Introduction

Today, we are tearing down the thinkplus FLUXO GaN Desktop Charging Station. It features three AC outlets, three USB-C ports, and one USB-A port. The USB-C ports support up to 140W output, with a total combined output power of 150W and automatic power allocation.

The AC outlets are equipped with overcurrent protection and surge protection. The charging station also includes customizable RGB lighting, which can be controlled via a touch-sensitive button. Next, through a detailed teardown, we will take a closer look at its internal design and component selection.

Product Appearance

The front of the packaging box features the thinkplus branding, along with a product image and the product name.

The top of the packaging box is printed with “thinkplus”.

The packaging highlights the devices supported by the charging station.

This side displays the specification information.

The package includes the desktop charging station, a USB-C cable, and a user manual.

The included USB-C charging cable is secured with a hook-and-loop strap.

Dual USB-C design with matte-finished connectors for easy plugging and unplugging.

The length of the cable is about 150 cm (59.055 inches).

ChargerLAB POWER-Z KM003C shows that it is equipped with an E-Marker chip and has a power transmission capability of 50V 5A.

The desktop charging station has a power cord featuring a built-in three-prong plug.

The top is equipped with three five-outlet sockets.

The sockets feature a semi-transparent design with built-in safety shutters, and the reset spring is visible inside.

The edges of the sockets are labeled with a maximum power rating of 2500W.

The front features a touch button and USB ports.

The touch button is used for controlling the socket switch and lighting.

A view of the side of the device.

The connection between the power cord and the main body is equipped with a rubber sleeve for bend and strain relief.

The bottom of the device is printed with parameter information and fitted with anti-slip pads.

Model: CSFO150A4

AC Input: 100-240V~ 50/60Hz 2.3A Max

Output:

USB-C1/C2: 5V⎓3A, 9V⎓3A, 15V⎓3A, 20V⎓7A, 28V⎓5A (140W Max)

USB-C3: 5V⎓3A, 9V⎓3A, 12V⎓3A, 15V⎓3A (45W Max)

USB-A: 5V⎓3A, 9V⎓3A, 10V⎓2.25A, 12V⎓2.5A (30W Max)

USB-C1+USB-C2: 70W+70W (140W Max)

USB-C1+USB-C3: 100W+45W (145W Max)

USB-C2+USB-C3: 100W+45W (145W Max)

USB-C1/C2+USB-A: 100W+30W (130W Max)

USB-C3+USB-A: 5V⎓4A (20W Max)

USB-C1+USB-C2+USB-C3: 65W+65W+20W (150W Max)

USB-C1+USB-C2+USB-A: 65W+65W+20W (150W Max)

USB-C1/C2+ (USB-C3+USB-A): 100W+5V⎓4A (120W Max)

USB-C1+USB-C2+ (USB-C3+USB-A): 65W+65W+5V⎓4A (150W Max)

Rated Voltage: 250V~

Max Power: 2500W

Max Current: 10A

The three-prong plug features semi-rubberized prongs to effectively prevent accidental contact.

The length of the power cord is about 160 cm (62.99 inches).

The length of the charging station is about 222 mm (8.74 inches).

The width is about 99 mm (3.9 inches).

The height is about 64.5 mm (2.54 inches).

Power on to illuminate the charging station with a blue light effect.

The USB-C1 supports QC3.0/5, FCP, SCP, AFC, SFCP, PD3.1, PPS, DCP, SAM 2A, and Apple 2.4A charging protocols.

It features six fixed PDOs: 5V3A, 9V3A, 12V3A, 15V3A, 20V7A, and 28V5A, as well as two PPS voltage levels of 5-11V5A and 5-20V5A, along with a 15-28V5A AVS voltage level.

The protocols supported by the USB-C2 port are the same.

The PDO messages are also identical.

The USB-C3 supports QC3.0/4+, FCP, SCP, AFC, SFCP, PD3.0, PPS, DCP, SAM 2A, and Apple 2.4A charging protocols.

It features four fixed PDOs of 5V3A, 9V3A, 12V3A, 15V3A, 20V5A, and 28V5A. It also supports two sets of PPS, which are 5-11V 4.05A and 5-20V 2.25A.

The USB-A supports QC3+, FCP, SCP, AFC, SFCP, DCP, SAM 2A, and Apple 2.4A charging protocols.

The weight is about 1067.5 g (37.65 oz).

Teardown

Next, let's take it apart to see its internal components and structure.

The anti-slip pads hide screws inside.

Unscrew the screws and remove the bottom cover, which contains a thermal pad on the inside.

The thermal pad is coated with thermal paste to assist in chip heat dissipation.

The other side of the thermal pad features a copper plate, which is secured in place with double-sided adhesive.

Inside the casing, there is a control PCBA module and a fast charging PCBA module, connected via wired solder joints.

Cut the connecting wires and remove the fast charging PCBA module.

The PCBA module is filled with adhesive, and the side features a soldered buck PCB.

The backside corresponds to the PFC MOSFET, PFC rectifier, and AHB half-bridge chip, all of which are coated with thermal paste to enhance heat dissipation.

Clean off the thermal paste. The front of the fast charging PCBA module features components such as a fuse, varistor, safety X2 capacitor, common mode choke, NTC thermistor, bridge rectifier, film capacitors, filter inductor, PFC boost inductor, high-voltage filter capacitor, power supply filter capacitor, resonant capacitor, transformer, and synchronous rectifiers.

The backside contains the PFC controller, PFC MOSFET, PFC rectifier, and the AHB half-bridge chip.

The input side of the PCBA module features a fuse, common mode choke, safety X2 capacitor, and NTC thermistor. On the left side, there is a heatsink for the filter inductor and bridge rectifier.

The input fuse has a specification of 4A 250V.

The varistor is model 10D621KT, designed to absorb overvoltage surges.

The common mode choke is wound with enameled wire and insulated wire, while the safety X2 capacitor has a specification of 0.47μF.

The green NTC thermistor is used to suppress inrush current during power-up.

The common mode choke is wound with enameled wire.

The safety X2 capacitor has a specification of 0.47μF.

The side features a bridge rectifier, filter inductor, and PFC boost inductor.

The bridge rectifier is from NH, model GBU1506L, with a specification of 600V 15A, and it uses a GBU package.

The film capacitors have a specification of 1μF 450V, and both capacitors are of the same specification.

The filter inductor is wound with enameled wire.

The PFC controller is from Silergy, model SY5072B, marked with "D9." It operates in critical mode with constant on-time control. The built-in boost converter uses quasi-resonant switching with valley switching to achieve high efficiency and optimized EMI performance. It comes in an SOT23-6 package.

The GaN FET is from Innoscience, model INN700TK140C. It is an enhancement-mode GaN FET with a voltage rating of 700V, upgraded from the original 650V, with a transient voltage tolerance of 800V. The device has a conduction resistance of 140mΩ and supports higher power applications.

The Innoscience INN700TK140C supports ultra-high switching frequencies, has no reverse recovery charge, and features very low gate charge and output charge. It meets JEDEC standards for industrial applications, 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 conversion, DC-DC conversion, and totem-pole PFC. The device comes in a TO-252 package.

Here is the information about Innoscience INN700TK140C.

The PFC rectifier is from SGKS, model KS06065N. It is a silicon carbide Schottky diode with a specification of 650V 6A and comes in a PDFN 8x8 package.

The bypass diode is from MDD, model S3MB, with a specification of 1000V 3A, and it uses an SMB package.

The PFC boost inductor is insulated with tape winding.

The high-voltage filter capacitor is from JSH, with a specification of 450V 100μF.

The other filter capacitor has a specification of 450V 22μF.

The AHB GaN IC is from DONGKE, model DK8715BD. It is an AC-DC power switching chip based on an asymmetrical half-bridge architecture, integrating two Gallium Nitride (GaN) power devices. The chip achieves primary-side power MOSFET ZVS (Zero Voltage Switching) and secondary-side rectifier ZCS (Zero Current Switching) over a wide load range, enhancing the efficiency of the power system. The soft-switching capability reduces stress on the power transistors, while the built-in wide-range frequency jitter circuit minimizes switching losses and improves electromagnetic interference (EMI).

The DK8715BD supports a maximum switching frequency of 800KHz. When used with a front-end boost PFC, the recommended power is 150W, with standby power consumption less than 50mW. It features adaptive dead-time and shutdown algorithms, requiring no external adjustments and simplifying the external circuitry. Additionally, it is halogen-free, complies with RoHS standards, and includes high-voltage startup and X-capacitor discharge circuits, offering improved performance and reliability. The chip has comprehensive protection features and comes in a DFN8*8 package.

Here is the information about DONGKE DK8715BD.

The resonant capacitor has a specification of 0.47μF 250V.

The filter capacitor that powers the master control chip has a specification of 100V 47μF.

The transformer core is insulated with tape.

The CT1019 optocoupler is used for feedback control.

The blue Y capacitor has the part number JT221K.

The synchronous rectifier chips are from DONGKE, model DK5V120R15VT1. The chip has an integrated 120V voltage rating and 15mΩ conduction resistance for synchronous rectifiers. It features self-powering technology, eliminating the need for an external power supply, and can directly replace Schottky diodes. The chip supports CCM, DCM, and QR operation modes, and comes in a TO-220F package.

Here is the information about DONGKE DK5V120R15VT1.

The output filter capacitors are from JSH, with a specification of 1000μF 35V.

This side features a soldered buck PCB.

The buck PCB is soldered on the outside with USB-C sockets, USB-A socket, filter capacitors, and buck inductors.

The other side features buck protocol chips, synchronous buck MOSFETs, and VBUS MOSFETs.

The USB-C interface's buck protocol chip is from iSmartWare, model SW3566. It is an integrated 7A buck controller that supports 140W (28V@5A) power output and is compatible with multiple fast charging protocols, including PD3.1, making it a C&C dual-port SoC. The SW3566 features an ARM Cortex-M0 core, integrated Type-C interface logic, PD3.1 PHY, UFCS PHY, SCP/AFCPHY, TFCP PHY, and fast charging protocol detection circuits (QC/PE/SFCP). With only a few external components, it provides a complete and high-performance C+C dual-port fast charging solution.

The SW3566 integrates CC/CV mode, dual-port management logic, and bus voltage detection. When paired with the corresponding step-down MOSFETs and VBUS MOSFETs, it can achieve dual-port buck output. The built-in buck converter operates at frequencies of 125KHz, 180KHz, 333KHz, and 500KHz, supporting both PWM and PFM operation modes. Output current, line loss compensation, and other protection thresholds can be set via the MCU. The integrated ADC allows for data sampling of 9 channels, including input/output voltage, output current, and chip temperature, with external MCU support for parameter display.

The SW3566 supports a 36V input voltage, with a maximum output current of 7A. The chip includes built-in soft start, input overvoltage/undervoltage protection, output overvoltage/undervoltage protection, output overcurrent/short circuit protection, DP/DM/CC overvoltage protection, chip over-temperature protection, external NTC thermistor protection, and power-limiting protection. The chip comes in a QFN 4*4-32 package.

Here is the information about iSmartWare SW3566.

The synchronous buck MOSFETs are from LIHOMICRO, model LH042N04. They are NMOS transistors with a voltage rating of 40V, a conduction resistance of 4.2mΩ, and come in a DFN 5*6 package.

The filter capacitor is from JSH, with a specification of 220μF 35V, and is insulated with heat shrink tubing.

The VBUS MOSFET is also from LIHOMICRO, model LH042N04, and comes in a DFN 3*3 package.

The other buck protocol chip also uses the iSmartWare SW3566.

The synchronous buck MOSFETs use the LIHOMICRO LH042N04.

The filter capacitor is rated at 220μF 35V.

The VBUS MOSFET uses the LIHOMICRO LH042N04.

The buck protocol chip for the USB-C3 and USB-A ports uses the iSmartWare SW3536. This is a highly integrated dual-port charging chip that supports USB-A + USB-C dual-port fast charging output with independent current limiting for each port. It integrates a 7A high-efficiency synchronous buck converter and supports multiple fast charging protocols, including PPS, PD, QC, AFC, FCP, SCP, PE, SFCP, and TFCP. The chip can support a maximum output power of 140W.

The SW3536 integrates CC/CV mode, dual-port management logic, and dynamic power distribution between the two ports. With simplified external components, it provides a complete and high-performance multi-fast-charging protocol dual-port charging solution. The SW3536 supports a 36V input voltage, making it suitable for 12-24V input car charger applications. It is ideal for fast-charging adapters, power strips, and car charging applications.

The synchronous buck MOSFETs used are LIHOMICRO LH042N04.

The filter capacitor is rated at 220μF 25V.

The VBUS MOSFET for the USB-C port uses the LIHOMICRO LH042N04.

The VBUS MOSFET for the USB-A port also uses the LIHOMICRO LH042N04.

The buck inductors are wound with enameled wire and insulated with heat-shrink tubing.

The blue Y capacitor has the part number JT471K.

The blue Y capacitor is from NDF, with the part number 101K.

The front of the control PCBA module features varistors, a relay, a current transformer, filter capacitors, a transformer, an MCU, and a touch button.

The backside contains a bridge rectifier and a switch-mode power supply chip.

The three blue varistors are of the same model, from SGLG, model VDR14D561K, and are used to absorb overvoltage surges.

The current transformer is used to detect AC flow.

A close-up of the power supply copper posts on the backside.

A close-up of the fuse resistor at the input end.

The bridge rectifier is from MDD, model MB10F, with a specification of 1000V 1A, and it uses an MBF package.

The filter capacitor is from JSH, with a specification of 400V 4.7μF.

The other filter capacitor has the same specification: 400V 4.7μF.

The color-coded inductor is used for filtering.

The power chip is from On-Bright, model OB25133. It is a high-precision constant voltage and constant current primary-side power switch. The chip integrates a multi-mode controller, eliminating the need for a 431 voltage reference and optocoupler feedback. It features excellent dynamic response and comprehensive protection functions, and comes in an SOP7 package.

The power supply filter capacitor has a specification of 4.7μF 50V.

The transformer core is insulated with tape winding.

The SS14 Schottky diode is used for output rectification.

The filter capacitor is from JSH, with a specification of 10V 470μF.

The voltage regulator chip is from Microne, model ME6228A50PG. It supports a 30V input voltage rating, with an output voltage of 5V and an output current of 150mA. It comes in an SOT89 package.

The voltage regulator chip is from Microne, model ME6228A50PG. It supports a 30V input voltage rating, with an output voltage of 5V and an output current of 150mA. It comes in an SOT89 package.

The relay is from STSYJG, model 32F-SS-105LM. It has a contact rating of 16A 250VAC and a coil voltage of 5V.

LED indicators are placed around the touch spring.

A close-up of the touch detection chip.

The three sockets on the top are connected via PCB, and the inside of the cover features a semi-transparent insulating cover.

The edges of the sockets are equipped with round light shields.

The socket PCB is connected to the power supply via copper pillars soldered in place.

The RGB LED lights are connected via a ribbon cable.

The front of the PCB features safety shutters and a mounting bracket.

Remove the bracket, and the spring clip is soldered to the PCB.

There are 8 RGB LEDs surrounding the spring clip.

Isolation grooves are provided between the spring clips to enhance insulation.

Well, those are all components of the Lenovo thinkplus FLUXO 150W GaN Desktop Charging Station.

Summary of ChargerLAB

Here is the component list of the Lenovo thinkplus FLUXO 150W GaN Desktop Charging Station for your convenience.

It is equipped with 3 AC sockets, 3 USB-C ports, and one USB-A port. The USB-C ports support a total output power of 140W, with a maximum total output of 150W, and support automatic power distribution. The AC sockets feature surge protection, and the device also includes RGB LEDs with light effects that can be controlled via a touch button.

After taking it apart, we found that the internal design uses a partitioned layout, with the fast charging module and control module separated. The fast charging module features a PFC controller from Silergy, model SY5072B, paired with an Innoscience INN700TK140C GaN FET and an SGKS KS06065N silicon carbide diode.

The AHB integrated chip uses the DONGKE DK8715BD, while the synchronous rectifier chips are the DONGKE DK5V120R15T1. The USB-C ports utilize iSmartWare SW3566 and SW3536 for step-down output. All capacitors are from the JSH brand. The PCBA module is reinforced with adhesive and is equipped with brass heatsinks to enhance heat dissipation, ensuring a stable and efficient fast charging experience.

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