uc chip means power management chip
UC3842, TL494, SG3525 are very classic three PWM control chips, especially as the classic peak current mode single-ended PWM controller UC3842, an early batch of switching power supply engineers are from this chip started, since then into the switching power supply industry. The UC3842 was originally a product of Unitrode, which developed a series of UC384X products, and TI acquired Unitrode and kept the original product selection.
uc chip is a high performance power output current control chip produced by an American company.
Refers to the circuit board containing UC high frequency switching power supply control chip