NCP1336BG SOP-13

توضیحات

The NCP1336 hosts a high−performance circuitry aimed to

powering quasi−resonant converters. Capitalizing on a novel

valley−lockout system, the controller shifts gears and reduces the

switching frequency as the power loading becomes lighter. This

results in a stable operation despite switching events always occurring

in the drain−source valley. This system works down to the 4th valley
and toggles to a variable frequency mode beyond, ensuring an
excellent standby power performance.

The controller takes benefit of a high−voltage start−up current

source to provide a quick and lossless power−on sequence. To improve

the safety in overload situations, the controller includes an Over Power

Protection circuit which clamps the delivered power at high−line.
Safety−wise, an adjustable timer relies on the feedback voltage to

detect a fault. On version B, this fault triggers a triple−hiccup on the
VCC pin which naturally reduces the average input power drawn by

the converter. On version A, when a fault is detected, the controller is
latched−off.
Particularly well suited for adapter applications, the controller
features two latch inputs: one dedicated to Over Temperature