CS1600_1007 Datasheet, PDF (13/18 Pages) Cirrus Logic – LOW-cost PFC Controller for Electronic Ballasts

CS1600
The voltage rating on the capacitor needs to account for the
operation of the device before it hits the overvoltage protection
threshold. This is typically 105% of nominal value, which is
483 V. With the ripple voltage factored in, 22 μF of
capacitance rated at 500 V would suffice for this application.
DS904A7
13