Texas Instruments UCC28511 Advanced PFC/PWM Combination Controllers UCC28511N

The UCC28511N is an advanced combination controller designed for power factor correction (PFC) and pulse-width modulation (PWM) applications. It integrates control functionality for both PFC and PWM stages into a single device, which can lead to performance and cost efficiencies in off-line power systems. The controller features leading-edge modulation for PFC and trailing-edge modulation for PWM, effectively minimizing ripple current in the boost capacitor. Key specifications include a 2-A source and 3-A sink gate drive capability, with a typical rise time of 16 ns and fall time of 7 ns into 1-nF loads. The PFC section employs average-current-mode control and a highly linear multiplier for near-unity power factor, while the PWM section utilizes peak-current-mode control with programmable maximum duty cycle and soft-start features. The device also includes various protections such as under-voltage lockout (UVLO), peak current limiting, and zero power detection. The UCC28511N is available in a 20-pin PDIP package and operates over a temperature range of -40°C to 105°C. This product is suitable for engineers looking for a reliable solution to meet IEC1000-3-2 harmonic reduction requirements in their power supply designs.