Galvanic Isolation
Galvanic isolation allows power or signal transfer between two electrical circuits without a shared current flow (circuits separately grounded). This can increase the reliability and safety of power systems and protects sensitive circuits from transients.
Inductive / Coreless transformer
- The magnetic field coupling between inductors carries the signal across the isolation boundary.
Capacitive Isolation
- The electric field between parallel plates (capacitor) carries the signal across the isolation boundary.
Optocoupler
- Photons from an LED are detected by a photdiode to transmit the signal across the isolate boundary.
Characteristics:
- IC is complex; all Intergrated
- Full protection features
- Higher cost/Highest safety
- Ease of Layout, no extra components
- APPS-High Power AC/BLDC Motors; Industrial SMPS; Solar Inverters; High Power UPS>3KW