CM6561A
CM6561A is No Bleed Resistor 8-PIN Transition Mode SINGLE PFC manufactured by Champion.
DESCRIPTION
The CM6561A is pin to pin patible with L6561 and L6562. There are several important improvements:
1. IAC (pin 3), Multiplier input pin, Current input instead of Voltage input; it will enhance input current THD and the system will be less sensitive the noise. The system can reduce one resistor between ground and IAC, multiplier input pin. 2. IAC (pin 3), Multiplier input pin: During the start up condition (the VCC is less than UVLO, 15V), IAC is connected to VCC, and the RAC resistor (between VIN 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 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 as a bleed resistor. Usually, the value of the RAC is from 800K to 5Meg ohm. 3. IAC...
