PT5612 Adaptive Control IC For Fluorescent Lamp Ballast DESCRIPTION The PT5612 is a compact electronic ballast control IC mainly for the fluorescent lamp. The PT5612 incorporates an active electronic ballast controller and a 650V half-bridge high side driver. Two advanced active-features, active dead-time control and active frequency ZVS, are included in PT5612. And PT5612 also includes crest factor over-current and over-heat protection. In order to prevent the lamp flash in the initial start-up, a soft-start circuitry is integrated into PT5612. The programmable voltage controlled oscillator can permit the ballast engineer design their products conveniently. The 8-pin IC, PT5612, makes the ballast system much simpler and saves lots of external components. PT5612 is available in SOP8 and DIP8 package. FEATURES • • • • • • • • • Integrated 650V half-bridge high side driver Active dead-time control Active frequency ZVS Crest factor over-current protection Programmable pre-heat time Programmable run frequency Over-heat protection Soft-start functionality Supporting SOP 8 and Dip 8 package APPLICATION • Fluorescent lamp electronic ballast BLOCK DIAGRAM Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT5612 TYPICAL APPLICATION CIRCUIT V1.0 2 December 2010 PT5612 ORDER INFORMATION Valid Part Number PT5612-S1 PT5612-S2 PT5612 Package Type 8 Pins, SOP, 150mil 8 Pins, SOP, 150mil 8 Pins, DIP, 300mil Top Code PT5612-S1 PT5612-S2 PT5612 PIN CONFIGURATION V1.0 3 December 2010