Lenovo laptop users just need, no longer need to bring "bricks", the rescuer 135W gallium nitride fast charge disassembly

preface

Lenovo launched a C135 gallium nitride charger in March this year, supporting the rescuer Y9000 2022 notebook 135W charging, on the basis of USB PD fast charging 100W, adding a private 135W fast charging, with a dedicated USB-C square port cable, to meet the notebook high-power power supply, with USB-C cable, can support mobile phone fast charging.

Lenovo Savior C135 quick charge comes with two 1.5-meter-long USB-C cables and USB-C port cables, users can use directly after purchasing the charger, without additional purchase, convenient for users to use. Charging head network has got this 135W Gallium Nitride charger, let's take a look at the design and material of Lenovo's C135 Gallium Nitride charger.

Lenovo Savior 135W Gallium Nitride Fast Charge Out of the Box

The design of the box is relatively sci-fi, and the top surface is printed with the product brand, name and appearance map.

At the bottom, product selling points, parameters, and business information are printed.

The package contains a charger, two cables and an instruction manual.

Both cables are lashed out using cable ties, which are also printed with the LEGION brand.

One of them is the most Lenovo laptop users are familiar with the C to square port line, this charger can only achieve a maximum power output of 135W with it. The cable is bent and bent, the shell is frosted at both ends, and the USB-C end is also embossed with the LEGION brand logo.

The USB-C head is designed on both sides of the slope, and the cross-section looks like crystal.

The inside of the square mouth at the other end is yellow plastic with gold-plated pins.

The measured square mouth line length is about 154cm.

Using The Chargelab POWER-Z KM002C measured the cable also has an E-Marker chip and supports Lenovo 135W fast charging.

The CC line is the same style design, and both ends are also designed with LEGION brand logo.

The length of the measured cable is about 153cm, and the length of both wires is 1.5 meters, which is in line with the official introduction.

The power transmission capacity of cc line measured by KM002C is 20V5A, and it supports 100W PD fast charging. From the two cables attached, it can also be seen that whether it is charging Lenovo laptops with 135W or charging other devices with 100W PD fast charging, Lenovo has considered them for users.

The Rescuer's 135W charger features a geometric design with angular square shapes and a recognizable shell with a glossy matte design.

The bright area of the fuselage is designed with LEGION brand logo, and the input end adopts a fixed national standard pin.

The other side of the design has the word 135W, making it easy for consumers to understand the maximum output power of this charger.

There is charger parameter information on the input housing

Model: LA135

输入：100-200V~50/60HZ 2.5A Max

输出:5/9/12/15V3A、20V6.75A(135W max)

Manufacturer: Lenovo (Beijing) Co., Ltd

Manufacturer: Shenzhen Oulutong Electronics Co., Ltd

The charger has been CCC certified.

The other end is equipped with a single USB-C interface, and the black rubber core does not expose copper.

The measured charger body height was 64.89mm.

The width is 66.41mm.

The thickness is 31.18mm. The volume of the charger is about 134.37cm and the power density is 1W/cm through three-dimensional calculation.

Compared with the Apple 140W charger, the volume is much smaller.

The size of the hand is intuitive.

The net weight of the charger is about 291g.

Using the ChargerLAB POWER-Z KT002 measured USB-C port support QC2.0, QC3.0, PD3.0 and PPS fast charging protocol, as a product mainly designed for Lenovo laptop users, it also supports QC and PPS fast charging, and the performance is still very good.

In addition, it also has five fixed voltage levels of 5V3A, 9V3A, 12V3A, 15V3A and 20V5A, and a set of PPS voltage levels of 3.3-21V5A. Charger 135W fast charge as Lenovo's private fast charge, and did not test it, need to be matched with the attached square mouth line to achieve the fast charge.

Lenovo Savior 135W Gallium Nitride Fast Charge Disassembly

After having a basic understanding of the appearance, size, performance, etc. of the rescuer's 135W Gallium nitride charger, the following continues to disassemble it in detail to see how the material works.

First of all, the shell is removed from the seam of the charger shell, and the internal PCBA module is wrapped in a pure copper heatsink to increase the heat dissipation area, strengthen the heat dissipation performance, and optimize the notebook for long-term high-load application scenarios.

The pure copper heat sink is welded and fixed to the PCB, and the heat sink is fixed by snaps between the heat sinks.

The input AC wire welds are glued and insulated.

Close-up of the heatsink weld.

The length of the PCBA module measured using a vernier caliper is approximately 60.5mm.

The width is approximately 61.6mm.

The thickness is approximately 26.4mm.

Disassemble the heat sink, there is a black insulation board inside, and the insulation board and the PCBA module are coated with a large area of glue to dissipate heat.

At a glance at the front of the PCB, the vertically welded board on the left is the input rectifier filter circuit, the lower part is the PFC boost inductor, the upper right corner is the switching transformer, and the lower right corner is the output filter capacitor and usb-C mother.

At a glance on the back of the PCB, the lower left corner is the synchronous rectifier, the upper left is the feedback optocoupler and MPS highly integrated master control chip, the right side is the nano micro gallium nitride power chip, and the lower right part is the PFC boost circuit.

Through observation, it is found that this charger adopts PFC+QR switching power supply architecture design, PFC performs power factor correction, QR flyback power supply performs wide voltage output, and finally the protocol chip controls the output voltage of the interface through the MPS master chip. Let's start with the inputs to understand each device.

A separate small board is soldered at the input to improve space utilization. Soldered fuses, EMI filter circuits and rectifier bridges on the small board. There are plastic brackets between the small and large plates to support and insulate.

The input wires are soldered to the platelet, and the AC input is first connected to the fuse.

Slow melt fuse at the input end, size 5A 250V, from CONQUER merit, MST series ultra-small delay fuse.

Behind the fuse is a first-stage common-mode inductor, with both enameled and insulated wires and wrapped around a green magnetic ring.

Anxu X2 capacitor close-up, capacity of 0.33μF, from Shenzhen Jinghao.

The X capacitor discharge chip adopts the core peng micro PN8200, which is used to quickly discharge the X capacitor after the AC input is disconnected, without the need for X capacitor discharge resistor, which can reduce the standby power consumption of the power supply.

The second stage of common mode inductors, using flat copper wire winding, two stages of common mode inductors and X capacitors to form emi filters.

The AC input is fed through the EMI filter circuit to the rectifier bridge for rectifying the AC into pulsating DC. Rectifier bridge from HY Hongyang, model GBJ2508, 25A 800V.

The back of the small board is welded with two SMD Y capacitors, from Heshentang.

The pulsating DC power output by the rectifier bridge enters the PFC circuit through the filtering of the film capacitor and magnetic ring inductance, and the power factor correction is performed.

Both film capacitors are available in 1μF 450V specifications.

Magnetic ring filter inductor close-up, black magnetic surround, enameled wire fixed with black glue.

The PFC power factor correction circuit compensates for the phase difference between the input current and the voltage by means of a boost, reduces the inrush current when charging the large-capacity electrolytic capacitor in the high-power charger, and avoids the impact of the inrush current on the power grid waveform. At the same time, PFC can also reduce the capacity of the primary electrolytic capacitor and reduce the volume of the charger by boosting.

The PFC controller is from MPS Chip Source Semiconductor, model MP44018A, and is a multi-mode PFC controller with enhanced light load efficiency. Provides high-performance active power factor correction with streamlined external components. The MP44018A features valley-to-bottom turn-on to reduce switching losses, built-in and well-established protection features, and enhanced dynamic response.

PFC switch tubes from Wuxi Xinjie Energy, model NCE65TF130F, NMOS, withstand voltage 650V, conductivity 110mΩ, US USING TO220F insulated package.

The PFC boost rectifier is from WeEn Ruineng, model BYV29D-600P, is an ultra-fast recovery diode, 600V 9A, using TO252 package.

The PFC boost inductor uses an ATQ23 core.

The high voltage filter electrolytic capacitors are from Chengxing, four of which are 18μF 420V.

The other has a size of 27μF 420V, with a total capacity of 99μF.

The switching power supply main control chip adopts MPS MPX2002, which integrates the primary flyback controller, secondary rectifier controller and isolated communication, supports CCM and QR working modes, no load power consumption is less than 30mW, no audio noise.

The primary switch tube adopts nano-micro NV6136A, which is nano-micro's latest GaNFast series gallium nitride power chip, which has built-in GaNSense lossless current sampling technology, supports non-destructive current detection output, no external sampling resistance, saves area and improves conversion efficiency.

Nano-NV6136A built-in 170mΩ Gallium nitride switch tube, QFN6*8 package, built-in driver support 10-30V supply, support 2MHz switching frequency. At the same time, the chip also integrates more efficient protection and drive circuits, with comprehensive protection functions.

Through disassembly, the charging head network learned that the nano-micro GaNFast power chip has previously been adopted by dozens of products of well-known brands such as Motorola 68W Gallium Nitride Charger, Dell 60W Gallium Nitride Fast Charge, OPPO 50W Cookie Gallium Nitride Fast Charge, Xiaomi 65W 1A1C Gallium Nitride Fast Charge Charger, Nubia 65W Deuterium Front Three-Port Gallium Nitride Fast Charge, Lenovo YOGA 130W Dual USB-C Port Fast Charge, Andek 65W Gallium Nitride Charger (League of Legends Edition) and other well-known brands.

The filter capacitor that powers the PFC controller and primary master chip, from Guankun, is 15μF 100V.

Close-up of the switch transformer, magnetic core wrapped around copper foil shield, and wrapped around high temperature tape insulation.

Synchronous rectifiers are from New Clean Energy, model NCEP023N10LL, NMOS, withstand voltage 100V, conductivity 1.7mΩ, available in DOLL chip package. The MPX2002 main control chip has its own synchronous rectification drive signal output, and the secondary synchronous rectification does not require an external synchronous rectification controller.

The CT1018 optocoupler detects the output power by the protocol chip and performs PFC-stage switching control according to the output power.

The output is filtered using two solid capacitors, one with a size of 1000μF 25V.

The other is from Polycap Berry Kai, with a specification of 680μF 25V and a VQ series that can withstand high temperatures of 125°C.

The USB-C female is welded vertically on the protocol panellet, and the VBUS switch tube, TVS protection tube and output female are welded on one side of the board.

The other side solders the protocol chip and the current sampling resistor.

USB-C female close-up, steel sleeve via welded fixed, rubber ring seal between the front end and the housing.

The protocol chip adopts the WT6636F, and the chip has passed the USB-IF Association USB PD3.0 (PPS) certification, TID number: 1080018. In addition, it has passed qualcomm QC4+ certification, certification number QC20200316138.

WT6636F supports USB PD3.0 and PPS, built-in programmable constant voltage constant current control, integrated low-side current sampling amplifier, support for line loss compensation, support for multiple protection functions, including overvoltage protection of data pins, internal integration of 10bit ADC for voltage and current sensing, built-in 8051 core microcontroller, built-in discharge MOS tube.

The NTC thermistor above the WT6636F chip is used to detect the internal temperature of the charger for overtemperature protection.

The output VBUS switch tube is from The New Clean Energy, model NCEP40T15GU, NMOS, withstand voltage 40V, conductance resistance 1.09mΩ, DFN5*6 package.

All disassembled, let's take a family portrait.

Charging head net disassembly summary

Lenovo Savior 135W Gallium Nitride Fast Charge adopts a classic low-key black design, a single C port supports 100W PD fast charge output and Lenovo private 135W fast charge output, using the two lines that come with it can be used to power Lenovo notebooks or power other brands of laptops. USB-C port with 5V3A, 9V3A, 12V3A, 15V3A, 20V5A voltage gear, and 3.3-21V5A PPS output, the mobile phone and computer charging can be very compatible, is a take-all charger.

The charging head network learned through disassembly that this charger was OEM by Eurocomm and used the PFC+ flyback architecture to meet the wide voltage output. The charger has a built-in MPS MP44018A PFC controller and MPX2002 main control chip, using nano-NV6136A gallium nitride power chip for the main switch, PFC switch tube, synchronous rectifier tube and output VBUS switch tube are from New Clean Energy, and the protocol chip uses Weiyi WT6636F.

The internal workmanship of the charger is compact, and the front and back sides of the PCBA module are covered with pure copper heat sinks and filled with thermally conductive silicone, which fully optimizes the thermal performance for notebook long-term high-load application scenarios to ensure stable work.