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.
Summary of Features
- Opto-less design (no opto-coupler)
- Optimized for efficiency and EMC
- Suitable for harsh powertrain applications
Potential Applications
- Isolated 12V supply for any MEHV system
- 48V powertrain systems
