A DC/DC controller providing a universal high-performance driver solution for a variety of mains-dimmable LED lamp designs, the AP1694, has been announced by Diodes Incorporated. Suitable for both 120V and 230V AC inputs, the controller uses Diodes’ patented PFM technology to tightly regulate LED current and achieve a high power factor and low total harmonic distortion.
Supporting non-isolated buck, buck-boost and isolated flyback topologies, the AP1694 enables between 10% and 50% reductions in total BOM costs. Boundary-conduction mode operation ensures high efficiency and low EMI driver characteristics. A primary side controller, the LED driver removes the need for opto-coupler and secondary-side control circuitry, while inherent stability eliminates the need for loop compensation.
Delivering a 5% initial LED current accuracy, the AP1694 meets the requirements of most mains-dimmable LED lighting applications. It is also compatible with a range of different dimmers, including both leading edge and trailing edge types. The LED driver complies with the NEMA SSL6 standard for dimming curves and meets the requirements of the IEC6100-3-2 harmonic standard, achieving deep dimming down to 1%.
The AP1694 also integrates comprehensive protection features, including open-load detection, over-voltage, short-circuit and over-temperature protection. The driver controller provides a higher power density with a simpler and smaller total circuit footprint for designers of mains-dimmable LED lamps, supplied in the small form factor SO-8 package. Additionally it requires only 26 external components in buck topology.
Priced at $0.50 (USD) each in 50,000 unit quantities, the AP1694 is available now. Diodes Incorporated supports the DC/DC controller with 120V and 240V evaluation boards for qualifying customers, an on-line LED lamp component calculator tool and a complete set of reference designs.