It’s been a while since we posted a teardown video of a Satechi product.
And many of you guys requested to take apart this Satechi 165W desktop charger.
So, here it comes.
The most impressive feature is those four USB-C ports.
We posted the teardown video of AENZR 130W GaN charger, which also has four USB-C ports.
You can click the upper right corner to take a look.
The Satechi logo and product are printed on the front.
Some selling points and features are on the back.
Open the packaging.
We can see the charger itself.
The power cord and stand are in another small box.
And that’s all the items inside.
The input prongs of the power cord are not grounded.
And its length is about 1.2 m (3’ 11.24”).
It adopts a sleek space gray design.
The Satechi logo is printed on a matte surface.
All specs info are printed on the input end.
Model is ST-UC165GM.
It can support input of 100-240V~50/60Hz 2.5A.
When charging a single device, four USB-C ports can support up to 100W.
When charging multiple devices, the power decreases sequentially from PD1 to PD4.
And the total power won’t exceed 165W.
It also has qualified to multiple standards.
Different USB-C ports have their own names to distinguish them.
And an indicator light is at the top.
The size of this charger is about 100 x 72 x 32mm (3.94 x 2.83 x 1.26 inches).
Compared with the Apple 140W charger, it’s just slightly longer,
but has three more ports.
And the weight is about 336g (11.85 oz).
The additional stand can turn your charger into a charging dock instantly.
After connecting to the power supply, the indicator light turns blue.
The ChargerLAB POWER-Z KM003C shows the PD1 supports FCP, SCP, AFC, QC3.0, SFCP, PD3.0, PPS, QC5 protocols.
It also supports five fixed PDOs of 5V/9V/12V/15V 3A, 20V 5A, and a set of PPS.
We found the supported protocols and PDO info of the other three USB-C ports
are the same as the first USB-C port.
So, the charging performance of these four USB-C ports is exactly the same.
Next, let’s go ahead and take it apart.
Start from the output panel.
After removing the output panel, the entire PCBA module can be easily pulled out.
The front and back are wrapped with brass heat sinks.
And the black Mylar sheet for insulation is under the heat sink.
There’s a layer of thermal pad between the internal components and the Mylar sheet.
The gaps between components are not filled with silicone adhesive.
So, the space utilization can be further improved theoretically.
ChargerLAB found it adopts LLC topology and has a PFC circuit.
The current will be filtered by synchronous rectification circuit for output.
Next, let's introduce every single component.
The input socket is fixed by through-hole technology.
The input time delay fuse is 5A 250V.
The first common mode choke is next to the fuse.
The red safety X2 capacitor is from JURCC.
1μF.
The second common mode choke is next to the bridge rectifier.
And the bridge rectifier is used to rectify the AC into pulsed DC for the PFC circuit.
800V 6A.
The pulsed DC is filtered by film capacitors and inductor.
Those two film capacitors are from JK-ET (TQCAP).
1μF 450V.
And the filter inductor is wrapped with Mylar tape for insulation.
The master control chip is from MPS,
which is a multi-mode PFC and current-mode LLC combo controller.
It can greatly improve space utilization.
The green capacitor that powers the master control chip is from Chn Cap.
47μF 35V.
Those two GaN FETs for the PFC circuit are from GaN Systems and adopt PDFN5 x 6 package.
650V, 150mΩ.
The sampling resistor is used to detect the current of the GaN FETs for the PFC circuit.
Resistance is 33mΩ.
The PFC boost inductor L6 is tightly wound and insulated with yellow tape.
The PFC rectifier is from Global Power and adopts DFN5 x 6 package.
It’s a silicon carbide diode with a withstand voltage of 650V and a current of 4A.
The electrolytic capacitor for input filtering is soldered on the side,
from Chn Cap.
120μF 420V.
Those two MOSFETs for LLC topology are from CR Micro and adopt TO252 package.
700V, 230mΩ.
The green resonant capacitor is also from JURCC.
0.022μF 630V.
The LLC transformer T1 is also tightly wound with tape for insulation.
Those two blue Y capacitors on two sides are from JYA-NAY.
The optocoupler is used to regulate the output voltage.
After introducing the PFC circuit and LLC topology,
let’s see the synchronous rectification circuit.
The controller is from MPS.
And two rectifiers are from Hunteck and adopt DFN5 x 6 package.
65V, 3.8mΩ.
There’re four small vertical PCBs for four USB-C outputs.
And those three solid capacitors for output filtering are from Chn Cap.
25V 680μF for each.
And this is the indicator light.
Four small PCBs are exactly the same.
So, we only take a single PCB as an example.
The protocol chip is from Ismartware, which controls the buck circuit and identifies protocols.
One of the buck MOSFET is from Techcode and adopts PPAK3*3-8 package.
30V, 5.6mΩ.
Another buck MOSFET on the back is also from Techcode, but in a different model.
30V, 5mΩ.
The buck inductor is insulated with heat-shrinkable tubing.
And the solid capacitor is also from Chn Cap.
25V 220μF.
The USB-C connector is also fixed by through-hole technology.
Finally, the 32-bit MCU with an M0 core is from MindMotion and adopts QFN20 package.
It can automatically control the power distribution of four USB-C ports.
Well, that’s all components for this 165W desktop charger from Satechi.
Compared with the AENZR 130W GaN charger we took apart before,
the internal components and structure are pretty similar.
But this is the first time we’ve seen
all four USB-C ports of a multi-port charger have the same performance.
It means you do not need to distinguish which port is faster or slower when charging a single device.
OK. That’s all for today’s video.
And don’t forget to drop a like, leave your comments, and subscribe to us.
I’ll catch you guys in the next video. Bye.