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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. 


  • 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


  • 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

Product Specifications

Product Parameters

Minimum Input AC Voltage (VAC) 85
Maximum Input AC Voltage (VAC) 305
Maximum DC VDD (VDC) 25
LED Current (mA) N/A
Frequency (kHz) 120
Accuracy 4 %
Efficiency 87 %
Dimming N/A
Supply Current N/A mA
Temperature Range -40 to 105 °C

Technical Documents


Evaluation Boards and User Guides

Recommended Soldering Techniques


Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AL1788W6-7 Mouser Electronics Inc. 5900 8/3/2020 Buy Now United States
AL1788W6-7 Digi-Key Electronics 8352 8/2/2020 Buy Now United States
AL1788W6-7 Future Electronics - Asia 3000 8/2/2020 Singapore
AL1788W6-7 Future Electronics - Europe 25 8/2/2020 England


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