Current-Mode PWM Controller for Off-line Power Supplies
The NCP1250 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.
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 Conditions
Internal Ramp Compensation
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 VCCOperation
+300 mA / −500 mA Source/Sink Drive Capability
Less than 100 mW Standby Power at High Line
EPS 2.0 Compliant
These are Pb−Free Devices
Typical Applications
ac−dc Converters for TVs, Set−top Boxes and Printers
