Interpretation of mobile phone private charging protocol

At present, there are three quick charging schemes ： Low voltage and high current 、 High voltage, low current and dynamic adjustment , The quick charging schemes are different , The derived fast charging protocols are ： qualcomm QC agreement 、 mediatek PE agreement 、OPPO Of VOOC Flash charging 、 Huawei SCP/FCP Flash charging 、VIVO Of FlashCharge Flash charging 、 millet MIChargeTurbo Flash charging 、 samsung AFC Quick charge 、 There was a before the apple Apple 2.4A  Quick charge agreement （ Now we support PD Quick charge ） etc. .

Normal test , Using a decoy , Observe whether the desired wattage can be reached and charge normally , It can be considered that the function has been achieved , test PASS. But if the specification is carefully measured , Special test instruments may be required to cover the test items of the corresponding version of the corresponding protocol . Further more , If you need to obtain the corresponding certification , such as Qualcomm QC3.0 certification, It is necessary to contact the corresponding testing agency for testing , To obtain qualification certification . At present, there is little public information about private agreements , Complete protocol conformance testing Protocol Compliance Test, For example, protocol interaction instructions 、 Digital waveform performance, etc , It will have some impact on the test .

To use the POWER-Z KT001 Take this decoy as an example ：

Step1： Select a charging protocol , If you use Apple2.4A Protocol for charging test .

Step2： If 12W It's the target value , Then the trick succeeds ,PASS.

Other supportable protocols detected can also be tested ：

If you want to analyze waveform by waveform , The agreement needs to be understood carefully , Write test script , This requires deep and deep agreement .