DIODES AL1788W6-7

The AL1788 is a high performance AC/DC Power Factor Correction (PFC) controller targeting at LED lighting applications. Based on Primary Side Regulation (PSR) implementation, it 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. With either Flyback or Buck topology, the AL1788 system supports high efficiency, high Power Factor (PF > 0.9) and low Total Harmonic Distortion (THD < 20%) for universal input at wide loading range (50% loading to 100% loading). The AL1788 features low start - up current, low operation current and low standby power. It has rich protection features including Over Voltage Protection (OVP), Short Circuit Protection (SCP), Over Current Protection (OCP) and Over Temperature Protection (OTP). The AL1788 is available in SOT26 (SC74R) package for the controller.

• 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
• Totally Lead - Free & Fully RoHS Compliant
• Halogen and Antimony Free. “Green” Device

• 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