Fixed frequency PWM controller delivers circuit protection

5th April 2018

Lanna Deamer

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Datasheet

Today’s power supplies demand components which provide suitable performance, efficiency, robustness, and ease of design. To meet this need, Infineon Technologies has announced the fixed frequency 700/800V CoolSET 5th generation. This solution combines a PWM controller IC with the latest 700 and 800V CoolMOS P7 MOSFETs in a single package. The single platform supports isolated and non-isolated flyback topologies.

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.