As a supplement to DN86, this design note aims at depicting the essential EMC tests for a standalone
MR16 lamp with up to three power LEDs in series at 350mA. The LED driver is simply
implemented by a switching buck regulator employing the ZXLD1350 hysteretic current controller
with the ZXSBMR16PT8 dedicated and new full bridge/freewheeling combo extremely low
leakage schottky diodes. Throughout the compliant verification, the driver was operated from a
12Vac source by means of a typical linear step down transformer directly connected to AC mains.
For the demonstration purpose, the application circuit diagram along with the part list is
presented as a ready-to-use reference design tool.