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UCC28070_08

更新时间： 2024-11-06 04:48:15
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德州仪器 - TI 功率因数校正控制器
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39页 724K
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Interleaving Continuous Conduction Mode PFC Controller

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UCC28070_08 数据手册

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UCC28070  
www.ti.com  
SLUS794A–NOVEMBER 2007–REVISED MARCH 2008  
Interleaving Continuous Conduction Mode PFC Controller  
1
FEATURES  
APPLICATIONS  
•
High-Efficiency Server and Desktop Power  
Supplies  
•
Interleaved Average Current-Mode PWM  
Control with Inherent Current Matching  
•
Telecom Rectifiers  
•
•
Advanced Current Synthesizer Current  
Sensing for Superior Efficiency  
DESCRIPTION  
Highly-Linear Multiplier Output with Internal  
Quantized Voltage Feed-Forward Correction  
for Near-Unity PF  
The UCC28070 is an advanced power factor  
correction device that integrates two pulse-width  
modulators (PWMs) operating 180° out of phase.  
•
•
•
Programmable Frequency (10 kHz to 300 kHz)  
Programmable Maximum Duty-Cycle Clamp  
This  
interleaved  
PWM  
operation  
generates  
substantial reduction in the input and output ripple  
currents, and the conducted-EMI filtering becomes  
easier and less expensive. A significantly improved  
multiplier design provides a shared current reference  
to two independent current amplifiers that ensures  
matched average current mode control in both PWM  
outputs while maintaining a stable, low-distortion  
sinusoidal input line current.  
Programmable Frequency Dithering Rate and  
Magnitude for Enhanced EMI Reduction  
–
–
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  
The UCC28070 contains multiple innovations  
including current synthesis and quantized voltage  
feed-forward to promote performance enhancements  
in PF, efficiency, THD, and transient response.  
Features including frequency dithering, clock  
synchronization, and slew rate enhancement further  
expand the potential performance enhancements.  
•
•
Programmable Peak Current Limiting  
Bias-Supply UVLO, Over-Voltage Protection,  
Open-Loop Detection, and PFC-Enable  
Monitoring  
•
•
External PFC-Disable Interface  
The UCC28070 also contains a variety of protection  
features including output over-voltage detection,  
programmable peak-current limit, under-voltage  
lockout, and open-loop protection.  
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 © 2007–2008, Texas Instruments Incorporated  
1234567...39

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UCC28070A_12 TI

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UCC28070APW TI

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UCC28070APWR TI

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 		两相交错式连续导通模式 (CCM) PFC 控制器 | DW | 20 | -40 to
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 		两相交错式连续导通模式 (CCM) PFC 控制器 | DW | 20 | -40 to
UCC28070PW TI

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UCC28070PWG4 TI

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