Introduction
Recently, we got our hands on a 100W EU charger from Honor. Unlike previous models we’ve taken apart, this one features a brand-new GaN-based design. It supports PD, PPS, and Honor’s proprietary 100W fast charging protocol, making it suitable not only for Honor devices but also for charging Apple, Samsung, and other brand devices efficiently. Next, let’s take it apart to see its internal components and structure.
Product Appearance
It uses a flame-retardant PC housing with a smooth surface.
It is equipped with EU-style plugs.
The output end features a single USB-C port.
The length of the charger is about 55.02 mm (2.17 inches).
The width is about 54.92 mm (2.16 inches).
The thickness is about 28.35 mm (1.12 inches).
It is significantly smaller than the Apple 96W charger.
That's how big it is in the hand.
The weight is about 151 g (5.33 oz).
ChargerLAB POWER-Z KM003C shows that it supports FCP, SCP, PD3.0, and PPS charging protocols. And it has five fixed PDOs of 5V3A, 9V3A, 12V5A, 15V5A, and 20V5A. It has one set of PPS, which is 5-21V5A.
Teardown
Next, let's take it apart to see its internal components and structure.
Cut open the casing at the output end.
Cut open the remaining casing to take out the PCBA module.
The plug pins connect to the PCBA module through metal spring clips.
The length of the PCBA module is about 51.48 mm (2.027 inches).
The width is about 50.55 mm (1.99 inches).
The thickness is about 24.31 mm (0.96 inches).
The PCBA module is potted to improve weather resistance and heat dissipation.
The output-end solid capacitors are reinforced with adhesive, and the USB-C socket is fitted with a protective pad.
The back of the module is covered with a metal heat sink plate, wrapped with tape, and insulated using a mylar sheet.
Remove the potting. The module front has a bridge rectifier, capacitors, a transformer, and a plastic separator between primary and secondary.
This design uses a single fully integrated primary-secondary chip placed on the bottom side of the PCB. The bottom side also houses synchronous rectifier MOSFETs and SMD Y capacitors.
At the input side, you can see a time-delay fuse, common mode choke, NTC thermistor, safety X2 capacitor, and electrolytic capacitors.
The time-delay fuse is from Betterfuse, part number 936, rated at 3.15A 250V.
The common mode choke is insulated with a white heat-shrink tubing.
The NTC thermistor is used to suppress inrush current during power-up.
The safety X2 capacitor is from SEC, with a capacitance of 0.22μF.
This side features a secondary common mode choke, bridge rectifier, I-shaped inductor, and three additional electrolytic capacitors.
The secondary common mode choke is insulated with black heat-shrink tubing.
The input bridge rectifier is from Pingwei, model D8KB10A, rated at 8A 1000V, and uses a D3K package.
The I-shaped inductor is insulated with heat-shrink tubing.
The five electrolytic capacitors are from AiSHi, each rated at 400V 27μF.
On the other side of the module, there is a capacitor supplying power to the master control chip and a transformer. A plastic isolation board is located to the left of the transformer.
The master control chip is the SouthChip SC1875, a high-performance multi-mode flyback PWM converter in an SSOP38 package. It innovatively integrates GaN FET, primary controller, secondary controller, and protocol controller into a single chip. Using patented PQLINK® isolation technology instead of traditional optocouplers enables secondary-side regulation, greatly simplifying the design and manufacturing of portable power supplies.
The SC1875 features adaptive switching frequency foldback for high-efficiency conversion across the full load range. At high input voltage and full load, it uses SR-ZVS to improve efficiency. At low input voltage and full load, it optimizes efficiency with a hybrid CCM/QR operation. In no-load conditions, it automatically switches to burst mode to reduce power consumption. The chip includes comprehensive protection mechanisms to prevent circuit damage under abnormal conditions.
Additionally, its unique frequency dithering and intelligent drive functions effectively suppress noise interference and enhance EMI performance.
The capacitor supplying power to the master control chip is from AiSHi, rated at 120V 10μF.
Close-up of the transformer.
The SMD Y capacitor is from TRX. Its compact size and light weight make it ideal for high-density power products like GaN fast chargers. The part number is TAY2221KB.
On the front of the PCBA, there are also two TRX TAY2151KB SMD Y capacitors.
Close-up of the other capacitor.
The synchronous rectifier is from Pingwei, model PW040N10ES. It is an NMOS with a 100V rating and 3.4mΩ on-resistance, housed in a DFN5×6 package.
The two solid capacitors for output filtering are from Koshin, each rated at 25V 560μF.
The output VBUS MOSFET is also from Pingwei, model D50N03HL. It is an NMOS with a 30V rating and 2.9mΩ on-resistance, housed in a DFN3×3 package.
Removed the small output PCB. On the front side, there is a small capacitor and a USB-C socket, with a plastic ring and protective pad at the connector’s front end.
The back of the small PCB has no components.
Well, those are all components of the HONOR 100W USB-C GaN Charger.
Summary of ChargerLAB
Here is the component list of the HONOR 100W USB-C GaN Charger for your convenience.
It supports not only Honor’s 100W proprietary fast charging but also PD3.0 and PPS 100W fast charging, meeting high-power charging needs for smartphones, tablets, and laptops—including Honor devices.
After taking it apart, we found it is designed based on the SouthChip fully integrated SC1875 chip. This industry-leading high-integration component combines the functions of five traditional chips into one, greatly simplifying the circuit, reducing design complexity, lowering system costs, and improving reliability.
The synchronous rectifier and VBUS MOSFET are supplied by Pingwei, with capacitors from AiSHi and Koshin. The PCBA module is encapsulated with potting compound and equipped with a heat sink to aid cooling, ensuring reliable materials and workmanship.
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