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BUY UC3842BN https://www.utsource.net/itm/p/1431626.html
1A, 52kHz 250kHz Max Current Mode PWM Control Circuit with 16V UVLO Threshold and 96% Max Duty Cycle; Package: 8 LEAD PDIP; No of Pins: 8; Container: Rail; Qty per Container: 50
Description: The UC3842BN is a high performance fixed frequency current mode controller. Features: * Low start-up current * Internal slope compensation * Internal soft-start * Pulse-by-pulse current limiting * Short circuit protection * Thermal shutdown Applications: * Switching power supplies * Uninterruptible power supplies * Motor controls * Battery chargers (For reference only)