ML4833CP Datasheet PDF - Micro Linear Corporation

GENERAL DESCRIPTION
The ML4833 is a complete solution for a dimmable or a non-dimmable, high power factor, high efficiency electronic ballast. The BiCMOS ML4833 contains controllers for “boost” type power factor correction as well as for a dimming ballast. The ML4833 was designed to minimize the number of external components required to build an electronic ballast.

FEATURES
■ Complete power factor correction and dimming ballast control in one IC
■ Low distortion, high efficiency continuous boost, peak current sensing PFC section
■ Programmable start scenario for rapid or instant start lamps
■ Lamp current feedback for dimming control
■ Variable frequency dimming and starting
■ Programmable restart for lamp out condition to reduce ballast heating
■ Internal over-temperature shutdown replaces external heat sensor
■ PFC overvoltage comparator eliminates output “runaway” due to load removal
■ Low start-up current <0.5mA
■ Power reduction pin for end of life and GFI detectors