Universal USB Charging Solution: Creating a Universal Car Charger for USB Devices From the TPS54240 and TPS2540A

This application report describes how to design an iPad™ or Universal Car Charger for USB devices. The design meets the Battery Charging Specification BC1.2 for DCP and CDP, Chinese Telecommunications Industry Standard YD/T 1591-2009, and is compatible with USB2.0 and 3.0 power switch requirements. The form factor of the design complies to the UL standard 2089 and ANSI/SAE J563 specification and can be easily adapted to meet other form factors.