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Preface. Recently, Zhanrong has once again developed a new solution for the power adapter to support PD30 30W gallium nitride charging head, there are two interfaces: A+C. This solution uses the main control sealed gallium nitride SW1123 + synchronous SW1655+ protocol CR6126AQ.
SW1123 is a highly integrated and high-performance PWM converter with built-in high-voltage start-up, power-down detection, capacitive discharge and protection functions. The SW1655 is a high-frequency, high-efficiency synchronous rectified power switch with integrated N-channel MOSFET, conduction detection, and passive pull-down. The CR6126AQ supports a variety of protocols, A+C dual port co-charging, 5V, over-temperature and over-voltage protection, and inserts a protocol chip for intelligent identification.
Specifications and product drawings.
aerospace day
The layout of the scheme is neat and clear, from the front of the module, the small yellow place at the bottom is the fuse and common mode inductor, the high-voltage filter capacitor is welded above, the transformer is welded in the middle, the left board is the protocol board, and the output filter capacitor is next to the A port under the yellow sharp corner of the transformer. On the back is the rectifier bridge, and the primary stage is slotted and placed in the isolation plate, which contains the main control SW1123 + synchronous SW1655 chip.
There are two interfaces in this solution, namely A port and C port.
The following are the specifications of the three chips:
SW1123 encapsulated gallium nitride.
The SW1123 is a high-performance quasi-resonant mode flyback converter with integrated gallium nitride with 700V high-voltage start-up circuitry, line voltage power-down detection, X-capacitor discharge, valley lock-down mode, and integrated frequency jitter for improved EMI performance. It has multiple protection functions and is suitable for a wide range of applications such as adapters, chargers, and AC-DC switching power supplies.
SW1655 synchronous rectification.
The SW1655 is a high-performance synchronous rectified power switch with integrated N-channel MOSFETs for improved system efficiency. It supports a wide voltage range, a variety of working modes, intelligent on-on detection function and strong pull-down current capability, which can reduce the voltage stress of the rectifier tube, and also has a passive pull-down function to effectively prevent misleading on-on phenomenon. This makes the SW1655 suitable for high power density applications.
CR6126AQ protocol chip.
CR6126AQ is a chip of Zhanrong CR series, which is used for charging management. It can intelligently identify the type of mobile phone, is compatible with a variety of charging protocols, supports constant voltage and constant current charging, has high voltage resistance, reliability, and provides multiple protection functions. The power supply range is wide, adapting to various fast charging protocols, and users can configure it according to their needs. Housed in a convenient QFN3X3-20L package, the chip is suitable for a wide range of charging solutions.
Product testing. Protocol testing
Use a decoy to trick the charging head into the protocol of the two interfaces.
A-port protocol detection:
The supported protocols are as follows: BC12 mode, apple24a、afc、fcp、scp、qc3.0 etc.
C-port protocol detection:
The following protocols are supported: PDW PPS, BC12 mode, apple24a、vooc、qc2.0/3.0, AFC, SCP, etc.
PDO supports voltage and current detection:
PDO supports a maximum voltage of 20V15A, 15V2A, 11V3A power 30W output.
Charge test
Charge the iPhone 11 at the A port
Voltage 525V, current 144a, power 756w。
Charge the iPhone 14 Pro at Port A
Voltage 525V, current 145A, power 761w。
Charge the vivo X6 at port A
Voltage 524V, current 126a, power 66w。
A port to charge the Xiaomi 12S Pro
Voltage 952V, current 218a, power 2075w。
Charge the Huawei Mate30 at Port A
Voltage 911V, current 230A, power 2097w。
C-mount to charge the iPhone 11
Voltage 529V, current 154a, power 818w。
C port to charge the iPhone 14Pro
Voltage 921V, current 119a, power 1106w。
C port to charge vivo X6
Voltage 918V, current 067a, power 614w。
C port to charge the Xiaomi 12S Pro
Voltage 925V, current 174a, power 1614w。
Charge the Huawei Mate30 at the C port
Voltage 916V, current 240A, power 22W.
Maximum load test
The maximum load capacity of the A port is at a power of 3342W, voltage 1193V, current 28a。
The maximum load capacity of the C port is 3203W, voltage 2001V, current 16a。
Summary. This GaN charging head solution supports PD30, up to 30W power output, powerful, simple and efficient, support 20V output, can charge laptops, and support 33WPPS fast charging, charging compatibility for Android and Apple mobile phones is very good.
From encapsulated gallium nitride to synchronous rectifier controller to protocol management chip, Zhanrong Electronics solves the difficulty of fast charging of gallium nitride chargers and provides more support for solution selection.