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UC2854BDWTR PDF预览

UC2854BDWTR

更新时间： 2024-11-01 23:38:55
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
7页 190K
描述
Power Factor Controller

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中文翻译

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UC2854BDWTR 数据手册

 浏览型号UC2854BDWTR的Datasheet PDF文件第2页浏览型号UC2854BDWTR的Datasheet PDF文件第3页浏览型号UC2854BDWTR的Datasheet PDF文件第4页浏览型号UC2854BDWTR的Datasheet PDF文件第5页浏览型号UC2854BDWTR的Datasheet PDF文件第6页浏览型号UC2854BDWTR的Datasheet PDF文件第7页 
UC1854A/B  
UC2854A/B  
UC3854A/B  
Enhanced High Power Factor Preregulator  
FEATURES  
DESCRIPTION  
•
Controls Boost PWM to Near Unity  
The UC1854A/B products are pin compatible enhanced versions of the  
UC1854. Like the UC1854, 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 UC1854A/B uses average current mode control. Average current  
mode control maintains stable, low distortion sinusoidal line current  
Power Factor  
•
•
•
•
Limits Line Current Distortion To <3%  
World-Wide Operation Without Switches  
Accurate Power Limiting  
Fixed Frequency Average Current Mode without the need for slope compensation, unlike peak current mode  
Control  
control.  
•
•
•
High Bandwidth (5MHz), Low Offset  
Current Amplifier  
The UC1854A/B products improve upon the UC1854 by offering a wide  
bandwidth, low offset Current Amplifier, a faster responding and  
improved accuracy enable comparator, a VREF "good" comparator,  
UVLO threshold options (16/10V for offline, 10.5/10V for startup from  
an auxiliary 12V regulator), lower startup supply current, and an  
enhanced multiply/divide circuit. New features like the amplifier output  
clamps, improved amplifier current sinking capability, and low offset  
VAC pin reduce the external component count while improving  
performance. Improved common mode input range of the Multiplier  
output/Current Amp input allow the designer greater flexibility in  
choosing a method for current sensing. Unlike its predecessor, RSET  
controls only oscillator charging current and has no effect on clamping  
the maximum multiplier output current. This current is now clamped to  
Integrated Current and Voltage Amp  
Output Clamps  
Multiplier Improvements: Linearity,  
500mV VAC Offset (eliminates external  
resistor), 0-5V Multout Common Mode  
Range  
•
•
VREF "GOOD" Comparator  
Faster and Improved Accuracy ENABLE  
Comparator  
a maximum of 2 IAC at all times which simplifies the design process  
and provides foldback power limiting during brownout and extreme low  
line conditions.  
*
•
•
UVLO Threshold Options  
(16/10V / 10.5/10V)  
300µA Startup Supply Current  
A 1% 7.5V reference, fixed frequency oscillator, PWM, Voltage  
Amplifier with softstart, line voltage feedforward (VRMS squarer), input  
supply voltage clamp, and over current comparator round out the list of  
features.  
UVLO Turn on UVLO Turn off  
UC1854A  
UC1854B  
16V  
10V  
10V  
10.5V  
BLOCK DIAGRAM  
UDG-93001-1  
6/98  
1234567

中文翻译

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UC2854BDWTR 替代型号

型号 品牌 替代类型 描述 数据表
UC2854BDW TI

完全替代

 ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854ADW TI

类似代替

 ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC3854BDW TI

类似代替

 ADVANCED HIGH-POWER FACTOR PREREGULATOR

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UC2854BDWTRG4 TI

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 		ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854B-EP TI

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 		ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854BJ TI

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 		ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854BL TI

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 		Analog IC
UC2854BM TI

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 		High Power Factor Preregulator
UC2854BMDWREP TI

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 		增强型产品高级高功率因数前置稳压器 | DW | 16 | -55 to 125
UC2854BMDWREPG4 TI

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 		增强型产品高级高功率因数前置稳压器 | DW | 16 | -55 to 125
UC2854BN ROCHESTER

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 		1.5 A POWER FACTOR CONTROLLER, 200 kHz SWITCHING FREQ-MAX, PDIP16
UC2854BN TI

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 		ADVANCED HIGH-POWER FACTOR PREREGULATOR
UC2854BNG4 TI

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 		ADVANCED HIGH-POWER FACTOR PREREGULATOR

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