UCC28070A
www.ti.com
SLUSAW0 –MARCH 2012
Extended Frequency Range (10 kHz to 300 kHz),
Interleaving Continuous Conduction Mode PFC Controller
Check for Samples: UCC28070A
1
FEATURES
APPLICATIONS
•
Interleaved Average Current-Mode PWM
Control with Inherent Current Matching
•
•
•
Air Conditioners and White Goods
PFC Applications with IGBT Power Switches
•
•
Advanced Current Synthesizer Current
Sensing for Superior Efficiency
High-Efficiency Server and Desktop Power
Supplies
Highly-Linear Multiplier Output with Internal
Quantized Voltage Feed-Forward Correction
for Near-Unity PF
•
•
Telecom Rectifiers
Industrial Equipment
•
Extended Range Programmable Frequency (10
kHz to 300 kHz)
DESCRIPTION
The UCC28070A is an extended frequency range
derivative of UCC28070, capable of operating at low
switching frequencies desired for IGBT power switch
based PFC converters in high power applications.
•
•
Programmable Maximum Duty-Cycle Clamp
Programmable Frequency Dithering Rate and
Magnitude for Enhanced EMI Reduction
The UCC28070A is capable of operating in frequency
range 10 kHz to 300 khz, thus extending the range of
operation compared to UCC28070 whose minimum
operating frequency was limited to 30 khz. All the
other features and benefits of UCC28070 are also
available in UCC28070A. The 180 degree out-of-
phase interleaved operation generates substantial
reduction in input and output ripple currents and
conducted EMI filtering becomes easier and less
expensive.
–
–
Magnitude: 3 kHz to 30 kHz
Rate: Up to 30 kHz
•
•
External Clock Synchronization Capability
Enhanced Load and Line Transient Response
through Voltage Amplifier Output Slew-Rate
Correction
•
•
Programmable Peak Current Limiting
Bias-Supply UVLO, Over-Voltage Protection,
Open-Loop Detection, and PFC-Enable
Monitoring
•
•
External PFC-Disable Interface
Open-Circuit Protection on VSENSE and
VINAC pins
•
•
Programmable Soft Start
20-Lead TSSOP Package
Simplified Application Diagram
VIN
L1
D1
VOUT
COUT
12V to 21V
To CSB
CCDR
T1
1
2
3
4
5
6
7
8
9
CDR
RDM
VAO
DMAX 20
RT 19
RS
RDMX
RRT
RRDM
RA
SS 18
CSS
M1
VSENSE GDB 17
VINAC
IMO
GND 16
VCC 15
RIMO
RSYN
RB
RSYNTH GDA 14
L2
D2
CSB
CSA
VREF 13
CAOA 12
To CSA
10 PKLMT CAOB 11
T2
RS
From Ixfrms
RA
CZV
CZC
CZC
RPK1
CREF
CPV
CPC
CPC
M2
RPK2
RB
RZV
RZC
RZC
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated