4 USB Buck module, suitable for various types of 5V appliances such as power adapters, battery batteries, and car power supplies for stepping down to mobile phones. Support wholesale custom.
This shop has another acrylic shell version.
 
The main parameters of the module:

    Input voltage: DC 9V-32V
    Output voltage: 5.1V
    Output current: 3A*2. Two circuits, each with two USB ports, each supporting a maximum of 3A; the module's total maximum current can reach 6A.
    Module size:
    Bare board size: 55*46*20mm (length*width*height)
    Bare net weight: about 28g
    Fixed hole spacing: 47*38mm
    Input connection mode: 5.5*2.1 female seat, with positive and negative inside. With 5.5*2.1cm specifications of the male head can be. Compatible with 5.5*2.5cm, but relatively tight. Pay attention to the input without reverse polarity protection, positive and negative polarity can not be reversed.

The main protection function of the module:

    No-load current <2mA
    Output over-current protection (over 3.5A protection)
    Input over-voltage protection (more than 32V does not start, limit voltage 45V)
    Input undervoltage protection (about 8V)
    Output short circuit protection (short circuit off output)
    Output overvoltage protection (if the chip is out of control, the output voltage is too high, it will be limited to 6V)
    Reverse input protection
    Input 5A fuse

Support mobile phone charging protocol:

    Divider1/Divider2/Divider3 charging protocol (for Apple)
    D+/D- set 1.2V mode (Samsung only)
    BC1.2 DCP and CTIS YD/T 1591-2009 Charging Protocol
    Special reminder: QC Qualcomm fast charge is not supported, OPPO/VIVO VOOC fast charge is not supported, and SCP/FCP Huawei fast charge is not supported.

[Introduction of charging identification IC used in this module]

    Introduction: This module uses a FM5888 dual identification IC, which is USB charging protocol port control IC, can automatically identify the type of charging device, and through the corresponding USB charging protocol to shake hands with the device, so that it obtains the maximum charging current in the protection charge Device saves charging time.
    The output current is determined by the load (mobile phone and other electrical equipment), and it is generally adaptive. To achieve the maximum current, it needs the support of the mobile phone or the electrical device itself.At present, there are many kinds of fast charging protocols on the market, which require your own mobile phone to support it. If you do not support it, you can use it for normal charging. About 0.5A or so.
    The charge identification IC is compatible with Apple's full range of products and can guarantee maximum charging speed. This product does not support Qualcomm QC protocol. If your phone uses the QC protocol to use this product can not achieve the fastest charging speed, but it can also be compatible with charging.