AL1788 Off-Line LED Driver

Product Highlights > AL1788 Off-Line LED Driver

            AL1788 Off-Line LED Driver
                    Diodes' AL1788 low standby power PFC controller
    

Diodes' AL1788 is a high-performance AC/DC power factor correction (PFC) controller targeted at smart connected LED lighting and IoT applications. Based on primary side regulation (PSR) implementation, AL1788 does not require an optocoupler or any secondary feedback circuit to save overall BOM cost. It operates at quasi-resonant (QR) mode where the MOSFET is turned on at the valley of the drain voltage, which minimizes switching loss to result in high efficiency.

Operating in both flyback and buck topologies, the AL1788 system supports high efficiency isolated and non-isolated lamp/IoT configurations respectively. The AL1788 incorporates overvoltage, overcurrent, and short-circuit protection as well as overtemperature protections resulting in a robust solution.

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)
Low standby power
Low system BOM cost
Controller with external MOSFET