Optimization for Power Supplies Thermal Regime

The paper analyses the thermal flow on a power transistors stage inside an operational AC-DC supply source. The study is done to optimize power AC-DC operation, used as a battery charger, digital systems supply and so on. optimization is accomplished by a synergically approach between thermal measurements and thermal modeling. The experimental measurements with the IR precision image thermal camera FLIR SC640 give an appropriate view of the main heat dissipation A thermal solver, using detailed electrical and thermal information offers the designer an optimization of the power stage heat dissipation to achieve maximum system performance. The study aims to enlarge the power range of this type of versatile power AC-DC source by an optimized thermal operation design. Co-simulation also enables the designer to ensure for prototypes a short time analysis for the system. The results are interpreted for good reliability of the device.