The CYAC40S12G1 converter supports a maximum output power of 40 (10V/4A,SCP high-voltage class B protocol) and is backward compatible with multiple charging fin such as 22.5 W (10V/2.25 A, SCP high-voltage class B protocol),20W (5V/4A, SCP low-voltage class B protocol), 18 W (9V/2 A, SCP class A and QC2.0 protocols), and 10 W (5 V/2 A common charging). The converter can be used for fast charging or common charging of most terminal devices.