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Home › Teardowns › Chargers › Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank

Yi
2 yearsagoChargers
0 1

Recently, ChargerLAB has got hands on the AC adapter with built-in battery, which applies GaN technology from L Lab Corporation. 

This product has packed together a 60W AC charger and a 10000mAh battery pack. 

It has dual USB-C output ports. Either of the USB-C ports could achieve max output at respective mode (charger mode or power bank mode). It's very convenient for daily use. 

At AC charger mode, either of the USB-C ports is capable of outputting 60W power, which in other words, it could power most of the laptops. 

While at power bank mode, you would have the choice of either powering your laptop at 40W through a single USB-C port, or two iPhone 12 at 20W through each of the USB-C ports. 

One of the awesome features of the product, in terms of futuristic technology, is the use of innovative technology – DC Bypass Topology. The DC bypass topology, compared to conventional type, it could achieve DC to DC parallel powering through independent reference source without the need of any ICs. In overall, the system efficiency, with the DC bypass topology, has increased by 3-4%, which is remarkable in AC adapters. 

Let's do the teardown on the product to see how the design looks. 

  1. Overview of the product
Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The enclosure of the product is polycarbonate (PC) material. There is a grey plastic panel with matte finishing at the output ports for cosmetic purpose. With properly rounded edges and corners, grip and touch are friendly for users. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

At the center of the product is the capacity LED indicators, with product name and touch sensor instruction at the bottom. By touching the sensor area, the blue capacity indicator will light up. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

 On the bottom side of the enclosure, marks the rating. 

Model: PST-60C2PB

AC Input: 100-240V~50/60HZ 

USB-C Input: 5/9/12V 18W Max

Battery charging spec: 8.4V2A Max

At AC adapter mode:
USB-C1/C2 Output: 5V3A、9V3A、12V3A、15V3A、20V3A  Max
Total output: 60W Max

At Powerbank mode:
USB-C1/C2 Single port only output: 5V3A、9V3A、12V3A、15V2.67A、20V2A  Max
USB-C1/C2 output):5V3A、9V2.22A、12V1.67A
Total output: 40W Max

Battery capacity: 9600mAh

The product has been certified for CE, FCC, ETL, ROHS, and DOE VI. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

There are wings at both sides of the prongs, which helps to stabilize when the product is plugged into wall outlet. Below the prongs, there is an LED for illumination purpose. When the prongs are folded, the LED will turn off, vice versa. With the help of illumination LED, users could easily locate the wall outlet in the dark, or for emergency illumination purpose. 

The LED also has the function of AC input detection. In other words, when AC source is detected through prongs, the illumination LED will turn off automatically, vice versa. So, in the scenario of power cut, the LED will light up to help user locate where the product is. According to the information from the manufacturer, this function is patent pending. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

There are markings by the LED to remind the user to fold back the prongs to avoid draining power through LED. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

There are 2 USB-C ports with identical configuration, with power capabilities from 20-60W. Both of the ports support maximum output powers, which is 60W at AC adapter mode or 40W at power bank mode. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The length of the product is measured at 81.4mm. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The width is 75.92mm. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Height is 32.39mm.

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Let's compare it with Apple 61W AC adapter. It's slightly longer. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

This is what it looks like with user holding it. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Weight is 291g. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

At AC adapter mode, we use ChargerLAB Power-Z KT002 to check the configuration. It is compatible with Apple2.4A, Samsung 5V2A, DCP, QC2.0/3.0, PD3.0, and PPS protocol. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

PD3.0 PDO shows 5V3A, 9V3A, 12V3A, 15V3A, 20V3A, output configuration. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The configuration is identical to the other USB-C port. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

PDO is identical as well. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

At power bank mode, we use ChargerLAB Power-Z KT002 to check the configuration. It is compatible with Apple2.4A, Samsung 5V2A, DCP, QC2.0/3.0, PD3.0, and PPS protocol. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

PD3.0 PDO shows 5V3A, 9V3A, 12V3A, 15V2.66A, 20V2A, output configuration. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

At power bank mode, the protocol capabilities are identical in both of the USB-C ports. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Same as PDO configuration as well, at power bank mode. 

In other words, the USB-C ports are identically configured and capable of output max power at respective AC adapter mode and power bank mode, which is quite user-friendly and straightforward. 

2. Teardown of the product

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Take apart the output panel. The panel is fixed with snaps. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Crack open along the parting line, the top and bottom casing are assembled through the ultra-sonic welding process. We can see copper foil (touch sensor part) adhered at the top housing. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The PCB is fixed with screws. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Loosen the screws, PCB is taken away from the casing. 

Prongs is engineered into modular type, with springs as the input conductor. 

The battery is protected with black plastic insulation casing. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

In addition to the protective casing, there are nano-material, and graphene materials used on the battery packs for enhanced safety purpose. The nano-material is used for heat insulation, while the graphene is to dissipate the heat on the battery pack. There are also mylars on both side of the battery pack for insulation purpose. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Battery cells are 21700 NCA Li-on cylindrical type, in serial connection. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The left side of the motherboard is the layout of AC adapter, with heat sink to help dissipation. The heat sink is wrapped with insulation tape. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The heat sink is soldered to PCB. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Removed the heat sink, we could see thermal pads placed on motherboard and daughterboard for heat dissipation. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Overview of the top side. Caps, transformers are applied with extra glue for fixation. 

There is an insulation barrier that separates the primary and secondary sides. 

The layout is very tightly fitted, with great volume efficiency. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

According to the source, the product uses a special type of topology. Comparing to conventional topology which both of the DC to DC circuits have to operate simultaneously, this special type bypass one of the DC to DC circuit to improve efficiency. 

In addition, there is an innovative mutual adjustment circuit used along with the bypass topology. This circuit could achieve DC to DC parallel powering through independent reference source without the need of any ICs.

The bypass topology has improved 3-4% efficiency comparing to conventional type. What's more stunning is, the whole circuitry of this topology is achieved through analog circuit (circled in red), without using any IC. This topology and circuit have already been applied for patent. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

There is an LED soldered at the front end of the primary circuit. On the left is an inductor fit into the opening on the board. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Removed the daughterboard, we can see the caps and transformer below. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Fuse, X-Cap, filter caps, and so on are placed on motherboard. There are two boost inductors and two filter solid-state caps at the output side.

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The fuse spec is 3.15A 250V. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

X-cap, with insulation tube at the soldering pin. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Common mode inductor, for EMI filter purpose. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

A pair of ABS210 rectifier bridges can even out heat. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

All of the 3 high voltage filter caps are KCX series, manufactured by YMIN, 2 of which is 27uF 400V. These caps are released by YMIN in 2019 for GaN charger application. Its operating temperature range is between -55°C~105°C, with features of 3000hrs life-span, lightning proof, low current leakage (low standby energy consumption), high ripple current, high frequency low resistance, etc.

We have found out, YMIN KCX series caps are also used by Bull 65W GaN AC adapter, Philips 65W GaN power strip, Momax 65W 2C1A GaN AC adapter, UBI 30W 1A1C GaN AC adapter, Nubia 65W 2C1A GaN AC adapters, etc. It is a product with wide reputation. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The third one is 22uF, 400V. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

I shape inductor, with heat shrink tube wrapped around. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The third filter cap is manufactured by Yunrui, the spec is 22uF, 400V. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Cap used for driver IC is 50V, 10uF. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Transformer close-up, with copper foil wrapped around for shielding purpose. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Controller IC, GaN MOS and Y-Cap are placed on the daughterboard. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

There is another MOSFET and optocoupler at the other side of the daughterboard. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The controller driver chip is manufactured by ON-SEMI, model NCP1342, which is an HF-QR flyback primary side PWM controller with active X2 caps and multiple protection functions, and low standby power consumption. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

High voltage GaN MOSFET is from Innoscience, model INN650D02, rated Vds 650W, max Vds at 750V, rated Rdson at only 0.2Ω. The MOSFET is complied with JEDEC standard application, features ESD protection, supports Kelvin Source. The max operating temperature can reach 150°C. 

INN650D02 "InnoGaN" has excellent electrical characteristics, with very low Rdson, which is the perfect application on SMPS that requires high frequency and high efficiency. The size is DFN8*8, with excellent heat conductivity. 

It is worthwhile to mention that INN650D02 uses 8-inch process, which was the first GaN component that went into mass production. And it is getting more and more popular in terms of application. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Detail spec of INN650D02

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

This is an HK1017 optocoupler, for primary-secondary feedback, on output voltage. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The SMD Y-Cap is from Sichuan TRX, which features small size, light weight, etc. It is the perfect match for high power density SMPS such as GaN AC adapter. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

TRX specializes in passive component R&D, sales. The company register capital is at RMB 100 million. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

This is a MOSFET, marked with 33477, for output ports controlling. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Another cap is soldered on the output PCB, and glued for extra fixation. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The heat sink and thermal pad at the back helps heat dissipation. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Removing the heatsink, we discover SR controller and SR MOSFET. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The synchronous rectifier controller comes from JoulVatt JW7726B, which supports CCM, DCM, QR and ACF modes and can effectively prevent the synchronous rectification MOSFET from turning on by mistake.

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Specification of JoulVatt JW7726B.

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Synchronous rectifier MOSFET is from Longten, model LSGN10R080, rated Vds at 100V, DFN5*6 in size.

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Output filter solid cap is from YX electronic, rated at 220uF 25V. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The other output filter solid cap is from YX electronic as well, rated at 220uF 25V. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Close up on USB-C receptacle, with black tab, without showing metal.

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Close up on the other USB-C receptacle

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Back at motherboard, filter inductor, caps and thermistor are on the top side. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

At the back of the motherboard is the buck-boost circuit, including two controller chips and two sets of eight MOSFETs. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The AC detection is realized through Hall components here. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Marked with 3016M.

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The inductor in buck circuit of battery charging module. It is wrapped around the heat shrink tube. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Marked with 3346.

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

ZC micro-electronic, model ZCC6688T. It's a lithium battery charging IC. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Close up on the charging protection IC. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Touch sensor IC, marking 233DH. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The two unknown controller ICs, which markings are removed. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Here are 2 sets of MOSFET arrays, total of 8 pieces, model 3016M, for the purpose of buck-boost conversion, working along with controller IC. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Close up on the 2 inductors in buck-boost circuit. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Output solid state caps from YX electronic, rated at 220uF, 25V. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

The other output solid caps from YX electronic, rated at 220uF, 25V.

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Close up on thermistor. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Close up on the MOSFET by the Vbus, model 3345. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Close up on the other MOSFET by the Vbus, model 3347. 

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Close up on the illumination LED.

Teardown of L Lab Two-in-one 60W GaN Fast Charger With 10000mAh Power Bank-Chargerlab

Full sets of parts and components. 

Conclusion

The AC adapter with built-in battery pack from L Lab Corporation has glossy finished casing, properly-rounded corner and edge, which grip and touch are friendly for users. 

The LED functions are very interesting, one is for capacity indication through touch, the other one is for emergency illumination. 

Both USB-C ports support QC、AFC、FCP、PD protocol, configured from 5-20V, rated for 20-60W. It does the job of charging your laptop, and fast charging for 2 smartphones simultaneously, which is very functional. 

The tech features, through the discovery of the teardown, are bypass topology and DC to DC parallel powering through independent reference sources. These features were unseen in our previous teardown. 

And it uses quality components, controller IC from ON-SEMI, SR controller IC from JOULWATT, and HF MOSFET from Innoscience. 

There are 2 controller chips to manage power bank, but unfortunately unidentified. The YMIN and YX caps help to reduce the dimension. 
Also, there are very rounded protection features using thermistors, as well as heat conduction/insulation designs using heat sink and thermal pads. 
In conclusion, the overall design and production process are well attended to.

10000mAh 60W GaN L Lab Power Bank Teardown
1
The article is originally written by @Yi posted on Chargerlab. All rights reserved.
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