ANALOG DEVICES DC1823B

DC1823B demonstration circuit features the ideal diode bridge controller LT®4320 suitable for applications that require high current AC to DC full-wave rectification or DC polarity correction. The LT4320 drives four N-channel MOSFETs to perform full-wave rectification functionally similar to a diode bridge but with much lower power dissipation. This topology eases thermal design, and increases usable output voltage. In addition, an all N-channel topology has benefits over a P-channel topology such as a wider selection of MOSFETs, lower cost, lower RDS(ON), and smaller footprint. Only a few essential components are required to operate the LT4320 as an ideal diode bridge: four N-channel MOSFETs, a bypass ceramic capacitor, and an AC smoothing capacitor (CLOAD). The DC1823B includes four very low RDS(ON) N-channel MOSFETs (2.5mohm typical) to support high current applications.