NCP1336B
NCP1336B is Quasi-Resonant PWM Controller manufactured by onsemi.
- Part of the NCP1336A comparator family.
- Part of the NCP1336A comparator family.
NCP1336A/B
Quasi-Resonant Current
Mode Controller for High
Power Universal Off-Line
Supplies
The NCP1336 hosts a high- performance circuitry aimed to
.onsemi. powering quasi- resonant converters. Capitalizing on a novel
QUASI- RESONANT PWM valley- lockout system, the controller shifts gears and reduces the
CONTROLLER FOR HIGH POWER switching frequency as the power loading bees lighter. This
AC- DC WALL ADAPTERS 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
SO- 14 CASE 751AN
SUFFIX O
MARKING DIAGRAM 14
NCP1336x G AWLYWW
= Assembly Location x
= A or B
WL = Wafer Lot
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.
= Year
WW = Work Week
= Pb- Free Package
Particularly well suited for adapter applications, the controller
Features two latch inputs: one dedicated to Over Temperature protection (OTP) which offers an easy means to connect a pull- down temperature sensor like an NTC, and a second one more classical that can be used to perform an accurate Over Voltage Protection.
Finally, a brownout pin which stops the circuit operation in presence of a low mains condition is included.
PIN CONNECTIONS
OPP OTP Timer ZCD
Ct
OVP BO...
