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5V USB Powerbank

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ARULARASU.R

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I have designed a powerbank with 5v 1A but when I connect with mobile its showing charging but its not getting charged latter I came to know that D+ and D- pins from usb should connected in some way to make mobile charge but Ihad tried a lot but dont have a idea to connect D+ and D- pins so help me to fix it
 

Ian Rogers

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Wiki said:
The charging device identifies the type of port through non-data signalling on the D+ and D− signals immediately after attach. A DCP (Dedicated Charging Port ) simply has to place a resistance not exceeding 200 Ω across the D+ and D− signals.
 

dr pepper

Well-Known Member
Most Helpful Member
Some phone chargers have a resistor array across the data pins, 4 or 5 resistors, the phone must measure the voltage and then decide what to do.
 
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