NCP1249D Description
NCP1249C, NCP1249D High-Voltage CurrentMode PWM Controller Featuring Peak Power Excursion and Self-Relaxing Off Mode The NCP1249 is a highly integrated high−voltage PWM controller http://onsemi. capable of delivering a rugged and high performance offline power supply with extremely low no−load consumption. With a supply range MARKING DIAGRAM up to 30 V, the controller hosts a jittered 65 kHz switching circuitry...
NCP1249D Key Features
- either through a dedicated pin or via the VCC input
- High-Voltage Current Source for Lossless Start-up Sequence
- Automatic and Lossless X2 Capacitors Discharge Function
- Internal and Adjustable Over Power Protection (OPP)
- Up to 30 V VCC Maximum Rating
- Internal Brown-Out Protection Circuit
- +300 mA/ -500 mA Source/Sink Drive Capability
- Extremely Low No-Load Standby Power via
- Frequency Foldback Down to 26 kHz and Skip-Cycle
- Adjustable Ramp pensation