Introduction

Back to 2021, we posted a teardown video of the third generation of Baseus 65W GaN charger, which has gotten many views. You can click the related articles below to take a look. And today, we got the fifth generation of this 65W charger, which is equipped with two USB-C and a USB-A port. So let's go ahead and take it apart to see if there are any improvements to the previous generation.

Product Appearance

Like all Baseus products, the product is printed on the front.

And the specs info are on the back.

The box contains the charger, cable, sticker, and documents.

The Velcro cable tie can shorten and fix the cable.

The 100W and Baseus logo are engraved on this dual USB-C cable.

The cable length is about 1m (3' 3.37'').

The ChargerLAB POWER-Z KM002C can detect the E-Marker chip inside, and it can support 100W fast charging.

It adopts a black matte design with Baseus printed on the top.

The ETL certificate is printed on the side.

And the charger model, CCGAN65S5, is on this side.

All specs info are printed at the bottom. It can support input of 110-240V 50/60Hz 1.5A. Dual USB-C ports can support up to 65W output. And the USB-A can support up to 60W output. When charging multiple devices, the USB-C1 can maintain 45W. And the total power won't exceed 65W. It has also passed ETL, FCC certification.

The input prongs can be folded.

Two USB-C ports and a USB-A port are orange.

The length of the charger is about 32mm (1.26 inches).

The width is about 61mm (2.40 inches).

And the height is about 36mm (1.42 inches).

Compared with the Apple 61W charger, the size is much smaller but has two more ports.

This is how it looks like on my hand.

And the weight is about 116g (4.09 oz).

After connecting it to the power supply, the indicator light at the corner turns blue.

The ChargerLAB POWER-Z KM002C shows the USB-C1 supports FCP, SCP, AFC, QC3.0, PD3.0, PPS, QC4+ protocols.

And it also supports five fixed PDOs of 5V/9V/12V/15V 3A, 20V3.25A, and a set of PPS.

The supported protocols of the other USB-C port are the same as USB-C1.

The same goes for PDO info.

Finally, the USB-A supports FCP, SCP, AFC, and QC3.0 protocols.

Teardown

Next, let's go ahead and take it apart.

After removing the bottom case, we found the entire module is filled with gray potting compound. And two parts are connected by metal contacts, not wires. So, the input prongs can be quickly replaced during assembly.

Pull out the module, it's wrapped with Mylar sheet for insulation.

The length of the PCBA is about 28mm (1.10 inches).

The width is about 50mm (1.97 inches).

And the height is about 33mm (1.30 inches).

The PCBA module is powered by metal contacts.

The cyan thermal pad at the output can enhance heat dissipation.

Clean up the PCBA module. A small PCB is soldered with fuses and other components, spanning the primary and secondary side. The transformer is placed in the middle of PCBA.

A small output PCB is soldered with USB-A and USB-C female sockets, as well as two solid capacitors for output filtering.

The fuse, NTC thermistor, high voltage filter capacitor are on the right. The buck inductor and the small output PCB are soldered on the left side of the transformer.

The GaN IC, SMD Y capacitor, and synchronous buck MOSFET and MLCC filter capacitors are on the back.

ChargerLAB found it adopts QR flyback topology. Three USB ports are controlled by two independent buck circuits.

First, disassemble the charger's PCBA module completely.

The fuse, NTC thermistor, safety X2 capacitor, common mode chock, rectifier, feedback optocoupler, synchronous rectification circuit and filter capacitor are on this small PCB.

The X capacitor and discharge resistor are on the back.

The input time-delay fuse is from Better Electronics. 3.15A 250V.

The 7mm green NTC thermistor is used to suppress the inrush current. 2.5Ω.

The common mode choke is wound with magnet wires and insulated wires.

The safety X2 capacitor is from DGCX. 0.1μF.

The bridge rectifier is formed by four diodes. Model is S5MB. 5A 1000V for each.

Those four electrolytic capacitors are from Yongming. Three of them are 27μF 400V.

And the other capacitor is 33μF 400V. 114μF in total.

The primary master control chip of the charger adopts Southchip's GaN IC SC3057. This chip integrates high-performance multi-mode flyback controller, GaN driver, GaN FET, power supply and protection circuits. Simplify the number of external components and eliminate the parasitic elements of traditional drive wiring on high-frequency switching through package integration.

The Southchip SC3057 adopts a design that separates power wiring and control wiring to reduce the impact of high-frequency switching on the control loop, and optimizes the charger wiring design and electrical performance through optimized pad design, which simplifies design development. It has a built-in 165mΩ GaN FET, supports 175KHz switching frequency, and X-capacitor discharge.

ChargerLAB learned that Baseus 67W 1A1C GaN charger, Anke 67W 2C2A GaN charging station, Anke 65W 2C1A power strip and other products also use Southchip SC3057.

The tiny capacitor that powers the master control chip is from Yongming. 50V 10μF.

The largest component is the transformer, which is tightly wound with yellow tape for insulation.

The SMD Y capacitor marked with TMY1152M is from TRX, which features in small size and light weight, and are very suitable for high-density power supply products such as GaN charger.

TRX focuses on the R&D, production and sales of passive components, with a registered capital of 100 million yuan. It has two types of capacitor brands: SMD TRX and DIP TY capacitors. TRX will devote itself to the research of ceramic materials in order to provide customers with more solutions.

ChargerLAB found that Baseus Qualcomm QC5 certified 100W GaN fast charger, Mcdodo 100W GaN charger, OPPO 65W super flash GaN charger, Lenovo 90W GaN fast charger, Nubia 65W GaN charger, Baseus 120W GaN plus silicon carbide PD chargers are using TRX SMD Y capacitor. It can also be used in ARUN, DIVI, Belkin 20W mini fast charger, the performance has been widely recognized by customers.

This is a small vertical PCB. And the SMD optocoupler on it is from UTC, which is used to regulate the output voltage. Model is UPC1009G.

The synchronous rectification controller is from Southchip, model SC3503, which features in adaptive turn-on detection and fast turn-off. It does not need auxiliary coil power supply, and the output voltage can be as low as 0V. The patented adaptive turn-on detection circuit avoids the synchronous rectifier from being mistaken as turned on. It is compatible with various MOS, has ultra-low static current, supports multiple operating modes, and supports both high-side and low-side synchronous rectification with very few peripheral components.

ChargerLAB learned that UGREEN 30W PD GaN charger, ZENDURE 65W 2C1A GaN charger, Baseus 65W GaN power strip, Nubia Minion 65W dual-port GaN charger and other products also use Southchip SC3503.

The synchronous rectifier is from LiHo Micro and adopts DFN 5 x 6 package. Model is LH032N100. Withstand voltage is 100V.

Those two solid capacitors are connected in parallel for output filtering and are from Yongming NPX series. 470μF 25V for each.

Here is the output PCB, which is equipped with three USB ports and two filter capacitors.

And there're two buck circuits on the back.

The protocol chips of both buck circuits are from Ismartware. It can control the buck output of dual USB-C ports and integrates a variety of fast charging protocols. It also supports a large current output of 7A, independent current limiting. The SW3556 supports driving low-voltage GaN FET, which can further improve the efficiency of the voltage reduction circuits, and reduce the size of the charger and its heat dissipation requirements.

The Ismartware SW3556 features synchronous rectification buck topology and a 40V input, with a built-in synchronous rectification buck controller. When paired with simple peripheral devices such as silicon MOS or GaN FETs, inductors, and capacitors, it can support high power output of up to 140W. The built-in buck controller has a switching frequency of 125KHz and supports PFM/PWM mode operation to optimize conversion efficiency.

Moreover, the Ismartware SW3556 supports pin external resistance for configuring output power and dynamic power allocation without an external microcontroller, making peripheral devices more concise and cost-effective when developing multi-port fast charging power banks. It is suitable for product fields such as car chargers, multi-port chargers, and power strips.

The buck master control chip of the other circuit is also SW3556.

The 8-bit MCU is from Chipsea and can automatically control the output power. It integrates a 12-bit ADC and adopts MSOP10 package. Model is CSU32P10.

ChargerLAB learned that Baseus 67W 2C1A+HDMI multifunctional GaN desktop charger, MOMAX 40W dual USB-C fast charger, and SHARGE 100W 3C1A GaN charger and other products also use Chipsea CSU32P10.

The corresponding buck MOSFETs are soldered on the main PCB at the bottom. Two groups of MOSFETs for two buck circuits are also from LiHo Micro. Models are LH100N03 and LH75N03.

Here are three magnetic inductors.

These are some MLCC capacitors.

This is the indicator light on the edge of the PCBA module.

The VBUS MOSFET of USB-C1 is from LiHo Micro. Model is LH075N03.

And the VBUS MOSFET of USB-C2 and USB-A is also from LiHo Micro, which adopts DFN 3 x 3 package. 8mΩ, 30V. Model is LH3020.

Those two solid capacitors are used for two buck circuits.

They're from Yongming NPX series. 220μF 25V for each.

The plastic sheets inside the two USB-C sockets are orange.

And the plastic sheet inside the USB-A socket is also orange.

That's all for the teardown.

Summary of ChargerLAB

Well, that's all components of the fifth generation of Baseus 65W GaN charger. Compared with the previous generation, the progress is obvious. The GaN FET and driver have been packaged into a Southchip GaN IC. And the gray potting compound makes the charger more solid and maintains peak power for longer. So, you can consider buying one if you need to charge multiple devices, or you can also upgrade to the fifth generation if you already have the older charger.

This charger is priced at $29.59 on Amazon US now. You can click the button at the beginning or the end of the article to get one!

Related Articles：
1. Teardown of Baseus 65W GaN Pro 2C1A Charger (The Third Generation)
2. Teardown of Baseus 67W GaN5 Charging Station (With HDMI Port)
3. Teardown of Baseus 65W GaN5 Pro Fast Charger (2C1A)