UC1875/6/7/8 UC2875/6/7/8 UC3875/6/7/8 UC3875是美国Unitrode公司针对相移谐振控制器方案推出的专用芯片. The UC1875 family of integrated circuits implements control of a bridge power stage by phase-shifting the switching of one half-bridge with respect to the other, allowing constant frequency pulse-width modulation in combination with resonant, zero-voltage switching for high efficiency performance at high frequencies. This family of circuits may be configured to provide control in either voltage or current mode operation, with a separate over-current shutdown for fast fault protection.