DESCRIPTION
The MP4021A is a primary-side–control offline LED lighting controller that achieves high power factor and accurate LED current for isolated single-power-stage lighting applications in a single SOIC8 package. The proprietary real current control method accurately controls LED current from primary-side information. Eliminating the secondary-side feedback components and the optocoupler significantly simplifies the LED lighting system design.

FEATURES
• Real current control without secondary feedback circuit
• Typical ±1.5% load regulation
• Unique architecture for superior line regulation
• High power factor≥0.9 over universal input voltage
• Boundary conduction mode improves efficiency
• Ultra-low (20µA) start-up current
• Low (1mA) quiescent current
• Input UVLO
• Cycle-by-cycle current limit
• Over-voltage protection
• Short-circuit protection
• Over-temperature protection
• Available in an SOIC8 package

APPLICATIONS
• Solid-state lighting
• Industrial and commercial lighting
• Residential lighting