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UCC28070A PDF预览

UCC28070A

更新时间: 2024-11-28 11:57:43
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德州仪器 - TI /
页数 文件大小 规格书
43页 1062K
描述
Extended Frequency Range (10 kHz to 300 kHz)

UCC28070A 数据手册

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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  

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