LD7591 - Transition-Mode PFC Controller LD7591
Transition-Mode PFC Controller with Fault Condition Protection
Datasheet. P03 (for Internal Use Only)
The LD7591 is a voltage mode PFC controller operating on transition mode, integrated several functions of protection, such as OVP, OCP, and Brown-in protection. It minimizes the components counts and is available in a SOP-8 or DIP-8 package. Those make it an ideal design for low cost applications. It provides functions of low startup current, over voltage protection, open feedback protection, disable function, over current protection, under voltage lockout and integrated LEB of the current sensing. Also, the LD7591 features without mains voltage sensing compared with traditional current mode PFC for power saving. The LD7591 can be disabled if the INV pin voltage is lower than 0.45V and the operating current decreases to 65μA .
Transition mode of PFC pre-regulator Voltage mode control Programmable max. on-time Low Startup Current (<30μ