DESCRIPTION

· The UCC28510 series combines PFC and PWM controllers for off-line power systems, ensuring compliance with IEC1000-3-2 harmonic reduction standards.

· Integrates control and drive signals for both PFC and PWM stages, enhancing performance and reducing costs.

· Utilizes leading-edge modulation for PFC and trailing-edge modulation for PWM to minimize boost capacitor ripple current.

· Features a highly linearized multiplier circuit for low distortion reference signals across various line and load conditions.

· Includes a transconductance voltage amplifier for processing output voltage errors and a current error amplifier for accurate inductor current tracking.

FEATURES

· Controls both PFC and PWM power stages within a single device.

· Implements leading-edge PFC and trailing-edge PWM modulation to reduce ripple.

· Built-in sequencing for PFC and PWM turn-on.

· Provides 2-A source and 3-A sink gate drive for both PFC and PWM stages.

· Offers typical 16-ns rise time and 7-ns fall time into 1-nF loads.

· PFC features include average-current-mode control, highly-linear multiplier, input voltage feedforward, improved load transient response, accurate power limiting, and zero power detect.

· PWM features include peak-current-mode control, 1:1 or 1:2 PFC:PWM frequency options, programmable maximum duty cycle, and programmable soft-start.

APPLICATIONS

· Suitable for off-line power systems requiring harmonic reduction compliance.

· Ideal for applications needing integrated PFC and PWM control for enhanced performance and cost efficiency.

· Effective in systems where minimizing boost capacitor ripple current is critical.

· Applicable in environments requiring precise control over inductor current and output voltage errors.