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The SD4947 is a DC-DC converter control chip for buck switching power supplies, driving external MOSFETs. The SD4947 features integrated high-voltage supply for fast startup, adaptive frequency reduction to further optimize conversion efficiency under light load conditions, and built-in frequency dithering to optimize EMI. The SD4947 also integrates various abnormal state protection functions, including: cycle-by-cycle peak current protection, VDD overvoltage protection, undervoltage protection, output overload protection, output overvoltage protection, and overtemperature protection.
Dual-channel built-in power MOS full-bridge driver; supports forward, reverse, stop, and braking functions; ultra-low standby and operating current; low on-resistance (1.6Ω).Max continuous output current up to 1.8A per channel, with a peak of 2.5AWide operating voltage range Available in SOP-16 package
The CH32V003 series is an industrial-grade general-purpose microcontroller based on the Qingke RISC-V2A core. It supports a 48MHz system clock frequency and features wide voltage range, single-wire debugging, low power consumption, and an ultra-small package. It provides commonly used peripheral functions, including one DMA controller, one 10-bit analog-to-digital converter (ADC), one operational amplifier comparator, multiple timers, and standard communication interfaces such as USART, I2C, and SPI. The product has a rated operating voltage of 3.3V or 5V and an operating temperature range of -40℃ to 85℃ (industrial grade).
The BP3286J is a high-efficiency, high-PF LED driver chip that supports SCR dimming. Operating in inductor current critical continuous mode, it is suitable for Buck-Boost LED driver power supplies. The BP3286J integrates a 600V power switch and employs a patented gate drive and high-voltage power supply method, requiring very few external components to achieve excellent constant current characteristics, significantly reducing system cost and size. The BP3286J features multiple protection functions, including LED open-circuit protection (overvoltage protection), LED short-circuit protection, and chip temperature overheating regulation. The BP3286J is packaged in an SOP-8 package.