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UCC28051DRG4 Datasheet(PDF) 1 Page - Texas Instruments

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Part # UCC28051DRG4
Description  TRANSITION MODE PFC CONTROLLER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

UCC28051DRG4 Datasheet(HTML) 1 Page - Texas Instruments

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UCC28050, UCC28051
UCC38050, UCC38051
SLUS515F−SEPTEMBER 2002 − REVISED MARCH 2009
TRANSITION MODE PFC CONTROLLER
1
www.ti.com
FEATURES
D Transition Mode PFC Controller for Low
Implementation Cost
D Industry Pin Compatibility With Improved
Feature Set
D Improved Transient Response With
Slew-Rate Comparator
D Zero Power Detect to Prevent OVP During
Light Load Conditions
D Accurate Internal VREF for Tight Output
Regulation
D Two UVLO Options
D Overvoltage Protection (OVP),
Open-Feedback Protection and Enable
Circuits
D ± 750-mA Peak Gate Drive Current
D Low Start-Up and Operating Currents
D Lead (Pb)-Free Packages
APPLICATIONS
D Switch-Mode Power Supplies for Desktops,
Monitors, TVs and Set Top Boxes (STBs)
D AC Adapter Front-End Power Supplies
D Electronic Ballasts
DESCRIPTION
The
UCC38050
and
UCC38051
are
PFC
controllers for low-to-medium power applications
requiring compliance with IEC 1000-3-2 harmonic
reduction standard. It is designed for controlling a
boost preregulator operating in transition mode
(also referred to as boundary conduction mode or
critical conduction mode operation). It features a
transconductance voltage amplifier for feedback
error
processing,
a
simple
multiplier
for
generating a current command proportional to the
input
voltage,
a
current-sense
(PWM)
comparator, PWM logic and a totem-pole driver
for driving an external FET.
SIMPLIFIED APPLICATION DIAGRAM
UDG−02125
1
2
3
4
8
7
6
5
VCC
DRV
GND
ZCD
VO_SNS
COMP
MULTIN
CS
UCC38050
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
 2009, Texas Instruments Incorporated
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.


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