The trend toward higher power density has been present in the industry for decades and is projected to continue. Figure 1 shows the reduction in converter size over time for 6-A to 10-A power modules. Technological advancements can result in substantial leaps in size reduction or power output capabilities. Each solid line represents a new generation of technology and demonstrates the associated gains in power density.

Advances in power density often go hand in hand with developments in other areas like efficiency or cost. Generally speaking, fundamental improvements in power-conversion efficiency enable solution size reductions. Such reductions then have a ripple effect, achieving cost savings through less physical material, fewer components, better cost structures, more solution integration and a lower total cost of ownership.