International Rectifier (IR), a world leader in power management technology has introduced IRS2168D fully-integrated and protected high-voltage integrated circuit (HVIC) for advanced electronic linear fluorescent lamp ballasts, which incorporate active power factor correction (PFC).
The new IC integrates PFC, ballast control and 600V half-bridge driver in a compact 16-lead SO package and features a wide range input voltage PFC to simplify complex multi-lamp circuits offering a fault counter on the current-sense pin for multi-lamp ballasts and cycle-by-cycle protection on the PFC side for high reliability.
According to IR, in addition to integrating many features for maximum programmability and protection, the IRS2168D provides a wide range input to address the challenge of designing complex multi-lamp electronic ballast circuits, rounding out its portfolio of non-dimmable fluorescent ICs.
The IRS2168D s PFC circuitry provides a high power factor (PF) of 0.995, low total harmonic distortion (THD) of less than 10 per cent and DC bus regulation within a tolerance of +/- 2.5 per cent.
The IC has many programmable features including those for pre-heat time, pre-heat frequency, run frequency, and ignition ramp. Protection features are provided for half-bridge over-current, PFC over-current, lamp failure-to strike, and filament failures in addition to other protection features such as closed-loop ignition current regulation, DC bus under-voltage reset and an automatic restart function.
The IC also features an integrated bootstrap diode, fixed internal 1.6-microsecond half-bridge deadtime, voltage-controlled oscillator (VCO), end-of-life window comparator pin, lamp removal/auto-restart shutdown pin and an internal 15.6V Zener diode clamp on Vcc. IR s new ballast control IC, available from Avnet utilises IR s advanced high-voltage IC process, which incorporates next-generation high-voltage level-shifting and termination technology to deliver superior electrical over-stress protection and higher field reliability.