DIY USB-C Portable Power Bank

usb-c power bank

If you want to build your own portable battery banks for  notebook, phone or a Type-C/PD based device, here are amazing reference designs you should consider 

45W USB Type-C/PD Power bank

For many, carrying multiple devices is normal if not a necessary part of daily life. The average user’s dependency on these gadgets continues to increase while the overall battery life is decreasing. Many users have no choice but to carry an alternate portable source of power to help recharge gadgets while on the move. This reference design offers a power bank solution that can provide 45 W of power to charge a notebook while away from traditional power sources.

This design can be used to charge a notebook, cell-phone or a Type-C/PD based device. The key aspect of this design is to reduce the bill of materials (BOM) cost while maintaining the overall functionality. The design implements unique considerations for reducing quiescent current and covers all the required aspects to guide users through the part selection and trade-off considerations.


  • Supports 5 V at 3 A, 9 V at 3 A, 14.8 V at 2 A, 15 V at 3A, and 20V at 2.25A for Power Data Objects (PDOs)
  • Supports up to 45 W of Power to Charge Portable Devices
  • Automatically Charges After Connecting to USB PD Source

Click here for the reference design

18W USB Type-C Power Bank

Cypress has developed the EZ-PDTM CCG2 Power Bank reference design that has a portable external battery which stores charge when connected to a charger and later delivers charge to an attached device. This solution has a USB Type-C receptacle which acts as a power source or sink (Dual Role Port). The two major components on the board are Cypress’s EZ-PD CCG2 (CYPD2134-24LQXIT) controller and SouthChip’s SC8802 Buck-Boost charger. The CCG2 device handles USB Type-C interface and Power Delivery (PD) 2.0. The buck-boost conversion, battery charging, Over Current Protection (OCP), Over Voltage Protection (OVP) and Short Circuit Protection (SCP) functions are handled by Southchip’s SC8802 DC-DC Buck-Boost charger. The board hardware design files (schematic, layout etc) and firmware are available to speed development.

Design and Development of a Sound Impact Sensor

Click here for the reference design.




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