The new fixed frequency 700/800V CoolSET uses a high voltage Superjunction MOSFET in combination with an internal current regulator in a cascode configuration.
This combination provides rapid startup, and easy implementation of brown in protection. The integrated 800V MOSFET and optimised blanking time support high AC line inputs up to 350V AC. Switching losses are reduced through an eco-mode which features a reduced switching frequency at mid and light load conditions.
In addition to the standard output short, overload and over voltage protection, the CoolSET can detect abnormal line input conditions.
In-system protection includes V CC and CS pin short-to-ground to prevent controller damage during abnormal startup conditions. Over temperature protection uses hysteresis to improve operational fault handling. All protection modes are implemented with auto-resume to minimise interruptions to system operation.