Come and watch! Belkin dual C port 40W fast charging and dismantling machine! This charger features two sets of CX7527+CX7538B to support it! Both dual C ports support 20W independent fast charging, which can meet the requirements of fast charging for two Iphone12 devices simultaneously! The overall exterior of the product is simple, and the entire design is quite exquisite!

Welcome the factory to come and request samples!

1、 Appearance of Belkin 40W dual C-port fast charging charger

Quick charging and dismantling machine: Belkin 40W dual C-port fast charging using CX7527+CX7538B

The Z major advantage of this charger is that both USB-C ports can support iPhone 12 20W fast charging, and the output does not power down at the same time. It can meet the needs of two iPhone 12 20W fast charging at the same time, and is suitable for user groups such as dual holders or male and female friends.

The parameter information of the product marked on the input casing

Model: WCB006yz 60813

Input: 100-240V 50/60Hz 1A

USB-C1/C2 output: 5V3A, 9V2.22A

The product has passed CCC certification.

Use ChargerLAB POWER-Z KT002 to detect that the USB-C port supports Samsung 5V2A, DCP protocols, and PD3.0 fast charging protocols.

In addition, the PDO message shows that the C port also has two sets of fixed voltage ranges, 5V3A and 9V2.22A.

In addition, using KT002, the output protocol of the other C port is the same, and the PDO message is also the same. That is, the performance of the two C ports is exactly the same, both supporting 20W fast charging, and can be blind plugged or simultaneously charging two iPhones 12 with 20W fast charging. The total output is 40W without power loss.

2、 Disassembly of Belkin 40W dual port fast charging charger

At the front of the PCB board, there are two transformers and two independent switching power circuits, which is also the reason why this charger can simultaneously output 20W without power loss.

At a glance at the back of the motherboard, the optocoupler and SMD Y capacitor span the first stage. The two switch power supply circuits have the same scheme and high integration, making the back of the motherboard quite simple.

List of input terminals, equipped with delay fuses, common mode inductors, NTC surge suppression resistors filtering capacitors, and other devices.

There are two transformers in the middle of the motherboard, and the two USB-C mother bases at the output end are welded to the small board. In addition, there are two sets of output filtering solid-state capacitors that are fixed with glue.

The main control chip of the charger adopts CX7527, which is a current mode PWM control chip with built-in 650V high-voltage super silicon. It is applied to solutions with power below 20W, and operates at a fixed switching frequency in PWM mode. This frequency is precisely set internally, and the working frequency is adjusted internally by the IC during no-load or light load.

CX7527 can operate in green mode to reduce losses during light loads and improve the overall efficiency of the machine. Only a small current is required during startup and operation, and a large resistor can be used in the startup circuit to further reduce power consumption during standby. The chip is equipped with a slope compensation circuit, which avoids the occurrence of subharmonic oscillations and improves system stability when the circuit operates at a large duty cycle.

CX7527 has a built-in Leading edge blanking time, which eliminates the impact of diode reverse recovery current in the buffer network on the circuit. It adopts frequency jitter technology, which can effectively improve the EMI performance of the system. The system's hopping frequency is set above audio (22KHz), which can avoid system noise during operation.

CX7527 is equipped with various built-in protections, including cycle by cycle current limiting protection (OCP), overvoltage protection (VDD OVP), VDD overvoltage clamping, undervoltage protection (UVLO), over temperature protection (OTP), and secondary transistor short circuit protection. The EMI characteristics of the system can be better improved through the internal soft drive structure.

Quick charging and dismantling machine: Belkin 40W dual C-port fast charging using CX7527+CX7538B

The secondary synchronous rectification chip adopts CX7538B, which is a high-performance secondary synchronous rectification chip with built-in MOS. It is suitable for isolated synchronous rectification applications, especially for high efficiency requirements in chargers, and is compatible with isolated CCM, DCM, QR control applications.

CX7538B adopts the technology of opening the original edge and intermittent judgment of the secondary edge, which can effectively avoid the misoperation of the driving chip caused by excitation oscillation; Adopting unique VDD power supply technology can ensure that the chip will not operate under power under both constant current and constant voltage operating conditions of the primary control system.

Summary:

The body shell of Belkin's 40W dual C port fast charging charger is frosted, with curved transitions on both sides and foldable pins, making it easy to carry and comfortable to use. Both USB-C ports support the USB PD3.0 fast charging standard, with voltage ranges of 5V3A and 9V2.22A. They mainly focus on iPhone 12 20W fast charging, while the dual ports simultaneously charge 20W fast. The targeted design is very prominent. Dual port support for power blind insertion, easy to use.

Through disassembly, it was learned that this charger has two identical switching power supply circuits inside, and also shares an input filtering and rectification circuit. Both switching power supply circuits adopt the high integration scheme of Chengxin Micro CX7527+CX7538B, which shows Belkin's recognition of Chengxin Micro Fast Charging Scheme.

The CX7527+CX7538B highly integrated fast charging solution can greatly simplify the peripheral devices of the circuit. The Belkin charger is a good example of Z, even if it integrates two switch power circuits, the front and back of the charger motherboard are very simple and clear, which is very helpful for engineers to design a fast charging product. At the same time, it also has advantages in cost and production cycle.