Consumer electronics products have been present in every aspect of our daily life and work. We use more and more devices in common use: smart phones, tablet computers, smart wearable devices, etc. There are many different charging interfaces, which is very inconvenient for consumers.
In order to benefit consumers, the European Union and China's Ministry of Industry and Information Technology have begun to require the market to unify the interfaces of all consumer electronic products into Type-C ports. However, Apple developed earlier and basically adopted self-developed technology and has always used the Lighting interface. For Apple users, a charging cable that can combine the Lighting interface and the Type-C interface can directly reduce the number of data cables used, greatly facilitating the charging management of daily electronic products. At the same time, it can also make full use of the fast charging head to alleviate the situation of full sockets during charging.
One to two fast charging cable
A good fast charging cable must have three characteristics: high efficiency, good adaptability, and safety and reliability, and these characteristics are closely related to the chip it chooses. Ruimingwei XC1203 one-to-two fast charging cable uses the TMI2283QE synchronous buck converter, which has an efficiency of up to 94%, a wide voltage input (4.5V~30V), and integrated multiple protection functions. It can meet the three characteristics required by the above fast charging cable, and can be adapted to a variety of PD charging heads and has a strong output load capacity.
This fast charging cable has a USB-C input, supports a maximum power of 100W, and has a USB-C output + Lightning, which can meet the needs of charging laptops and Apple phones at the same time, maximize the use of output power, and shorten the charging time. In addition, through the built-in control chip of the cable, 73+27W power distribution control is achieved, supporting 65/40/22.5W power charger applications, and can be connected to a computer for data transmission.
Disassembling Ruimingwei XC1203 one-to-two fast charging cable
A control chip, LED indicator, switch and two VBUS switch tubes are soldered on the back of the Ruimingwei one-to-two fast charging cable.
The following figure shows the synchronous buck converter built into Ruimingwei's one-to-two fast charging cable, which is from Toulwei, model TMI2283QE.
TMI2283QE has a built-in switch tube, supports 4.5V to 30V input voltage, built-in soft start function, supports PFM mode, can achieve 100% duty cycle, and has input overvoltage protection, overtemperature shutdown and other protection functions.
Strong heat dissipation capability: The output current can reach 3.5A at 5V, the operating frequency is adjustable, and the efficiency of TMI2283QE is as high as 94% at 5V/3A output, which can effectively reduce losses and optimize heat dissipation.
Small size: The package form is SOP8, and it has built-in P-MOS+N-MOS path driver, which saves peripheral devices and reduces costs;
Applicable scenarios: car charger, adapter, mobile power supply and other applications.
Features:
Input voltage range: 4.5V to 30V;
The output current can reach 3.5A at 5V;
High efficiency: up to 94% (@5V/3A);
Working mode: PFM mode;
Adjustable operating frequency: 120kHz to 380kHz;
Input overvoltage protection;
Soft start function;
Thermal shutdown protection;
100% duty cycle can be achieved;
Package: SOP8;
As shown in the figure below, a 22μH alloy inductor is used with TMI2283QE to reduce the voltage.
The main control chip is an 8-bit CMOS MCU with 32 KB of flash memory and a built-in UFC interface block for data line power distribution control.
The following figure shows the step-down chip that powers the main control chip, with CAAA printed on it;
The following are analog switches with silkscreen S7B.
The picture below shows an analog switch with silkscreen 2227;
The following is the VBUS switch tube for USB-C interface output, silk screen 15P03.
The following figure shows two VBUS switch tubes with silkscreen 30P7A, which are used to switch between the Lightning interface step-down output and direct output.
Disassembly summary
Ruimingwei's one-to-two fast charging cable adopts a small board design. The small board is welded with USB-C input and corresponding output wires, which can realize the functions of a multi-port charger and two charging cables, meeting the simultaneous fast charging needs of two devices.
Toulwei's TMI2283QE step-down converter is used for Lightning interface step-down output. It has built-in input overvoltage protection and over-temperature shutdown protection to provide high safety for the port.
In addition to the above products, Toer Microelectronics currently has a variety of power management chips, single C and A+C and other fast charging protocol chips, which have formed a full set of solutions and can provide customers with one-stop high-quality services. Toer Micro insists on being customer-oriented, providing a full set of solutions and professional technical support services, and can provide customized and serialized solutions according to customer requirements.
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