A Digital Controlled Desaturation Detection with Adjustable Blanking Time for IGBT Driver

In this paper, a desaturation detection structure with a digital controlled adjustable blanking time for IGBT driver is proposed. It consists of a desaturation Filter a Leading Edge Blanking module (LEB) and a LOGIC control module. The LEB time and Fault time can be adjusted by users through an SPI in LOGIC module in order to be suitable for different kinds of IGBTs. The circuit is designed based on the SMIC 180 nm BCD Process.