AL1788

Description

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. 

Feature(s)

• 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

Application(s)

• General LED Lighting
• Smart Connected LED Light Bulbs
• Smart Connected LED Tubes, Panel Lights, Troffers, and Ceiling Lights
• High PFC and low THD power supply