DESCRIPTION
The LX1562 is a second-generation family of power factor correction controllers using a discontinuous mode of operation. They are optimized for electronic ballast applications. Many improvements have been made over the original SG3561A controller introduced by Silicon General Semiconductor in 1992.

KEY FEATURES
■ INTERNAL START-UP CIRCUIT
■ INTERNAL CURRENT SENSE BLANKING
■ IMPROVED MICROPOWER START-UP
   CURRENT (300µA max.)
■ CLAMPED E.A. OUTPUT FOR LOWER
   TURN-ON OVERSHOOT
■ MULTIPLIER CLAMP LIMITS MAXIMUM
   INPUT CURRENT
■ INTERNAL OVERVOLTAGE PROTECTION
   REPLACES BUILT-IN C.S. OFFSET
■ PWM OUTPUT CLAMP LIMITS MOSFET
   GATE DRIVE VOLTAGE
■ INCREASED UVLO HYSTERESIS REDUCES
   START-UP TIMING (LX1562 only)
■ LOW OPERATING CURRENT CONSUMPTION
■ INTERNAL 1.5% REFERENCE
■ TOTEM POLE OUTPUT STAGE
■ AUTOMATIC CURRENT LIMITING OF BOOST
   STAGE
■ DISCONTINUOUS MODE OF OPERATION
   WITH NO CURRENT GAPS
■ NO SLOPE COMPENSATION REQUIRED

APPLICATIONS
■ ELECTRONIC BALLAST
■ SWITCHING POWER SUPPLIES