BUY SG3524 https://www.utsource.net/itm/p/1037454.html
Regulating Pulse Width Modulator
Manufacturer: Texas Instruments Description: PWM Control Circuit Features: Pulse Width Modulation (PWM) Control Circuit Internal Regulator for Gate Drive Supply Undervoltage Lockout (UVLO) Programmable Oscillator Frequency Programmable Duty Cycle Outputs Source/Sink up to 200mA Output Clamp Diodes Outputs Can Be paralleled for Higher Current Internal Soft Start Internal Short Circuit Current Limiting Thermal Shutdown Available in 8-Pin DIP Package Applications: Switching Power Supplies Motor Controls Battery Chargers Inverters Uninterruptible Power Supplies (UPS) SMPS and DC-DC Converters (For reference only)