48V FLYBACK DEMOBOARD

This demokit is a solution example for an isolated power topology for 48V mild hybrid applications. The reference design board operates at 400 kHz switching frequency in the [0-1]A load range at 12V nominal output, the functional input voltage range is [6-35]V. The secondary side output voltage control is implemented via an auxialiary winding that avoids the using of galvanic isolated devices (e.g. optocouplers) to feed the sensed voltage. The AECQ-100 OPTIREG™ Switcher TLE8386-2EL is used as a flyback controller in combination with the primary switch IPD50N08S4-13 OptiMOS™-T2. The extended power supply range of the controller make it suitable for harsh automotive applications, its current mode control loop make it suitable for a wide bill of material variation thanks to a dedicated compensation pin. Finally the controller embeds some protection features such as output overvoltage protection, over current protection and over temperature shutdown that improve the reliability of the system.