This reference design is a universal input, 71.4V, 7A constant current (CC), constant voltage (CV) charger for e-bike applications. The reference design achieves 92.93% end-to-end peak efficiency with a 115Vac input, and 94.50% end-to-end peak efficiency with a 230Vac input. This design includes fan control and charging status indication based on output current. This reference design uses the UCC28180, UCC256603, UCC28910, and TL103W devices.