Power of USB Power Delivery

February 21, 2019 at 8:00 AM

 

In this blog, we’ve talked a lot about USB. From USB 3.1 to USB 3.2, and even vibration-proof USB, USB is always reinventing itself, so it’s no wonder that it remains a powerfully popular interface. Now, USB is taking another step in its progression with USB power delivery, a fast charging technology with significantly higher power levels than standard charging. Here, we’ll take a look at the power of USB power delivery.

 

In the beginning, USB was merely a data interface that was able to provide a limited supply of power. Today, USB has evolved into a main power provider with a data interface. Thus, many things now use USB ports including cars, aircraft, laptops and wall sockets to charge or power devices and transfer data easily. In order to build on these existing USB functions, USB power delivery (USB-PD) has been developed to allow for maximum functionality of USB by delivering data and increased flexible power over a single cable.

 

USB-PD increases power levels from current standards and boosts them up to 100W. This allows for larger, USB-PD-enabled devices, such as tablets and laptops, to be charged over a USB-C cable without the use of bulky power cables. USB-C cables were designed to be able to handle the increased wattage of USB-PD without overheating or being damaged. USB-PD also enables the freedom of power direction that is not fixed, allowing the host or peripheral device to provide power. With USB-PD, enabled devices are capable of power management that is optimized across multiple peripherals, allowing each device to use only the power it needs. Additional power can be given as it is required for a specific application. This system also provides intelligent and flexible power management through hub communication with the PC. Plus, low-power devices, such as headsets, can negotiate to receive only the power they need. USB-PD specifications have been added to both USB 2.0 and 3.0 adopter agreements.

 

With the introduction of USB-PD, USB continues to prove itself an indispensable interface relevant in today’s continually changing world of technology.

 

USB 3.1 Gen 1 vs. Gen 2

August 9, 2018 at 8:00 AM

 

Not sure of the difference between USB 3.1 Gen 1 (aka SuperSpeed USB) and USB 3.1. Gen 2 (aka SuperSpeed USB 10 Gbps or SuperSpeed+)? Don’t worry, you’re not alone. USB has rebranded and restructured how it differentiates between the two, leaving many scratching their heads as to which is which. Have no fear though, we’ve got it all figured out and are here to clear it up for you.

 

If you were impressed by the super speeds brought to you courtesy of USB 3.1, then you’re going to be over the moon for USB 3.1 Gen 2. This iteration of USB technology bolsters speeds and delivers additional benefits sure to please all users. As its name suggests, SuperSpeed+ USB increases the data transfer rate from 5 Gbps to 10 Gbps, making it twice as fast as USB 3.1 Gen 1 and on par with first generation Thunderbolt technology. USB 3.1 Gen 2 also uses more efficient data encoding, which not only increases throughput, but also improves I/O power efficiency.

 

Though the maximum cable length is shortened from 5 meters to 1 meter, USB 3.1 Gen 2 maintains the capability of data plus power over one cable and it can support multiple cameras and the USB3 Vision standard. Plus, USB 3.1 Gen 2 increases the power delivery level from 4.5 Watts to an astounding 100 Watts. This standard will also support USB Type-C, USB DisplayPort over Type-C and USB Power Delivery.

 

USB 3.1 Gen 2 is fully backward compatible with existing USB 3.0 software and devices, 5 Gbps hubs and devices as well as USB 2.0 products. In case there’s still some lingering confusion, here’s a handy chart to help compare these two side-by-side.

  

 

USB 3.1 Gen 1

USB 3.1 Gen 2

Data Rate

5 Gbps

10 Gbps

Power Delivery

4.5 W

100 W

Max Cable Length

5 m

1 m

Multiple Cameras

P

P

USB3 Vision

P

P

Data + Power

P

P

 

 

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