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Low-voltage USB fast charger VS high-voltage USB fast charger

128 views Yuda Electronic (HK) Technology Co.,Limited. 2018-11-22

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Low-voltage USB fast charger VS high-voltage USB fast charger

 

The quality of today’s life is getting higher and higher, and the dependence and demand for mobile phones are getting higher and higher, so major manufacturers are constantly upgrading their own technologies and services. Of course, the battery life and charging speed become very important.

 

Fast charging is divided into Qualcomm QC fast charging and PD fast charging. Currently PD fast charging is applied to PCs and Apple’s latest mobile devices. Of course, the fast charging technology of each manufacturer is roughly divided into several types, one is Qualcomm’s high-voltage fast charge, the other is low-voltage fast charge, and the other is Meizu mCharge high-voltage fast charge, of course, Huawei’s SuperCharge is also low-voltage fast charge.

 

Low-voltage USB fast charger VS high-voltage USB fast charger

 

Most people will feel that the phone will be hotter than usual when charging with the fast charge USB charger, while OPPO VOOC fast charge 5V/4A and Huawei SuperCharge fast charge technology adopt 4.5V/5A low voltage and high current fast charge technology. It can greatly reduce the heat generated during charging, and the charging chip also uses thermal conductive glue, which can speed up the heat dissipation, reduce the temperature of components, and effectively improve the safety when using fast charging. Of course, the charging head will be hot at work. 

 

The high-voltage fast charge output power is 5V/3A, 9V/3A, 11V/2.4A, 12V/2.25A, and the maximum current does not exceed 3A. There will be obvious heat when the mobile phone is charged.

 

Several technologies have their own characteristics. The high-voltage fast-charge USB charger has lower requirements on the wire and good compatibility, while the low-voltage and high-current fast charge requires the manufacturer to use a better wire in addition to the agreement. Huawei’s mobile phone’s earlier fast charging technology is a high-voltage fast-charging FCP, and then launched a low-voltage and high-current SCP fast charging. Therefore, the requirements of the low-voltage and high-current wires are very strict, the cost of the wires is relatively high, and the wires of all the low-voltage and high-current solutions are relatively thick. High voltages are less demanding on wires and save costs.

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