IRS2538DSPBF

IRS2538DSPBF Magnetic Replacement Ballast IC Features  Ballast control plus half-bridge driver in one IC  Single-stage topology (no PFC stage required)  High PF and low THD  Preheat, ignition and running lamp modes  Closed-loop lamp current control  Half-bridge NZVS protection  Adaptive dead-time  Lamp insert auto-restart  Internal bootstrap MOSFET  Micro-power start-up current  15.6V internal zener clamp on VCC  Excellent ESD and latch immunity  RoHS compliant  8-pin SO8 package Applications  Magnetic replacement electronic ballast  Low cost electronic ballast Description This IC takes full advantage of IR’s patented ballast and high-voltage technologies to realize a simple, highperformance 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 halfbridge 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. Package Options Application Diagram F1 L L1 220VAC LINE INPUT C1 N BR1 CBUS RVCC1 RVCC2 RLIM1 CVCC1 RLIM2...