The principle of fast charging technology

- Jan 08, 2018 -

The principle of fast charging technology


The D+ of the USB port is supplied with the different voltage of the D- to apply the corresponding output voltage to the charger to charge the cell phone. QC2.0 D+ and voltage combination is not simple D- can keep the charger output required, but there is some agreement on the inside, need to send handshake signals, such as the 1.5s handshake to output voltage, the next step, otherwise, according to figure -4 D+ and D- level set is output the voltage will not change the charger, which is in order to better protect the non QC2.0 technology of mobile phone, not because of the false triggering mechanism and the mobile phone charger burned booster


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