Tag: Ballast

This is Electronic Ballast for CFL (Compact Fluorescent Lamp) circuit using IR2156. The IR2156 contains a high voltage half-bridge gate driver with a state diagram and programmable oscillator to make a full ballast control IC. The feature of IR2156 are programmable preheat time, programmable preheat and run frequencies, programmable over-current protection and programmable dead-time. Protection from filament failures, failure of […]

This is a electronic ballast circuit using L6569. This circuit uses The L6569 because it can control a low voltage halogen lamp transformer or a symmetric half bridge inverter of a fluorescent lamp ballast directly. The prevention of cross conduction is done by Two 270mA buffers drive the inverter MOSFETs with a 1.25ms built-in dead time. This circuit need only […]

Simplicity, low cost and improved efficiency when compared with the alternative options are the reasons why the switchstart circuit has been widely adopted. Moreover, the 230V mains voltage is sufficiently higher than tube running voltage to let the use of the simple series impedance ballast in almost every case. Where the mains voltage is not high enough, for example in […]