Description
The IR2159/IR21591 are complete dimming ballast controllers and 600V half-bridge drivers all in one IC. The architecture includes phase control for transformer-less lamp power sensing and regulation which minimizes changes needed to adapt non-dimming ballasts for dimming.

FEATUREs
•Ballast control and half-bridge driver in one IC
•Transformer-less lamp power sensing
•Closed-loop lamp power control
•Closed-loop preheat current control
•Programmable preheat time
•Programmable preheat current
•Programmable ignition-to-dim time
•0.5 to 5VDC dimming control input
•Min and max lamp power adjustments
•Programmable minimum frequency
•Internal current sense blanking
•Full lamp fault protection
•Brown-out protection
•Automatic restart
•Micro-power startup
•Zener clamped Vcc
•Over-temperature protection
•16-pin DIP and SOIC package types