onsemi NCP1249C
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 MARKING DIAGRAM up to 30 V, the controller hosts a jittered 65 kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the controller automatically folds back its switching frequency down to a minimum level of 26 kHz.| Part No. | NCP1249C |
|---|---|
| Datasheet | NCP1249C Download |
| Manufacturer |  onsemi |
| Description | High-Voltage Current-Mode PWM Controller |
| Buy | Stock & Price |
FEATURES
● High−Voltage Current Source for Lossless Start−up Sequence X2 FB/REM OPP/Latch Timer 1 (Top View) HV VCC DRV GND● Automatic and Lossless X2 Capacitors Discharge Function
● 65 kHz Fixed−Frequency Current−Mode Control Operation with 130 kHz Excursion
● Internal and Adjustable Over Power Protection (OPP)
● Up to 30 V VCC Maximum Rating Circuit
● 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 Controlled Self−Relaxing Off Mode in Light Load Conditions
● Adjustable Ramp Compensation
● Option for Auto−Recovery or Latched Short−Circuit Protection
● Internally Fixed 4 ms Soft−Start
● Internal Thermal Shutdown with Hysteresis
● Adjustable Timer-Based Auto−Recovery
● These are Pb−Free Devices Overload/Short−Circuit Protection
● 100% to 25% Timer Reduction from Overload to Short−Circuit Fault
● Frequency Jittering in Normal and Frequency Foldback Modes Typ...
