HIGHSAY has launched the C3 Pro 3-in-1 Smart Display Super Charger for Apple users. This charger continues Apple's minimalist design aesthetic, integrating three output ports (2C1A) into a body roughly the size of an earphone case. It supports blind-insertion single-port peak power delivery of 70W and the latest PD3.2 SPR AVS fast charging protocol, perfectly matching the fast charging requirements of the iPhone 18 series.
The front of this HIGHSAY charger features a high-definition smart display interaction screen and an integrated touch button, capable of providing real-time feedback on per-port output power, total power, temperature, charging curve status, and cable E-Marker specifications.
Additionally, this product supports instant identification of Apple devices. When connected to iPhone 15-18 series, USB-C iPad, or MacBook M1-M5 series devices, it directly displays the specific device name and real-time battery percentage on the screen, making charging power and connected ports easily visible.
Product Appearance
The packaging box adopts a blue and white color scheme, with the brand and product model printed on the front along with a product rendering image.
The back of the packaging box prints detailed product specification parameters, safety warning instructions, manufacturer information, and relevant safety certification marks. Specification parameters will be introduced in the subsequent physical object section.
Upon opening the package and removing all items, besides the charger body itself, the package also includes a C to C fast charging data cable, a user manual, and a service card.
The included USB-C to USB-C data cable uses a high-density white braided body, which is flexible, wear-resistant, pull-resistant, and knot-free.
The terminals at both ends of the data cable feature silver anodized aluminum alloy shells, with the HIGHSAY logo laser-engraved on the surface.
The HIGHSAY C3 Pro 70W Smart Display GaN Charger uses a flame-retardant material shell. The light mist white version being torn down here features an excimer UV coating process treatment on the surface, offering a delicate and warm touch that is fingerprint-resistant and dirt-proof. The output port panel is slightly concave with three ports (2C1A) arranged vertically.
The top of the body is embedded with a glossy black high-definition smart display interactive panel, where the black-and-white contrast design enhances visual impact.
The front of the body covers a full high-transparency black glossy window, with a hidden high-definition TFT smart color display screen integrated inside. Below it is an integrated capacitive touch button identifier, supporting single-click to switch display interfaces and long-press for 2 seconds to rotate the screen orientation.
On one side of the body near the bottom, there is a light gray English brand logo for HIGHSAY, presenting a low-key and introverted visual style.
On the other side of the body, centered, is the HIGHSAY brand logo.
The input end of the charger is equipped with foldable pins compliant with new national standards, with a complete product specification nameplate located below.
Product nameplate laser-engraved on the input end shell:
Product Name: HIGHSAY 70W Smart Display Charger
Model: C3 Pro
Input: 100-240V~ 50/60Hz 1.5A
C1/C2 Output: 5V3A, 9V3A, 15V3A, 20V3.5A (70W Max)
A1 Output: 5V3A, 9V2A, 10V2.25A, 12V1.5A (22.5W Max)
C1+C2 Output: 45W+20W
C1+A1 Output: 45W+22.5W
C2+A1 Output: 10W+10W
C1+C2+A1 Output: 45W+10W+10W
Max Output: 70W Max
Manufacturer: Shenzhen Fractal Exploration Technology Co., Ltd.
Made in China
This product has passed CCC certification.
Close-up of the foldable new national standard pins.
Using the included data cable to connect to an iPhone 18 Pro Max enables instant Apple device identification, directly displaying the iPhone 18 Pro Max model name, real-time charging power, and current phone battery level, making the charging status clear at a glance.
Product Dimensions and Weight
Measured by calipers, the length of the charger body is 54.49mm.
Measured width of the charger body is 34.63mm.
Measured height of the charger body is 43.50mm.
Measured by electronic scale, the weight of the charger is approximately 120.7g.
Compared to the original Apple 70W charger, this HIGHSAY product is visibly more compact in volume.
Held in an adult's palm, the size of the charger is as shown in the figure.
Product Fast Charging Protocol Test
Using POWER-Z KM003C to read the built-in E-Marker chip of the included C to C braided cable, it supports 50V 5A 240W EPR power delivery capability, with USB 2.0 data transmission specifications.
Using POWER-Z KM003C, the charger's USB-C1 port was measured to support QC3.0, AFC, PD3.0/PPS, QC5, DCP, and Apple 2.4A charging protocols.
PDO messages show that the USB-C1 port has four fixed voltage levels: 5V3A, 9V3A, 15V3A,20V3.5A, and two PPS voltage ranges: 5.00-11.00V 5.00A and 5.00-21.00V 3.30A.
The USB-C2 port was measured to support QC3.0, FCP, SCP, AFC, PD3.0, PPS, QC5, DCP, and Apple 2.4A charging protocols.
PDO messages show that the USB-C2 port also has four fixed voltage levels: 5V3A, 9V3A, 15V3A, 20V3.5A, and two PPS voltage ranges: 5.00-11.00V 5.00A and 5.00-21.00V 3.30A.
The USB-A port was measured to support QC3.0, FCP, SCP, AFC, and DCP protocols.
In actual charging of an iPhone 18 Pro Max, the product was observed to actually support PD3.2 SPR AVS, with a voltage of 17.79V, current of 2.89A, and power of 51.47W.
Product Smart Display Interaction
When powered on without any load connected, the charger's smart display interaction screen automatically lights up, showing a current total power of 0W.
When an iPhone 18 Pro Max is connected to the C1 port for charging, it identifies the current model and synchronously displays the current battery level and power.
When multiple devices are connected for charging, the total power interface refreshes in real-time to show a current total output power of 60.6W. Meanwhile, users can long-press the touch button for 2 seconds to rotate the screen display direction, making usage more convenient.
Single-clicking the touch button switches to the multi-port independent monitoring interface, where the screen displays the real-time status of the C1, C2, and A ports in separate columns: The C1 port identifies the connected device as iPhone 18 Pro Max, synchronously displaying current battery level and power; The C2 port shows charging at 17.1W; The A port shows idle at 00.0W.
Clicking the touch button again switches the interface, allowing the charger to detect and display the specification grade of the currently connected data cable in real-time, helping users quickly troubleshoot whether fast charging speed is affected by cable specification limitations.
Product PCBA Full View Analysis
First, pry open the outer cover of the screen along the edge of the black glossy panel at the top of the body. The cover is fixed by a snap-fit structure, with circular conductive copper foil and buffer foam pasted on the inner side corresponding to the touch button.
The product has an independent display driver sub-board, connected to the screen via an FPC ribbon connector, with a spiral metal touch spring welded underneath, which contacts the copper foil on the inner side of the cover to achieve touch interaction.
Pull the internal PCBA module out of the housing. The module is wrapped with high-temperature tape for insulation externally, with brass heat sinks on both sides, and covered with gray thermal adhesive on top, serving to fix and dissipate heat, quickly conducting heat to the outer shell.
Measured by calipers, the length of the PCBA module is 50.13mm.
Measured width of the PCBA module is 29.08mm.
Measured height of the PCBA module is 37.74mm.
Remove the brass heat sinks from both sides.
The PCBA module adopts a stacked design of multiple sub-boards, consisting of a bottom transformer sub-board, input filter sub-board, synchronous rectification sub-board, output sub-board, and display screen driver sub-board.
Inside the PCBA module, four high-voltage filtering electrolytic capacitors and two switching transformers are tightly arranged; the synchronous rectification sub-board below directly receives the secondary winding leads from the two transformers, with two synchronous rectification MOSFETs welded on the board, and large-area exposed copper tinned processing applied at high-current wiring points.
View of the back of the PCBA mainboard, with obvious safety distance between primary and secondary sides. Two Injoinic co-packaged GaN power chips are integrated on the primary side, and two safety Y-capacitors and two feedback optocouplers bridge the primary and secondary sides.
An input filter sub-board is set at the input end of the module, with the right side used for contacting the pin springs to draw power.
View of the other side, from left to right, you can see the input NTC thermistor, temperature switch, two high-voltage filtering electrolytic capacitors, and the output USB-A female socket, etc.
Three output interface female sockets are sequentially welded on the interface sub-board vertically soldered at the output end of the module.
Removing the input filter sub-board, its front side contains a time-delay fuse, yellow safety X2 capacitor, green magnetic ring common-mode inductor, temperature switch, and black NTC thermistor.
A rectifier bridge is welded on the back.
On the left side of the transformer sub-board front, there are three purple high-voltage filtering electrolytic capacitors and one bobbin differential mode inductor, plus one removed black high-voltage capacitor. Two transformers are arranged on the right side.
The back of the transformer sub-board contains Injoinic co-packaged GaN chips, as well as SMD Y-capacitors and optocouplers.
One side of the synchronous rectification sub-board contains the synchronous rectification chip and output filtering capacitors.
The other side of the synchronous rectification sub-board contains the synchronous rectification transistors.
One side of the output sub-board contains VBUS transistors.
The other side contains the Injoinic protocol chip and NTC thermistors for temperature sampling.
The front of the screen driver sub-board welds a touch spring, FPC screen ribbon connector, one MCU microcontroller, and one Flash memory chip.
The back of the screen driver sub-board contains a touch chip and SMD NTC thermistors for internal temperature sampling.
Close-up of the display module is as shown in the figure.
Overall, it can be seen that this HIGHSAY 70W Smart Display GaN Charger adopts a dual-channel independent QR+SR power architecture. Two Injoinic co-packaged GaN master control chips drive one large and one small transformer respectively, followed by two independent synchronous rectification outputs, and then achieved three-port output through a protocol chip. This dual-channel flyback architecture eliminates the need for traditional secondary synchronous buck circuits, reducing second-stage conversion losses and heat generation.
Product Primary Side Circuit Analysis
The input time-delay fuse comes from LB Lanbao, used for overcurrent protection at the input end.
An NTC thermistor is set at the input end to suppress surge currents.
A temperature switch from HAK Huakaiwei, model HKW9700, with an operating temperature of 65°C, used for over-temperature protection.
The safety X2 capacitor comes from DGCX Dongguan Chengxi, with a specification of 0.22μF, used to filter differential mode interference.
The common-mode inductor uses a green magnetic ring with double-wire parallel winding, fixed with black glue in the center, used to filter EMI common-mode interference.
A bobbin inductor, insulated with a black heat shrink tube on the outside.
The rectifier bridge comes from PY Pingwei, model TBM810, with specifications of 8A 1000V, adopting a TBM thin SMD package.
A high-voltage filtering capacitor comes from JK Junkang, with a specification of 400V 47μF.
The second purple high-voltage filtering electrolytic capacitor also comes from Junkang, with a specification of 400V 18μF.
The third purple high-voltage filtering electrolytic capacitor comes from Junkang, with a specification of 400V 10μF.
The fourth black high-voltage filtering electrolytic capacitor comes from JSH Wanjingyuan, with a specification of 400V 33μF.
The capacitor supplying power to the master control chip has a specification of 100V 4.7μF.
One channel's primary master control chip adopts INJOINIC IP2075_38D, which is a GAN FET integrated high-performance multi-mode AC/DC flyback controller. It features adaptive multi-mode control (MMC) and secondary side regulation (SSR) functions, suitable for applications requiring high power density and high precision output voltage/current.
Furthermore, when AC input is removed, the HV pin is used for X-cap discharge, helping to reduce Xcap discharge loss and achieve extremely low standby power consumption. Combining frequency folding and valley switching technologies, it achieves high efficiency by reducing switching losses. By adding frequency modulation, it significantly reduces EMI radiation and common-mode noise.
The IP2075_38D has a wide adaptive switching frequency range, improving light-load efficiency. The maximum operating frequency is optimized to minimize device temperature and improve full-load efficiency. The minimum peak current is also optimized to balance standby power consumption and audio noise.
The IP2075_38D enters burst mode under light-load or no-load output conditions. In this mode, it has an extremely low operating current (160µA), significantly reducing standby power consumption to meet the most stringent energy efficiency standards such as CoC V5 and DoE VI.
The IP2075_38D also features comprehensive protection functions and rich customizable configuration parameters, such as maximum frequency, output over-voltage protection, output under-voltage protection, Brown-in/Brown-out, over-temperature protection, and compensated over-power protection. It adopts a DFN18L(6*8) package.
The other channel's primary master control chip adopts Injoinic IP2075_34S. This chip is a high-performance, highly integrated offline AC/DC primary-side flyback controller. Internally, it integrates a gallium nitride power transistor with a withstand voltage of up to 700V and a high-voltage startup circuit. It adopts a standard ESOP8 package, significantly simplifying peripheral component count and reducing PCB footprint.
This chip supports adaptive multi-mode control (MMC) and secondary side regulation (SSR), designed specifically for mobile device fast charging adapters like phones, tablets, and laptops, as well as high power density, high-efficiency flyback auxiliary power supplies.
The IP2075_34S has built-in adaptive multi-mode control technology. Under low-voltage input, it uses full-range PFM+PWM mode; under high-voltage input, it combines light-load PFM and heavy-load quasi-resonant QR valley-locking turn-on technology, effectively reducing switching losses and device temperature rise. During light-load and no-load, it automatically switches to burst mode with an operating current of only 160µA, achieving extremely low standby power consumption and easily meeting CoC V5 and DoE VI energy efficiency requirements.
Additionally, the chip has built-in frequency dithering to effectively suppress EMI and common-mode noise, and integrates comprehensive protection mechanisms such as Brown-in/Brown-out, input/output over-voltage protection, output under-voltage and short-circuit protection, cycle-by-cycle current limiting, compensated over-power protection, and over-temperature protection. It supports customization of multiple key parameters, balancing high conversion efficiency, system stability, and safety.
One channel's transformer is ink-jet coded ATQ18-GP0734-02.
The other channel's transformer is ink-jet coded ATQ19-GP0734.
An optocoupler with silk-screen marking OR1008.
Another optocoupler with silk-screen marking OR357.
Two SMD Y-capacitors with silk-screen marking CT7E102M.
Secondary Side Circuit Analysis
Both synchronous rectification chips built into the product are Injoinic IP2008, adopting SOT23-6 package, widely used in adapter, QC, and USB PD fast charging power supplies.
This chip supports a wide output voltage range of 3.3V~21V, compatible with high-side and low-side rectification, and can operate in DCM and quasi-resonant modes. Its internal self-powered regulation circuit allows normal operation without additional auxiliary winding power supply. Combined with extremely low static current of 100μA and minimal peripheral component requirements, it effectively reduces overall BOM cost and shrinks PCB footprint.
This chip precisely detects the drain-source voltage of the synchronous rectification MOSFET to output drive signals, replacing traditional Schottky diodes to reduce secondary side conduction losses and operating temperature rise.
In terms of turn-off control, the IP2008 features -40mV pre-turn-off functionality. As the secondary demagnetization current decreases, it adjusts the conduction voltage drop to about 40mV by lowering the gate drive voltage, and achieves an extremely fast turn-off delay of about 30ns when the current reverses.
Meanwhile, the chip has built-in configurable VDS slew rate detection and turn-on/turn-off blanking circuits, which can effectively suppress resonant ringing in DCM and quasi-resonant modes, preventing false turn-on of power transistors, and improving system operational stability.
The other channel's Injoinic IP2008, totaling two chips.
All synchronous rectification transistors built into the product are JieJie Microelectronics JMSL1009PG, with a withstand voltage of 100V, on-resistance of 5.6mΩ, adopting PDFN5*6 package.
The other channel's synchronous rectification transistor is also JieJie Microelectronics JMSL1009PG, totaling two.
The protocol chip built into the product also comes from Injoinic, model IP2759. This chip integrates three independent Type-C protocol controllers, supporting USB PD 2.0, PD 3.2, PPS, and EPR 28V, and is compatible with E-Marker cable identification. The chip has passed USB-IF PD with PPS certification, with TID 15935.
Besides USB PD, the IP2759 also supports QC5, QC4+, QC3+, QC3.0, QC2.0, FCP, SCP, AFC, SFCP, MTK PE+ 2.0/1.1, UFCS, Apple 2.4A, BC1.2, and Samsung 2.0A protocols, compatible with different brands of smartphones, tablets, and other digital devices.
The IP2759 integrates three independent programmable voltage loops, three independent programmable current loops, and three high-side current detections, allowing independent sampling and adjustment of output voltage and current for each port. The chip supports line loss compensation and can control the front-end power conversion circuit via PWM controller feedback, optocoupler anode driving, or I²C interface.
In terms of power path control, the IP2759 integrates six independent NMOS drivers and three NMOS differential pressure detections, flexibly switching the connection relationship between the power path and USB ports. The chip also has automatic discharge functionality, rapidly releasing residual voltage when output voltage steps down or ports are closed, ensuring safe plug/unplug operations.
For three-port chargers, the IP2759 adapts to various mainstream power architectures. With one AC-DC channel and two BUCK channels, it enables single-port direct-through AC-DC full-power output; with one large and one small AC-DC channel, it supports maximum power output on any dual-port combination; with two AC-DC channels, it achieves current sharing between the two power sources in single-port operation state.
The product integrates five Eternal Yiyuan MOSFETs, model ET6302, NMOS transistors with 30V withstand voltage, on-resistance as low as 5mΩ, adopting PDFN3333 package, responsible for merging/splitting switching of the two power paths and VBUS control of the 2C1A three ports. Four of them are shown in the figure above.
The other Yiyuan ET6302 is shown in the figure.
Two output filtering capacitors come from Koshin Dongjia, with specifications of 25V 680μF.
The MCU on the screen driver sub-board comes from PUYA Puran, model PY32F410, adopting QFN32 package, responsible for collecting charging parameters of each port, identifying device information, monitoring temperature, and driving color screen display and responding to screen operations.
The memory chip next to the MCU also comes from PUYA Puran, model P25Q32SH, a 32Mbit 4MB NOR Flash chip adopting SOP-8 package, used for storing firmware information.
A touch chip comes from RONGHE Ronghe, model RH6016C, adopting SOT23-6 package.
A chip with silk-screen marking HAJAJ.
All disassembly completed, here is a group photo.
Chongdiantou Summary
Finally, attached is the product bill of materials for easy reference.
The HIGHSAY C3 Pro 70W Smart Display GaN Charger is equipped with three ports (2C1A). Both USB-C ports support 70W blind-insertion output. Actual testing showed charging power exceeding 51W for the iPhone 18 Pro Max. Its smart display screen intuitively shows the specific device model and real-time battery level. Combined with single-click screen switching and long-press rotation touch interactions, it meets the needs of geek users.
Through teardown analysis, Chongdiantou learned that the interior of the HIGHSAY C3 Pro adopts a two-channel independent switched-mode power supply design, with all power chips coming from Injoinic.
Specifically, the two primary master control chips adopt Injoinic IP2075_38D and IP2075T_34S co-packaged GaN chips. The secondary side uses two Injoinic IP2008 synchronous rectification controllers paired with two JieJie Microelectronics JMSL1009PG synchronous rectification MOSFETs. The output end uses the Injoinic IP2759 protocol chip paired with five Yiyuan ET6302 switching transistors to achieve intelligent dual-path power distribution output.
The built-in smart display module is independently driven by the PUYA PY32F410 MCU and PUYA P25Q32SH memory.
Primary filtering uses three Junkang and one Wanjingyuan capacitors totaling 108μF high-voltage electrolytic capacitors. The input end is equipped with a Lanbao fuse and Huakaiwei HKW9700 temperature switch. Combined with internal multi-channel NTC thermistors, large-area brass heat sinks, casing heat dissipation copper foil, and composite thermal silicone pads, it constitutes a triple temperature control system with soft-hardware synergy. The overall structure is compact, materials are solid, and safety protections are thorough.