PROJECT TITLE :

Microcontroller Resource Optimization in Non-Resonant Ballast Applications

ABSTRACT:

This paper presents a approach to optimize the program of a sliding mode management implemented during a microcontroller, that incorporates an analog comparator as an enclosed peripheral. The main idea is "to save lots of” microcontroller processing capability by avoiding the use of the analog to digital converter. This saved capability will be used for other tasks that rely in the applying. In our case, the saved processing capability was used to get the mandatory signals to regulate an integrated ballast. The ballast selected as an example is a non-resonant ballast that integrates during a single stage a full-bridge inverter and a Buck converter. This ballast is accountable for feeding an HID lamp with alternating current, and it is also responsible for stabilizing its current. Thus, the management signals necessary to attain each tasks are additional sophisticated than those signals that are used to regulate an standard full-bridge inverter. The proposed algorithm for the sliding mode management may be a good various for applications where power converters are used. Experimental results are shown.