Other Parts Discussed in Thread: LMR36006
Hi team,
Could you tell me how LMR36006-Q1 stops inductor current while Hiccup mode?
Figure 12 shows short circuit condition and LMR36006-Q1 is in hiccup mode. After 94ms hiccup mode starts, inductor current flows again and it is over its current limit. LMR36006-Q1 starts to turn on high side MOSFET to flow supply inductor current.
In this condition, does high side MOSFET turn on over 20ms? Or does low side MOSFET turns on after high side switch turns on and it leads to hits high side over current? I guess low side valley current limit operates and skip turning on high side MOSFET, is it correct?
If yes, how do you stop inductor current through low side MOSFET? If hiccup is continue to operate, LMR36006-Q1 should stop inductor current. However, this current is able to flow through body diode of low side MOSFET. Is there additional B2B shutdown MOSFET on low side?
Regards,
Ochi