The UCC28019 8-pin active Power Factor Correction (PFC) controller uses the boost topology operating in Continuous Conduction Mode (CCM)

UCC28019

Manufacturer Part NumberUCC28019
DescriptionThe UCC28019 8-pin active Power Factor Correction (PFC) controller uses the boost topology operating in Continuous Conduction Mode (CCM)
ManufacturerTexas Instruments
UCC28019 datasheet
 


Specifications of UCC28019

Uvlo Thresholds On/off(v)10.5/9.5Operating Supply(max)(v)22
Startup Current(ma)0.1Operating Supply Current(ma)7
Vref(v)5Vref Tol(%)2
Duty Cycle(max)(%)99.3Practical Operating Frequency(max)(mhz)0.65
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UCC28019
SLUS755B – APRIL 2007 – REVISED DECEMBER 2007
Layout Guidelines
As with all PWM controllers, the effectiveness of the filter capacitors on the signal pins depends upon the
integrity of the ground return. The pinout of the UCC28019 is ideally suited for separating the high di/dt induced
noise on the power ground from the low current quiet signal ground required for adequate noise immunity. A star
point ground connection at the GND pin of the device can be achieved with a simple cut out in the ground plane
of the printed circuit board. As shown in
(C11, C12, C15, C17, and C16, respectively) must all be returned directly to the quiet portion of the ground
plane, indicated by Signal GND, and not the high current return path of the converter, shown as the Power GND.
Because the example circuit in
Figure 27
own dedicated return to the GND pin.
Figure 27. Recommended Layout for the UCC28019
22
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Figure
27, the capacitors on ISENSE, VINS, VCOMP, and VSENSE
uses surface mount components, the ICOMP capacitor, C10, has its
GND
GATE
VCC
ICOMP
ISENSE
VSENSE
VINS
VCOMP
Product Folder Link(s):
UCC28019
www.ti.com
Power
GND
Cut out in
ground plane
Signal
GND
Copyright © 2007, Texas Instruments Incorporated