Rohm expands range of compact PMDE diodes for automotive applications
Diodes such as those in Rohm’s RBxx8, RFN or VS series are used for rectification, protection and circuits in a wide range of applications, for example in the automotive, industrial and consumer electronics sectors. In addition, there is an increasing need to reduce the package size to minimise the mounting area.
The compact PMDE package developed by Rohm features a PCB trace structure similar to that of the conventional SOD-323 type. By redesigning the backside electrode and heat dissipation path, Rohm was able to achieve the same electrical characteristics (i.e. current, dielectric strength) as the standard SOD-123FL package (3.5 mm × 1.6 mm) in a smaller package format. This contributes to the miniaturisation of the board, as the mounting area has been reduced by about 42 percent. In addition, the mechanical strength is about 1.4 times higher than the SOD-123FL, reducing the risk of solder cracking when the PCB is stressed and enabling higher assembly reliability.
The PMDE package portfolio consists of eight models of the RBxx8 series of Schottky Barrier Diodes (SBDs), two models of the RFN series of Fast Recovery Diodes (FRDs) and two models of the VS series of Transient Voltage Suppressors (TVSs). A wide range of switching applications can be realised with the compact diodes.
The PMDE package offers the same electrical characteristics as the conventional SOD-123FL package in a smaller format, allowing for better heat dissipation and mounting reliability. In addition, all automotive-compatible part numbers are qualified to the AEC-Q101 standard for automotive reliability.
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