IR2159S

www.DataSheet4U.com Preliminary Data Sheet No. PD60169-D IR2159(S) IR21591(S) Features DIMMING BALLAST CONTROL IC Brown-out protection Automatic restart Micro-power startup Zener clamped Vcc Over-temperature protection 16-pin DIP and SOIC package types 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 Parameter Deadtime Frequency Range IR2159 1.8us See Graph 3 IR21591 1.0us See Graph 4 Description 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. Externally programmable features such as preheat time and current, ignition-to-dim time, and a complete dimming interface with minimum and maximum settings provide a high degree of flexibility for the ballast design engineer. Protection from failure of a lamp to strike, filament failures, thermal overload, or lamp failure during normal operation, as well as an automatic restart function, have been included in the de...