Disassembly report: NVC NVC 65W 1A1C fast charge 86 panel N25
Preface
NVC Lighting is a full industry chain lighting brand enterprise integrating brand, R&D, design, production, marketing and service. It adheres to independent innovation and leads the development of the industry. It has hundreds of industry patented technologies and standards, as well as design awards. The products are stationed in many national landmarks, providing intelligent, healthy and humanized lighting solutions.
Charging Head Network purchased an 86 fast charging panel launched by NVC Electric. This fast charging panel has a 1C1A output interface and a total output power of 65W . The USB-C port supports 65W output power and the USB-A port supports 30W output power. , convenient for charging mobile phones and laptops. Let’s take a look at the disassembly of this fast charging panel and take a look at the internal design and materials.
NVC Electrician 65W fast charging 86 panel appearance
The NVC 65W fast charging 86 panel belongs to the N25 series and is also packaged in a transparent plastic bag.
The package contains the NVC 65W fast charging 86 panel, two fixing screws and an instruction manual.
The instruction manual contains detailed features, technical parameters and precautions of the product.
The front of the NVC 65W fast charging 86 panel is covered with a black matte decorative plate, and the words NVC NVC Electrician are printed on the lower left corner. Compared with the previously disassembled NVC 20W fast charging 86 panel, this one is purely equipped with 1A1C dual USB interfaces, with the corresponding name and maximum output power printed next to the interface.
Product specifications are printed on the back of the fuselage.
Input: 200-240V~50/60Hz 1.2A
USB single port output:
USB-A: 5V3A, 9V3A, 12V2.5A
USB-C: 5V3A, 9V3A, 12V3A, 15V3A, 20V3.25A
USB-C (PPS): 3.3-21V3A
USB dual port output:
USB-A: 5V2.4A
USB-C: 5V3A, 9V3A, 12V3A, 15V3A, 20V2.25A
The product has passed CCC certification.
The fuselage shell is fixed by snap packaging.
There are heat dissipation holes on the side to help the internal module dissipate heat and prevent heat accumulation from affecting the actual use experience.
Close-up of the live and neutral wire connections.
Power on the NVC 65W fast charging 86 panel and use ChargerLAB POWER-Z KM003C to measure that the USB-C port supports FCP, SCP, AFC, QC3.0/5, PD3.0, PPS, DCP, and Apple 2.4A charging protocols.
The PDO message shows that the USB-C port also has five sets of fixed voltage levels: 5V3A, 9V3A, 12V3A, 15V3A, and 20V3.25A, as well as a set of PPS voltage levels of 3.3-21V3A.
It is measured that the USB-A port supports Apple 2.4A, Samsung 5V2A, DCP, QC2.0/3.0, AFC, FCP, and SCP charging protocols.
Disassembly of NVC 65W fast charging 86 panel
After reading the appearance and testing of NVC’s 86 panel, let’s dismantle it and take a look at the internal solutions and materials.
The design of this fast charging 86 panel is the same as the traditional 86 socket panel. The panel is pried off from the edge.
The panel cover is made of PC material.
The inside of the panel is at a glance. There are mounting holes, and the internal fast charging module is fixedly connected through buckles.
The internal module cover is also made of PC material.
Remove the cover of the internal module. Under the cover is the fast-charging PCBA module.
Overview of the fast charging PCBA module. The interior is a square PCB, which fits the shell design.
Take out the PCBA module inside the casing.
The PCBA module is composed of two PCBs welded together, with positioning pillar supports on the edges.
Weld the input filter and switching power supply parts on the front side of the PCBA module.
The other side is the output circuit, soldering protocol chip and USB socket.
Close-up of the pin header connecting two PCBs.
The transformer secondary coil is soldered to the output PCB.
A blue Y capacitor is also soldered between the two PCBs.
Solder and separate the two PCBs and continue disassembly.
An overview of the primary switching power supply board, with welded terminals, fuses, and NTC thermistors in the upper right corner. Solder the common mode inductor and safety X2 capacitor to the left. The high-voltage filter capacitor and differential mode inductor are welded in the lower left corner, and the transformer is welded in the lower right corner. The thermal pad and heat sink in the middle are fixed with thermal conductive glue to dissipate heat for the gallium nitride switch tube.
The rectifier bridge and gallium nitride main control chip are welded on the back, and copper and tin are exposed at the position corresponding to the gallium nitride switch tube to increase the heat dissipation area.
The input wires are connected using brass binding posts.
The input fuse specification is 3.15A 250V.
Green NTC thermistor is used to suppress the inrush current on power-up.
Safety X2 capacitors are from WQC Weiqing Electronics.
Specification is 0.1μF.
Weld a rectifier bridge on each side of the PCB and connect the half bridges to evenly distribute the heat.
The rectifier bridge is from Jingheng, model RJBF410, specification is 4A 1000V, it is a fast recovery rectifier bridge.
Weld the high-voltage filter capacitor and differential mode inductor on the side of the PCBA module. The high-voltage filter capacitors are from Yongming, the specification is 33μF400V, and the total capacity of 4 pieces is 132μF.
The main control chip uses ON Semiconductor NCP1342, which is a high-frequency flyback quasi-resonant primary PWM controller with built-in active X2 capacitor discharge, supports wide-range Vcc power supply, supports external thermistor for overheating protection and multiple complete protection functions.
The gallium nitride switch tube uses thermal pads and heat sinks to dissipate heat, and the heat sinks are fixed with glue.
Under the thermal pad is the gallium nitride switch tube.
The gallium nitride switch tube is Innosec INN650D190A, which is an enhanced gallium nitride high-voltage single tube with a voltage resistance of 650V, a conduction resistance of 190mΩ, and a DFN8*8 package. It supports ultra-high switching frequency, has no reverse recovery charge, has extremely low gate charge and output charge, meets the industrial application requirements of JEDEC standards, has built-in ESD protection, and complies with RoHS, lead-free, and EU REACH regulations.
Innosec INN650D190A data information.
The dismantling of the charging head network has learned that Innosec’s gallium nitride chips have been used by Samsung, OPPO, VIVO, Lenovo , Yadi, LG, ASUS , Anker, Nubia , Baseus , Greenlink , Sanji , etc. Used by many well-known brands and manufacturers , shipments exceeded 300 million units.
The corresponding backside of the gallium nitride switch tube is exposed with copper and tin to enhance heat dissipation performance.
The filter capacitor that supplies power to the main control chip comes from Aihua, with a specification of 100V10μF.
The transformer core is wrapped with tape for shielding.
The other PCB is used for rectifying and filtering the output, welding the synchronous rectification controller, synchronous rectifier tube, protocol chip, synchronous buck converter, feedback optocoupler and chip Y capacitor.
Solder a blue Y capacitor on the back and connect it to the primary board.
The blue Y capacitor is from STE Matsuda Electronics.
SMD Y capacitors are from Sichuan Teruixiang Technology Co., Ltd. They are small in size and light in weight, and are very suitable for use in high-density power products such as gallium nitride fast charging. The material number is TMY1102M.
Teruixiang focuses on the R&D, production and sales of passive components, with a registered capital of 100 million yuan. It has two types of independent capacitor brands: SMD TRX and DIP TY capacitors. TRX will be committed to the research of ceramic materials to expand more categories of applications and provide customers with more solutions.
Charging Head Network learned that Teruixiang SMD Y capacitors are not only certified by Baseus Qualcomm QC5 for 100W gallium nitride fast charging , Maiduoduo 100W gallium nitride , OPPO 65W super flash charging gallium nitride charger , and Lenovo 90W gallium nitride In addition to fast charging , Nubia 65W gallium nitride charger , Baseus 120W gallium nitride + silicon carbide PD fast charging charger and other dozens of high-power chargers, it can also be used in Hailutong , First Guardian , Belkin The performance of other brands’ 20W mini fast charging has been unanimously recognized by customers .
Everlight EL1019 optocoupler is used for output voltage feedback.
The 431 voltage reference is used for output voltage regulation control.
The synchronous rectification controller is silk-printed IBHJN, the actual model is MP6908A, from MPS Core Source Semiconductor, the maximum operating frequency is 600KHz. Supports multiple working modes of DCM, CCM, QR, and ACF, supports high-side and low-side applications, and has ringing detection to prevent accidental activation.
The synchronous rectifier is from Ruijun Semiconductor, model RUH120N90M. It is an NMOS with a voltage resistance of 120V, a conduction resistance of 6.2mΩ, and a PDFN5060 package.
The filter capacitor comes from Xinruilong, which is an E2 series solid capacitor with a specification of 470μF 25V. Two of them are connected in parallel.
The protocol chip uses Yingjixin IP2726, which is a protocol chip that is widely used. Yingjixin IP2726 is a fast charging IC that integrates multiple protocols and is used for USB output ports. It supports Type-C DFP, PD2.0/3.0, PPS, QC4+, QC2.0/3.0, FCP, AFC, SCP, MTK PE+, Apple2.4A, BC1.2 and Samsung 2A protocols. With high integration and rich functions, only a few peripheral components are needed during application, effectively reducing the size of the overall solution and reducing BOM cost.
Charging Head Network learned that Yingjixin IP2726 has passed Qualcomm QC4+ certification and obtained the first QC4+ certification certificate in mainland China.
Charging Head Network learned that Yingjixin IP2726 has been used by Bull 140W 3C1A gallium nitride fast charging socket , MOMAX 140W 2C1A gallium nitride charger , mophie 120W 3C1A four-port gallium nitride desktop charger , and Redmi Note12 Discovery Edition original 210W Gallium nitride charger , Lenovo thinkplus mini 65W gallium nitride charger and other major brand products are adopted, and the chip performance and quality are highly recognized by customers.
The VBUS switch tube comes from Guanyu, model KS3218MB, is an NMOS with a voltage resistance of 30V, a conduction resistance of 7mΩ, and is packaged in PDFN3333.
The buck converter for the USB-A port comes from Silicon Power. The model SP1231FL is a synchronous buck converter with a built-in switching tube. The chip has ultra-low standby power consumption, has a 66mV current sampling reference, and the switching frequency supports 60kHz- 1MHz setting, built-in adjustable line loss compensation, supports 100% duty cycle, supports constant voltage and constant current control, and adopts SOP8L package.
Silicon Power SP1231FL data information.
The output filter capacitor comes from Emerald, which is a BC series solid capacitor with a specification of 220μF 25V.
Take a look at all the disassembly and take a family photo.
Summary of disassembly of charging head network
NVC Electrician’s fast charging 86 panel has a 1A1C fast charging interface and can be installed inside the wall like a traditional socket panel. The USB-C interface supports 65W output, and the USB-A interface supports 30W output. When in use, you can directly connect the data cable to charge your laptop or mobile phone, eliminating the trouble of finding a socket to connect the charger.
Charging Head Network learned through disassembly that NVC’s fast charging panel is composed of two PCBs welded together, one of which is a switching power supply and the other is for synchronous rectification and protocol functions. The primary level uses ON Semiconductor NCP1342 main control chip, paired with Innosec INN650D190A gallium nitride switch tube. The synchronous rectification adopts MPS MP6908A synchronous rectification chip and Ruijun RUH120N90M synchronous rectifier tube.
The output uses Yingjixin IP2726 protocol chip for USB-C and USB-A interfaces. The USB-A port uses the Silicon Power SP1231 synchronous buck converter for simultaneous output of the USB-C port and USB-A port. USB-A port voltage reduction. The gallium nitride switch tube is attached with a thermal pad and a heat sink for heat dissipation. The internal high-voltage filter capacitor is from Yongming, and the output solid-state capacitor is from Emerald and Xinruilong. The overall design and materials are good.
