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Several days ago, we tore down a 130W charger from Dell.
And today, we found out his brother,
the 90W charger from Dell.
Let's see what's inside this charger.
The packaging is big, and we can see the charger, brand logo, and power.
And here is how you use it.
And here is the specification of this charger.
And the certification marks are at the bottom.
The packaging contains the charger, cable, and manual.
This charger is wrapped with protective plastic film.
The shell adopts flame-retardant PC.
The matt surface can prevent fingerprints and scratches.
Dell logo is at the top.
The input adopts 3-Prong interface.
And the output comes with a USB-C cable, as well as a USB-A port.
But the USB-A can only support 10W.
There is the specification of the charger.
Total output power is 100W.
USB-C port supports 20V4.5A, 15V3A, 9V3A, 5V3A.
Maximum output is 90W.
USB-A supports 5V2A, 10W.
It also supports wide-range input of 100-240V 50/60Hz.
The rated current is 1.7A.
Here are various product certification marks from different countries or regions.
As for the charger size, the length is about 130mm (5.12 inches).
The width is about 66mm (2.6 inches). And thickness is about 22mm (0.87 inches).
The weight is about 356g (0.78 lb). And it's about 444g (0.98 lb) with the cable.
The length of the cable is about 1.8m (5'11'').
After using ChargerLAB POWER-Z KT002 to test it,
We find this cable does not have E-Marker chip.
Because the integrated USB-C cable can be without that chip.
The indicator light will light up after plugging it in.
The KT002 shows the USB-C can support Apple 2.4A, Samsung 5V2A, DCP, and PD3.0 protocol.
And it also has four fixed PDOs of 5V3A, 9V3A, 15V3A, 20V4.5A.
The USB-A can only support Apple 2.4A, Samsung 5V2A, and DCP protocol.
Next, let's see the compatibility of this charger.
For MacBook Pro 16-inch, the power is about 63W.
For MacBook Air M1, the power is about 46.4W.
For iPad Air4, the power is about 27W.
For Huawei Mate 40 Pro, the power is about 12W.
For Mi 10 Pro, the power is about 16W.
For Samsung S20 Ultra, the power is about 14W.
So, that would be the brief introduction of this charger.
Then let's continue to tear it down.
So, we can see the entire module has been wrapped by copper heat sink.
And the plastic plate below is used for insulation and isolation.
Remove the heat sink, and there is a lot of thermal adhesives between the components.
Then, continue to clean it up.
ChargerLAB found its switching power supply adopts
the architecture of PFC boost and QR flyback topology.
The secondary circuit is controlled by the protocol chip.
The front of the PCB will be some plug-in components, such as capacitor,
inductor, transformers, and two large heat sinks.
The back is the control circuit.
As for those two heat sinks,
The big one can dissipate heat of components of primary circuit.
And the small one can assist rectifier bridge to dissipate heat.
The ground wire acrosses the primary and secondary circuits.
The input side has fuse, common mode chokes, film capacitors, etc.
The fuse is 3.15A 250V.
This is a primary filter capacitor, which comes from Luminous Town, 420V 82μF.
Here is a rectifier bridge, 4A 800V.
FPC boost inductor is next to it, which is controlled by the master control chip on the back.
The master control chip comes from ON Semiconductor NCP1937C4.
It integrated PFC controller and quasi-resonant flyback controller.
Two Navitas GaN MOSFETs are used as the MOSFET of PFC boost and switching power supply, respectively.
Model is NV6117.
It adopts an integrated driver and complex control circuit in a 5*6mm QFN package.
Withstand voltage is 650V. Resistance is 120mΩ.
Here is an ultra-fast recovery diode, used for rectification after PFC boost.
Here is the main transformer of the switching power supply
Two optocouplers in here
And this capacitor is 35V 100μF.
The synchronous rectification and output filtering circuit are on the right.
It consists of two capacitors and one inductor.
A small PCB is on the left, equipped with step-down circuit of USB-A.
Turn it back.
Two Murata SMD Y capacitors are between primary and secondary circuits.
This chip is the MPS synchronous rectifier controller,
which is very common in GaN chargers.
The maximum operating frequency can reach 600KHz.
Here is the Alpha & Omega synchronous rectification MOSFET
Withstand voltage is 100V.
The parallel diode on the left is used to improve the light load efficiency.
The Alpha & Omega output VBUS switch MOSFET is in the lower right corner.
There are two protocol chips, marked with DPD021P.
Here is a 5A fuse at the output, used for over-current protection.
And we can also see the built-in cable has only three cores inside.
Continue to remove the small PCB of USB-A.
It has two layers, this is an alloy inductor, and the step-down circuit is below.
A filter inductor and a VBUS switch MOSFET are next to the USB-A.
Well, that would be all for the teardown of this charger.
The USB-A port is different from other chargers.
But the charging protocol is limited to PD.
If your devices can't support PD, the maximum power will be 10W.
All the components come from the top brand.
And the large heat sink and thermal adhesives
enhanced internal stability and thermal conductivity.
OK, that's all for today's teardown. Hope you'll like it.
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See you in the next video. Bye.