NCP1249
Overview
- A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb-Free Package power excursion when the peak current hits the limit. At this point, the switching frequency is increased from 65 kHz to 130 kHz until the peak requirement disappears. The timer duration is then modulated as the converter crosses a peak power excursion mode (long) or undergoes a short circuit (short). NCP1249 comes in both Active ON (A and B versions) and Active OFF (C and D versions).
