Isolated Power Supplies for PLC I/O Modules
The training starts with an overview of an analog input module. Typical components and their voltage supply levels are shown. Next, possible power topologies like push-pull, flyback or fly-buck with their advantages and disadvantages are discussed.
The main part of the training is about the Fly-Buck topology. First, the working principle is explained. Then tips about the right selection of the duty cycle are given. Furthermore, effects of leakage inductance of a transformer are presented.
The training finishes with an overview about available TI Designs and power designs that use the Fly-Buck topology.