip at the other end of the USB cable.
--
Jasen.
D
Dave Platt
Guest
In article <XnsAEC1DC911997C37B93@88.198.57.247>,
Pamela <pamela.private.mailbox@gmail.com> wrote:
Basically, yes. There\'s a whole negotiation process which takes place
between the device, and the dedicated charging port. Take a look at
the data sheet for the On Semiconductor NCP4371 for some of the
details.
Pamela <pamela.private.mailbox@gmail.com> wrote:
How does Qualcomm Quick Charge sense the presence on another compatible
device.
Isit looking for voltahe on certain USB pins?
Basically, yes. There\'s a whole negotiation process which takes place
between the device, and the dedicated charging port. Take a look at
the data sheet for the On Semiconductor NCP4371 for some of the
details.
L
Lasse Langwadt Christensen
Guest
søndag den 26. juni 2022 kl. 00.07.44 UTC+2 skrev Dave Platt:
and QC4 now also supports USB-PD over USB-C
I assume in preperation for the EU mandate that phones/tablets etc. must charge via USB-C, and support USB-PD if the higher power is needed
In article <XnsAEC1DC9...@88.198.57.247>,
Pamela <pamela.priv...@gmail.com> wrote:
How does Qualcomm Quick Charge sense the presence on another compatible
device.
Isit looking for voltahe on certain USB pins?
Basically, yes. There\'s a whole negotiation process which takes place
between the device, and the dedicated charging port. Take a look at
the data sheet for the On Semiconductor NCP4371 for some of the
details.
and QC4 now also supports USB-PD over USB-C
I assume in preperation for the EU mandate that phones/tablets etc. must charge via USB-C, and support USB-PD if the higher power is needed