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BUY UC3544N https://www.utsource.net/itm/p/148210.html
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Description: The UC3544N is a high performance fixed frequency current mode controller. It is specifically designed for Off-Line and DC-to-DC converter applications offering the designer a cost effective solution with minimal external components. Features: - High Performance Fixed Frequency Current Mode Control - Low Start Up Current - Internal Slope Compensation - Low Operating Current - Internal Soft Start - Pulse-by-Pulse Current Limiting - Output Clamp for Cycle-by-Cycle Current Limiting - Under Voltage Lockout with Hysteresis Applications: - Off-Line and DC-to-DC Converters - Switching Regulators - Motor Controls - Solenoid/Relay Drivers - High Voltage Supplies (For reference only)