UCC
2806
0
www.ti.com
SLUS767A – MAY 2007 – REVISED MAY 2007
Natural Interleaving™
DUAL-PHASE TRANSITION-MODE PFC CONTROLLER
NATURAL INTERLEAVING FEATURES
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Easy Phase Management Facilitates
Compliance to Light-Load Efficient Standards
FailSafe OVP with Dual Paths Prevents Output
Over-voltage Conditions Caused by
Voltage-Sensing Failures
Sensorless Current Shaping Simplifies Board
Layout and Improves Efficiency
Inrush Safe Current Limiting:
– Prevents MOSFET conduction during
inrush
– Eliminates reverse recovery events in
output rectifiers
SYSTEM FEATURES
•
•
•
Cost Savings
Improved Efficiency and Design Flexibility
over Traditional, Single-Phase Continuous
Conduction Mode (CCM)
Input Filter and Output Capacitor Current
Cancellation:
– Reduced current ripple for higher system
reliability and smaller bulk capacitor
– Reduced EMI filter size
Enables Use of Low-Cost Diodes without
Extensive Snubber Circuitry
Improved Light-Load Efficiency
Improved Transient Response
Complete System-Level Protection
1 A Source/1.8 A Sink Gate Drivers
Operating Temperature Range: –40°C to
+125°C in an SOIC 16-pin package
•
•
•
•
•
•
•
•
85-265VAC
400 VDC
-
+
EMI
Filter
VCC
ZCDA
GDA
APPLICATIONS
•
•
•
•
•
100 W to 1 kW Power Supplies
LCD, Plasma, and DLP
®
TVs
Computer Power Supplies
Entry Level Servers
Electronic Lighting Ballasts
5
P
OUT
= 600 W
V
OUT
= 400 V
CS
VINAC
ZCDB
UCC28060
GDB
TSET
PWMCNTL
VSENSE
COMP
PHB
Power-Good to Downstream Converter
VREF
Capacitor Ripple Current (A)
4
1-Phase TM
HVSEN
AGND
PGND
3
1-Phase CCM
Typical Application Circuit
2
2-Phase TM Interleave
1
70
120
170
Input Voltage (V)
220
270
Ripple Current Reduction
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.
DLP is a registered trademark of Texas Instruments.
Natural Interleaving is a trademark of Texas Instuments.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
