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BUY NCP1377BDR2 https://www.utsource.net/itm/p/357498.html
PWM Current-Mode Controller for Free-Running Quasi-Resonant Operation
Package: SOP-8 Manufacturer: ON Semiconductor Description: The NCP1377BDR2 is a high voltage, high performance, fixed frequency current mode PWM controller. It is specifically designed for off-line and DC-to-DC converter applications. Features: High Voltage Start-up Low Start-up Current Internal Slope Compensation Internal Soft-Start Internal Leading Edge Blanking Internal Over-Current Protection Internal Thermal Shutdown Internal Frequency Foldback Internal Synchronization External Synchronization Low Standby Power Low Operating Current Applications: Off-line SMPS DC-to-DC Converters LED Lighting (For reference only)