![]() ![]() Contrast this with a toroidal transformer, laminated core transformer, or other common transformers, where copper wire is used to form the windings around the transformer core. What is a Planar Transformer?Ī planar transformer uses flat windings that can be placed directly on a PCB. Here’s how you can create a planar transformer PCB layout. ![]() Both options give you a low-profile transformer that could handle a range of current values. A planar transformer is one option that can be through-hole mounted to the board, or it can be integrated directly into your PCB. Through-hole mountable transformers can sit very tall on the PCB, so it helps to have an alternative that has a low profile. Even small transformers take up more space than the majority of integrated circuits, and power system designers need to carefully consider the size of these components when creating a PCB layout. The only comparably large components I can think at the moment of our large high voltage capacitors, wire-wound inductors, some connectors, and heatsinks. ![]() ![]() By far, the bulkiest through-hole component you can place on your PCB is a transformer. ![]()
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