Tear down of Bull 65W PD Fast Charging Power Strip

As the leader in the power strip industry, Bull recently launched a multi-port power strip with a power of up to 65W 2A1C. The maximum output power of the USB port is 18W and 65W respectively, and it supports multiple fast charging protocols. Let's take it apart to see the internal materials.

1.Product Appearance

The packaging box adopts a white and green color and the box is flat and slender.

The box print with Bull logo,Product name and Features

Another side print with 1.8M length and support laptop 65W fast charging information.

The back side print with product parameters,features,attention and after-sales service etc. Information.

Pack with a dust bag inside

The cable is bundled with plastic-coated wire, with a specification of 300/500V 3 X 1.0mm ²

Three-pin plug with intaglio Bull logo

The plug has grooves on both sides for easy Plugging and unplugging.

With "GNT-10BS10" model and "10A 250V" specification parameters on the inside of the plug, and it has passed 3C certification.

The power cord is about 1.6m long, the body is about 20cm long, and the total length is 1.8m.

Add a rubber sleeve at the connection between the socket body and the wire body to resist bending

The Bull fast charging extension cable socket adopts a White PC flame retardant material, with a frosted top surface and a side glossy design.

The power switch, print with the Bull logo next to it

Below are three 2A1C USB ports,all with blue rubber cores.

The interface is stamped with a distinguishing mark and the max output power of each port.

There are six sockets on it, including three 3 + 2 sockets and three 2 sockets each

Each AC socket is equipped with a safety door to prevent accidents caused by children's curiosity and playfulness.

There are soft rubber pads at the four corners to increase friction and prevent the power strip from slipping on the table. It also hides the screws for decorative purposes. The product specifications and other information are also marked on the bottom shell.

Model:GNV-UU2656

A warning at the end of the bottom.

The ChargerLAB POWER-Z KT002 shows the USB-C output protocols supports Apple 2.4A, Samsung 5V/2A and DCP protocols, as well as QC2.0/3.0, AFC, and FCP fast charging protocols.

The PDO message shows the USB-C port also supports the USB PD3.0 fast charging standard, with five sets of fixed voltage levels: 5V3A, 9V3A, 12V3A, 15V3A, 20V3.25A, and 3.3-21V3A PPS voltage levels.

In addition, The KT002 shows USB-A1 port supports Apple 2.4A, Samsung 5V/2A, DCP, QC2.0/3.0, AFC, FCP protocols.

The KT002 shows USB-A1 port supports Apple 2.4A, Samsung 5V/2A, DCP, QC2.0/3.0, AFC, FCP protocols.

2.Teardown

Remove the soft rubber plug, all four corners of the body are fixed with H-shaped anti-disassembly screws.

Open the shell, there are many small cylinders on the bottom shell, and there is a primary isolation plate for the charger at the right side.

The end of the power strip is fixed with screws and locks, and the integrated copper strip is fixed with buckles. There is an isolation plate between it and the charger, and the socket power supply  is soldered and led out from the circuit board.

The PCB board, the transformer area is equipped with brass heat sink, and insulating tape is pasted on the heat sinks. The Type-C interface board and the output secondary buck board are independently welded.

Remove the heat sink, and most components such as transformers, inductors, and capacitors are reinforced with glue. The separation between the primary stages is obvious

The back of the board is equipped with a heat sink, and there is a black insulating plate between the two.

Remove the heat sink, the two main heating chips of the rectifier bridge and the synchronous rectifier MOS are attached with thermal pads to help dissipate heat.

The PCB board, with relays on the left for the socket output control. Sandwiched between the relay and the output board are components such as charger delay fuses, common-mode inductors, and X capacitors.

Ningbo Huilongcang 932-5VDC-SL-AH relay

Huilongcang 932-5VDC-SL-AH relay specification

Fuse coated heat shrink tube

Two filter inductors

The filter capacitor specification is 400V 2.2μF.

Another one has the same specifications, and both capacitors are from the SAMXON brand.

1. shaped inductor coated heat shrink tube

In addition, there is a small capacitor with a specification of 10V 220μF.

The Kiwi Instruments KP321XB series high-performance and low-cost PEM control power switch

KIWI KP321X series information

Hiliwi HLW8012 single-phase multi-function metering IC, with sampling resistor to collect power strip current.

Hiliwi HLW8012 information

The IC of screen-printed L1515 responds to button switch operation and detects the current signal output by HLW8012 for overload protection

The Power Switch

The above is the internal relay control circuit of the plug strip, and the following is the 65W fast  charger circuit, which adopts a constant voltage output and secondary voltage reduction architecture

Next to it is an LED light with a heat shrink tube

Time delay fuse 3.15A 250V

Common-mode inductors are covered with heat-shrinkable tubes to filter out EMI interference.

The capacity of the safety X capacitor is 0.47μF.

Filter inductor

The input rectifier bridge WRLSB80M from Shenzhen World Industrial Co., Ltd. has a soft recovery curve and smooth turn-off characteristic to reduce the diode junction capacitance to achieve very little harmonic oscillation. The LSB package selected has good heat dissipation characteristics to improve the reliability of medium and large wattage adapters. A single chip can achieve 60W +.

World WRLSB80M specification.

ChargerLAB learned that Mcdodo2C1A 65W GaN Charger,Hongda Shun 65W GaN Fast Charger, OPPO 50W Biscuit GaN Fast Charger, ROCK 65W GaN Charger, Baseus 18W PD GaN Charger, Mcdodo 30W 1A1C Fast Charger are using World soft recovery bridge. The product performance has been widely recognized by customers.

The PCB board, there are multiple high-voltage filtering electrolytic capacitors on the left side, two of them are also equipped with insulating tubes on the top.

Two black electrolytic capacitors are from Aihshi 400V 22μF.

The other two are Ymin aluminum electrolytic capacitors 400V 27μF.

The Ymin KCX series aluminum electrolytic capacitor is a special product for fast charging power supply launched in 2019

In addition, there is a capacitor coated insulation tube, SAMXON 400V 15μF.

The PCB board side,The primary switch MOS is equipped with a heat sink to help conduct heat

PWM power supply capacitor 63V 4.7μF

The PWM master control chip adopts Leadtrend LD5763BGSM.

Leadtrend LD5763BGSM specification

Primary switch MOS transistor, AOS AOTF360A70L, NMOS, withstand voltage 800V.

AOS AOTF360A70L information

Transformer with information label on the top

Everlight EL 1018 optocoupler, spanning between primary and secondary for primary and secondary communication, feedback output voltage

Blue Y capacitor for output anti-interference

The secondary synchronous rectifier controller is from MERAKI, model MK91808.

MERAKI MK9180 Specification

Secondary synchronous rectification MOS, CR Micro with screen printing 088N12N

The Output terminal, the two buck circuits are installed on the small board and reinforced with glue.

Two synchronous rectifier output filter solid capacitors 25V 470μF

Silk-screen-free MCU for intelligent distribution of USB-A and USB-C output power

USB-A--The back of secondary voltage reduction PCB board

The back of the PCB board is equipped with a ISMARTWARE SW3510

ISMARTWARE SW3510 information

ISMARTWARE SW3510 Plug in Vanguard VS3622DB

Vanguard VS3622DB Information

Vanguard VS3622DE dual NMOS, with a withstand voltage of 30V.

Vanguard VS3622DE information

The other side of the PCB board is a buck inductor and an output filter solid capacitor. The magnetic ring inductor is covered with a heat shrink tube, and the output filter solid capacitor specification is 16V 180μF.

Two USB-A socket are vertically welded through holes

USB-C the back of the secondary voltage reduction PCB board

The USB-C port uses the ISMARTWARE SW3510 as a voltage reduction and protocol IC

Two external Vanguard VS3610AE,NMOS for USB-C port output synchronous rectification and voltage reduction

Vanguard VS3610AE information

The front of the PCB board is equipped with a magnetic ring buck inductor and two solid-state filter capacitors, with capacitor specifications of 25V 220μF and 25V 100μF respectively.

USB-C socket

That’s all for the teardown

Summary of ChargerLAB

The Bull 65W PD fast charging Power strip adopts a white PC flame-retardant material body with a simple appearance. As the first power strip product under the Bull brand that supports 65W USB PD fast charging, it marks the official entry of traditional power strip manufacturers into the USB PD fast charging field. The power strip is equipped with six sets of national standard sockets and three USB charging interfaces, which can not only meet the power supply of household appliances, but also charge digital products such as laptops, mobile phones, tablets, and game consoles, making it very practical. The power supply of the entire power strip can be controlled by a micro switch and easy to use.