When we pick up the datasheets of UC1843B-SP and UCC38C44, we notice that they have the same functional block diagram, specially the PWM generator circuit (Error amplifier, current sensing PIN and the comparotor), the error amplifier of both devices goes through a divider by 3. But when we come the "slope compensation design", we notice that there is a diffence in the design process between the two devices.
*In UC1843B-SP, in page 18/27 of the datasheet, a gain "Gcs=3" is incorporated in the slope compensation design (See equations 46 to 51).
*In UCC38C44, in page 30/50 of the datasheet, we do not see any gain in the design of slope compensation(See equations 31 to 38).
Why there is a difference in the design of current sensing and slope compensation between these devices eventhough they have the same functional block diagrame?
What is the effect of the divider on the output of "Error Amplifier" to the current sensing and slope compensation PIN ?