Document
CM6807
10-PIN Green-Mode PFC/PWM Combo CONTROLLER for High Density AC Adapter
GENERAL DESCRIPTION
FEATURES
The CM6807 is the Green-Mode PFC/PWM Combo
controller for High Density AC Adapter. For the power
supply less than 200Watt, it’s input current shaping PFC
performance could be very close to the performance of the
CM6800 or ML4800 leading edge modulation average
current topology.
CM6807 offers the use of smaller, lower cost bulk
capacitors, reduces power line loading and stress on the
switching FETs, and results in a power supply fully
compliant to IEC1000-3-2 specifications. The CM6807
includes circuits for the implementation of a leading edge,
input current shaping technique “boost” type PFC and a
trailing edge, PWM.
The CM6807’s PFC and PWM operate at the same
frequency, 67.5kHz. A PFC OVP comparator shuts down
the PFC section in the event of a sudden decrease in load.
The PFC section also includes peak current lim.