The AL1696 is based on buck or buck-boost topology and implements constant current conversion with a high power factor by operating in boundary conduction mode. This is also claimed to reduce switching noise, easing EMI/EMC testing and qualification. The design is said to require a single winding inductor and achieves a current sense tolerance of ±3%. The device features a low operating current of 120µA, with a 150µA start-up current, and is compatible with leading-edge and trailing-edge dimmers.
MOSFET options for 3A at 300V, 2A at 500V and 2A at 600V enable the AL1696 to be matched to end-market line-input voltage requirements and allow it to be used in LED lamps up to 12W. The AL1696 is offered in an SO-7 package that is configured with an extra pin space between the high-voltage MOSFET drain and its low-voltage pins to increase electrical isolation. The device also features internal protection for output short circuit, over-temperature, under-voltage lockout, leading-edge blanking and cycle-by-cycle over-current protection.
