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參數(shù)資料
| 型號： | UCC38517 |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | ADVANCED PFC/PWM COMBINA CONTROLLERS |
| 中文描述： | 高級式PFC /脈寬調(diào)制COMBINA控制器 |
| 文件頁數(shù)： | 12/39頁 |
| 文件大?。?/td> | 725K |
| 代理商： | UCC38517 |
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SLUS517B DECEMBER 2002 REVISED AUGUST 2004
12
www.ti.com
APPLICATION INFORMATION
The UCC28510 series of combination controllers include a power factor correction (PFC) controller that is
synchronized with a pulse width modulator (PWM) controller integrated into one chip. The PFC controller has
all of the features for an average current mode controlled PFC. The PWM controller has all of the features for
an isolated peak current program mode controlled converter. The two controllers are synchronized at a fixed
frequency so that the PFC controller is leading edge modulated (LEM) and the PWM controller is trailing edge
modulated (TEM). The LEM/TEM combination reduces the ripple current in the energy storage capacitor of the
PFC stage. A comparison between the ripple current in the energy storage capacitor with traditional TEM/TEM
modulation versus LEM/TEM modulation is shown in Figure 2.
Q1
Q2
iD1
iQ2
iES
iES= iD1 iQ2
ON
OFF
ON
OFF
ON
OFF
ON
OFF
T
T
TEM/TEM
LEM/TEM
D1
L1
+
–
DAC
VAC
L2
iES
LOAD
CES
Q1
Q2
D2
iD1
iQ2
iIN
iL
COUT
PFC BOOST CONVERTER
BUCK DERIVED CONVERTER
Figure 2. Equivalent PFC+PWM Power Supply System and the Comparison of the Energy Storage
Capacitor Current for Traditional TEM/TEM with LEM/TEM Controllers.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UCC28517N | ADVANCED PFC/PWM COMBINATION CONTROLLERS |
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| UCC2882 | Average Current Mode Synchronous Controller With 5-Bit DAC |
| UCC2882- | Average Current Mode Synchronous Controller With 5-Bit DAC |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCC38531 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Universal Serial Bus Power Controller |
| UCC3857 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Isolated Boost PFC Preregulator Controller |
| UCC3857N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IC-PFC PRE-REGULATOR |
| UCC3858 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High Efficiency, High Power Factor Preregulator |
| UCC3858J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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