Yesterday, we released the teardown video of Lenovo YOGA CC 130W GaN Charger.
But another Lenovo brand, Xiaoxin, also made a 100W GaN charger.
It also has dual USB-C ports. So, let’s take a look at this one.
The packaging design is very young. There is a small brand logo here.
The important features and specifications are on the back.
Small and portable, double USB-C, replaceable cable,
high power and folding pins. Model is XXC100G.
Maximum output for single port is 100W. Maximum output for Dual port is 65+35W.
The manufacturer comes from Honor Electronic.
Now let’s open the package.
There are a charger, cable and manual inside.
The length of the cable is 1.5 meters. Use ChargerLAB POWER-Z KT002 to test.
The maximum output is 100W. The USB standard is USB2.0.
Now, let’s look at the charger.
The charger shell is combined with two U-shaped plastic plates.
And the two parts of the shell are processed with shiny and matte respectively.
The most attractive thing is still the brand logo, simple and unique.
The charger adopts foldable pins. Easy to carry and save space.
That’s two USB-C ports, with C1 and C2 logos printed next to the ports.
But when you charge one device, any port can support 100W, which is very convenient.
Take a look at the specification, Yeap, almost the same as the box label.
The charger’s actual size is 70*69*29mm (2.76*2.72*1.14 inches),
and the weight is 253g(8.92 oz). Take out the Apple 96W charger again to compare,
It’s still smaller than Apple. Let’s use ChargerLAB
POWER-Z KT002 to test the protocol, USB-C supports Apple 2.4A, QC2.0/3.0, FCP, PD3.0,
and five fixed PDOs: 5V3A, 9V3A, 12V3A, 15V3A, 20V5A.
The two ports are the same.
This charger adopts high-frequency QR architecture.
As the power is up to 100W, PFC circuit is also added. It also adopts wide voltage output of switching
power supply synchronous rectification and two protocol chips, which control two USB-C outputs.
SO, let’s start from the input end to know what’s inside.
This time, we still need a cutting machine.
Only to slowly cut the shell, can we take out the module inside.
After opening the shell, we can see a layer of graphite heat sink
and the pure copper heat sink, which can further enhance the heat dissipation effect.
There is also insulating tape on the top heat sink.
We can also see lots of glue inside for reinforcement and heat dissipation.
There is an insulating plate between the bottom heat sink
and the motherboard for isolation.
You can clearly see the charger has three parts after cleaning up the thermal conductive glue.
The first part is the input filter and PFC circuit.
The middle part is the switching power supply circuit.
And the third part is the secondary buck-boost output circuit.
A classic multi-port 100W fast charger.
A small board is welded vertically at the input end.
Remove the small board. There is a 6R8 inductor on the back.
There are two-level common mode chocks, safety X capacitors, film filter
capacitors and filter inductors on the front. Small common mode chock and filter inductor are
wrapped by heat shrink tube for protection. This is a time-delay fuse.
Here are two rectifier bridges, which can share the heat.
Here is the PFC boost inductor. The two electrolytic capacitors
for high-voltage filtering in the middle are welded on the small board.
The top is covered with a plastic shell for insulation.
Remove the small board. The back is the PFC boost switch tube and the rectifier tube.
PFC boost controller is On-Bright OB6566. And it’s the first time to use on small GaN fast charger.
PFC boost inductor uses RM8 magnetic core. PFC boost switch tube adopts Oriental
Semiconductor, with extremely low switching loss.
A PFC rectifier tube is next to it, from WeEn Semiconductor.
Two electrolytic capacitors for high-voltage filtering are from Guankun, a well-known brand.
On the other side is the transformer, two solid capacitors for output filtering,
with an isolation board between them.
In addition, there is an output filter inductor on the right.
The power supply capacitor of master control chip comes from Hong Kong manyue.
The master control chip of switching power supply adopts ON Semiconductor NCP1342,
which most GaN chargers use nowadays. The primary high-voltage switch MOS tube adopts
Innoscience INN650D02, packaged by DFN8x8. Here are two optocouplers.
And this is four Y capacitors, two in series and two in parallel.
The synchronous rectifier chip is the latest DK5V100R05M from Dongke
Semiconductor, seems the first to see it. This chip has built-in controller, driver and
ultra-low 5mΩ internal resistance MOS, etc. The integration level is quite high,
which helps to reduce the size of the charger. Here are two solid capacitors for synchronous
rectifier output filtering also from manyue. Here is the filter inductor.
The output end is equipped with a secondary boost and buck small board.
The On-Bright OB2613 protocol chip used by both ports are on the back.
We also found When single-port is inserted,
it’ll be switched by the MOS tube on the right. When dual ports are inserted at the same time,
C1 port can adjust the voltage by itself. C2 port can use the synchronous buck-boost circuit
on the right side for secondary buck-boost. And finally got 65+35W totally for dual ports.
The synchronous buck-boost circuit controller adopts Southchip SC8703, packaged by QFN4x4,
and integrates built-in drive. It supports 2.7V-29V wide voltage
and many protection functions. Here are four Alpha & Omega
Semiconductor NMOS tubes for outputting synchronous rectification and buck-boosting.
The front of the small board has a buck-boost inductor, filter inductors,
capacitors and USB receptacle port.
The two solid filter capacitors are both 25V220 µF.
OK, that’s all for our today’s teardown.
All in all, this charger looks unique and focuses on portable and dual-port fast charging.
In addition, the power is also enough to charge different devices.
We found there are multi-layer heat conduction materials on the outside of the charger module.
Secondly, the components come from well-known brands in the industry. Very clear.
So, what do you think about this charger? Leave your comments below.
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