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UCC28521DW PDF预览

UCC28521DW

更新时间： 2024-11-22 22:35:47
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功率因数校正光电二极管信息通信管理
页数 文件大小 规格书
32页 553K
描述
ADVANCED PFC/PWW COMBINATION CONTROLLER WITH TRAILING-EDGE/TRAILING-EDGE MODULATION

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UCC28521DW 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SOIC
包装说明：SOP, SOP20,.4针数：20
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：1.61
Is Samacsys：N其他特性：PEAK CURRENT MODE ALSO AVAILABLE
模拟集成电路 - 其他类型：POWER FACTOR CONTROLLER WITH POST REGULATOR控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：15 V
最小输入电压：10.6 V标称输入电压：12 V
JESD-30 代码：R-PDSO-G20JESD-609代码：e4
长度：12.8 mm湿度敏感等级：1
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：3.5 A封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOP20,.4
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：2.35 mm子类别：Switching Regulator or Controllers
最大供电电流 (Isup)：4 mA最大供电电压 (Vsup)：18 V
表面贴装：YES切换器配置：BOOST
最大切换频率：240 kHz技术：BICMOS
温度等级：INDUSTRIAL端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：7.5 mmBase Number Matches：1

UCC28521DW 数据手册

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SLUS608B − JANUARY 2005 REVISED JUNE 2005  
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FEATURES  
DESCRIPTION  
The UCC28521 and UCC28528 combination  
PFC/PWM controllers provide complete control  
functionality for any off-line power system  
requiring compliance with the IEC1000−3−2  
harmonic reduction requirements. By combining  
the control and drive signals for the PFC and the  
PWM stages into a single device, significant  
performance and cost benefits are gained.  
D
D
D
D
D
Provides Control of PFC and PWM Power  
Stages In One Device  
Trailing-Edge PFC, Trailing-Edge PWM  
Modulation  
Built-In Sequencing of PFC and PWM  
Turn-On  
Based on the UCC28511, the new devices employ  
an average current mode control architecture with  
input voltage feedforward. The major difference of  
2-A Source and 3-A Sink Gate Drive for Both  
PFC and PWM Stages  
the UCC28521/28 is the trailing-edge  
/
Typical 16-ns Rise Time and 7-ns Fall Time  
into 1-nF Loads  
trailing-edge (TEM/TEM) modulation scheme for  
the PFC/PWM stages. The UCC28528 differs  
from the UCC28521 as its PWM stage does not  
turn off with the falling bulk voltage. The  
UCC28528 PWM was designed for low power  
auxiliary supplies.  
PFC Features  
− Average-Current-Mode Control for  
Continuous Conduction Mode Operation  
− Highly-Linear Multiplier for Near-Unity  
Power Factor  
− Input Voltage Feedforward Implementation  
− Improved Load Transient Response  
− Accurate Power Limiting  
These devices offer performance advantages  
over earlier generation combination controllers. A  
key PWM feature is programmable maximum duty  
cycle. For the PFC stage, the devices feature an  
improved multiplier and the use of  
a
− Zero Power Detect  
transconductance amplifier for enhanced  
transient response.  
PWM Features  
The core of the PFC section is in a three-input  
multiplier that generates the reference signal for  
the line current. The UCC28521/28 features a  
highly linearized multiplier circuit capable of  
producing a low distortion reference for the line  
current over the full range of line and load  
conditions. A low-offset, high-bandwidth current  
error amplifier ensures that the actual inductor  
current (sensed through a resistor in the return  
path) follows the multiplier output command  
signal. The output voltage error is processed  
through a transconductance voltage amplifier.  
− Peak-Current-Mode Control Operation  
− 1:1 PFC:PWM Frequency Option  
− Programmable maximum Duty Cycle Limit  
Up to 90%  
− Programmable Soft-Start  
APPLICATIONS  
D
D
High-Efficiency Server and DesktopSupplies  
High-Efficiency Telecom AC-DC Converter  
AVAILABLE APPLICATION OPTIONS  
PART NUMBER  
PWM STAGE  
APPLICATION  
UCC28521  
UCC28528  
PWM shuts off at 71% of the nomonal bulk voltage  
PWM does not turn off with falling bulk voltage  
ac−dc and main dc−dc converter  
ac−dc and standby converter  
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Copyright 2005, Texas Instruments Incorporated  
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中文翻译

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UCC28521DW 替代型号

型号 品牌 替代类型 描述 数据表
UCC28521DWRG4 TI

完全替代

 Advanced PWM/PFC Combination Controller with TEM/TEM Modulation 20-SOIC -40 to 85
UCC28521DWR TI

完全替代

 ADVANCED PFC/PWW COMBINATION CONTROLLER WITH TRAILING-EDGE/TRAILING-EDGE MODULATION

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