The circuit proposed for the HV98101 is for driving LED loads to a power of 5-15 W. There are no suggested circuits for higher power LED loads. The device is designed to drive other components which are capable of providing an LED Drive output in the range 5-15 W. Its output is tailored to work with components capable of delivering 5-15 W.
In order to increase power output, you would most likely need a MOSFET that is capable of handling more power. The MOSFET should have a greater gate capacitance than a device capable of 5-15 W. Such a gate capacitance would require greater drive output than that HV98101 can deliver.
The HV98101 could be used as the basis for developing a 100 W driver unit for a 100 W LED load, however, it would require serious attention to the specification and selection of other components.