International Rectifier's offers IRS2538DSPBF-ND
International Rectifier's IC takes full advantage of its patented ballast and high-voltage technologies to realize a simple, high-performance magnetic ballast replacement solution. The IC includes a novel single-stage circuit topology and control method to achieve high power factor and low THD without a PFC stage or any electrolytic capacitors. A single high-voltage pin senses the half-bridge voltage to perform necessary protection functions. Closed-loop control of the lamp current provides constant lamp brightness over a wide-line input voltage range. Combining these high-voltage control algorithms in a single 8-pin IC results in a large reduction in component count, an increase in manufacturability and reliability, a reduced design-cycle time, while maintaining high-ballast system performance.
The IRS2538DS also features preheat, ignition and running lamp modes, closed-loop lamp current control, fixed pre-heat time (2 s typical), adaptive deadtime (0.5 μs to 1.5 μs typical), lamp insert auto-restart, micro-power start-up (125 μA), and an internal 15.6 V Zener diode clamp on VCC.