NCP1249 Description
NCP1249 High-Voltage Current-Mode PWM Controller Featuring Peak Power Excursion and Extremely Low Stand-by Power Consumption .onsemi. The NCP1249 is a highly integrated high−voltage PWM controller capable of delivering a rugged and high performance offline power supply with extremely low no−load consumption. With a supply range up to 30 V, the controller hosts a jittered 65−kHz switching circuitry operated in peak...
NCP1249 Key Features
- either through a dedicated pin or via the VCC input
- High-voltage Current Source for Lossless Start-up Sequence
- Remote Input for Standby Operation Control
- Automatic and Lossless X2 Capacitors Discharge Function
- Internal and Adjustable Over Power Protection (OPP)
- +300 mA/ -500 mA Source/Sink Drive Capability
- Internal Brown-Out Protection Circuit
- Adjustable Ramp pensation
- Internally Fixed 4-ms Soft-start
- Frequency Jittering in Normal and Frequency Foldback