GaN charger: why modern chargers are so small and powerful
A GaN charger is a power adapter that uses gallium nitride (GaN) transistors instead of ordinary silicon ones. They are more efficient and run cooler, so the charger can be half the size for the same power.
In plain words
Imagine two water pipes: a regular one with rough walls and a new, perfectly smooth one. The smooth one can carry the same amount of water while being thinner, and less energy is lost to friction. GaN is that "smooth pipe" for electricity: fewer losses, less heat, so the body can be more compact.
How it works
- A charger converts alternating current from the socket into low-voltage direct current.
- To do this, transistors switch on and off thousands of times a second.
- GaN transistors switch faster and with fewer losses than silicon ones.
- Less heat means smaller heat sinks and transformers.
- The result is a powerful charger (65, 100, 140 W) the size of an old phone charger.
Where you'll see it
GaN chargers are sold by Anker, Ugreen, Baseus, Samsung, Apple and others. The body is usually marked "GaN" with the wattage. They often have several USB-C and USB-A ports for charging multiple devices.
Does it matter when buying
Yes, if you have several devices or travel: one 65-100 W GaN charger replaces several chargers and a laptop brick. Check for USB PD and PPS support, how power is split between ports, and a reputable brand - cheap fakes can be dangerous.
Myths
- Myth: GaN charges a phone faster than a regular charger of the same wattage. Reality: Speed depends on wattage and protocols; GaN gives compactness and efficiency.
- Myth: All small chargers are GaN. Reality: Size is a hint, but check the specs.
FAQ
Are GaN chargers safe?
Yes, if they are certified products from reputable brands.
How is power split between ports?
It depends on the model - check the power distribution table in the specs.
Can I charge a laptop with a GaN charger?
Yes, if it has enough power and the laptop supports USB PD.