DCP enumerator passthru charge adapter...AKA USB Charge Booster

[Warhawk-AVG]

They call it a charge booster, what it is, it puts the proper charge signal on the data pins on the USB cable (D+ and D-)

USB charge booster

Ever wonder why some devices charge faster on different devices...the data pins in the cord control the devices charging characteristics
Small writeup on dedicated charging ports on USB

This device puts the charge signature on it and as long as the charger itself can output higher current the device charging will pull its maximum rated charge current

I built my own DIY board similar to this...it uses an old thrown away ATX power supply, the 5vdc rail on even an anemic 250WATT PS is well over 20A, in fact mine can push 24A, 14 on the 12VDC rail

Either way...this is the discussion on my "experiment," the above device is a passthru of what I made myself and has a case
http://budgetlightforum.com/node/33038

Either way...with this device...it "can" increase the charge speed of devices that seem to take forever to charge when you plug into a USB port

 

[st_andrew]

I'd like to get this for my ipad. Is there any risk to the battery when using this?

 

[Warhawk-AVG]

No, the charging circuit in the ipad pulls only the current needed to safely charge (the charging device must be able to put out 2A or more), this device only convinces the charging circuit that it is tied into a Dedicated Charging Port rather than a lower current limited Downstream Charging Port (USB 1.1/2.0)

My design uses an old thrown away ATX powersupply, it's 5 vdc rail can supply 24A, all the devices that CAN charge at 5 watts or higher charge at their max rate...AKA fast charge

Their design is a passthru version of what I did, mine needs and external power source, theirs uses whatever is supplied by the USB port you plug it into

 

[Warhawk-AVG]

USB Charge Accelerator - Inline/Passthru DCP Enumerator

Final revision and correction



TOP:

Bottom:

Datasheet for the Ti TPS2514 DCP enumerator IC

BOM:
TPS2513
CAP CER 0.1UF 0805
USB Type A SMD female
USB Type A SMD male

Final change, triple checked, rounded the edges to help with pocket-ability (not so sharp corners)

 

[Warhawk-AVG]

ok, completed it finally!

uggh..after about 5 tries I finally verified all pinouts and connections

For those of you that like tinkering and DIY and want to accelerate your USB charging, this is an inline adapter that not only prevents juice-jacking but ensures your device charges at its maximum rate at whatever output current is available (up to 2A)

 

[Warhawk-AVG]

At this time do not buy these, prototype is smoking the IC's and I am troubleshooting to figure out why

 

[UncleRJ]

I would love to have a device like that if they would work with the mods I have with an internal charger. My E-MECH with twin 18650s takes just over 4 hours to charge. Which I why about half the time I pull the batteries to charge them at 1.0 amp in my charger which takes under 2 hours tops.

 

[Warhawk-AVG]

I would love to have a device like that if they would work with the mods I have with an internal charger. My E-MECH with twin 18650s takes just over 4 hours to charge. Which I why about half the time I pull the batteries to charge them at 1.0 amp in my charger which takes under 2 hours tops.

In, the mean time you can mod a standard USB cable by shorting the data pins, it will charge all devices at up to 1A

I would love to have a device like that if they would work with the mods I have with an internal charger. My E-MECH with twin 18650s takes just over 4 hours to charge. Which I why about half the time I pull the batteries to charge them at 1.0 amp in my charger which takes under 2 hours tops.

In, the mean time you can mod a standard USB cable by shorting the data pins, it will charge all devices at up to 1A

truthfully I could make a very simple design that has The board w/ pins shorted w/ no IC or cap, just in/out USB plugs, the one above is an autoranging one, but not sure why it's smoking the IC's

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