Gate Drive and Signal Path Components
Technical Dialogue Session
Devices and Components II
emitter sensing gate driver, optocoupler, switched mode power supply, isolated flyback converter, temperature sensor, sigma delta converter
This paper presents a highly integrated galvanic isolated emitter-sensing gate driver. It uses optical coupling technology for safe isolation and strong noise immunity between the microcontroller circuitry and the high voltage switching power devices. The gate driver features a cycle-by-cycle fail-safe protection mechanism to ensure power device's safe operations. It adopts an adaptive blanking time method for quick protection response, and an adaptive shut-down method for efficient over current or short circuit protection. It also has a built-in switched mode power supply controller. For optimal and reliable operation of power inverter system, the gate driver has an integrated temperature sensor to monitor the power device's temperature.