after replacing micro usb port, tablet charges only 450mah

Asked Apr 19 '18 at 13:33

Active Apr 19 '18 at 13:49

Viewed 4,907 times

I changed micro usb port which was broken (it takes out from motherboard) on tablet. On motherboard are 5 contacts and one is damaged (4. - it is for data transfer, ID). I solder +5 VDC contact and Ground, and left 4,3,2 pins for data transfer (not solder them). Now tablet is charging but "only" with 450mA. Why charging chip doesnt increase charging power more than 450mah. I think that 4,3,2 pins are not needed for charging by charger, only for data transfer and smart recognition. Am I right or wrong?

edited Apr 19 '18 at 13:49

asked Apr 19 '18 at 13:33

Infinity001

1

how much is 450mAh in mA? – Tony Stewart EE75 Apr 19 '18 at 13:38
3

I've chosen this as a duplicate because the linked question answers this as well. D+ and D- are usually needed to let the device know what kind of current is available. – Arsenal Apr 19 '18 at 13:40
So if I solder D+ and D- which are ok, will it charges optimaly? I have damaged ID pin (4), will it affect on some way for charging? – Infinity001 Apr 19 '18 at 13:45
@Infinity001 I don't think the ID pin is important for charging. It is unconnected in the linked question as well. – Arsenal Apr 19 '18 at 14:09
You'd only need the ID pin if you want to function as a USB host using one of those adapter cables. – Chris Stratton Apr 19 '18 at 14:40
You are wrong that D+/D- are not needed. Search SE EE for "charger signature" topics. – Ale..chenski Apr 19 '18 at 15:45
Thx on answers to all, will solder D+/D- and try to solder ID also – Infinity001 Apr 19 '18 at 20:17

after replacing micro usb port, tablet charges only 450mah

0 Answers0