FS: uCharge (Rev. A) 2A USB 2.0 Charging Module and Communication Port - Page 1
Forum section: electronics / general

author: bloguetronica
author_rank: Frequent Contributor
timestamp: November 13, 2017, 02:01:22 pm
content: Hi,I have two modules for sale on eBay:http://www.ebay.com/itm/152733838509These modules provide enough current (2A, with headroom) to charge a cellphone while maintaing USB communication. They can charge standalone, without being connected to a PC. The modules are intelligent, not only detecting if they are connected to a host PC or not, but also they support several charging protocols, detecting automatically which protocol the device to be charged uses.They are useful, not only to charge devices, but also for testing purposes. These modules are pretty much transparent in respect to the USB communication, supporting both USB 1.1 and USB 2.0. The boards used are 4-layer boards from OSH Park, with ENIG finishing. Both modules were tested, including with the maximum load. Communication was also tested and the voltages on D+ and D- were checked to confirm the support of several charging protocols.Here are some specs:- Features auto switching between DCP (dedicated charging port) and CDP (charging downstream port) depending on whether it is connected to a computer or not;- Up to 2A of output current, guaranteed by design, in any condition;- Operation guaranteed between 7V and 16V supply voltage;- Over-current, over-voltage, under-voltage and reversed polarity protection, plus added protection against spikes on the power supply;- Uses Texas Instruments TPS62133 DC-DC converter and TPS2544 for power management;- Supports a variety of charging standards, including BC 1.2 e YD/T 1591-2009;- Charges Samsung or iPhone smartphones and tablets.Warning:- Do not touch the DC/DC converter or the TPS2544 while this module is powered by an unearthed switched-mode power supply, as the leakage current going through you will be enough to disturb these circuits (but apparently without damaging them). Touching the module while it is powered by a linear power supply (earthed or not), or an earthed switched-mode power supply is OK, since the leakage current is well reduced.The price for EEVblog forum users is $52 for each module and $8 for the shipping. This already includes PayPal fees. Please contact me via PM if you're interested.Kind regards, Samuel Lourenço

author: RoadRunner
author_rank: Frequent Contributor
timestamp: November 13, 2017, 03:05:34 pm
content: Do you hand assemble these boards using stencil or something or do you get them through pick-n-place ?

author: bloguetronica
author_rank: Frequent Contributor
timestamp: November 13, 2017, 03:37:07 pm
content: Hi RoadRunner,I do assemble them using a stencil to spread the solder paste and then place the components by hand. The boards were inspected and have no shorts, bad joints or misplaced components. I can provide some more detailed photos, if you wish.Kind regards, Samuel Lourenço

author: bloguetronica
author_rank: Frequent Contributor
timestamp: November 13, 2017, 09:19:38 pm
content: Hi,Attached are some detailed photos of one of the boards.Kind regards, Samuel Lourenço

author: bloguetronica
author_rank: Frequent Contributor
timestamp: November 13, 2017, 09:21:35 pm
content: Hi,Just to add to the previous message, the other board is pretty much the same. See the photos attached.Kind regards, Samuel Lourenço