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UCC28019D-UCC28019DR-UCC28019DRG4
8-Pin Continuous Conduction Mode (CCM) PFC Controller
1FEATURES DESCRIPTION
APPLICATIONS
CONTENTS
TYPICAL APPLICATION DIAGRAM– Bridge
Rectifier
LINE
INPUT
VOUTEMI Filter
UCC28019load
GND
ICOMP
ISENSE
GATE
VCC
VSENSE
VCOMPVINS
Auxilary
Supply
8-pin Solution Without Sensing Line Voltage The UCC28019 8-pin active Power Factor Correction
Reduces External Components (PFC) controller uses the boost topology operating
Continuous Conduction Mode (CCM). The controller•
Wide-Range Universal AC Input Voltage suitable for systemsin the 100Wto >2 kW range•
Fixed 65-kHz Operating Frequency overa wide-range universal ac line input. Startup•
Maximum Duty Cycleof 97% current during under-voltage lockoutis less than 200
μA. The user can control low power standby modeby•
Output Over/Under-Voltage Protectionpulling the VSENSE pin below 0.77V.•
Input Brown-Out ProtectionLow-distortion wave-shaping of the input current•
Cycle-by-Cycle Peak Current Limitingusing average current mode control is achieved•
Open Loop Detection without input line sensing, reducing the Bill of•
Low-Power User Controlled Standby Mode Materials component count. Simple external networks
allow for flexible compensation of the current and
voltage control loops. The switching frequencyis
internally fixed and trimmed to better than 5%•
CCM Boost Power Factor Correction Power accuracyat 25°C. Fast 1.5-A gate peak current drives
Convertersin the 100Wto>2 kW Range the external switch.•
Server and Desktop Power SuppliesNumerous system-level protection features include•
Telecom Rectifierspeak current limit, soft over-current detection,•
Industrial Electronics open-loop detection, input brown-out detection,•
Home Electronics output over-voltage protection/under-voltage
detection,a no-power discharge path on VCOMP,
and overload protection on ICOMP. Soft-Start limits•
Electrical Characteristics3 boost current during start-up.A trimmed internal
reference provides accurate protection thresholds•
Device Information10and regulation set-point. An internal clamp limits the•
Application Information12 gate drive voltageto 12.5V.•
Design Example23 Additional References43
