This document mainly introduces the features and characteristics of the UC3548 product, including primary power supply voltage feed-forward control, accurate DC control, accurate programmable maximum duty cycle clamp, maximum volt-second product clamp, practical operation frequency up to 1MHz, high current (2A peak) Totem Pole output driver, wide bandwidth (8MHz) current error amplifier, undervoltage lockout monitor VCC, VIN and VREF, low startup current (500µA) and other