This paper presents the design of a 1: 50 bondwire micro-transformer assembled with IC gold bonding wires and a toroidal LTCC magnetic core with race-track shape. The transformer is fabricated on-top of a standard BCD IC in a 15 mm2 footprint area for micro-power energy harvesting applications. Measurements show a secondary self-inductance up to 29 μH with a maximum Q-factor of 11.6 at 1.3 MHz, and a coupling coefficient of 0.65 with an effective turns ratio of 19. This miniaturized technology finds also applications in power supply in package (PwrSiP) and power supply on chip (PwrSoC).
Macrelli, E., Romani, A., Ningning, W., Saibal, R., Michael, H., Paganelli, R.P., et al. (2014). Design and Fabrication of a 29 μH Bondwire Micro-Transformer with LTCC Magnetic Core on Silicon for Energy Harvesting Applications. PROCEDIA ENGINEERING, 87, 1557-1560 [10.1016/j.proeng.2014.11.597].
Design and Fabrication of a 29 μH Bondwire Micro-Transformer with LTCC Magnetic Core on Silicon for Energy Harvesting Applications
MACRELLI, ENRICO;ROMANI, ALDO;PAGANELLI, RUDI PAOLO;TARTAGNI, MARCO
2014
Abstract
This paper presents the design of a 1: 50 bondwire micro-transformer assembled with IC gold bonding wires and a toroidal LTCC magnetic core with race-track shape. The transformer is fabricated on-top of a standard BCD IC in a 15 mm2 footprint area for micro-power energy harvesting applications. Measurements show a secondary self-inductance up to 29 μH with a maximum Q-factor of 11.6 at 1.3 MHz, and a coupling coefficient of 0.65 with an effective turns ratio of 19. This miniaturized technology finds also applications in power supply in package (PwrSiP) and power supply on chip (PwrSoC).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
