Description

The UCC2897A Current Mode Active Clamp PWM Controller offers a highly integrated feature set resulting in precision control required for an active clamp forward or flyback converter. The UCC2897A data sheet contains all the design details necessary for accurately programming the device. However, there are significant design considerations and trade-offs unique to the active clamp power stage that must be defined prior to setting up the control device. Using the active clamp forward topology as an example, the clamp, power stage and control loop compensation is detailed in the following application note, which is intended to complement the information presented in the UCC2897A data sheet. This information is also applicable to the UCC2891/2/3 and 4.