AL6562A Power Factor Correction (PFC) Controller with Enable/Disable Control

Diodes' AL6562A is a current-mode PFC controller designed for operating in transition mode. With a superior linear performance multiplier, it ensures the device operates over a wide input voltage range with superior low total harmonics distortion (THD). The output voltage is controlled by means of an error amplifier and a precise (1.5% at T_J = +25°C) internal voltage reference. The AL6562A meets stringent energy-saving standards with low start-up current and operates with low current consumption when entering into standby mode. Adjustable OVP circuitry increases system robustness allowing the device to withstand transient caused at startup and during load disconnects. The AL6562A is available in an SO8 package.

Features

• Industry-standard pin configuration
  • Can replace most of existing transition mode PFC solutions with limited change
• Low start-up, operating, and quiescent currents
  • Can meet stringent energy-saving standards
• Enable/disable function on INV input
  • Offers design flexibility for power-on sequence and standby power loss optimization
• Boundary conduction mode (BCM) operation
  • Achieves higher conversion efficiency and reduced EMI issues with fewer components
• Adjustable output overvoltage protection (OVP)
  • Increases system robustness

Applications

• LED drivers
• PFC pre-regulators for
  • SMPS
  • Adapters
  • Chargers
• LED and fluorescent tube ballasts

 
 Click image for larger view of schematic