preface
VAVA is Amazon cross-border big seller Zebao brand, VAVA launched an all-in-one docking station VA-DK001, this docking station supports wireless charging function, support video output and card reader and USB interface expansion, suitable for use in the office, can also be used at home, for notebook users to provide video expansion and storage expansion, and for mobile phone wireless charging, is a convenient and practical docking station products.
The charging head network has obtained this docking station, and the following will be a detailed disassembly of this docking station to see how so many functions are realized, and which manufacturers' devices are used internally.
The VAVA multi-function docking station is out of the box
The box is based in silver gray, looks very metallic, and the front is printed with the VAVA brand and the name - USB-C DOCKING STATION.
The product parameters are printed on the back, the model is VA-DK001, made in China, and has passed the FCC, CE, RoHS certification.
The package contains a docking station, power adapter, and power cord.
There are also instructions and thank you cards.
The VAVA docking station adopts a hexagonal three-dimensional body design, which is very unique, and not only comes with a USB-C cable and multi-function interface, but also supports wireless charging.
The fuselage is flanked by a metal casing with a brand logo carved in the center.
Close-up of the top power button.
The front of the fuselage is equipped with an L-shaped metal support plate for wireless charging of the mobile phone.
The phone can be charged wirelessly.
The horizontal display of the mobile phone can also be charged wirelessly, improving the user's experience while charging.
There are blue mood lights on the bottom of the docking station and two USB-A ports on the front.
A lightning bolt logo is printed next to the interface, indicating that the two interfaces are charging interfaces.
Both USB-A ports are measured using the ChargerLAB POWER-Z KT002 to support the Apple 2.4A protocol.
The bottom is pasted with the product nameplate sticker, support 20V6A input and maximum 120W output, the product has passed the FCC, CE, RoHS certification.
The back housing of the fuselage is equipped with heat dissipation holes to effectively avoid heat accumulation inside the docking station, and there are also multiple functional interfaces.
List of functional interfaces, including two HDMI interfaces, four USB-A data transmission interfaces, RJ45 network cable sockets, 3.5mm headphone sockets, SD card slots, and USB-C ports.
In addition, there is a DC input interface below, which supports 20V input and is used with the original power supply.
The four USB-A ports on the measured back do not support any charging protocol.
The USB-C interface also does not support any charging protocol, that is, the five USB interfaces on the back of the docking station are data transmission interfaces, and the USB-C cable supports 120W fast charging.
VAVA multi-function docking station disassembly
After having a basic understanding of vava's multi-functional docking station, let's continue to disassemble it and see how the internal materials work.
First unscrew the retention screws from the bottom and remove the docking station base.
Remove the white LED mood light.
The interior is bent with a light bar to fit the ambient light housing model.
Next, disassemble the shells on both sides of the docking station, which is made of aluminum alloy and secured with glue.
An aluminum heatsink is attached to the position of the wireless charging coil inside the docking station.
Remove the shielded iron sheet of the internal PCBA module, expose the fixing screws, and continue with the disassembly.
Unscrew the retention screws and detach the docking station housing.
The USB-A charging board is screwed to a separate enclosure.
Unscrew the fixing screws and remove the USB-A charging clip.
The USB-A female seat, overcurrent protection chip and automatic protocol chip are soldered on the small board.
The overcurrent protection chip from Silicon Jie, silk screen printed Ln, the actual model is SY6282, is an ultra-low internal resistance load switch, supporting programmable current limit.
The automatic protocol recognition chip is from SELWEI, model CW3005F, for two USB-A interface protocol recognition.
There are no soldered elements on the back of the board.
The wireless charging coil covers a cover, remove the cover, and below it is the wireless charging coil.
The wireless charging coil is pasted with a temperature-sensing thermistor probe in the middle.
Close-up of thermistor probe.
Remove the wireless charging module, and the back of the module is heat dissipated through the contact of the yellow thermal pad with the heat sink.
Remove the wireless charging module and heatsink.
The interior of the housing corresponds to the magnet that adsorbs the base.
Close-up of the yellow thermal pad.
Wireless charging PCBA module front glance, reserved Micro-USB interface, through the motherboard connection wire power supply.
The wireless charging module adopts the easy-to-punch wireless WP80024 wireless charging master control, the chip supports Qi-BPP 5W / 7.5W / Samsung 10W wireless charging protocol, the maximum efficiency of 12V input is 78%, the charging height is 3-8mm, and it has passed CE/FCC/Qi-EPP certification, integrating over-temperature protection, over-current protection, over-voltage protection, and foreign object detection functions.
Wireless charging master external 8.000MHz clock crystal.
The chip is equipped with two external FD2105M drivers for wireless charging power tube drive.
The wireless charging power tube is from Ruijun Semiconductor, model RU3030M2, NMOS, withstand voltage 30V, conductivity 10mΩ, available in PDFN3333 package.
Another set of wireless charging power tubes and corresponding drivers.
Five NPO resonant capacitors in parallel.
LM324 4 op amp for wireless charging signal demodulation.
MPS MP2229 synchronous buck chip for wireless charging fixed frequency regulation and buck, support 21V input, maximum output current 6A, built-in 40/18mΩ switch.
Filter inductance at the power supply input.
A voltage regulator chip from a micro-source semiconductor.
A silk screen printed S42BKD synchronous buck chip for powering the wireless charging master.
Multi-color LED indicator to indicate wireless charging status.
There is no component on the back of the wireless charging PCBA module, and two pieces of conductive cloth are pasted to the ground in contact with the aluminum plate.
A small plate is fixed inside the housing for touch operation.
The front of the plate is a touch electrode.
A touch chip is soldered on the back.
The touch chip comes from Fusion, model RH6041, which is a multi-channel touch sensor chip for detecting touch operations.
The dock PCBA module has multiple chips and corresponding interfaces soldered on the front.
There are also multiple chips on the back, and a small heatsink near the USB-A output wire.
The USB-C wire solder joints are welded with plastic frame fixing.
The back side is also fixed and welded with a plastic frame.
Remove the heat sink covering the front and back, and below is a buck-boost circuit to power the laptop output.
The buck-boost master controller adopts ON Semiconductor NCP81239, which is a wide-input, 4-tube H-bridge synchronous buck-boost controller, which adopts i2c bus voltage regulation and meets the power transmission specifications under USB PD. For USB-C interface output voltage control.
4R7 alloy inductors are used for buck-boost voltage conversion.
The step-up and drop-up circuit uses ON Semiconductor NTTFS4C10N switch tubes, screen printed 4C10, NMOS, withstand voltage 30V, conductivity 7.4mΩ, and is available in WDFN8 package.
The other two NTTFS4C10Ns, four of which make up the H bridge.
Close-up of the 5mΩ current sense resistor in a 2512 package.
The Fongbin electrolytic capacitor is used for output filtering and is 220μF 25V.
Large and medium SM4307 for USB-C pass-through function, PMOS, withstand voltage 30V, conductance 18mΩ, DFN5*6 package.
Two VBUS switch tubes from GuFeng, model G16N03A, two opposed series for VBUS switch control.
There is also a step-down circuit on the back of the PCBA module that dissipates heat through gluing and aluminum sheets.
Buck main control chip from silicon Jie, silk screen AVI, the actual model is SY8368A, is a 28V input, 8A continuous output current, 16A peak output current synchronous buck converter, the chip built-in buck switch tube, with fast transient response.
1R5 alloy inductors are used for buck output.
Dock interface close-up, in order of USB3.0 interface, USB-C interface, SD card reader, wired network port, USB2.0 interface and two HDMI interfaces.
SD card slot close-up, affixed with the MAC address of the wired lan port.
The STDP4320 conversion chip from MegaChips is used to extend the DP signal into two outputs, supporting both replication mode and extended mode.
Two Paradade PS8402A DP-to-HDMI conversion chips for converting two DP signals into HDMI signals, supporting the HDMI 1.4b standard, and integrated signal debouncing technology.
Parade PS8402A chip close-up.
The other PS8402A corresponds to two HDMI interfaces.
Wanghong MX25L2026D memory, 256KB capacity, for storing firmware and configuration information.
Weifeng Electronics VP230-T4 is used for USB-C interface control.
A 10mΩ resistor is used for output current sensing.
VL817-Q7, a USB 3.1 Gen1 4-port hub chip for internal USB 3.0 distribution in the docking station.
Wanghong MX25L512E memory is used to store firmware information.
Weifeng Electronics VL817-Q7, which is a USB 3.1 Gen1 4-port hub chip, through which continues to separate USB 3.0 5Gbps A port, card reader and other peripherals.
The VL212-Q4 is used for USB port expansion.
Realtek RTS5306E Card Reader Chip is a USB3.0 interface card reader chip for card reader function in the docking station.
Realtek ALC4040 audio codec chip for docking station audio output.
Realtek RTL8153B is used for docking network connectivity.
Screen printed SG24002 network isolation transformer.
Buck chip from Silicon Jie, silk screen printing AHI, the actual model is SY8204, is a 30V input, 4A output synchronous buck converter, internal integrated switch tube, with fast response capability.
6R8 alloy buck inductor.
Buck chip from MPS, silk screen IADJ, MP1470, is a 16V input, 2A output synchronous buck converter, internal integrated switch tube, fixed 500kHz switching frequency.
Matching magnetic rubber buck inductor.
The USB-A interface uses Silicon Jie's overcurrent protection chip, silk screen Ln, the actual model is SY6282, is an ultra-low internal resistance load switch, supporting programmable current limit.
Disassemble them all and take a family portrait.
Charging head net disassembly summary
VAVA launched this VA-DK001 docking station, support through the USB-C interface to connect to the notebook, connect the external power supply, provide USB PD power supply and interface expansion for the notebook, the docking station built-in two HDMI interfaces, expandable two screen display. The docking station has multiple USB ports for easy connection of storage devices and peripherals. And support wireless charging function, to achieve one-stop charging and expansion function implementation, simplify the desktop placement.
The charging head network learned through disassembly that the docking station internally uses The MEGAChips STDP4320 conversion chip converts the DP signal of the USB-C interface into two signals, and converts the two PS8402A channels into HDMI outputs. The internal power conversion of the docking station uses ON Semiconductor NCP81239 synchronous buck-boost controller, using Weifeng Electronics VP230 for PD interface control, two VL817 for interface distribution, and VL212 for interface expansion.
The docking station also uses several REALTEK resilient chips, of which the RTS5306E is used for the docking station reader adapter, the ALC4040 is used for the audio interface output, and the RTL8153B is used for wired network adapter. Two silicone stepp-down chips are also used inside the docking station for power supply inside the docking station. This full-featured docking station is a great helper for office notebooks.