GENERAL DESCRIPTION

The CM6807 is the Green-Mode PFC/PWM Combo controller for High Density AC Adapter. For the power supply less than 200Watt, it’sinput current shaping PFC performance could be very close to the performance of the CM6800 or ML4800 leading edge modulation average current topology.

FEATURES

Patent Filed #5,565,761,#5,747,977, #5,742,151, #5,804,950, #5,798,635

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 which can be > 2000K or higher 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 error amplifier with advanced input current shaping technique

Universal Line Input Voltage

CCM boost or DCM boost with leading edge modulation PFC using Input Current Shaping Technique

Feedforward IAC pin to do the automatic slope compensation

PFCOVP, VCCOVP, Precision -1V PFC ILIMIT, PFC Tri-Fault Detect comparator to meet UL1950

Low supply currents; start-up: 100uA typical, operating current: 2mA typical.

Synchronized leading PFC and trailing edge modulation PWM to reduce ripple current in the storage capacitor

between the PFC and PWM sections and to reduce switching noise in the system

VINOK Comparator to guarantee to enable PWM when PFC reach steady state

High efficiency trailing-edge current mode PWM

Exact 50 PWM maximum duty cycle

UVLO, REFOK, and brownout protection

Digital PFC and PWM soft start, ~10mS

Precision PWM 1.5V current limit for current mode operation

PWMtrifault to sense DC to DC short and Turn off PFC at GMth

PWMtrifault also can be programmed to do the Thermal Protection

APPLICATIONS

‹AC Adaptor

‹Open Frame