Apple since the iPhone 12 series mobile phone cancellation of the standard charger, 20W PD fast charging accessories market ushered in geometric growth, in order to cope with the growing market demand, the industry's well-known power chip company Chuangxin Micro from the beginning of 2020, it continued to increase investment in the research and development of PD fast charging source chip, and at the end of the year launched a set of high-performance, highly integrated, peripheral simplified power solution set CM1765 + CM1622, the application of only 32 peripheral devices can complete 20W The design of the PD fast charging source has won the favor of many power supply manufacturers as soon as the solution is introduced.
It is understood that at present, the Chuangxin micro CM1765+ CM1622 fast charging sleeve solution has achieved large-scale shipments, and has entered the fast charging source supply chain of well-known power supply manufacturers, which also shows that the parameters and indicators of the program meet the requirements of mass production, and the performance quality has also been recognized by power supply manufacturers.
Charging head network through the dismantling of the understanding, Chuangxin micro CM1765 + CM1622 fast charging sleeve solution has been adopted by Jindian Technology, based on the package scheme, Jindian Technology launched a 20W mini PD fast charger, the whole machine size is only 32.24mm× 31.45mm×31.4mm, very small and portable, and can support Apple 2.4A, Samsung 5V2A, DCP, QC2.0/3.0, AFC, FCP, Fast charging protocols such as SCP and PD3.0 meet the fast charging needs of a variety of mainstream brand mobile phones.
In order to achieve the mini body design, the 20W PD fast charger of Jindian Technology adopts the combined design of two PCB boards, and the internal component layout is very compact.
The PWM master chip of the charger adopts the Chuangxin Micro CM1765, which is a multi-mode controlled high-performance SSR power chip with a built-in 650V power MOSFET for offline switching power supply products within 20W. The CM1765 can operate in PWM, PFM, and Burst modes based on different control systems of input voltage, output voltage, and load to achieve full voltage range and optimal efficiency in the full load band.
The chip incorporates patented jitter and FM control technologies to simplify system EMI design. CM1765 has built-in a large number of compensation and protection functions, such as input voltage compensation, inductance compensation, ramp compensation, overcurrent protection, overload protection, VDD overvoltage protection, overtemperature protection, etc., thereby simplifying the peripheral circuit, facilitating PCB layout and EMI design, improving the reliability and safety of the program, and reducing the cost of the program.
Chuangxin Micro CM1622 is a high-performance synchronous rectifier chip that replaces the flyback switching power supply secondary rectifier diode to reduce rectification losses and improve system energy efficiency. The chip can operate in CCM, DCM, QR and other modes, highly integrated, and can achieve synchronous rectification function without the need for redundant peripheral components, thereby simplifying PCB design and reducing BOM cost.
Chuangxin Micro CM1622 integrates AC power supply, can support a wide output voltage range of 3V ~ 12V, suitable for fast charging applications, and can support both negative and positive rectification to meet the different needs of customers.
Charging head net summary
At present, Apple has implemented a strategy of not equipping chargers with standard chargers for two consecutive generations of iPhones, which has greatly stimulated the prosperity of the third-party 20W PD fast charging accessories market. After two years of development, the competition in the 20W PD fast charging source market has become white-hot, and how to make products more competitive has become the focus of power supply manufacturers.
Chuangxin micro for the 20W PD fast charging market launched this CM1765 + CM1622 set of solutions, first of all in terms of performance has passed the multi-party verification; secondly, in the simplified design is also obvious advantages, with two chips to get most of the functions of ac-DC power supply, the periphery only needs 32 devices, help to achieve the design of mini fast charging source; moreover, the highly integrated chip can accelerate the product listing cycle, save material costs and research and development costs, etc., to achieve high cost performance, Enhance the overall competitiveness of the product.