Abstract
This paper discusses the use of PCB integrated inductors for low power DC/DC buck converters. Coreless, magnetic plates and closed core structures are compared in terms of achievable inductance, power handling and efficiency in a footprint of 10 × 10 mm2. Analytic and FEM methods are applied and typical current waveforms encountered in a buck converter are included. The magnetic layers consist of electroplated NiFe, so that the process is fully compatible with standard PCB process. A 4.7 μH PCB integrated inductor with DC current handling of up to 500 mA is presented. This inductor is employed in a 1.5 W buck converter using a commercial available IC. The footprint of the entire converter measures 10 × 10 mm2 and is built on top of the integrated inductor to demonstrate the concept of integrated passives in power electronic circuits to achieve ultra flat and compact converter design.
| Original language | English |
|---|---|
| Pages (from-to) | 319-325 |
| Number of pages | 7 |
| Journal | Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC |
| Volume | 1 |
| Publication status | Published - 2002 |
| Externally published | Yes |