BUY UC2842B=2842B https://www.utsource.net/itm/p/5341506.html

Description: The UC2842B is a high performance current mode PWM controller. Features: High Speed Current Mode Control Internal Slope Compensation Low Start-up Current Low Operating Current Internal Soft-Start Internal Oscillator Output Clamp for Cycle-by-Cycle Current Limiting Under Voltage Lockout with Hysteresis Thermal Shutdown Output Short-Circuit Protection Output Open-Circuit Protection Output Over-Voltage Protection Output Under-Voltage Protection Output Over-Current Protection Output Over-Temperature Protection Output Over-Power Protection Application: Switch Mode Power Supplies Uninterruptible Power Supplies Battery Chargers Motor Drives SMPS for Telecom and Computer Applications (For reference only)