introduction

Chint is a well-known domestic smart energy solution provider, the group layout intelligent electrical, green energy, industrial control automation, smart home and other industrial sectors, its products cover industrial and civil, with a number of solutions in different industries, not only civil appliances, in the industrial aspect also has a deep layout.

The charging head network has obtained a socket converter launched by Chint, which can expand to two new national standard five-hole jacks and two new national standard two-hole jacks, and has three fast charging interfaces of 2A1C, supporting 30W output power, and meeting AC and DC output expansion. Here is the disassembly of this Chint socket converter to see the materials and workmanship inside.

The Chint 30W fast charge converter is unpacked



The packaging box adopts pure white background design style, the front is printed with product appearance and name words, the top left corner is printed with Chint brand Logo, and Chint is the official supplier of Hangzhou 2022 Asian Games, quality is guaranteed.

The back of the box is printed with the adapter specification inscription, product bar code and brand information.

Product model: Sunrise 6-0222UC

Product Name: Converter (with power adapter)

Technical parameters: MAX 2500W MAX 10A 250V~

USB input: 100-240V to 50/60Hz 1A MAX

USB output:

USB-C single port output: 5V3A, 9V3A, 12V2.5A, 15V2A, 20V1.5A

USB-A single port output: 5V3A, 9V3A, 12V2.5A

Multi-port output: 5V3A MAX

Brand owner: Zhejiang Zhengtai Home Technology Co., LTD.

The instruction manual is included in the package.



The interior of the package is only the adapter body, which is made of fireproof and flame-retardant PC material. The fine line frosted white shell + the splicing design of the black shell processed by laser drawing and engraving are anti-scratch and anti-scratch. And has USB interface and AC strong current interface.

The front is equipped with 2A1C three USB ports and two sets of 3+2 new national standard combination jacks. The internal plastic core of the USB female port is black.

The power indicator is provided in the upper right corner, and the USB1, USB2, and TYPE-C logo are designed next to the interface for easy use.

The AC jack has a white protective door inside to prevent electric shock.

The design below has the CHNT brand and the words MAX 2500W, indicating the maximum power that the product can carry.

There are also two sets of two-foot AC sockets at the top, and the interior also has a white protective door design.

The back adopts the fixed pin design, which is more stable when the wall is inserted and is suitable for home use.

The back shell also has the product specification parameter inscription, which is consistent with the packaging box, and does not do too much to elaborate. The product has passed CCC certification.

Using the ChargerLAB POWER-Z KM003C test, the USB-C port supports FCP, AFC, QC3+/4+, PD3.0, PPS, Apple 2.4A charging protocol.

The PDO message shows that the USB-C port has five sets of fixed voltage gear: 5V3A, 9V3A, 12V2.5A, 15V2A, 20V1.5A, and 5-11V3A PPS voltage gear.

The measured USB-A port supports QC2.0/3.0, AFC, FCP, SCP, Apple 2.4A, Samsung 5V2A, DCP charging protocols.
 

Chint 30W fast charge converter disassembled

After reading the unboxing and testing of this Chint fast charge converter, we will disassemble it and look at the internal design and materials.

First, remove the cover plate on the back of the socket to expose the copper strip of the internal PCBA module and socket.

The upper part of the socket is a fast charging PCBA module, and the lower part is a socket module, which is composed of integrated copper strips and equipped with a safety door.

There is an isolation plate on the back of the cover plate to separate the fast charging PCBA module from the socket module.

The fast charging PCBA module is connected to the socket module through a wire to obtain power.

Remove the socket module and the fast charge PCBA module from inside the housing.

The socket module consists of a single copper belt, and the pins and power supply wires are connected by welding.

New national standard five-hole jack security door close-up.

New national standard two-hole socket safety door close-up.

Close-up of the black return spring in the middle of the safety door.

Using vernier caliper, the thickness of the integrated copper strip is about 0.46mm.

The power supply wire of the fast charging module is connected by welding, and the solder joints are full and smooth.

The wire is coated with heat shrink tube to strengthen insulation.

Front view of the PCBA module, the left side is AC input, welded fuse, NTC thermistor, common mode inductor, high voltage filter capacitor, the bottom is also welded high voltage filter capacitor, the right side is the transformer, fixed by white glue, the upper right corner is the output filter capacitor, the left center position is the protocol chip and USB base.

Fast charging PCBA module back welded rectifier bridge, primary power chip, chip Y capacitor, feedback optocoupler and synchronous rectifier chip. Slots are opened between the primary stages of PCBA module, and the shell structure is used for insulation isolation.

Through the observation of the fast charging PCBA module, it is found that it uses flyback switching power supply with wide voltage output, and the output voltage is fed back to the primary main control chip by the protocol chip through the optocouple, and the output voltage is adjusted to supply power to the output interface, realizing the output strategy of single-port fast charging and multi-port 5V. Here we start from the input side to understand the design and materials of the entire fast charge module.

Input wire cord end terminal welding, welding fuse, common mode inductor, NTC thermistor.

The input delay fuse is 2A 250V.

NTC thermistor screen 5D-9, in series with fuse, used to suppress the surge current of the plug.

The input rectifier bridge is from. The model is WRMSB30M and the specification is 3A1000V. This soft bridge through the softer recovery curve, smoother turn-off characteristics, can reduce the diode junction capacitance to achieve very little harmonic oscillation effect.

Wald WRMSB30M specification data.

It is understood that the use of Wald WRMSB30M is also instant 65W 2C1A gallium nitride fast charger, Momis 65W 2C1A gallium nitride fast charger, McDuo 30W 1A1C fast charger and other products.

The high voltage filter capacitor comes from AiSHi Aihua, and the three specifications are 400V15μF.

LED power indicator close-up.

The main control chip of switching power supply adopts Bieasy KP22035, which is a high-performance current mode PWM conversion chip with CoolMos integrated for off-line flyback converter. The chip adopts green energy-saving mode, burp mode, mid-load bottom conduction mode and other optimization system efficiency, which can easily meet the six level energy efficiency requirements. The chip supports 8-75V VDD power supply, which is convenient to meet the requirements of wide voltage output power supply.

KP22035 built-in high precision 65KHz switching frequency oscillator, integrated slope compensation, soft start, jitter technology, loop gain regulation and other functions. The stability, reliability and electromagnetic compatibility of the system have been greatly improved.


 

KP22035 is fully integrated with protection features, including: VDD Undervoltage protection (UVLO), VDD Overvoltage protection (VDD OVP), Output overvoltage protection (OVP), output undervoltage protection (UVP), cycle current limit (OCP), overload protection (OLP), short circuit protection (SCP), built-in overheat protection, front blanking (LEB), CS pin open protection, etc.

Charging head network disassembly learned, Products that use BYI micro fast charging scheme also include Aoyuan 65W PD fast charging, NEOQUICK 65W 2C1A three-port fast charging, Yilike 45W PD fast charging appliance, THEONE 65W 1A1C fast charging electrical appliances, Zimi 20W fast charging, Nubia 22.5W sugar fast charging, Anke 20W mini charging, Aoki 20W mini charging, Pinwin 20W mini charging, etc., product quality is highly recognized by customers.

The size of the electrolytic capacitor powering the main control chip is 50V10μF.

The magnetic core of the transformer is tightly wrapped and insulated with tape.

The chip Y capacitor, model TMY1222M, has the characteristics of small size and light weight, which is ideal for application in high density power supply products such as gallium nitride fast charge.

Terixiang focuses on the research and development, production and sales of passive components, with a registered capital of 100 million yuan. There are two independent capacitor brands: SMD TRX and DIP TY capacitors, TRX will be committed to the research of ceramic materials, in order to expand the application of more categories, to provide customers with more solutions.



Charging head network learned that in addition to being used by dozens of high-power chargers such as McDuo 100W gallium nitride, OPPO 65W super flash charge Gallium nitride, Lenovo 90W Gallium nitride fast charge, Nubia 65W Gallium nitride charger, BeX 120W gallium nitride + silicon carbide PD fast charger, It can also be applied to the 20W mini fast charge of Hailutong, First Wei, Belkin and other brands, and the performance has been unanimously recognized by customers.

EL1019 optocoupler is used for output voltage feedback regulation.



Synchronous rectifier chip from Biyi Micro, model KP40512, is a high-performance synchronous rectifier chip with fast shutdown function. Chip built-in 100V 10mΩ synchronous rectifier tube, support DCM, CCM and QR working mode, support PD and QC charger wide range voltage application, support high side and low side use, no auxiliary winding power supply, peripheral components simplified.

Byi Micro KP40512 details.

Two output filter solid state capacitors from Cloud Star, 470μF 25V, two parallel.

The protocol chip adopts cloud silicon semiconductor XPD977, and the 2A1C three-port output voltage is all controlled by this chip. XPD977 has passed the USB PD3.0 certification, TID: 5594. Support XPD-LINKTM multi-chip interconnect communication technology; Fast CHARGE protocols such as QC2.0/3.0/3.0+, AFC, FCP, SCP, HVSCP, PD and PPS are supported, and Xiaomi CHARGE TURBO 27W protocol and Huawei 10V high voltage SCP protocol are also supported.

The cloud Silicon XPD977 has an integrated 10mΩ VBUS channel power switch tube, and an integrated 10mΩ current detection resistor, and a built-in VPWR and VBUS dual discharge path. Support perfect protection function, save the number of peripheral components, simplify the circuit, reduce costs. In QFN5X5-32 package.

It is learned that cloud silicon semiconductor XPD series fast charge protocol chip has been used by dozens of products of Bull, Belkin, Lenovo, Nokia, Philips, Aogi, Bex, Pinsheng, Momis and other brands, seize 20-30W PD fast charge tuyair, Fuman Group Cloud Silicon Semiconductor PD protocol chip sales exceeded 10 million per month.

The USB-C base is welded to a vertical plate.

The USB-C base data pin is welded to TVS for electrostatic protection.



Two VBUS switch tubes are welded between two USB-A motherbases, from the power, model AP30P30Q, is a 30V PMOS, resistance 10mΩ, DFN3*3 package, used for interface output control.

Take it all apart. Get a family photo.

Charging head network disassembly summary

This socket converter can be installed on a wall three-socket, extending a single socket to a 2A1C fast charge output, as well as two new national standard five-hole and two new national standard two-hole outputs, equivalent to a jack board and a fast charger in one, easy to use and more tidy. USB-C fast charge support 30W output, and support PPS fast charge, charging compatibility for Apple and Android mobile phones are very good。

Through dismantling, the charging head network learned that the Chint socket converter adopts a modular design, and the internal socket module and the fast charging PCBA module are independent regional structures. The socket module is designed as a single copper bar and is connected by welding. Jacks are equipped with safety doors to prevent foreign bodies from being inserted, avoid electric shock, and ensure safety.

Fast charging module adopts KP22035 primary main control chip and KP40512 synchronous rectifier chip, the peripheral circuit of the chip is simple, high efficiency and comprehensive protection function. The output adopts cloud silicon XPD977 protocol chip, supports three independent fast charging, and the peripheral circuit is simple. The high voltage electrolytic capacitor inside the module comes from Ai Hua, and the output filter solid capacitor comes from the cloud star. The internal work is solid and the materials are reliable.