With the widespread popularity of USB-C interface, PD fast charging has become the mainstream power supply method, and laptops and mobile phones use USB-C interface for power supply. Generally speaking, a combination of power strips, chargers and data cables is used, and there are also ways to use wall sockets with chargers.
For a fixed office location, you can use the 86 fast charging panel with 65W high power instead of a charger and directly connect the data cable for charging, which is more neat and beautiful. The charging head network summarizes the disassembly of the 86 panels of the fast charging output, and the three panels all have multi-port fast charging outputs, let's take a look at the internal scheme.
ABB, the world's top 500 high-end switch brand, has developed a new four-digit output USB charging socket according to market demand, combined with the advantages of ABB brand, the appearance of the product continues the square shape of the traditional wall socket, equipped with 2A2C four USB interfaces, only one data cable can be charged, which is very convenient.
Through the dismantling of the charging head network, it was found that the ABB four-digit output USB charging socket adopts a three-way circuit design, which can be said to be a collection of three chargers. And the design of the two USB-C circuits is exactly the same, and the symmetry is very obvious.
Two USB-C circuits, the switching power supply part is Lishengmei LN9T33HV+LN5S21A, which has a high degree of integration; Then the output voltage is controlled by Hynetek USB PD protocol chip HUSB350. The USB-A circuit adopts the Xinpeng micro PN8370+PN8306 scheme to fix the 5V voltage output. Thanks to the use of two sets of highly integrated solutions and a reasonable layout, the board still looks very simple even with three integrated circuits.
Related reading: 1. Teardown report: ABB four-digit USB output 18W PD fast charging socket.
LiPro's fast charging panel comes with a 2C1A interface, which replaces the traditional charger and can be directly plugged in to charge the mobile phone, which is greatly convenient for consumers. At the same time, the support of gallium nitride technology improves the power density, and achieves an output power of 65W in the limited space of the socket box, which meets the charging needs of notebooks and mobile phones.
Through the dismantling of the charging head network, it is learned that the inside of this fast charging panel is connected by two layers of PCB soldering, which correspond to the step-down module and the power module. Thermal pads and heat sinks are pasted on the back of the PCB, and the power module adopts a potting process to enhance heat dissipation ability and weather resistance. The power module is composed of ON NCP1342 main controller, Navitas NV6117 GaN power IC, MPS MP6908A synchronous rectifier controller and Bandai synchronous rectifier tube.
The step-down module adopts three-way Zhirong SW3518S with synchronous step-down tube and step-down inductor to form three independent step-down circuits, which can support 65W output corresponding to the three interfaces. The compact internal layout of the fast charging panel makes full use of the space, reducing the overall volume and making charging more convenient.
Related reading: 1. Teardown report: Meizu LiPro 65W 2C1A gallium nitride 86 panel.
NVC Electrician's Quick Charge 86 panel has a 1A1C fast charging interface, which 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, which can be directly connected to the data cable to charge the laptop or mobile phone when in use, eliminating the trouble of finding an outlet to connect the charger.
Through the dismantling of the charging head network, it was learned that the NVC fast charging panel is composed of two PCB soldering, one of which is a switching power supply, and the other is synchronous rectification and protocol function. The primary is onsemi NCP1342 main control chip, with Innoscience INN650D190A gallium nitride switch tube. The synchronous rectification adopts the MPS MP6908A synchronous rectifier chip and the Ruijun RUH120N90M synchronous rectifier tube.
The output adopts Yingjixin IP2726 protocol chip, which is used for USB-C and USB-A interface, and the USB-A port uses silicon power SP1231 synchronous step-down converter for USB-C port and USB-A port when the output is at the same time, it is a USB-A port step-down. The gallium nitride switch tube is pasted with thermal pads and heat sinks for heat dissipation, the internal high-voltage filter capacitor is from Yongming, and the output solid-state capacitor is from Emerald and New Ruilong, and the overall design and materials are good.
Related reading: 1. Teardown report: NVC Electric 65W 1A1C fast charge 86 panel N25
The three 86 fast charging panels summarized this time are all 86 panels that only support fast charging output and do not support AC output, of which ABB fast charging panel is a built-in three-way independent circuit, two USB-C interfaces and USB-A interfaces output independently, and a single USB-C interface supports 18W output. The two 65W fast charging panels of Meizu and NVC both use gallium nitride devices to improve conversion efficiency.
Both 65W fast charging panels use a flyback switching power supply with a synchronous step-down circuit, which is the same as the GaN charger solution and can get the same experience. For the occasion of fixed use of the charger, using the 86 fast charging panel instead of the charger is equivalent to hiding the charger inside the wall, which can get a cleaner and tidier experience.