Preface
I don't know what readers and friends look for when buying GaN fast charging? Is it to choose a brand or to choose a cost-effective price? Or do you choose a product with more performance and rich interfaces? Maybe it's the chic exterior design that touches your heart. But in any case, although the performance of fast charging products of 100 watts and above is stronger, due to the need to consider factors such as PFC circuit design, their costs and prices are often higher, and the price of many products is several hundred yuan. At this time, we might as well focus on the gallium nitride fast charging products in the power segment of about 65W, Xiaobian believes that the current power segment products are relatively balanced, basically the price, volume and performance of the "sweet spot", 100 yuan or even less than 100 yuan can choose the right fast charging products.
The application of the primary main control chip in 65W multi-port fast charging
Recently, when the charging head network sorted out the dismantling cases in recent months, it was found that the 65W power section multi-port fast charging uses flyback controllers to form a switching power supply to weigh the cost and performance requirements. The editor will summarize some of the parameters of a variety of chips in the article into a table for your current reference, and the editor will introduce it to you in detail in specific circumstances.
The cases in the article are listed in no particular order, in alphabetical order by brand.
onsemi NCP1342
The onsemi NCP1342 is a high-frequency flyback quasi-resonant primary PWM controller that NCP1342 uses a fast frequency foldback mode with no-load power consumption of less than 30mW. The chip has built-in active X2 capacitor discharge, supports a wide range of Vcc power supply, supports external thermistor for overheating protection and multiple perfect protection functions, and is available in SOIC-9 and SOIC-8 packages.
Application examples
Denxiaoku Bluetooth version 65W dual USB-C gallium nitride charger
This 65W GaN charger is designed in a long cylindrical shape and is equipped with national standard folding pins, which is easy to carry and store. The charger has two USB-C ports, both of which support 65W power output, and supports 45+18W power distribution strategy, which can meet the fast charging needs of computers and mobile phones at the same time. The charger also supports Bluetooth connection, and the output voltage and output current of the charger can be checked through the mobile phone APP, and the charging status of the device can be understood in real time.
Related Reading:
Teardown report: Dian Xiaoku Bluetooth version 65W dual USB-C gallium nitride charger
Dongke DK065G
Dongke DK065G is a gallium nitride encapsulated chip, which integrates a gallium nitride switch with 650V withstand voltage and 260mΩ conduction resistance, and integrates a high-performance flyback controller, adopts QR working mode, and supports valley opening to reduce losses. By integrating the switch tube and controller into a single chip, the design of the flyback adapter is greatly simplified. DK065G has complete protection functions, supporting output over-voltage protection, power supply over-voltage, under-voltage protection, over-temperature protection and other protection functions, and is available in DFN8×8 packages.
Application examples
Anker 65W 2C1A GaN Charger
Anker's 65W GaN charger has a long body design with folding pins for easy daily storage and carrying. The charger has a 2C1A output interface, USB-C1 and USB-C2 both support 65W PD fast charging and PPS fast charging, and the USB-A port also supports fast charging, which has very good compatibility, and one charger can meet the fast charging needs of most electronic devices in life.
Related Reading:
Teardown Report: Anker 65W 2C1A GaN Charger
华源智信HY1658L
Huayuan Zhixin HY1658L is a primary main control chip, which is an intelligent digital multi-mode flyback controller, the chip integrates high-voltage start, and supports automatic switching between multiple working modes to balance switching loss and conduction loss. Built-in jitter improves EMI performance, an adaptive gate driver balances switching losses and EMI, and the drive output voltage clamp is 12V.
HY1658L has perfect protection functions, supporting output over-voltage protection, power supply over-voltage protection, transformer magnetic saturation protection, under-voltage/over-voltage protection, overload protection, chip over-temperature protection and current sampling resistance open-circuit protection. Suitable for USB PD chargers, TV/monitor standby power supplies and notebook power supply applications in SOP7L package.
Application examples
Nothing CMF 65W氮化镓充电器
Nothing CMF's GaN charger features a stamp-gauge fixed prong and a black straight body design. The output power of the charger is 65W, supports 200-240V input, and has a 2C1A output interface. Two of the USB-C ports support 65W fast charging, support power blind plugging, support power blind plugging when the two interfaces are used at the same time, and the measured charger also supports PPS fast charging, which has good fast charging compatibility.
Related Reading:
拆解报告：Nothing CMF 65W 2C1A氮化镓快充充电器
Nanxin Technology SC3021C
Nanxin Technology SC3021C is a high-frequency quasi-resonant flyback controller that can directly drive gallium nitride to meet all kinds of high-frequency QR fast charging needs. SC3021C proprietary GaN direct-drive design, eliminating the need for external drivers or discrete drive devices. Integrated segmented power supply mode, single winding power supply, no need for complex power supply circuits. Built-in high-voltage start-up and AC input Brown In/Out function, integrated X-cap discharge function. SC3021C supports up to 170KHz operating frequency, is suitable for wound transformers, and is available in SSOP10 package.
Application examples
Mefuda 65W 2C1A GaN Fast Charger
This 65W charger has a 2C1A output port and is equipped with American Standard folding pins. There is no product information on the charger body. The two USB-C ports of the tested charger support 65W output power, and support PD and PPS fast charging, which meets the needs of fast charging of laptops and mobile phones.
Related Reading:
Teardown report: Mefuda 65W 2C1A GaN fast charger
MOST INN4575F
The PI INN4575F is an InnoSwitch4-Pro series power supply chip, which operates in quasi-resonant mode, and has a very high level of integration with a PWM controller, gallium nitride switch and synchronous rectification controller. The chip has an I2C interface to achieve accurate constant voltage, constant current and constant power control, supports dynamic adjustment of output voltage and output current, and provides InSOP-T28D package.
Application examples
Greenlink 65W 2C1A GaN Charger
This 65W GaN charger adopts a sectional cylindrical design, and the word 65W is marked on the side of the fuselage to facilitate the identification of the charger output power. The charger is equipped with folding prongs for easy daily carrying and storage. The charger has a 2C1A port, two USB-C ports support 65W fast charging output, and the USB-A port supports 22.5W fast charging.
Related Reading:
Teardown report: Greenlink 65W 2C1A GaN charger
Zhirong SW1106
Zhirong SW1106 is a high-frequency flyback quasi-resonant controller that supports enhanced GaN switch direct drive, and integrates a 700V high-voltage start-up circuit and X-capacitor discharge function inside the chip. The GaN driver is integrated into the chip with a drive voltage of 6V, which can directly drive the enhanced GaN switch.
The SW1106 runs in valley-on mode with valley lock, and integrates frequency jitter to optimize EMI performance and supports burst mode. The power supply adopts dual VDD power supply design, which reduces the power loss of the controller in the case of wide output of output voltage USB PD. The chip integrates input voltage protection, power supply overvoltage protection, output overvoltage protection, cycle-by-cycle current limiting, overload protection, output overcurrent protection, current sampling resistor open circuit and short circuit protection, built-in overtemperature protection on the chip, supports external thermistor for device overtemperature protection, comprehensive protection functions, and provides SSOP-10 package.
Application examples
Baseus 65W 1A1C GaN Charger
Baseus's GaN charger has a long cylindrical design with fixed European pins and a simple design. The charger has a 1A1C output interface, a single output power of 65W, and supports a 45+18W power distribution strategy, which can meet the fast charging needs of computers and mobile phones at the same time.
Related Reading:
Teardown report: Baseus 65W 1A1C GaN charger
Summary of the charging head network
In general, consumers generally prefer multi-port adapters that are moderately bulky, easy to carry, and affordable. Compared with the LLC controller, which is more widely used in high-power fast charging, the flyback controller in this paper can work at high frequency, which can effectively reduce the circuit size, improve efficiency and reduce electromagnetic interference, and compared with the LLC controller, the flyback controller has a simpler design and lower development and manufacturing costs.
In addition, chip manufacturers are also constantly reducing the number of peripheral components by improving chip integration and enriching product functions, which can also reduce the board space of peripheral devices on the premise of effectively reducing the adverse effects of parasitic parameters, helping manufacturers weigh cost, volume and product performance, and bring more profit margins to manufacturers.
Some of the information in the article comes from the Internet, and is affected by the timeliness of the case, please forgive me if there are any omissions.