DESCRIPTION
The LT ®1508 is a complete solution for universal off-line switching power supplies utilizing active power factor correction. The PFC section is identical to the LT1248 PFC controller except the EN/SYNC pin is removed because PFC and PWM are synchronized internally.

FEATURES
■ PFC and PWM Single Chip Solution
■ Synchronized Operation up to 300kHz
■ 99% Power Factor Over 20:1 Load Current Range
■ Voltage Mode PWM
■ Instantaneous Overvoltage Protection
■ Dedicated Overvoltage Protection (OVP Pin)
■ Minimal Line Current Dead Zone
■ Typical 250µA Start-Up Supply Current
■ Line Switching Noise Filter
■ Low Quiescent Current: 13mA
■ Fast 1.5A Peak Current Gate Drivers
■ Separate Soft Start Control

APPLICATIONS
■ Universal Power Factor Corrected Power Supplies and Preregulators