TPS92210 is used in an existing dimmable LED driver design with 70V/300mA. The redesign should be SELV with 35V/630mA. The result shows a power factor >0.9, which is OK. But the dimming (10 steps) is only going down to 5W (19%). The target is 10%-100% dimming. Do you have design suggestions to reach 10% dimming level?