ANALOG DEVICES DC2465A

DC2465A demonstration circuit is a 3-phase ideal diode bridge using three LT®4320 controllers and six N-channel FETs. This demo board provides highly efficient 3-phase rectification with an input voltage range from 5VAC to 28VAC RMS (line to neutral) and maximum load current of 25A. High-efficiency 3-phase rectification is achieved by using six low RDS(ON) (3.3mohm typical) N-channel FETs instead of the six diodes used in a conventional 3-phase diode bridge. This solution reduces heat dramatically and eases thermal design requirements. Furthermore, power lost to the diodes is available to the application. The 3-phase ideal diode bridge eliminates a costly heat sink and active cooling solutions required with a conventional 3-phase diode bridge. Overall solution cost and size can be dramatically reduced.