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UC2854BQTR PDF预览

UC2854BQTR

更新时间： 2024-11-01 23:38:55
品牌 Logo 应用领域
德州仪器 - TI 稳压器开关式稳压器或控制器电源电路开关式控制器
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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UC2854BQTR 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：QLCC
包装说明：PLASTIC, LCC-20针数：20
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.65
Is Samacsys：N模拟集成电路 - 其他类型：POWER FACTOR CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：20 V最小输入电压：10 V
标称输入电压：18 VJESD-30 代码：S-PQCC-J20
JESD-609代码：e0长度：8.965 mm
湿度敏感等级：2功能数量：1
端子数量：20最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：1.5 A
封装主体材料：PLASTIC/EPOXY封装代码：QCCJ
封装等效代码：LDCC20,.4SQ封装形状：SQUARE
封装形式：CHIP CARRIER峰值回流温度（摄氏度）：220
认证状态：Not Qualified座面最大高度：4.57 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BOOST最大切换频率：120 kHz
技术：BIPOLAR温度等级：INDUSTRIAL
端子面层：TIN LEAD端子形式：J BEND
端子节距：1.27 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：8.965 mm
Base Number Matches：1

UC2854BQTR 数据手册

 浏览型号UC2854BQTR的Datasheet PDF文件第2页浏览型号UC2854BQTR的Datasheet PDF文件第3页浏览型号UC2854BQTR的Datasheet PDF文件第4页浏览型号UC2854BQTR的Datasheet PDF文件第5页浏览型号UC2854BQTR的Datasheet PDF文件第6页浏览型号UC2854BQTR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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