ChargerLAB got a 100W GaN charger from Xiaomi, which comes with Redmi Laptops.
Xiaomi also launched a non-GaN 100W charger before.
Let's take a closer look at the internal changes after upgrading the GaN charger.
Firstly, it adopts pure white plastic and rounded corners.
The 100W is in the upper left corner.
But the input prongs cannot be folded.
Let's take a closer look at the specs info.
Model is AD100G.
It supports input of 100-240V~50/60HZ 1.6A
and output of 5V3A, 9V3A, 11V5A, 12V3A, 15V3A, 20V5A.
It is only equipped with a USB-C port.
And the size is about 62 x 62 x 31.6mm (2.44 x 2.44 x 1.24 inches).
And the weight is about 183g (6.46 oz).
Compared with Apple 96W charger, the size is much smaller.
The ChargerLAB POWER-Z KM002C shows it can support QC3+, QC4+, PD3.0,
and PPS fast charging protocols.
It also supports five fixed PDOs of 5V3A, 9V3A, 12V3A, 15V3A, 20V5A, and a set of PPS.
Next, let's use the spudger to pry along the gap and remove the top case.
And then, take out the internal PCBA module.
The blue and grey wires are connected to the PCB and wrapped with heat-shrinkable tube.
We found lots of silicone adhesives and heat sinks inside.
There's a notch in here.
The PFC boost inductor is insulated with conductive fabric.
Let's remove the heat sink and clean up the PCB.
The silicone adhesives are filled in these gaps to fix components and dissipate heat.
Flip to the back. We can see the Navitas GaN IC.
This charger adopts QR flyback topology and is equipped with PFC circuit.
The protocol chip can output the fixed voltage.
Next, let's introduce all components one by one.
The input fuse is from Better Electronics.
3.15A 250V.
This is the first common mode choke.
The second common mode choke is next to it, wrapped with heat-shrinkable tube.
The safety X2 capacitor is 0.33μF.
The bridge rectifier is from Yangjie D6UB100.
6A 1000V.
And two red film filter capacitors are 1μF 450V.
Here is the filter inductor, also wrapped with heat-shrinkable tube.
Next, let's talk about the PFC circuit.
The PFC controller is from MPS,
which features a very low supply current and improves light-load efficiency.
And the GaN IC for PFC boost is from Navitas NV6134A and adopts QFN6*8 package.
It integrates driver and lossless current sampling circuit.
260mΩ, 650V.
The PFC boost inductor is wound with Litz wire to reduce losses.
Two fast recovery diodes are used for PFC boost rectification and
charging the filter capacitor, respectively.
Those three filter capacitors are from AiSHi.
Two of them are 420V 27μF.
The third one is 420V 15μF.
69μF in total.
The primary PWM controller is from ON Semiconductor NCP1342,
which can support active X2 capacitor discharge and wide Vcc range.
This AiSHi filter capacitor can power the PFC controller and primary controller.
100V 10μF.
The GaN IC for QR topology also adopts Navitas NV6134A,
same as the PFC boost.
Here is the transformer.
Those two blue Y capacitors are from SEC.
One of them has a magnet.
And two CT1018 optocouplers are used for output voltage regulation and protection, respectively.
The synchronous rectifier controller is from MPS MP6908A.
Maximum operating frequency is 600KHz.
The synchronous rectifier is from Toshiba.
100V, 3.7mΩ.
Two BERYL output filter capacitors are connected in parallel.
820μF 25V.
Another filter inductor is next to it and wrapped with heat-shrinkable tube.
The protocol chip is from Weltrend WT6636F,
which has passed USB PD3.0 (PPS) and QC4+ certification.
The output VBUS switch MOSFET is from AOS AON6354 and adopts DFN5*6 package.
30V, 2.75mΩ.
Finally, here is the USB-C socket.
Well, that's all components of this Xiaomi 100W GaN Charger.
It continues the simple and compact design.
And the GaN components make it even smaller than the previous generation.
As the single port 100W charger, it is more suitable for some high-power laptops.
And the supported PPS can make it compatible with more devices.
Ok. That's all for today's video.
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See you in the next video. Bye.