Saturday, March 19, 2011

Low Forward Drop Rectifier schematic

A TMOS power FET , Q1 , and LM393 comparator provide a high efficiency rectifier circuit. When Va exceeds Vb1 U1's output becomes high and Q1 conducts. Conversely, when Vb exceeds Va1, the comparator output becomes low and Q1 does not conduct.
Low forward dopr schematic
The Forward drop is determined by Q1's on resistance and current I. The MTH40N05 has an ON resistance of 0.028 Ω ; for I = 10 A , the forward drop is less than 0.3V .Typically , the best Schottky diodes do not even begin conducting below a few hundred mV.

Electronic Circuit is a good site for hobbyist also who would like to try DIY because it shared good circuits. If you have a personalized circuit requirement you may feel free to request it through the comment box or contact me.