Introduction
Huntkey has launched a 140W GaN charger equipped with two USB-C ports and one USB-A port. Both USB-C ports support up to 140W PD 3.1 output and include AVS voltage profiles. The charger also supports Xiaomi 90W HyperCharge. It offers multiple power distribution strategies, such as 65W + 65W and 100W + 30W output combinations.
The charger features an active PFC circuit and adopts a GaN-based power solution. A reliable internal thermal management design is implemented to ensure stable long-term operation at high power levels, thereby enhancing the overall user experience. Next, let’s take a closer look at its internal components and design.
Product Appearance
The front of the packaging box features the Huntkey branding, a simplified illustration of the product, the product name, and markings such as PD 3.1 support.
A product specification label is affixed to the back.
The package includes the charger and a user manual.
The enclosure is made of flame-retardant PC material with a silver-gray metallic surface coating.
The front is printed with the Huntkey and GaN Pro.
Product specification information is printed on the input-side housing.
Model: HKC14028050-0B1
Input: 200–240V~ 50/60Hz 2.0A
Single-port output:
C1/C2: 5V⎓3A, 9V⎓3A, 12V⎓3A, 15V⎓3A, 20V⎓5A, 28V⎓5A, 140W Max
A1: 5V⎓3A, 9V⎓3A, 12V⎓2.5A, 5–11V⎓3A, 33W Max
Dual-port output:
C1 + C2: 65W + 65W (130W Max)
C1/C2 + A1: 100W + 30W (130W Max)
Triple-port output:
C1 + C2 + A1: 65W + 45W + 27W (137W Max)
Input: 100–120V~ 50/60Hz 2.0A
Single-port output:
C1/C2: 5V⎓3A, 9V⎓3A, 12V⎓3A, 15V⎓3A, 20V⎓5A, 100W Max
A1: 5V⎓3A, 9V⎓3A, 12V⎓2.5A, 5–11V⎓3A, 33W Max
Dual-port output:
C1 + C2: 45W + 45W (90W Max)
C1/C2 + A1: 65W + 30W (95W Max)
Triple-port output:
C1 + C2 + A1: 60W + 30W + 10W (100W Max)
The product has passed CCC certification.
It is equipped with a foldable plug.
The output side is equipped with two USB-C ports and one USB-A port.
“140W” is engraved above the ports.
The port labels are marked next to each.
The length of the charger is about 65.40 mm (2.57 inches).
The width is about 66.97 mm (2.64 inches).
The thickness is about 33.02 mm (1.3 inches).
Compared with the Apple 140W charger, its size advantage is obvious.
That's how big it is on the hand.
The weight is about 216 g (7.62 oz).
ChargerLAB POWER-Z KM003C shows that the USB-C1 supports QC2.0/5, FCP, SCP, AFC, PD3.1, PPS, DCP, and Apple 2.4A protocol.
It has six fixed PDOs: 5V3A, 9V3A, 12V3A, 15V3A, 20V5A, and 28V5A, along with two sets of PPS voltage profiles at 5–11V5A and 5–20V5A, and an AVS voltage profile ranging from 15–28V 140W.
The USB-C1 port also supports Xiaomi 90W HyperCharge.
The USB-C2 port supports the same protocols as the USB-C1 port.
The PDO messages are identical as well.
The USB-C2 port also supports Xiaomi 90W HyperCharge.
The USB-A supports UFCS, QC3.0, FCP, SCP, AFC, and DCP protocols.
Teardown
Next, let's take it apart to see its internal components and structure.
Upon opening the input-side housing, it is found that the enclosure is assembled using ultrasonic welding.
After removing the PCBA module, graphite thermal pads are attached to the inner side of the enclosure, with insulation applied.
The length of the PCBA module is about 61.01 mm (2.4 inches).
The width is about 63.28 mm (2.49 inches).
The thickness is about 28.47 mm (1.12 inches).
The top of the PCBA module is covered by a metal heat sink, with a Mylar sheet used for insulation on the inner side.
The bottom is covered by a plastic plate and a heat sink.
The plastic plate features an integrated barrier used for primary-to-secondary isolation.
The front side of the PCBA module houses components such as a time-delay fuse, common mode chokes, a bridge rectifier, film capacitors, electrolytic capacitors, a transformer, solid capacitors, and buck inductors.
The back side contains components including the master control chip, primary MOSFET, synchronous rectifier, synchronous buck MOSFETs, protocol chip, and VBUS MOSFETs.
The time-delay fuse is from Betterfuse, part number 936, rated at 4A 250V.
The 10D681K varistor is from STE and is used for input overvoltage protection.
The common mode choke is a bifilar-wound type, used to suppress EMI interference.
The safety capacitor X2 is from STE, with a capacitance of 0.47 μF.
A close-up of another common mode choke.
The bridge rectifier is from YJ, model RD8JC100, rated 8 A 1000 V, in a JC package.
Two film capacitors are from CARLI, rated 1 μF 450 V.
Close-up of the filter inductor.
The electrolytic capacitor is from AiSHi.
The capacitor is rated 12 μF 400 V.
The primary control IC is from RENESAS, marked with 5H, model iW3627-00. It is a single-stage AC/DC constant voltage controller with power factor correction, supporting both isolated and non-isolated topologies. It achieves very low load and line voltage regulation without the need for a secondary feedback circuit and requires no external loop compensation components. The IC is packaged in a SOT-23 format.
The primary MOSFET is from Innoscience, model INN700D130D. It is a 700 V enhancement-mode GaN FET with an on-resistance of 101 mΩ, supporting ultra-high switching frequencies and featuring zero reverse recovery charge. The device has very low gate charge and output charge, meets JEDEC industrial standards, includes built-in ESD protection, and complies with RoHS, lead-free, and EU REACH regulations. It is suitable for high-efficiency, high-density applications such as AC-DC and DC-DC conversion. The MOSFET comes in a DFN 8×8 package.
Here is the information about Innoscience INN700D130D.
The capacitor powering the primary control IC is from CapXon, rated 47 μF 35 V.
Close-up of the transformer.
The OR1009 optocoupler, used for output voltage feedback.
The SMD Y capacitors are from TRX. Their compact size and light weight make them well-suited for high-density power products such as GaN fast chargers. The part numbers are TMY1471K and TMY1101K.
The synchronous rectifier controller is from RENESAS, marked with L9, model iW610-01C. It supports QR, ZVS, ACF, and LLC switching power supply applications, operates in both DCM and CCM modes, and can be used for low-side and high-side configurations. The device supports an output voltage range of 3–28 V and comes in a SOT-23 package.
The synchronous rectifier is from YJ, model YJG75G15H. It is an NMOS with a voltage rating of 150 V and an on-resistance of 11.8 mΩ, in a PDFN5060-8L package.
The solid capacitor is from PolyCap, rated 1000 μF 35 V.
The other three solid capacitors are from SAMXON, UBR series, each rated 820 μF 35 V.
There is also one more solid capacitor with the same part number.
At the output, there are three independent small PCBs, each with one socket.
The front of the two small PCBs with a USB-C socket is identical.
The back is also identical.
The front of the PCB with the USB-A socket contains the synchronous buck controllers, synchronous buck MOSFETs, buck inductor, solid capacitor, and protocol chip.
The back of the PCB has the USB-A output VBUS MOSFET.
The synchronous buck controllers for the two USB-C interfaces are from SouthChip, model SC8002. The chip supports an input voltage range of 4.6V to 36V and can be configured for dual or single output. The SC8002 adjusts the output voltage to a fixed 5V or a custom voltage by setting the feedback resistors. It also provides high-precision output current limiting. When the current limit is reached on either of the two output channels, the SC8002 enters constant current (CC) mode. The total output power can be set via a resistor, facilitating constant power control.
The SC8002 also allows for frequency settings and the selection of either PWM or PFM operating modes. With the minimal BOM, it provides maximum functionality for various user applications. The SC8002 supports comprehensive protection features, including undervoltage protection, overvoltage protection, short-circuit protection, auto-restart, and overtemperature protection. It is primarily used in applications such as in-vehicle chargers, multi-port adapters, hubs, and industrial voltage conversion.
Close-up of another SouthChip SC8002.
The two sets of synchronous buck MOSFETs are from Vergiga, model VS4620GEMC. They are NMOS with a voltage rating of 40V and an on-resistance of 6.4mΩ, in a PDFN3333 package.
Here is the information about Vergiga VS4620GEMC.
The buck inductor is insulated with a heat shrink tube.
The other buck inductor is also insulated with a heat shrink tube.
The secondary filter solid capacitor is from Koshin, rated 330 μF 25 V.
The other capacitor has the same part number.
The protocol chip for the two USB-C ports is from CPS, model CPS8860H. This is a highly integrated dual-port charging chip that supports PD3.1, PPS, VCONN, QC2.0/3.0, UFCS, VFCP, SCPA/B, AFC, AppleMode, and other fast charging protocols. It also supports BC1.2 CDP mode and comes in a QFN24 package.
The CPS8860H controls the CV/CC feedback loop, enabling dual-port fast charging output between 3.3V and 21V. It features dual-port management logic, power sharing, and integrates a temperature sensor and two VCONN power supplies for electronic marker detection. It complies with RoHS, halogen-free, and lead-free standards. With minimal external components, it offers an efficient and excellent multi-protocol dual-port charging solution.
The two VBUS MOSFETs are also Vergiga VS4620GEMC.
This VBUS MOSFET is also Vergiga VS4620GEMC.
Close-up of the other VBUS MOSFET.
The synchronous buck controller used for the secondary buck output of the USB-A port is also SouthChip SC8002.
The two synchronous buck MOSFETs are marked with Q35N03A and come in a PDFN3333-8L package.
Close-up of the paired buck inductor.
The solid capacitor is from PolyCap, rated 270 μF 16 V.
The protocol chip is from CPS, model CPS8849B. It is a highly integrated fast charging protocol controller chip that supports PD3.1, QC2.0/QC3.0, SCPA/B, AFC, Apple, and other mainstream fast charging protocols. It integrates a constant voltage (CV) loop and a low-side constant current (CC) loop, with a programmable reference voltage to meet the requirements of the PD3.1 specification.
The USB-A port output VBUS MOSFETs are also marked with Q35N03A.
Well, those are all components of the Huntkey 140W GaN Charger.
Summary of ChargerLAB
Here is the component list of the Huntkey 140W GaN Charger for your convenience.
The USB-C ports support 140W PD3.1 and Xiaomi's 90W Surge Fast Charging, as well as output strategies such as 65W, 45W, and 27W, meeting the fast charging needs of mainstream devices from brands like Apple, Samsung, and others.
After taking it apart, we found that it uses the RENESAS iW3627-00 + iW610-01C single-stage PFC power solution, along with Innoscience INN700D130D gallium nitride power devices. The output features three independent DC-DC step-down circuits, each utilizing the SouthChip SC8002 buck solution. The three output ports are controlled by the CPS CPS8860H and CPS8849B protocol chips.
The charger has extensive use of glue for internal sealing, with additional heatsinks installed and graphite tape affixed to the inner side of the casing for enhanced cooling. A plastic isolation plate is placed between the primary and secondary sections for insulation. The materials and workmanship are of excellent quality.
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