Catalog
LOW STANDBY POWER PFC CONTROLLER
Key Features
• PSR Implementation Based on Flyback and Buck Topology
• Universal AC Voltage Input for Constant Voltage (CV) Regulation
• Valley Detection for Primary MOSFET Switch to Achieve Low Switching Loss and High Efficiency
• High PF (>0.9) and Low THD (<20%) for Wide Loading Range (50% to Full Loading)
• Internal Protections:
• Under-Voltage Lockout (UVLO)
• Over-Voltage Protection (OVP)
• Over-Current Protection (OCP)
• Output Short Protection (OSP)
• Over-Temperature Protection (OTP): Thermal Shutdown and Auto Thermal Recovery
• Low Standby Power
• Low System BOM Cost
• Controller with External MOSFET
Description
AI
AL1788 is a high performance AC/DC Power Factor Correction (PFC) controller targeting at LED lighting applications. Based on Primary Side Regulation (PSR) implementation, AL1788 does not require opto-coupler and any secondary feedback circuit to save overall BOM cost. It operates at Quasi-Resonant (QR) mode where MOSFET is turned on at the valley of the drain voltage, which minimizes switching loss to result in high efficiency.