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Introduction To QC 2.0

Introduction To QC 2.0

To understand the QC 2.0, we must first understand Qualcomm. Qualcomm focus on mobile phone chips, in the current market, the mobile phone chip is mainly Qualcomm and MediaTek (except APPLE). The QC 2.0 is a charge on the agreement, which is developed by Qualcomm in 2014, a specification.

QC 2.0 is divided into two categories: class A (5V, 9V, 12V) and class B (5V, 9V, 12V, 20V). QC 2.0 charger (wall charger, car charger) is the use of D +, D- voltage changes to control the output voltage of the charger, thereby increasing the mobile phone charging voltage, to shorten the purpose of mobile phone charging time.

How much does the QC 2.0 charge boost? In fact, very direct: 5V as a benchmark, 9V about 1.8 times, 12V about 2.4 times. Qualcomm laboratory results: a flat panel, the original needs 7 hours full, use the QC 2.0 charger charging, the charging time is shortened to 3 hours. The effect of the QC 2.0 charger on the charging speed is very obvious.

It is noteworthy that, not all mobile phones are QC 2.0, only the use of Qualcomm Snapdragon 800 or more mobile phones or tablets have QC 2.0 agreement. However, all mobile phones can be used QC 2.0 charger. 99% because the phone is 5V output, and QC 2.0 charger default output is 5V. However, there is no use of Qualcomm Snapdragon 800 chips or more mobile phones or tablet, even if the use of QC 2.0 charger will not have the effect of fast charging, only 5V voltage normal charge.

Key note, the signal is always a mobile phone and tablet, the charger itself is no control, everything is mobile phones and tablet-oriented. Only phones with a QC 2.0 protocol or a tablet can signal, and the charger will provide high voltage charging (this is also to protect the phone). Therefore, the "customer measured out of the current is not big enough," such a problem, not the product quality. As long as the customer test QC 2.0 charger charging time will know the quality of the charger.

On the basis of QC 2.0, QC 3.0 was born. The pace of the times straight ahead!

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