Diodes AP1694 mains-dimmable LED lamp driver

The Diodes AP1694 is an AC-DC controller providing a universal high-performance driver solution for a variety of mains-dimmable LED lamp designs. Suitable for 120 and 230 VAC inputs while supporting non-isolated buck, buck-boost and isolated flyback topologies, the part enables 10-50% reductions in BOM costs.

The controller uses Diodes’ PFM technology to tightly regulate LED current and achieve a high power factor and low total harmonic distortion. By operating in boundary-conduction mode, the product also assures high efficiency and low EMI driver characteristics. As a primary side controller, the part removes the need for optocoupler and secondary-side control circuitry and, being inherently stable, eliminates the need for loop compensation.

The device delivers a 5% initial LED current accuracy, meeting the requirements of most mains-dimmable LED lighting applications, and is compatible with a wide range of dimmers, including both leading-edge and trailing-edge types. It achieves deep dimming down to 1%, complies with the NEMA SSL6 standard for dimming curves and meets the requirements of the IEC6100-3-2 harmonic standard.

Provided in the small form factor SO-8 package and requiring only 26 external components in buck topology, the controller offers designers of mains-dimmable LED lamps high power density with a simple and small total circuit footprint. The device also integrates comprehensive protection features, including open-load detection, over-voltage, short-circuit and over-temperature protection.

The part is supported by 120 and 240 V evaluation boards for qualifying users, an online LED lamp component calculator tool and a complete set of reference designs.