LT1249CN8 Datasheet PDF - Linear Technology

●DESCRIPTION

●The 8-pin LT® 1249 provides active power factor correction for universal offline power systems with very few

●external parts. By using fixed high frequency PWM current averaging without the need for slope ompensation, the LT1249 achieves far lower line current distortion, with a smaller magnetic element than systems that use either peak current detection or zero current switching approach, in both continuous and discontinuous modes of operation.

●FEATURES

●■ Standard 8-Pin Packages

●■ High Power Factor Over Wide Load Range with Line Current Averaging

●■ International Operation Without Switches

●■ Instantaneous Overvoltage Protection

●■ Minimal Line Current Dead Zone

●■ Typical 250µA Start-Up Supply Current

●■ Rejects Line Switching Noise

●■ Synchronization Capability

●■ Low Quiescent Current: 9mA

●■ Fast 1.5A Peak Current Gate Driver

●APPLICATIONS

●■ Universal Power Factor Corrected Power Supplies

●■ Preregulators up to 1500W