CCG3 Power Bank 2-Cell Battery Cell Design - KBA216643

Version: **

 

Question:

How can I support a 2-cell battery power bank design?

 

Answer:

Power architecture of the existing 1-cell needs to be changed to support 2-cell battery power bank. Discharge path will require a Buck-Boost to support a max 8.2-V battery voltage input and source VBUS between 5 V and 12 V on Type-C and Type-A ports.

 

Charge path will require 2-cell battery charger Buck-Boost to support VBUS in range of 5 V to 12 V.

 

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Figure 1: 2-Cell Power Bank Block Diagram

 

Existing 1-cell design supports 5 V@3 A on the Type-C port to charge the battery for achieving higher efficiency and better thermals.

 

CCG3 firmware can be modified to support complete VBUS range (5 V– 20V) for charge and discharge path.