CM6806
CM6806 is 10-PIN Green-Mode PFC/PWM Combo CONTROLLER manufactured by Champion.
CM6805(A;B)/CM6806A
10-PIN Green-Mode PFC/PWM bo CONTROLLER for High Density AC Adapter
GENERAL DESCRIPTION
Features
The CM6805A and CM6806A are the Green-Mode
PFC/PWM bo controller for High Density AC Adapter. For the power supply, its input current shaping PFC performance could be very close to the performance of the CM6800 or ML4800 leading edge modulation average current topology.
CM6805A/CM6806A 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 pliant to IEC1000-3-2 specifications. The CM6805A / CM6806A includes circuits for the implementation of a leading edge, input current shaping technique “boost” type
PFC and a trailing edge, PWM.
The CM6805A’s PFC and PWM operate at the same frequency, 67.5k Hz. A PFC OVP parator shuts down the PFC section in the event of a sudden decrease in load. The PFC section also includes peak current limiting for enhanced system reliability.
Both PFC and PWM have the Green Mode Functions. When the load is below GMth, Green Mode Threshold,
PFCOUT is turned off. The GMth can be programmed by the designer. PWM Green Mode will happen when the
PWMCMP (PWM parator) Duty Cycle is less than ~ 6%, in the next cycle, the PWMOUT pulse will be removed until PWMCMP Duty Cycle is greater than 6%, then the next cycle, PWMOUT pulse appears.
PWM has a PWMtrifault pin which can sense the PWM short and determine the GMth to turn off PFC.
Both PFC and PWM have the Green Mode to meet blue angel and energy star spec. 10-Pin SOIC package PWM pulse skipping for the green mode Use RAC as the Startup resistor around 5 Mega Ohm at IAC pin It can use the HV bipolar to start up the chip and it helps green mode. Easy to configure into Boost Follower Enable lowest BOM for power supply with PFC Internally synchronized PFC and PWM in one IC Patented slew rate enhanced voltage...
