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Repair information, troubleshooting tips, and guides for the sixth iteration of Apple iPhone, announced on September 12, 2012. Model: A1428, A1429

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iPhone 5 does not charge/charges poorly while using

hi, i got an iPhone 5 with a little problem. if i plug it in the charger, it charges normallyi. f i leave the phone in standby, it takes about 2 hours to fully charge. normal

but if i use it while charging, sometimes it charger 2 to 5 % and then stops until you let it sit for 3 minutes and the same thing happens. it just doesn’t charge when you use it.

the battery has already been replaced. today i used another new battery and charging port and the same thing happens. here is a picture of the phone after i tested the new battery and charging port.

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Block Image

as you can see, absolutely clean on the interior. no water damage.

i have heard things about a 9 pin switch MOSFET and the NXP 1608A1 host controller IC. being faulty. but i can run the entire battery flat and still charge it no problem. nor does it auto turn on when connecting the battery or drain/heat up unusually. so i doubt it is faulty. but i dont know.

does anybody have had a similar issue, and does anyone know a fix for this?

thanks in advance

Answered! View the answer I have this problem too

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Tristar Charging IC (1608A1) does not appear to be at fault as you can charge the iPhone while the battery goes flat.

Does the charging cable go into the charging port socket fully or is there a gap?

If there's a gap you'll need something like a toothpick to carefully clean out the debris / gunk stuck inside the port. Careful when doing so as there are 8 pins that can get damaged if you push against them.

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hi, thanks but the connector is absolutely clean. i cleaned it with isopropyl alcohol. its the cleanest connector this phone has ever seen. it goes all the way in

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Okay, so it is something wrong with the charging circuit, most people would initially suspect the charging IC but it's probably components on the charging circuit being at fault instead of the Tristar chip.

Had a similar issue like this on a iPhone 6S before (kind of the opposite) where it would only charge if the phone was not locked / sleeping. Never managed to fix it even after replacing Tristar and some other components on the Tristar circuit.

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