Diskuze - danyk.cz

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Celkem 5 odpovědí.


6.06.2022 (15:47:19) K # IP X
toman:
Toz, nech to mame z krku na dnes, "ty debile to prece vi kazdy, takovou banalni vec, ses totalni debil". **02 Kedze jediny perspektivny USB konektor je USB-C, tak bacha na to, ze USB-C nabijacka nedava vonku ani prd, narozdiel od starsich s USB-A koncovkou kde tych 5V 500mA bolo vzdy. V celom to standarte je uplny mrdnik a protichodne tvrdenia, toto som nasiel na digikey fore a je to spravne - vyskusane. Tak keby ste davali USB-C konektor ako napajanie zariadenia treba mat na pamati toto:

The DFP advertises its VBUS current capability by varying the pull-up on its CC pins:

5V 3A capability is advertised by sourcing 330 μA (±8%) into each CC pin (e.g. using 10 kΩ pullup to 5V or 4.7 kΩ pullup to 3.3V)
5V 1.5A capability is advertised by sourcing 180 μA (±8%) into each CC pin (e.g. using 22 kΩ pullup to 5V or 12 kΩ pullup to 3.3V)
“Default USB Power” is advertised by sourcing 80 μA (±20%) into CC (e.g. using 56 kΩ pullup to 5V or 36 kΩ pullup to 3.3V)
Default USB Power means:

If you connect as USB device then the rules of the applicable USB specification must be followed.
If a charger is detected using the D+/D- lines as per the USB Battery Charging 1.2 standard then you may draw up to 1.5 A but the voltage may drop as a result, see that spec for details. This allows for detecting non-Type-C chargers, although Type-C chargers are also still required to support this.
Otherwise, you may draw up 500 mA from VBUS.
To determine the current advertised by the DFP you measure the voltage on the CC pin (i.e. across the 5.1kΩ resistor):

below 0.20V means no source is connected
between 0.20V and 0.66V means you’re limited to Default USB power as described above.
between 0.66V and 1.23V means you’re allowed to draw up to 1.5A
above 1.23V means you’re allowed to draw up to 3A

Cokolvek ine, ako pisu vyzaduje PD chip, ktory pokeca so sourcom, napr. ten Cypress, ktory je standalone bez mCU schopny vyjednat tych 20V 5A alebo oblubeny ST, ktory je uz dlhu dobu vypredany.
6.06.2022 (18:57:26)  # IP X
Peca303 (web) :
Stejně mě udivuje, že přes každý ten mrňavý kontakt dokážou procpat 1,25 A bez toho, aby to celé zčudlo. Při 20 V už by každý přechoďák pěkně jiskřil
6.06.2022 (19:20:07)  # IP X
RayeR (web) :
Jo, dobre vedet. Zatim tu skoro zadne USB-C zarizeni nemam, akorat powerbanku s USB-C nabijecim portem, kterou pripojuju pres ustrizeny USB-C kabel k lab. zdroji pres 2 draty at si bere co chce...
U tech kontaktu, mi prijde ten proud az az i na ten 1 kontakt v microUSB...
6.06.2022 (19:58:11)  # IP X
toman:
Mam tu napr. taku drahsiu celovku od ELWIS, nabijaciu Li-ion s USB-C. Iba preto som ju vlastne kupoval, lebo mobily mam len Cckove, notas detto. Jeden adapter vladne vsetkym, staci 45W SAMSUNG nabijacka za 25€ a neriesim. No a ta mrdka po zapojeni USB-C nerobi nic.. Vyrobca na tie CC piny nedal ani prd, pretoze pocital chybne s tym, ze kazdy pouziva tie "prechodove" USB-A to USB-C kable, kde skutocne funguje. Takze to nieje limitovane len na rozne DIY zariadenia, tusim s tym malo problem aj nejake Rpi.

Inak co sa tyka HW, o tom som ja debil nevedel.. ale pri hladani som nasiel, ze tie PCB samice su aj tzv. nabijacie. Maju len 6 padov do PCB, takze sa to spajkuje aj rucne bez pasty uplne v pohode. Prave tie maju vacsinou aj ten 5A rating. Datove/obrazove nie, tam byva len 3A. Takze zrejme je v tych pinoch rozdiel.
14.06.2022 (09:54:17)  # IP X
ms-boss obalka (web) :
Mám už 2-3 roky čínskej mobil se nestandardním USB-C nabíjením - nabíjí to 10V 6.5A. Konektor furt v pohodě.
14.06.2022 (14:06:49)  # IP X
RayeR (web) :
Twl 65W, to nabiji jak notebook :)
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