Author Topic: USB boost circuit won’t charge apple devices  (Read 645 times)

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Offline EvolveReduxTopic starter

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USB boost circuit won’t charge apple devices
« on: September 30, 2019, 12:17:56 pm »
So I purchased a pre-built USB boost circuit from Jaycar Electronics, and soldered a 3 volt lithium battery onto the terminals. Then when I went to plug in the iPad it didn’t recognise it as a charger, instead as a USB accessory. I waited a couple of hours to see if it did charge, it still didn’t. I tried plugging into something other than the iPad and was successful charging other devices that weren’t apple devices. I’m not exactly sure what is wrong with it, but if you could help it would be great.
« Last Edit: September 30, 2019, 12:20:10 pm by EvolveRedux »
 

Offline solderfreelead

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Re: USB boost circuit won’t charge apple devices
« Reply #1 on: September 30, 2019, 12:56:31 pm »
Have you tried using a genuine Apple USB charging cable (or a compatible one)?
 

Offline mikerj

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Re: USB boost circuit won’t charge apple devices
« Reply #2 on: September 30, 2019, 01:34:41 pm »
You need to tie the D+ and D- data lines to the correct voltages.  More details in this article.
 
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Offline mariush

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Re: USB boost circuit won’t charge apple devices
« Reply #3 on: September 30, 2019, 01:37:13 pm »
Or use a proper IC that can set the right signals on the data pins of the USB.
See my post here: https://www.eevblog.com/forum/projects/charging-multiple-devices-with-a-simple-5v-power-supply/msg2714808/#msg2714808
 
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Offline EvolveReduxTopic starter

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Re: USB boost circuit won’t charge apple devices
« Reply #4 on: September 30, 2019, 09:58:16 pm »
Yeah I’ve been using a apple offical cable.
 


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