STMicroelectronics L6563S Manuals

This document is the L6563S PFC controller datasheet released by Infineon. The datasheet details the features of the L6563S PFC controller, such as tracking boost function, fast “bidirectional” input voltage feedforward (1/V2 correction), cascaded converter's PWM controller interface, remote ON/OFF control, accurate adjustable output overvoltage protection, protection against feedback loop disconnection (latched shutdown), inductor saturation protection, low (≤100µA) start-up current, 6mA max. operating bias current, 1% (@TJ=25°C) internal reference voltage, -600/+800mA totem pole gate driver with active pull-down during UVLO, SO14 package etc.

This application note presents a solution for designing a 400W fixed-off-time controlled PFC preregulator using the L6563S and L6563H. The solution utilizes peak current-mode control with fixed-off-time, combining the simplicity and affordability of TM operation with the high-current capability of FF-CCM operation.

This application note describes a demonstration board based on the transition-mode PFC controller L6563S and presents the results of its bench evaluation. The board implements a 400 W, wide-range mains input, PFC pre-conditioner suitable for ATX PSU, flat screen displays, etc. The chip is operated with fixed off time control in order to use a low-cost device like the L6563S, which is usually prohibitive at this power level. Fixed-off-time control allows continuous conduction mode operation, which is normally achieved with more expensive control chips and more complex control architectures.

AN2941 is an application note released by ST company, which mainly introduces the application characteristics of L6563S and L6566A two chips, suitable for 75W adapter design. This application note introduces the characteristics of the two chips, circuit principle, efficiency measurement, harmonic content measurement and function check.