DESCRIPTION
●The UCC28180 is a flexible and easy-to-use, 8-pin, active Power Factor Correction (PFC) controller that operates under Continuous Conduction Mode (CCM) to achieve high Power Factor, low current distortion and excellent voltage regulation of boost pre regulators in AC - DC front-ends. The controller is suitable for universal AC input systems operating in 100-W to few-kW range with the switching frequency programmable between 18 kHz to 250 kHz, to conveniently support both power MOSFET and IGBT switches. An integrated 1.5-A and 2-A (SRC-SNK) peak gate drive output, clamped internally at 15.2 V (typical), enables fast turn-on, turn-off and easy management of the external power switch without the need for buffer circuits.
●FEATURES
●• 8-pin Solution (no AC line sensing needed)
●• Wide Range Programmable Switching Frequency (18 kHz to 250 kHz for MOSFET and IGBT based PFC converters)
●• Trimmed Current Loop Circuits for Low iTHD
●• Reduced Current Sense Threshold (minimizes power dissipation in shunt)
●• Average Current-Mode Control
●• Soft Over Current and Cycle-by-Cycle Peak Current Limit Protection
●• Output Over-Voltage Protection with Hysteresis Recovery
●• Audible Noise Minimization Circuitry
●• Open Loop Detection
●• Enhance Dynamic Response During Output Over and Under-Voltage Conditions
●• Maximum Duty Cycle of 96% (typical)
●• Burst Mode for No Load Regulation
●• VCC UVLO, Low ICC Start-Up (<75 µA)
