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BUY VIPER20SP https://www.utsource.net/itm/p/1919697.html
SMPS PRIMARY I.C.
Description: The VIPER20SP is a high-performance, low-power, monolithic integrated circuit, designed for use as a fixed frequency current mode PWM controller. Features: * High-performance, low-power monolithic integrated circuit * Fixed frequency current mode PWM controller * Internal oscillator with programmable frequency up to 500 kHz * Internal soft-start * Internal over-current protection * Internal over-temperature protection * Internal under-voltage lockout Applications: * Switching power supplies * DC-DC converters * Motor control * Battery chargers (For reference only)