I am using MK20DX128VFM5 and trying to build up a USB CDC host board to drive the enumeration and charging of a CDC device. My custom board is receiving +12V DC from power source and I expect the charging current to be around 400mA.
Question is, how can I make VBus of K20 to output current above for charging purpose? I see from user manual there is a USB Voltage Regulator inside k20, but its output is only 120mA.
Is there a reference design available for such case?