Designing Cost-Effective, Low Power Galvanic Isolation for Power Supplies

Designing Cost-Effective, Low Power Galvanic Isolation for Power Supplies

Sponsored by Bourns

Galvanic isolation can be very useful RS-485 or RS-232-based board designs to deliver the required voltage level to both sides of the connecting cable without introducing switching noise, common mode voltages, or for sensors that can be sensitive to ground loops.  A Bourns application note presents isolated buck converter calculations to help meet data interface needs, and also provides a design methodology for a coupled inductor with high creepage and clearance for a 2 W power supply.