Recently, the charging head network got a 135W fast charging charger from Huawei, which uses fixed American plugs, and is designed to be a detachable module, which can be replaced with a grounding power cord, which makes it possible to use it in more countries and regions, and at the same time avoid users from feeling electrocuted, which can be said to be a pretty good design.
In addition, PD3 is also supported1. Fast charging and PPS fast charging can provide up to 135W fast charging for laptops, and can also be well adapted to various brands of Android mobile phones, which is very friendly to business people overall. The following charging head network will disassemble this product in detail, let's take a look.
The charger adopts a square design, with a circular transition on both sides of the waist, and with the treatment of the glossy surface, the overall texture is high-end, which is the same as the style of Huawei's previous chargers.
The front and back of the fuselage are still designed with a classic small concave surface, which is convenient for users to plug and use.
The side is printed with the product certification mark and warning words, and the charger has passed CE, UKCA, NOM, NYCE, UL, PSE certification.
The input housing is printed with the detailed specifications of the charger.
Model: HW-200675UP0
Input: 100-240V 50 60Hz 25a
Output: 5v3a, 9v3a, 12v5a, 15v5a, 20v47a、20v6.75a
Huawei terminal***
The charger is also certified for energy efficiency Level VI.
The input is equipped with fixed US stock pins.
In addition, the pin module is detachable, and the user can replace the plug with the power cord, so that the application scenario is not limited by space.
The fixed slot on the fuselage is made of metal, which seems to be a groundable design, which is disassembled and verified below.
The HUAWEI 135W Supercharge and laptop and phone logos are printed on the output housing, indicating that the charger can be adapted to these devices.
The connection between the output cable and the fuselage is designed to resist bending and bending.
The measured length of the charger body is 8019mm。
The width is 7522mm。
The thickness is 2864mm。
In addition, the length of the USB-C output cable is measured to be about 158cm.
Compared with Apple's 140W gallium nitride charger, Huawei's charger is smaller in size.
The size of the product body in the hand is intuitively felt.
In addition, the total weight of the charger is about 378g.
Using ChargerLab Power-Z KM003C, Huawei's charger supports FCP, SCP, and QC20、pd3.1. DCP charging protocol.
The PDO packet shows that the charger also has 5V3A, 9V3A, 12V5A, 15V5A, and 20V675A five sets of fixed voltage ranges, and 33-21V5A set of PPS voltage ranges.
After making a basic understanding of the appearance and performance of Huawei's 135W fast charging charger, let's disassemble it and take a look at the internal design and workmanship materials of this charger.
The fuselage shell is disassembled along the sides, and the shell is encapsulated using an ultrasonic welding process.
The outermost layer of the PCBA module is pasted with graphite thermal conductive sticker to enhance heat dissipation performance.
All cores inside the output cable are covered with magnetic rings to resist interference, and some cores are designed with pluggable terminals.
The other part of the wire core is welded and connected, and the pin is insulated by a heat shrinkable tube.
Take out the PCBA module, and the other half of the shell is also pasted with graphite thermal conductive stickers.
The measured length of the PCBA module is 699mm。
The width is 6832mm。
The thickness is 2444mm。
Remove the metal heat sink covering the outside of the module and insulate it with adhesive tape and Mylar sheets on the inside.
After charging the heat sink, you can see that there is also a heat sink on the back of the motherboard, which is soldered and fixed.
The gap between the welded devices on the front of the PCBA module is basically filled by thermal conductive adhesive to help dissipate heat and fix the devices on the module into a whole, which has better protection.
Clean up the glue, the front of the PCBA module is at a glance, the lower left corner is the AC input terminal, soldering fuse, common mode inductance, safety X2 capacitor. Right-hand welded filter capacitor and PFC boost inductor. Above the inductor is a high-voltage filter capacitor. The upper left corner is the switching transformer, and the upper right corner is the synchronous rectifier board and filter capacitor.
The back of the motherboard is soldered with PFC main control chip, PFC switch tube, primary main control chip, switch tube. The output protocol chip is soldered on the secondary side.
Through the observation of the PCBA module, Huawei's 135W USB-C power adapter adopts PFC+ACF switching power supply architecture, synchronous rectification, and a wide range of voltage output. The output voltage is regulated by the protocol chip through optocoupler feedback. Let's start with the inputs to learn about each component.
Module inputs at a glance, soldered fuses, safety x2 capacitors, and multi-stage common-mode inductors.
The input fuse is from Huade Electronics, and the specification is 315a 250v。
This common-mode inductor is welded above the fuse.
The safety X2 capacitor is from STE Matsuda Electronics, and the specification is 022μf。
The second stage of the common mode inductor is wound with insulated wire and enameled wire, and the bottom is insulated with bakelite board.
The varistor is from Celte, with the specification SFV10D471K, for surge protection.
The first common mode inductor is made of magnetic surrounding, and the inside and bottom are insulated with bakelite boards.
On one side of the module, a rectifier bridge, a filter capacitor, a filter inductor and a PFC boost inductor are welded. The rectifier bridge is equipped with a heat sink to help dissipate heat.
The rectifier bridge is removed, and the entire heat sink is installed for heat dissipation.
The rectifier bridge is from Yangjie Electronics, the model is GBL410A, and the specification is 4A 1000V.
The two film capacitors are from Kaili and have a specification of 125μf450v。
The bottom of the filter inductor is fixed with bakelite board insulation.
The PFC controller adopts NXP TEA19162, which is used to boost the rectified voltage for active power factor correction, integrates X-capacitor discharge components, no external components are required, integrates soft-start and shutdown, supports high-precision voltage regulation and boost, and has multiple built-in comprehensive protection functions.
The PFC switch is from Dongwei, model OSG65R125JF, which is a NMOS with a withstand voltage of 700V and a conduction resistance of 125M, and is packaged in PDFN8*8.
The PFC rectifier tube from Pingwei, model MR1060G, is a 10A 600V ultra-fast recovery diode in a TO252 package.
The PFC step-up inductor core is insulated with tape wrapping.
The middle area of the other end is equipped with a high-voltage filter electrolytic capacitor, a power supply capacitor for the main control chip, and a plastic frame insulation for the high-voltage electrolytic capacitor jacket.
The high-voltage filter capacitor is from Fengbin and is specified at 100 F450V.
The silk screen printing of the primary main control chip AG=8H.
The power supply capacitor of the main control chip is also from Fengbin, and the specification is 22 F80V.
The half-bridge driver is from STF, model L6498, and is used to drive the ACF top tube.
The primary main switch MOS tube adopts Dongwei OSG65R200JF, withstand voltage 700V, conduction resistance 200M, PDFN8X8X8 package.
Dongwei OSG65R900GT, withstand voltage 650V, conduction resistance 900M, DFN5*6 package, used for ACF circuit clamp switch.
The transformer jacket on the other side of the module is insulated with a plastic shell, the output line is welded on a vertical small PCB, two solid-state filter capacitors are welded on the other side of the small board, and the third solid-state filter capacitor is welded on the small board.
The small plate is removed, and in addition to the welded solid-state capacitors, there are also two synchronous rectifier tubes on the front.
Synchronous rectifier controller and Schottky diode soldered on the back.
The transformer is from Jialong Haijie, and the secondary stage is wound with multi-layer insulated wire.
The EL1018 optocoupler is used for output voltage feedback and protection functions.
Close-up of another EL1018 optocoupler.
Synchronous rectifier controller silk screen printing jwjxj, from Jewalt.
The two synchronous rectifier tubes are from Infineon, model BSC093N15NS5, NMOS, withstand voltage 150V, conduction resistance 93mω。
The Schottky diode is from PY Pingwei, model PS15150LT, 15A 150V specification, which is used to improve the synchronous rectification efficiency.
The two output filter capacitors are from the Emerald, CH series solid capacitors, and are rated at 680 F 25V.
The third output filtered solid capacitor is from Fengbin, PT series solid state capacitor, specification is 560 F 25V.
The output protocol chip is silkscreened 8k=8j.
Close-up of the output VBUS switch.
A list of all dismantling and a family photo.
Huawei's 135W charger comes with 1The 8-meter USB-C output cable is more suitable for fixed occasions. It supports 135W output power and PPS fast charging, which can meet the super fast charging of Huawei mobile phones, laptop power supply and other brands of Android mobile phone charging.
Through the dismantling of the charging head network, it was learned that the charger adopts PFC+ACF switching power supply design, the PFC controller is from NXP, model TEA19162, and the two high-voltage switch tubes are from Dongwei. The synchronous rectifier controller is from Jewalt, model JW7726BL, and the synchronous rectifier tube is from Infineon.
The PCBA module inside the product is glued and filled in a large area, and covered with heat sinks, and graphite thermal conductive paste is also pasted inside the shell to further improve the heat dissipation performance and reduce the temperature rise of full-load output for a long time. In addition, the internal capacitors come from Fengbin and Emerald, and the components are all first-line manufacturers, and the overall material workmanship is solid and reliable.