Hi, guys. Welcome back to today’s video.
Today, ChargerLAB is gonna take apart this Lenovo LEGION 135W charger,
which can support Lenovo private protocol for the latest Y9000 series.
The front of the packaging is printed with the product name.
A blue and white Lenovo icon is on the lower right corner.
Flip to the back. Here’re some specs info.
Open the box. Here are two charging cables and the charger.
The first one is the Lenovo customized cable, which can achieve 135W after connecting to the
power port of the latest Lenovo laptop.
The square connector is yellow.
And the cable is about 1.53m (5' 0.24'').
The ChargerLAB POWER-Z KM002C shows it has an E-Marker chip.
Since the KM002C cannot detect Lenovo private protocol,
we can only see 100W instead of 135W.
The second one is the dual USB-C cable.
And the length is about 1.5m (4’ 11”).
KM002C shows it also integrates the E-Marker chip.
And then, let’s remove the plastic film.
This charger adopts traditional shape, and looks like a black brick.
The “135W” and “LEGION” are on the front and back.
This charger adopts fixed prongs. And the model is LA135.
It can support input of 100-240V~50/60HZ 2.5A.
And the output is 5/9/12/15V 3A, 20V6.75A (135W Max).
Here is the single USB-C port.
The size of the charger is about 65*66*31mm (2.56*2.6*1.22 inches).
So, the power density is about 1W/cm³.
And the weight is about 290g (0.64 lb).
It’s significantly shorter than Apple 140W charger.
The ChargerLAB POWER-Z KT002 shows it supports QC2.0, QC3.0,
PD3.0, and PPS fast charging protocols.
The Lenovo private protocol can not be detected.
It also has five fixed PDOs of 5V3A, 9V3A, 12V3A, 15V3A, 20V5A, and a set of PPS.
OK. After the brief introduction of this charger. Let’s go ahead and take it apart.
Firstly, try to use the spudger to open it.
It doesn’t work.
Then, let’s use the cutting machine to open it.
Take out the internal PCB module, which is wrapped with pure copper heat sink
to enhance heat dissipation and make sure the stability of high power charging.
The heat sink is fixed on the PCB.
And the red and purple wires are insulated by silicone adhesives.
Remove the heat sink.
And we can see the black insulating plate.
Continue to remove it.
And the entire PCBA is filled with silicone adhesives.
ChargerLAB found it adopts QR topology and has PFC circuit.
Then, let’s start from the input to introduce all components.
Firstly, the upper and lower PCBs are supported by plastic brackets.
The specs of CONQUER fuse are 5A 250V.
This is the first common mode choke.
And here is the second one.
The safety X2 capacitor is 0.33μF, from Jinghao.
The X capacitor discharge chip is from Chipown PN8200.
They can form the EMI filter circuit.
After that, we can see the bridge rectifier here, which comes from HY GBJ2508.
25A 800V.
Two SMD Y capacitors are on the back of the PCB, from Holy Stone.
The specs of the two film capacitors are 1μF 450V.
This is the toroidal-core inductor.
This charger is equipped with PFC circuit.
And the PFC controller comes from MPS MP44018A,
which has multi-mode with enhanced light-load efficiency.
The PFC MOSFET is from NCE Power and adopts TO220F package.
650V, 110mΩ.
The PFC boost rectifier is from WeEn,
which is an ultra-fast recovery diode and adopts TO252 package.
600V 9A.
And this is PFC boost inductor.
Those four electrolytic capacitors are from Chengxing.
18μF 420V.
The other one is 27μF 420V. 99μF in total.
The master control chip is from MPS MPX2002,
which integrates primary flyback controller, secondary rectifier controller
and supports CCM and QR modes.
The primary MOSFET is from Navitas NV6136A,
which integrates lossless current sampling technology and does not require external resistors.
The built-in driver supports 10-30V power supply and 2MHz switching frequency.
So, it can save space and improve conversion efficiency.
The filter capacitor that powers the PFC controller and the primary controller is from Su’scon.
15μF 100V.
The transformer is wrapped with heat resistant tape for insulation.
The synchronous rectifier is from NCE Power and adopts TOLL package.
100V, 1.7mΩ.
The CT1018 optocoupler can adjust the output voltage detected by the protocol chip.
There’re two solid output capacitors. This one is 1000μF 25V.
The other one is from Polycap, 680μF 25V.
The USB-C receptacle is vertically soldered on the small PCB.
And the protocol chip is on the back.
There is a rubber sealing ring in here.
The protocol chip is from Weltrend WT6636F, which can support QC4+, PD3.0, and PPS protocols.
It integrates 10bit ADC for voltage and current detection,
discharge MOSFET, and low-side current sampling amplifier.
The NTC thermistor can detect the internal temperature for overheat protection.
The output VBUS MOSFET is from NCE Power and adopts DFN5*6 package.
40V, 1.09mΩ.
Well, that’s all the components for this Lenovo legion charger.
The internal layout of the charger is pretty compact.
Since it is pretty small, the entire module is covered with pure copper heat sink
and filled with silicone adhesives to ensure charging stability.
If you’re the user of the latest Lenovo laptop that can support 135W charging
and want to find a smaller charger to replace the original one, you can consider this charger.
OK. That’s all for today’s video.
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I’ll catch you guys in the next video. Bye.