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UC2853A Fiches technique(PDF) 1 Page - Texas Instruments

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No de pièce UC2853A
Description  8-Pin Continuous Conduction Mode (CCM) PFC Controller
Download  49 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

UC2853A Fiches technique(HTML) 1 Page - Texas Instruments

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1
FEATURES
DESCRIPTION
APPLICATIONS
CONTENTS
TYPICAL APPLICATION DIAGRAM
+
Bridge
Rectifier
LINE
INPUT
V
OUT
EMI Filter
UCC28019
R
load
GND
ICOMP
ISENSE
GATE
VCC
VSENSE
VCOMP
VINS
1
2
3
4
8
7
6
5
Auxilary
Supply
UCC28019
SLUS755B – APRIL 2007 – REVISED DECEMBER 2007
www.ti.com
8-Pin Continuous Conduction Mode (CCM) PFC Controller
• 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 in
Continuous Conduction Mode (CCM). The controller
• Wide-Range Universal AC Input Voltage
is suitable for systems in the 100 W to >2 kW range
• Fixed 65-kHz Operating Frequency
over a wide-range universal ac line input. Startup
• Maximum Duty Cycle of 97%
current during under-voltage lockout is less than 200
µA. The user can control low power standby mode by
• Output Over/Under-Voltage Protection
pulling the VSENSE pin below 0.77 V.
• Input Brown-Out Protection
Low-distortion wave-shaping of the input current
• Cycle-by-Cycle Peak Current Limiting
using 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 frequency is
internally fixed and trimmed to better than 5%
• CCM Boost Power Factor Correction Power
accuracy at 25
°C. Fast 1.5-A gate peak current drives
Converters in the 100 W to >2 kW Range
the external switch.
• Server and Desktop Power Supplies
Numerous system-level protection features include
• Telecom Rectifiers
peak
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 Characteristics 3
boost current during start-up. A trimmed internal
reference provides accurate protection thresholds
• Device Information 10
and regulation set-point. An internal clamp limits the
• Application Information 12
gate drive voltage to 12.5 V.
• Design Example 23
• Additional References 43
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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