If you’ve ever cracked open a budget-friendly Bluetooth speaker, a portable power bank with wireless charging, or a small LCD display module, you’ve likely spotted a nondescript black blob or a small QFN chip labeled .
This board is designed to convert high-voltage AC input into a regulated DC output for brushed motors: 230 VAC (50/60 Hz). Output Voltage: 0–180 VDC. Rated Current: 12 ADC. jymc220bi schematic 2021