This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

[FAQ] What is the push-pull topology and how is it different from other isolated power architectures?

What is the push-pull topology and how is it different from other isolated power architectures?

  • Push-pull topology uses two low-side switches that are ON in alternate phases of a clock to transfer power continuously across a center-tapped isolation transformer (see figure). It uses feed-forward regulation with the output voltage controlled purely through transformer ratios. The continuous power transfer results in much lower peak currents compared to other topologies resulting in lower emissions and higher efficiency. The symmetric drive also prevents transformer saturation resulting in compact transformers.