CM6565

CM6565 Noise Free 16 pin Self-Start Interleaved PFC with 180 Degree Phase Shift CRM PFC Controller for 90+/85+ GENERAL DESCRIPTION The CM6565 is the industry first 16 pin self-start interleaved ‹ PFC with 180 degree phase shift CRM PFC controller for total power supply system efficiency greater 90% or 85%. ‹ The CM6565 is like a combination of two 180 degree ‹ phase shift CM6561s plus a lot of light load efficiency boost ‹ functions. CM6565 gives the best noise free performance of ‹ the offline power supply. The desired frequency range for ‹ each PFC controller should be above 35KHz. ‹ ‹ Mismatches between two boost converters for the ‹ interleaved PFC can be less than +/-5%. Basically, it is like two 6561s work together with 180 ‹ degree phase shift plus light load improvements. ‹ 1. IAC (pin 1), Multiplier input pin: Current input instead of Voltage input; it will enhance input current THD and the ‹ system will be less sensitive to the noise. The system can reduce one resistor between ground and IAC, multiplier ‹ input pin. 2. IAC (pin 1), Multiplier input pin: During the start up ‹ condition (the VCC is less than UVLO, 13V), IAC is ‹ connected to VCC, and the RAC resistor (between VIN pin and IAC pin) serves as a bleed resistor. Once the VCC is ‹ greater than UVLO, then, RAC resistor provides the sine wave current from VIN pin to IAC pin. After VCC is greater ‹ than UVLO, the voltage of the IAC pin is around 1.4V. Therefore, the RAC resistor can be served...