DLPS052 October 2015 DLPA3000
The DMD HV regulator generates three high voltage supplies: DMD_VRESET, DMD_VBIAS and DMD_VOFFSET (see Figure 17). The DMD HV regulator uses a switching regulator (switch A-D), where the inductor is time shared between all three supplies. The inductor is charged up to a certain current value (current limit) and then discharged into one of the three supplies. If not all supplies need charging, the time available will be equally shared between those that do need charging. The recommended value for the capacitors is 1 µF for VRST and VOFS, and 470 nF for VBIAS. The inductor value is 10 µH.