Super Low Loss Diode (SLLD) for Automotive Alternator Generators

To assist the reduction of CO2 emissions of vehicles with internal combustion engines (ICE), Super Low Loss Diode (SLLD) was developed. SLLD comprises a synchronous rectifying circuit instead of conventional Si Zener diode and may reduce working resistance by over 80 % when compared to conventional Zener diode rectifier. SLLD can contribute to a saving of 1.2 g CO2 /km per alternator, in other words, almost 1.0 % efficiency improvement towards the total efficiency targets of ICE Automotive sector emissions goals [1]. SLLD may rectify autonomously due to the integrated topology architecture comprising both power supplies and control IC. Using a high density assembly method and optimized circuit conditioning, the SLLD device external form factor is preserved, providing conventional Zener diode compatibility with higher electrical efficiency. SLLD can be adopted as a drop in replacement device to conventional Zener diodes in alternator manufacturing lines providing high efficiency performance as well as convenience.