The NCL30170 from ON Semiconductor is a linear, constant-current LED controller for use in smart lighting and phase-cut dimming systems.
The controller manages multiple LED channels in series using ON Semiconductor’s proprietary auto-commutation topology. It off ers highly accurate regulation of the constant-current output, as well as giving a high power factor of 0.99 and total harmonic distortion of less than 10%.
When designers use the NCL30170 to implement a direct AC LED driver circuit, they can achieve a very low system bill-of-materials cost as well as robust driver performance. The device provides a wide analog dimming range down to 5% of maximum brightness with a linear dimming curve. In phase-cut dimming applications, input-current shape modulation provides both a good power factor and excellent dimmer compatibility.