Design of a half-bridge bootstrap circuit for grid inverter application controled by PIC24FJ128GA010

This paper explains a design of a bootstrap circuit to drive a half-bridge inverter circuit, The standard bootstrap circuit consists of a driver IC and three external components (RBoot, DBoot and CBoot) for inverter application. However, the bootstrap circuits had shown some weakness such as having adequate components to allow a high performance. This article shows how to select the bootstrap driver circuit parameters and using IR2112 to drive a power IGBTs inverter with a low energy consumption. In this paper, the PWM signal is generated by using a PIC24FJ128GA010 microcontroller and interfaced to the bootstrap circuit. The paper discusses the advantage and disadvantages of the bootstrap.