Miniature Dimmable 26W Ballast

The IRPLDIM4E Reference Design is a miniature dimmable electronic ballast for driving
26W compact fluorescent lamps from a 220VAC line. The circuit provides all of the
necessary functions for preheat, ignition, and dimming control of the lamp and also
includes the EMI filter and AC rectification stage. The ballast size is 1.42in x 2.44in
(36mm x 62mm).
The circuit is designed around the IRS2530D(S)PbF DIM8TM Ballast Control IC. The
IRS2530D includes adjustable preheat time, frequency sweeping for filament preheating
and lamp ignition, a dimming reference and feedback input, a high soft-start frequency to
avoid lamp flash, lamp and ballast fault protection for open filament condition, failure to
strike, and no lamp fault conditions, automatic restart during lamp exchange, and, low
AC line protection. The IRS2530D is simple to use, has only 8 pins, and drastically
reduces component count for a complete dimming solution.