Existing on-chip systems for power conversion optimize either performance or dynamic conversion. No solution offers simultaneous high efficiency and adjustable conversion ratios. Additionally, current devices are bulky and lack sufficient power density.
The on-chip inductorless power converter utilizes film bulk acoustic resonator (FBAR) technology to increase power density while minimizing electromagnetic interference (EMI). The FBAR device consists of a piezoelectric material sandwiched between two electrodes and acoustically isolated from the surrounding medium. Replacing the inductor with a FBAR reduces the size of power converters. The device offers high inductance density with a high Q factor and can be fabricated easily in a CMOS compatible process. This FBAR technology promises economical production of LEDs with dynamic conversion and lower electromagnetic interference.