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USB Power supply Pin detail.

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Wolfram

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I want to make a USB charger for Tablet, mp3 player. My design is simple using 7805 for 5V. What to do with D+ and D- pins ?
 

Hello,
These pins are used for data transfers. If u use it only to charge your device, leave without connections.
Hope this helps.:wink:
 

    V

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The data pins are used to identify charging capabilities. If left open, some devices may not charge (they will not recognize the charger as a valid device) or they may charge very slowly.

You can download the specs here:https://www.usb.org/developers/docs/ or do a search for USB charging configurations.
 

I agree as what bking said, if u have any problems with this,
u need to search for a way out for it. (If in doubt, feel free to come back here and ask us so we can guide you:wink:)
 

The data pins are used to identify charging capabilities. If left open, some devices may not charge (they will not recognize the charger as a valid device) or they may charge very slowly.
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I don't think that you can do anything for charging capabilities anouncement without dedicated hardware. In so far, unconnecting D+ and D- is probably the right suggestion.
 

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    FvM

    FvM

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Hi,

If you want to sell your charger in high quantity, then please try to comply with usb standards.

Klaus
 

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