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BUY VIPER50SP https://www.utsource.net/itm/p/11243676.html
IC SWIT PWM SMPS CM POWERSO10
Package Type: HSOP10 Manufacturer: STMicroelectronics Description: The VIPER50SP is a high-performance, low-power, monolithic integrated circuit designed for use as an off-line SMPS (Switch Mode Power Supply) controller. Features: Low start-up current Low operating current Internal start-up and operating frequency Internal soft-start Internal over-voltage protection Internal over-current protection Internal thermal shutdown Internal current limit Internal frequency jitter Internal voltage feedback Internal current feedback Applications: AC/DC adapters Battery chargers Switching regulators Motor control Lighting control (For reference only)