What Risks charge via USB Wall Charger Smartphone?
Monday, April 27, 2015
Just not all connectors, charger and USB cable the same tablets. There is a greater capability. There are times when a single USB port on your laptop power supply is stronger than other ports.
In some desktop PC, you can still charge the smartphone via its USB port even though the PC is turned off. How could you?
This is her explanation.
four Specifications
Currently there are 4 USB specs: USB 1.0, 2.0, 3.0, and 3.1. Plus there is an additional future new connector: USB-C. The difference has been explained in the previous article.
At any USB network, there are acting as hosts and devices. PC usually be the host, and a smartphone, tablet or camera into the device. Power always flows from the host to the device, but the data can go both ways.
A USB socket has four pins, and a USB cable has 4 wires. Pin-pin on the inside of the carry data (D + and D-), and pin-out pin provides 5-volt power supply. Based on the present specification, the USB port is divided into three: standard downstream port, charging port downstream, and a dedicated charging port. The first two can be found in the computer, while the third one is present at the wall outlet (wall charger).
On spec USB 1.0 and 2.0 specs, standard downstream ports capable of carrying up to 500mA (0.5a); in USB 3.0, the figure rises to 900mA (0,9A). Charging port and a dedicated charging downstream supply up to 1500mA (1.5A). While USB 3.1 mendongkraknya output to 10Gbps on so-called SuperSpeed + mode, so almost equivalent to the first generation of Thunderbolt. It also supports a data pull 1.5A and 3A via the 5V bus.
USB connector-C is not so. First, he is universal. It means you can plug it sebarangan and it will still work. The USB does not work like that. Furthermore the USB-C theoretically has 2x USB 3.0 output and bias clicking more power output. The new MacBook, Apple provides a USB 3.1. Similarly, Google with its Chromebook Pixel. But there is also a long USB port can support 3.1 standard.
Spec USB port also allows the presence of "sleep-and-charge". That is, the USB port on the computer is turned off remains active. An example is your desktop PC. Although already you turn off, there is always a power flowing through the motherboard. That's why you'll see light lit optical mouse. However, some laptop also has the ability to sleep-and-charge.
USB Device Can Explode?
There is an interesting question posed a friend. He has a number of USB devices. iPad, iPod, (some) smartphones, notebooks, tablets, and digital cameras. Each device includes a USB charger to recharge the device battery. But its capacity is different. Charger Apple iPad, for example, provide 2,1A at 5V; Amazon Kindle Fire clicking output 1.8; while car charger can either output ranging from 1A to 2,1A.
So there is great variation between normal USB port with 500mA rating and a special port to charge that could reach 3000mA. The question is, if a smartphone that comes with a 900mA charger driven into a powerful iPad charger 2100mA, whether the smartphone will explode?
The short answer is no! You can plug any USB device into any USB cable and nothing is going to explode. Even using a larger charger should speed up the process of charging the battery.
Longer answer, the age you also have an important role in determining how quickly he could be refilled, and whether it can be filled with plugs wall (wall charger). In 2007, the USB Implementers Forum released Battery Charging Specification, which standardizes a faster way to charge USB devices, either by pumping more amperes through a PC USB port, or by using a wall charger. Shortly thereafter, USB devices with such specifications also appear.
If your USB device is modern - usually does so if you have a smartphone, tablet, or a camera - you should be able to plug it into a USB port with high amperage and cut the charging time. But if perangkatmu old, perhaps he could not work with a USB port that applies Battery Charging Specification. He may just want to work with USB 1.0 or 2.0 port of the original old (500mA). In some cases, only the old USB devices can be charged from a computer using certain driver (usually proprietary).
Hmm, there are some other things you need to pay attention. Despite your PC has two types of USB ports - standard charging downstream or downstream - the OEM is not always labeled as such. As a result, you may have to charge the device from one port on your laptop, but not from the other ports. This characteristic of the old computer, because when there is no reason why dowstream standard port should be used, when there is the charging port with high amperage. A number of vendors are now labeled small flash icon at the top of the charging port on the laptop. In some cases, these ports can still be used even when the laptop is closed.
With a similar way, some external device - usually a hard drive and an optical drive - demanded more power can be supplied from the USB port. That's why the hard drive and optical drive cable-Y include a two-port USB or AC adapter power.
And if the USB connector-C became popular, you will be pleased. Needless to mistakenly insert the USB head position again deh.
