expiredphoinix | Staff posted Jan 14, 2026 08:02 AM
Item 1 of 3
Item 1 of 3
expiredphoinix | Staff posted Jan 14, 2026 08:02 AM
UGREEN Nexode 4-Port up to 65W GaN Wall Charger w/ 3x USB-C, 1x USB-A
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"This happens even when total power draw is within the charger's rated capacity"
I have this charger and use it to power my mini PC using the USB-C rear port. When I'm not using my mini PC, I use it to charge my UGreen 20K power bank and it does the job really well.
All of this ultimately comes down to cost reduction.
Good multi-port chargers do use Dynamic power distribution, but they are designed so that the redistribution is seamless and invisible to the user.
Low-cost chargers typically share a single power rail across all ports.
When a new device is connected, the charger must reallocate the available power.
During this process, the output voltage may briefly drop or reset, causing an existing device to experience a temporary charging interruption.
Higher-quality chargers also perform dynamic power distribution, but they implement it differently.
They use advanced power management ICs, per-port power control, and soft transition logic to adjust current and voltage without cutting off the output.
As a result, devices continue charging without any noticeable interruption, even when additional devices are plugged in.
Actual meaning
Dynamic power distribution means:
adjusting output power in real time based on the number of connected devices and their power demands.
High-end chargers also use dynamic power distribution.
The difference lies in how it is implemented.
Low-end vs High-end chargers
(Difference in dynamic power distribution methods)
Low-end chargers
Dynamic power distribution method: Hard redistribution
Characteristics:
Adding a port triggers a full output reset
Output voltage briefly drops to 0V
Devices perceive this as a "charging disconnect"
High-end chargers
Dynamic power distribution method: Soft / seamless redistribution
Characteristics: Output is maintained while current is adjusted gradually
PD renegotiation is handled per port
No noticeable interruption from the user's perspective
What makes this possible
Advanced PD controller ICs
Per-port power switches / DC-DC converters
Real-time power monitoring and control logic
Sufficient output capacitance to maintain voltage stability
Therefore, it's not about a single "magic chip,"
but about the entire PMIC and overall circuit design that supports this behavior.
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