Design Of Isolated Gate Driver For Low Power Energy Harvesting

Abstract

Isolated gate drivers are widely adopted for half-bridge, full-bridge and dual boost AC-DC converters for power conversion in low power electromagnetic energy harvesting, in which efficiency is of great importance. However, commercial isolated gate drivers were all designed for higher voltage and higher power applications, which brought severe power consumptions at low power scenario. Aim at low power loss and simple driver architecture, this paper proposes two low power isolated driver circuits based on the transformer and the bootstrap capacitor respectively. The detailed design and loss analysis are carried out. The paper elaborates the design method and scope of application. The prototypes of the two isolated gate drivers are also built to verify the effectiveness on the experimental platform.