To ask which multi-port fast charging chip is stronger? Perhaps people in the industry will invariably think of Zhirong Technology. Judging from the current disassembly data analysis of the charging head network, Zhirong chip does have a very high share in the multi-port fast charging market, and has also received unanimous praise from the market.
In addition to continuing to maintain the technical advantages of multi-port buck fast charging chips, Zhirong Technology has successively launched a protocol chip SW2325 using ARM Cortex M0 architecture this year, and a 100W bidirectional buck-boost chip SW7203. Among them, SW2325 is not only compatible with a variety of fast charging protocols, but also supports multiple online burning, which can be applied to chargers, car charging and other fields; SW7203 can be used for 100W car charging, mobile power, charger and other fields.
In the recent past, Zhirong Technology has launched a 65W 1A1C fast charging source solution based on SW2325, SW7203 and SW2303, which supports online modification of PDO, which can not only achieve a single port maximum 65W output, but also achieve dual-port output intelligent power distribution without external MCU.
First, Zhirong 65W 1A1C fast charging reference design appearance
Zhirong this new 65W 1A1C fast charging scheme, in the power architecture is selected is the switching power supply + protocol chip control output, AC-DC part can be arbitrarily matched, Zhirong is mainly responsible for the two interfaces of the fast charging protocol identification and power intelligent distribution, and do not need to use the external MCU.
This set of schemes is equipped with a set of QR architecture Gallium nitride switching power supply, in order to achieve high density characteristics, the overall design of the scheme is relatively compact, the internal use of a plurality of PCB board design, make full use of space.
The main PCB board of the charger is listed, and the AC-DC switching power supply control circuit is mainly laid out.
The length of the measured PCB board is about 53.3mm.
The width of the measured PCB board is about 26.17mm.
The thickness of the measured PCB board is about 24.11mm, and the power density reaches 1.93W/cm³.
After the shell is put on, the size of this 65W 1A1C fast charger is only 65.35mm× 30.86mm×30.91mm, and it is still a folding pin design, and its power density exceeds 1W/cm³, which is very rare in dual-port chargers.
Zhirong 65W Gallium Nitride Dual-Port Fast Charge Volume compared to Huawei's 66W Gallium Nitride Multi-Port Charger, the former shell size is slightly longer, but equipped with folding pins, easy to store.
Second, the introduction of the core chip
As mentioned earlier, this program is based on the high-frequency QR GaN fast charging architecture, and its core power device on the primary side comes from GaNext Future, model G1N65R240PB. Together with ON Semiconductor's NCP1342 and synchronous rectifier circuit, it forms a classic gaN fast charging source.
The USB-C port in the output section is controlled by Zhirong's new protocol chip SW2325. This is a very compatible fast charging protocol controller, built-in 40MHz frequency ARM M0 core, built-in car grade 64K eFlash + 4K RAM. Supports an ultra-wide input voltage range of 3-30V. It supports three voltage regulation modes of optocoupler feedback, FB feedback and I2C feedback, and supports I2C/UART universal peripheral interface to support secondary development.
The Zhirong SW2325 integrates the detection circuits of type-C interface logic, USB PD PHY, VOOC/SCP PHY, and QC/PE/SFCP/TCN, and integrates optocoupler feedback and FB feedback driver circuits, NMOS and PMOS driver circuits, and CV/CC control loops.
Not only that, Zhirong SW2325 has also passed THE USB PD3.0 and PPS fast charging certification, and supports the protocol of UFCS convergence fast charging specification.
The USB-A interface is a step-up and drop-up output, and the Zhirong SW7203 is used as the buck-boost chip. This is a high-efficiency synchronous 4-tube bidirectional buck-boost charge-discharge controller, supporting 1-4 battery charge and discharge management, supporting NVDC function, can provide a maximum of 100W power output, support multiple input and output detection and path drive, with MCU and protocol chip can form a simple and complete bidirectional fast charge and discharge scheme.
Detailed specifications of Zhirong SW7203.
At the same time, the A port also adopts a Zhirong SW2303 as a protocol chip, which can support mainstream fast charging protocols such as PD, QC, FCP, high and low voltage SCP, AFC, SFCP and PE, and supports two working modes of optocoupler feedback and FB feedback. Together with AC-DC or DC-DC and a small number of peripheral components, a complete high-performance Type-C/Type-A fast charging solution is formed.
Detailed specifications of Zhirong SW2303.
Third, the full protocol, intelligent power reduction
The full protocol is a consistent feature of Zhirong fast charging chips, and the same is true of this 65W 1A1C fast charging reference design. Using the Chargelab POWER-Z KT002 to detect the fast charging protocol of the USB-A interface, the display supports Apple 2.4A, Samsung 5V2A, DCP protocol, as well as AC3.0/2.0, AFC, FCP, SCP, VOOC, PE and other mainstream fast charging protocols.
The fast charging protocol of the USB-C interface is more abundant, in addition to all the fast charging protocols of the A port, it also supports QC4+, SuperVOOC, PD3.0 PPS and other protocols.
In terms of intelligent power reduction, the Zhirong 65W 1A1C Gallium Nitride fast charging reference design is connected to the power supply, and in the case of single port output, the maximum output power of the USB-C interface can be measured by using the ChargerLAB POWER-Z KT002 to be 65W. Support 5V3A, 9V3A, 12V3A, 15V3A, 20V3.25A five sets of fixed voltage gears and 5-21V3.25A PPS voltage gears.
When the USB-A interface connects the device, the charger can realize 18W fast charging and power supply. At this time, the output PDO of the USB-C interface is updated to 5V3A, 9V3A, 12V3A, 15V3A, 20V2.25A and 5-21V2.25A, the maximum output power is 45W, and the total power of the dual port is 63W.
Fourth, support multiple repeated burning
The advantage of secondary programming is that when the fast charger is in the mass production stage or has been mass-produced, once it encounters an unexpected situation that needs to modify the chip's protocol or adjust other internal programs, it can easily achieve the purpose of updating the firmware without destroying the charger shell or using complex programming equipment, so as to avoid the loss of the fast charging manufacturer. The following is a piece of the secondary burning process of Zhirong SW2325:
Step 1: Connect the Zhirong 65W 1A1C fast charging reference design to the power supply, and the C port supports the maximum output of 65W.
Step 2: Unplug the tester, connect the portable recorder of Zhirong Technology, and power it with a 5V power supply, and press the button to achieve one-key programming.
Step 3: When the PDO of the C port is detected again, it shows that the maximum output power has been updated to 30W, the programming is successful, and the 65W charger is magically changed to a 30W charger.
Through the demonstration, it can be seen that when the Zhirong 65W 1A1C reference design is output in a single port, the PDO message of the C port supports the maximum output of 65W output, and in the case of not opening the charger shell, the secondary programming is carried out by using the special programming tool of Zhirong, and the PDO message of the C port is detected again, and the maximum power becomes 30W. Successfully verified that the Zhirong SW2325 fast charging protocol chip supports secondary programming.
5. Compatibility testing
Finally, let's take a look at the fast charging compatibility of the Zhirong 65W 1A1C fast charging source:
Charge the iPhone13 Pro Max, the maximum power measured can reach 26.7W, and enter the USB PD fast charge mode.
Charge the iPhone13 Pro, the maximum charging power is about 22.5W, enter the USB PD fast charge mode.
Charge the iPhone12 Pro max with a maximum charging power of about 23.1W and enter usb PD fast charging mode.
Charge the Nubia Z30 Pro, reach 56W power, and enter PPS fast charging mode.
When charging the Samsung S20 Ultra, the charging power is about 29.8W, and the charging performance is comparable to the original charger.
Charge the Xiaomi Mi 11 Pro with about 28.3W of power.
Charge the Meizu 18 Pro with a power of about 29.1W.
Charge the Huawei Mate40 Pro with about 20.7W.
Huawei P40 Pro, charging power is about 21W.
Charge the OnePlus 9 Pro with about 17.2W of power.
Charge the Red Devil 6 Pro with about 56.1W.
The iQOO 8 Pro is charged and has about 17.4W of power.
Charge the OPPO Reno6 Pro with about 24.8W of power.
Charge the iPad mini6 with about 17.4W of power.
Charge the iPad Pro with about 32.3W of power.
Charge Apple's MacBook Air at about 45.6W.
Charge the 13.3-inch MacBook Pro with about 57.7W of power.
Charge the 16-inch MacBook Pro 2021 with around 58.4W of power.
According to the charging test results, the 65W gallium nitride fast charging scheme equipped with the Zhirong SW2325 fast charging protocol chip can achieve fast charging speed for mainstream mobile phones, laptops and tablets.
Charging head net summary
Zhirong's latest set of 65W 1A1C dual-port fast charging scheme adopts a new design, of which the USB-C interface output omits the DC-DC conversion circuit, directly has SW2325 control, compared to the traditional secondary buck scheme, the overall efficiency of the power supply is higher; USB-A port output is sw7203 + SW2303 buck voltage scheme, the three chips can work together without the help of external MCUs, simplifying the peripheral circuit design.
Thanks to the powerful performance of SW2325, this 65W 1A1C fast charging solution can not only achieve full protocol compatibility, but also support multiple flashing, only a simple step can complete the redefinition of PDO, for the current fast charging market complex and changeable environment, product adaptability is stronger.