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.

 

Good Vibrations: Vibration-Proof USB Connectors

April 21, 2016 at 8:00 AM

 

Universal Serial Bus (USB) is one of the most successful and widely used connectivity technologies. It can be found on televisions, computers, printers, keyboards and cell phones.  Not only does USB allow devices to connect to one another, it can also be used to power devices.

 

As popular as USB is, there is one fundamental problem that plagues the technology: sensitivity to vibration. Traditional USB connectors rely on a friction-fit, meaning that they don’t latch or lock when they are mated. A friction-fit can result in a USB connector to unexpectedly pop-out and dislodge from its mated port when jostling, vibration, or cable pull occur.  This is especially problematic in high-vibration, military, industrial and medical applications.

 

Fortunately, there are several vibration-proof USB connector options to improve connection performance and put your USB cable on lockdown.

 

Latching USB Cables

 

Latching USB cables feature latching plugs on the side of the USB connector. This provides a secure connection with lock-down mating retention.  Latches are located on USB 2.0 Type-A connectors.

 

USB coil cables also utilize latching connectors to battle vibration and cable pull. They have latches that lock into the channels on each side of a USB jack and the cord retracts and expands from 2.5 feet to 12.5 feet

 

Thumbscrews

 

Thumbscrews are another great way to protect a USB connection from vibration. They ensure a secure connection and prevent the USB connectors from disconnecting. Locking thumbscrews can be used with machine vision applications or in any application where vibration is an issue.

 

High-Retention Connectors


High-retention connectors are an effective way to combat the effects of vibration on your USB connection. With a mating force of 40N max and an un-mating force of 15N min, they have 50% higher retention than standard USB connectors.  USB adapters with high-retention connectors are easy to use and feature screw mount hardware for a secure connection every time.

 

For all the ease of use that USB offers, vibration can be a problem. If standard USB’s friction-fit isn’t keeping your devices connected, one of these solutions may be the perfect fit to turn these problematic pulsations into good vibrations.

 

For more information on USB, read our blog post A Tutorial on USB.

 

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