ML4831 Datasheet - Micro Linear Corporation

GENERAL DESCRIPTION
The ML4831 is a complete solution for a dimmable, high power factor, high efficiency electronic ballast. Contained in the ML4831 are controllers for “boost” type power factor correction as well as for a dimming ballast.

FEATURES
■ Complete Power Factor Correction and Dimming Ballast Control on one IC
■ Low Distortion, High Efficiency Continuous Boost, Average 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
■ Over-Temperature Shutdown replaces external heat sensor for safety
■ PFC Over-Voltage comparator eliminates output “runaway” due to load removal
■ Large oscillator amplitude and gain modulator improves noise immunity