What is fast charge?Phones fast charging quick explanation

Monday, June 12, 2017

  Support for fast charging technology for mobile devices more and more, if a cell phone does not support fast charging technology has been embarrassed to say that they belong to this era of dreams. Apple, Samsung, Qualcomm, MTK, Intel and other major brands have various brands of fast charging, how should the difference between them? How about compatibility?

  What is fast charging technology?

  For fast charging technology is not a precise definition, broadly speaking, the brand's charging technology is rapid charging technologies, including Qualcomm's Quick Charge 1.0 ~ 3.0 (QC), MTK's MTP Pump Express, USB's Power Delivery, etc. . From analysis of the technical features, they have in common is larger than the output power of 5W market, the most common USB charger (5V / 1A).

  Why fast charging technology?

  The following is a charging rate of the data evaluation iPhone 6s. Can be seen using a quick charging technology Samsung Galaxy S6 edge, New Moto X, Asus Zenfone 2 has a very fast charging speed.

  Which were measured several Samsung Galaxy S6 edge charger is a typical representative, it uses standard supports fast charger charging the test requires only 37 minutes to complete the test, the use of 5V / 2.1A charger time extended to 49 minutes, using Apple 5V / 1A charger extended to 107 minutes. Supports fast charging standard charger, charger than 5V / 1A charging time is reduced to one third.

 Since most of the current mobile phone using the built-in non-removable battery design, with fast charging technology, the phone can greatly shorten the charging time, significantly enhance the user experience, you can not do without using it.

  The current charging standard total is divided into the following categories:

  1. USB standard;
  2. Apple's standards;
  3. Qualcomm standards;
  4. MTK standard;                       

  1.USB standard

  USB standard is divided into:

  USB 1.0、2.0:5V/500mA;
  USB 3.0:5V/900mA;
  USB Battery Charge 1.2(BC1.2):5V/500mA、5V/1.5A;
  USB Type-C:5V/500mA、5V/900mA、5V/1.5A、5V/3A;
  USB Power Delivery 2 v1.1:5V/2A、12V/1.5A、12V/3A、12V/5A、20V/3A、20V/5A;

  2.Apple standard

  Apple iOS device interface specification based on USB, the interface is relatively simple power supply, into 5V / 1A, 5V / 2.1A two kinds are different by D + and D- of the charger configured to identify the identification resistor.

  5V / 1A: iPhone, iPod Touch use charging specifications 5V / 1A, the use of charge;
  5V / 2.1A, provided to iPad, iPhone Plus charged with use;

  Apple iPhone's relatively small capacity batteries, charging technology is relatively simple, needs no temporary problem, iPad large-capacity battery, 5V / 2.1A charging specifications appear earlier than.

 3.Qualcomm standard

  Qualcomm on September 15 this year released a Quick Charge 3.0 (QC3.0), compared to QC2.0 not universal technology to enhance the charging rate of 27%, reduce power consumption by 45%. Fast charging using high voltage is improved way to reduce line losses.A total of three generations of the Qualcomm fast charge current technology, namely:

  Qualcomm QC1.0: Output Specification 5V / 2A, basically Snapdragon platform 600;

  Qualcomm QC2.0: Output Specification 5V / 9V / 12V third gear, the maximum current of 3A, which is currently the most widely used of a fast charging technology; support the Snapdragon platform include 200/400/410/615/800/801 / 805/810, while also licensed to other manufacturers use, such as Samsung's quick charging technology, Intel's BoostMaster fast charging technology in fact, is a Qualcomm QC2.0 ;

  Qualcomm QC3.0: use the algorithm is called the optimum voltage intelligent negotiation (Intelligent Negotiation for Optimum Voltage, INOV ) , support for 3.6V to 20V operating voltage dynamically adjusted to 200mV stepping. Compatible platform includes a Qualcomm snapdragon 820,620,618,617 and 430, and downwardly compatible device QC2.0 QC1.0 and can be used in a USB Type-A interfaces, USB micro interface and a USB Type-C Interface on.

  4.MTK's Pump Express fast charge technology

  The MTK MTP Pump Express fast charge technology is divided into two types, one with and one without Plus Plus, can support the belt Plus 9V / 12V, from a specification point of view, Common Pump Express support the former, the charging current does not exceed 2A , while support for Pump Express Plus products can reach 12V / 3A, this type of product currently on the market is relatively small, mobile power and Meizu Meizu phone support mCharge fall into this category of products.

  In addition to these four kinds of widely used rapid charging technology, in addition to the flash technology called VOOC of charge, from OPPO,Meizu Super mcharge fast charging techlonogy which released on  MWC 2017 and Huawei SuperCharge and so on.

  Described above is the presence of fast charging technology available in the market, each are based on the USB interface, but there are differences on compatibility, use USB Type-C interface to a new class of mobile phones almost have to use the original charger to be fast charging, due to the factors interfaces, third-party adapter products rarely. Qualcomm QC technical phone support Qualcomm QC must use technology to achieve fast charger can charge. MTK of PE-backed products are relatively small, only a small amount of MTK and Lenovo Meizu models support, it must be used with its own charger or mobile power can be achieved. For Apple iPhone users, with iPhone Plus to fast charging, you must use the iPad charger 5V / 2.1A of the third-party high-pass QC or mobile power MTK PE is not necessarily the perfect support for fast charging of iPhone . Overall, the first wife of the charger or use it more reliable.

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