The UC2825N is a voltage-mode, constant-frequency, pulse-width modulation (PWM) controller from Texas Instruments. It is used to generate high-frequency, high-efficiency, low-ripple switch-mode power supplies for both AC-DC and DC-DC applications. It integrates an error amplifier, a high-gain oscillator, an output logic circuit, and protection circuits for both over-voltage and over-current. It is available in space-saving SOIC-8, PDIP-8, and VSON-8 packages.