August 24, 2018

2 questions that say a lot about wireless charger design

By Team Ventev Topic:

Buying a new wireless charger? There are many choices.

The problem is, wireless charging is so new, a lot of us don’t know what we’re looking for.

Our advice: Start your search by looking for a wireless charger that’s compatible with all of the existing charging standards, and one that charges your phone at the highest possible speed your phone will accept.


Now let’s talk about design features. We recently received two questions about the design of Ventev’s wireless charging car kit and wireless chargestand that highlight two wireless charger features you should also keep in mind.

Q: Why don’t Ventev wireless chargers have a fan?

Charging a phone usually generates some amount of heat, which designers must find a way to deal with. The most prominent wireless charging standard, known as Qi, has stringent temperature requirements.

Some wireless chargers incorporate fans into their design to keep the charger cool. But, even the smallest fans are noisy. In our homes, we tend to want products that are quiet, especially come bedtime. If you had to choose between a silent charger and one that’s constantly whirring, which would you choose?

Our chargers don’t need fans, because they operate at lower temperatures, which we achieve by using high-quality, thermally efficient components and a housing designed to dissipate heat.

We continuously test our products for heat management, meaning you get a high-performance product that doesn’t overheat and doesn’t make a sound.

Q: Why does Ventev rely on a single-coil design for wireless chargers?

There are two parts to wireless charging: a transmitter and a receiver. The transmitter is a coil inside the charger that generates a magnetic field. The receiver, housed inside your phone, takes that magnetic field and converts it to electricity through a process called magnetic induction. To wirelessly charge, you must align the transmitter and the receiver. If the alignment is off, your phone won’t charge.

Adding multiple coils to a charger increases the area where the device will charge. Unfortunately, this comes at the expense of charging efficiency and speed.

Multiple coils create interference among the multiple magnetic fields, causing dead or low-power spots. This makes it much more difficult to ensure a phone charges at its optimal rate.

Our products use a single coil because this is the best way to optimize charging.

While some features are more important than others, the details matter, and we considered them all when designing the wireless chargestand and wireless charging car kit.

What other questions do you have about wireless charging? Ask us on Twitter or Facebook.  

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