Foreword
The protocol chip is an indispensable and important part of the charger. It is responsible for communicating with the connected device, which is equivalent to a bridge connecting the device. The stability of the protocol chip plays a decisive role in the experience and reliability of fast charging.
Recently, Rockchip launched a protocol chip RK838 with a built-in Cortex-M0 core, which supports USB-A and USB-C dual-port fast charging, supports PD3.1, UFCS and various mainstream fast charging protocols on the market, and can realize The highest charging power is 240W, supports high-precision constant voltage and constant current control and ultra-low standby power consumption.
Rockchip RK838
Rockchip RK838 is a fast charging protocol chip that integrates USB PD3.1 and UFCS protocol core, equipped with a USB-A port and a USB-C port, supports A+C dual output, and both channels support UFCS protocol . UFCS certificate number: 0302347160534R0L-UFCS00034.
RK838 adopts MCU architecture, internally integrates Cortex-M0 core, 56K large-capacity flash storage space, 2K SRAM space to realize PD and other proprietary protocols, and users can realize multi-protocol code storage and various custom protection functions.
When it comes to high-power fast charging, it is naturally inseparable from high-precision voltage regulation. RK838 supports constant voltage output of 3.3-30V, and can realize constant current support of 0-12A. When the constant current is within 5A, the error is less than ±50mA.
RK838 also has built-in comprehensive protection functions, among which CC1/CC2/DP/DM/DP2/DPM2 pins all support 30V withstand voltage, which can effectively prevent damaged data lines from causing product damage, and support rapid shutdown of output after overvoltage. The chip also has built-in overcurrent protection, overvoltage protection, undervoltage protection and overheating protection to ensure safe use.
Post time: May-09-2023