To begin the design process, the designer must know the following:
- The battery voltage
- The short-circuit cable length
- The maximum continuous output current for the charging port. The minimum current-limit setting of TPS254900A-Q1 device must be higher than this current.
- The maximum output current of the upstream dc-dc converter. The maximum current-limit setting of TPS254900A-Q1 device must be lower than this current.
- For cable compensation, the total resistance including power switch rDS(on), cable resistance, and connector contact resistance must be specified.