Huawei 40w charger is a chip that integrates multiple fast Charge protocols for USB output ports, including QC3.0\/QC2.0(Quick Charge) ClassA\/ClassB(36W),FCP, AFC,Apple 2.4A, and QC2.0. BC1.2 and Samsung 2.0A.
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HL6601 supports automatic detection of device type and charging protocol switching, and automatically responds to fast charging protocol requests; HL6601 controls the output voltage by modulating the Source\/Sink current of FB.
Huawei's 40W fast charge protocol is a private protocol that only supports Huawei's SuperCharge charging protocol.