PD fast charging is now quite popular, and it is also developing towards high power. 65W fast charging accessories are everywhere. The launch of 100W or even DIY 130W accessories that break the PD fast charging standard has raised the user's fast charging experience to a new level, truly solving the charging pain points of laptops.
Recently, the charging head network has obtained a high-power laptop adapter for Lenovo . The product model is ADLX95YCC3A, which supports up to 95W PD fast charging. JD is priced at 199 yuan. Let me bring you a detailed disassembly of this product to see how it is made of materials.
Lenovo 95W power adapter comes with input and output cables, and the input power cord and body are separated by wire body design. The take-out can be used in different regions. Replacing the corresponding specification power cord can be used, which is very convenient.
power cord has passed the CCC certification and the specification is 10A 250V~.
There are convex teeth on the other end of the wire head for easy plugging and unplugging.
line body specification is 3x0.75mm².
charger body adopts a straight board shape, but the two ends are curved, and the surface of the body shell is frosted, with 95W gravure printed on the front corner.
Charger parameter nameplate
Product model: ADLX95YCC3A
Input: 100-240V~ 50/60Hz 1.6A
Output: 5V3A, 9V3A, 15V3A, 20V4.75A, 95W Max
Manufacturer: Qun Optoelectronic Energy Technology Co., Ltd.
product has passed KC, UL, PSE, CP, GS, EAC, CE, CCC, NOM, NYCE and other certifications, and can be used in most regions around the world. The input end of
uses the plum blossom three-pin interface.
USB-C wire head plastic shell has concave surfaces and small convex teeth, and red plastic locks are also equipped with convenient plug-in and unplugging and finishing design.
charger body length is about 13cm.
width is about 5.5cm.
thickness is about 2.9cm.
Using ChargerLAB POWER-Z KT002, the charger was measured to support Samsung 5V2A, DCP and PD3.0 protocols.
and have four sets of fixed voltage gears: 5V3A, 9V3A, 15V3A, and 20V4.75A.
2. Lenovo 95W PD fast charger disassembles
Remove the body shell and adopts ultrasonic welding packaging.
body shell uses PC flame retardant material plastic.
Input terminal, you can see the heat sink and PCB board soldering fixation.
The other end of the gap is stuffed into a small aluminum plate.
The entire PCBA module wraps the isolation board and the heat dissipation aluminum sheet, and sticks tape in the middle to fix it.
Insulation tape is also pasted on the inside of the isolation board.
PCB board with glue and thermal pad pasted, and the thermal pad corresponding to the chip is hollowed out.
PCB board has a look at the front of the board, and special heat sinks are also provided on the input end and both sides, and components are glued and reinforced.
top heat sink is bonded with PFC boost inductance , and the heat sinks on both sides are bonded with rectifier bridge , primary switch MOS tube and synchronous rectifier tube, which are all main heating devices.
Clean out the silicone, the components are sparsely distributed and it is not easy to accumulate heat.
After observing the charger circuit, it was found that Lenovo's laptop adapter uses APFC boost to power the flyback switching power supply. The switching power supply is output in a wide range, and the architecture of the output voltage is controlled by the protocol chip through the optocoupler. Next, we will start from the input to understand the information of each component one by one.
input end plastic mother seat close-up, wires are rolled tightly, and soldered with the metal sheet on the mother seat.
Metal sheet is fixed with screws and is insulated and isolated with transparent plastic board.
There is a delay fuse, common mode inductor and X capacitor next to the wire.
delay fuse specification is 3.15A 250V, common mode inductor is double-wire winding, used to filter out EMI interference.
safety gauge X capacitance capacity 0.33μF. There is also a common mode inductor and rectifier bridge on the other side of the capacitor. There are two red film capacitors and filter inductors on the right side of , and inductors wrapped in insulating tape.
Remove the heat sink to facilitate further understanding of the components on the side.
UR4KB80 rectifier bridge close-up.
Two red film capacitors and inductors are used for rectifying and filtering.
Onseme NCP1937 combined controller integrates power factor correction (PFC) controller and quasi-resonant (QR) flyback controller for compact and high-efficiency switching power adapter.
ON Semi NCP1937C4 Details.
PFC boost switch tube comes from the big factory Infineon , IPD60R380P6, withstand voltage 650V, and resistance 0.38Ω.
Infineon IPD60R380P6 Detailed information.
PFC boost inductor close-up.
silk-print U3JB ultrafast recovery diode, MURS360, 3A600V withstand voltage, two are used in parallel for APFC boost rectification.
The horizontal high-voltage filtering electrolytic capacitor is from Kingsoft, with a specification of 450V 100μF.
primary switch MOS tube is also from Infineon, IPP65R380E6, with a voltage withstand voltage of 700V, and a resistance of 0.38Ω.
Infineon IPP65R380E6 Detailed information.
MOS tube is coated with thermally conductive grease on the back to help conduct heat and have better heat dissipation effect.
transformer grounding processing.
top inkjet has information, produced by Qunguang.
blue Y capacitor close-up, with magnetic beads in the pin.
two 1009 optocouplers are used to feedback the output voltage and other protection functions respectively.
Silk-print IAZEM secondary synchronous rectification controller is actually an MP6908 of MPS core source semiconductor, which supports a wide output voltage range, supports DCM/CCM/quasi-resonant operation modes, and supports high-side and low-side synchronous rectification.
MP6908 detailed specification parameters.
charging head network learned that the RedmiBook Pro 15 laptops that use MPS MP6908 are equipped with a 100W charger, IKEA 40W 2A1C desktop fast charger, Lenovo laptop 65W PD fast charger, Samsung 65W PD fast charger, Flash 100W 3C1A gallium nitride fast charger, Anker 65W PD fast charger, Xiaomi 65W GaN charger, and other MPS synchronous rectifier chips are also used by dozens of products such as Xiaomi 9 Pro original 45W fast charger, thinkplus 45W USB PD charger, Zimi 65W 2C1A desktop PD fast charger, etc.
synchronous rectifier tube uses Fuding AP10N012H, with a 100V pressure and a 12.5mΩ resistance.
Fuding AP10N012H data information.
The two output filtering electrolytic capacitors are also from Kingsoft.
specifications are 25V 680μF.
USB PD protocol IC uses Weiquan WT6636F, which is a protocol chip (TID number: 1080018) that has passed the USB-IF Association USB PD3.0 (PPS) certification. It also passes Qualcomm QC4+ certification, and the certification number is QC20200316138.
WT6636F supports USB PD3.0 and PPS, built-in programmable constant voltage and constant current control, integrated low-side current sampling amplifier, support line loss compensation, support multiple protection functions, including overvoltage protection of data pins, internal integrated 10bit ADC for voltage and current detection, built-in 8051 core microcontroller, and built-in discharge MOS tube.
Weiquan WT6636F Data information.
According to the charging head network, the products that use WT6636F include THEONE 65W 1A1C fast charging charger, RedmiBook Pro 15 laptop comes with a standard 100W charger, Qingke Mini 45W fast charging charger, LG gram laptop comes with a standard 65W gallium nitride charger, Lenovo thinkplus 65W gallium nitride lipstick power supply Pro, NetEase Intelligent Manufacturing 61W gallium nitride fast charging, etc. At the same time, dozens of fast charging products use Weiquan chips.
output VBUS switch tube close-up, Fuding AP4024EM, NMOS, withstand voltage 30V, resistance 4.5mΩ.
Fuding AP4024EM Detailed information.
Output wire sleeve has a magnetic ring to prevent interference. All
have been disassembled, let’s take a family photo.
Charging head network disassembly summary
Lenovo's laptop adapter comes with input and output cables, and the input power cable can be replaced. It can be used in most regions around the world, which is very friendly to business travel users. Compared with traditional laptop power supplies, this accessory comes with a USB-C interface and has four voltage levels: 5V, 9V, 15V, and 20V. The maximum output power is 95W, and the charging speed of the laptop will be very fast.
charging head network was disassembled and found that the AC-DC part of the charger consists of the ON Semiconductor NCP1937 combined controller with Infineon MOS, and the Xinyuan semiconductor MP6908 and Fuding synchronous rectifier tube to form a synchronous rectifier switching power supply with APFC. The output voltage is controlled by Weiquan WT6636F. The input and output filter capacitors are from Kingsoft, Taiwan, and the overall materials are very solid.
In addition, the internal components of the charger are sparsely distributed, and the gaps are filled with silicone to reinforce and heat conduction. The main heating devices are equipped with special heat sinks, and the outer periphery is covered with large-area aluminum sheets. The input and output wires are insulated, and the details are also very particular.
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