ðëåï öåã÷ æä äçéáåø äëôåì ììåç àí àáì ëï îöàúé àú îä ùçéôùúé .
http://www.androidauthority.com/wp-c...quirements.jpg
ùéí ìá ùìèòéðä îäéøä éù ìùéí ðâã ùì 10 ÷éìå àåí ùæä áòöí 15 ååàè àí 18 ååàè àå 32 áèòéðä îäéøä ùùí îòìéí îúç.
åìèòéðä ñèðãøèéú ùîéí 22 ÷éìå àåí ùîâáéìä ì1.5 àîôø
åìîëùéøéí éùðéí éåúø ùòåáãéí ìôé ú÷ï
Battery charging 1.2
àå usb âðøé ùîéí 56 ÷éìå àåí.
ìãòúé äîöìîä äéà òì ú÷ï battery charging 1.2
åòì ëï öøéê ëáì 56 ÷éìå àåí àí ìçáø ëáì òí äúðâãåú ðîåëä éåúø àæ äîöìîä ìà îëéìä ðâã ôðéîé ëé äú÷ï ìôðé äîèòðéí äîäéøéí ìà ãøù æàåú , åæä îúëåï ìîòâì ùøåó.
For Type-C to Type-C connections, using these higher current modes is fine, as the ports are all built around the same standard, and is a convenient way to charge devices up quickly. However, a lot of the recent issues have been about legacy adapter cables, the ones that will take your USB-Type-C socket on your new phone or laptop and connect up to an older Type-A PC port or charger.
We’re not worried about speeds here, but the thing to look out for is power transfer between devices. Because the USB Type-C standard specifically defines higher rates of charging that aren’t catered for in older Type-B or other connectors, cable manufacturers are supposed to use the CC connection and Rp resistor to ensure that devices don’t attempt to draw too much current from older chargers or devices that can’t support it.
The specification table below shows what values can be used to set a specific Type-C charging mode and underneath, in the small print, we can see that a 56kΩ resistor should be used with all legacy cable connections. This is to limit the amount of current transferred to Default USB power or the USB Battery Charging standard (if the cable supports fast charging) when connecting up to older USB type devices.
What has happened with the case of OnePlus and the other out of spec USB adapter cables is that they are not setting this resistor properly. A number of companies are opting for 10kΩ values, perhaps mistakenly thinking that they are meeting the maximum capabilities of the specification when in fact they are breaking it. This could mean that a USB Type-C device attempts to draw 3A from an older charger than can only handle 1A or less, a recipe for destroying your charger or port.
Another part of the issue is that cables also want to support fast charging technologies for smartphones and other products. This often falls under the USB Battery Charging standard, which supports higher currents than the default mode. Manufacturers may be mistaken into thinking that the correct way to cater for these currents is to allow for the maximum of 3A over Type-C. However, communication for this standard is managed over separate USB D+ and D- data lines, rather than the CC line, and is usually handled by an on-device power management circuit. The 56kΩ resistor is still required, as we know that the Type-C modes overwrite the USB BC standard.
http://www.androidauthority.com/usb-...lained-656552/
Sent from mTalk using windows 10 mobile
öéèåè ääåãòä áúâåáä