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) https://www.utsource.net/itm/p/148210.html