NCP1251 Description
Current-Mode PWM Controller for Off-line Power Supplies NCP1251 The NCP1251 is a highly integrated PWM controller capable of delivering a rugged and high performance offline power supply in a tiny TSOP−6 package. With a supply range up to 28 V, the controller hosts a jittered 65 kHz or 100 kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the...
NCP1251 Key Features
- Fixed-Frequency 65 or 100 kHz Current-Mode Control Operation
- Internal and Adjustable Over Power Protection (OPP) Circuit
- Frequency Foldback Down to 26 kHz and Skip-Cycle in Light Load
- Internal Ramp pensation
- Internal Fixed 4 ms Soft-Start
- 100 ms Timer-Based Auto-Recovery Short-Circuit Protection
- Frequency Jittering in Normal and Frequency Foldback Modes
- Option for Auto-Recovery or Latched Short-Circuit Protection
- OVP Input for Improved Robustness
- Up to 28 V VCC Operation