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UC1854B PDF预览

UC1854B

更新时间: 2024-11-22 22:41:51
品牌 Logo 应用领域
德州仪器 - TI 稳压器
页数 文件大小 规格书
16页 452K
描述
ADVANCED HIGH-POWER FACTOR PREREGULATOR

UC1854B 数据手册

 浏览型号UC1854B的Datasheet PDF文件第2页浏览型号UC1854B的Datasheet PDF文件第3页浏览型号UC1854B的Datasheet PDF文件第4页浏览型号UC1854B的Datasheet PDF文件第5页浏览型号UC1854B的Datasheet PDF文件第6页浏览型号UC1854B的Datasheet PDF文件第7页 
ꢀ ꢁ  
ꢀ ꢁ  
ꢀ ꢁ  
ꢂ ꢃꢄ ꢅꢆ  
ꢇ ꢃꢄ ꢅꢆ  
ꢊ ꢃꢄ ꢅꢆ  
ꢀꢁꢇ ꢃ ꢄ ꢅ ꢈꢉ  
ꢀꢁꢊ ꢃ ꢄ ꢅ ꢈꢉ  
SLUS329B − JUNE 1998 − REVISED FEBRUARY 2005  
ꢈꢋ ꢌꢈꢍꢁ ꢎꢋ ꢏꢐ ꢑꢏ ꢒꢓꢔ ꢕꢎ ꢖ ꢗꢈꢁꢘꢔ ꢖ  
ꢓꢖꢎ ꢖꢎꢑ ꢀꢙ ꢈꢘꢔ ꢖ  
FEATURES  
DESCRIPTION  
D
Controls Boost PWM to Near-Unity Power  
Factor  
The UC3854A/B products are pin compatible  
enhanced versions of the UC3854. Like the  
UC3854, these products provide all of the  
functions necessary for active power factor  
corrected preregulators. The controller achieves  
near unity power factor by shaping the AC input  
line current waveform to correspond to the AC  
input line voltage. To do this the UC3854A/B uses  
average current mode control. Average current  
mode control maintains stable, low distortion  
sinusoidal line current without the need for slope  
compensation, unlike peak current mode control.  
D
D
D
D
D
D
D
Limits Line Current Distortion To < 3%  
World-Wide Operation Without Switches  
Accurate Power Limiting  
Fixed-Frequency Average Current-Mode  
Control  
High Bandwidth (5 MHz), Low-Offset Current  
Amplifier  
Integrated Current- and Voltage Amplifier  
Output Clamps  
Multiplier Improvements: Linearity, 500 mV  
A 1% 7.5 V reference, fixed frequency oscillator,  
PWM, voltage amplifier with soft-start, line voltage  
V
Offset (Eliminates External Resistor), 0 V  
AC  
to 5 V Multout Common-Mode Range  
V GOOD Comparator  
REF  
Faster and Improved Accuracy ENABLE  
Comparator  
feedforward (V  
clamp, and over current comparator round out the  
list of features.  
squarer), input supply voltage  
RMS  
D
D
Available in the 16-pin N (PDIP), DW (SOIC-  
Wide), and J (CDIP) and 20-pin Q (PLCC)  
package. See ordering information on page 3 for  
availability by temperature range.  
D
UVLO Options (16 V/10 V or 10.5 V/10 V)  
D
300-µA Start-Up Supply Current  
BLOCK DIAGRAM  
VAO  
7
MOUT  
5
CAO PKLMT  
REF  
9
3
2
V
CC  
7.5 V REF  
(A) 16 V / 10 V  
(B) 10.5 V / 10 V  
RUN  
10  
ENA  
7.1 V  
IC  
POWER  
2.65 V / 2.15 V  
3 V  
15 VCC  
A
11  
6
VSENSE  
IAC  
R
R
S
B
C
16 GTDRV  
Q
2
X
8
VRMS  
SS  
RUN  
14 µA  
20 V  
13  
A   B  
IMOUT  
+
OSC  
1 GND  
C
4
14  
CT  
12  
UDG−03110  
ISENSE  
RSET  
ꢘꢥ  
Copyright 2003, Texas Instruments Incorporated  
ꢡ ꢥ ꢢ ꢡꢚ ꢛꢯ ꢝꢜ ꢠ ꢨꢨ ꢦꢠ ꢞ ꢠ ꢟ ꢥ ꢡ ꢥ ꢞ ꢢ ꢪ  
1
www.ti.com  

UC1854B 替代型号

型号 品牌 替代类型 描述 数据表
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