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UC1846-EP PDF预览

UC1846-EP

更新时间： 2024-11-23 12:22:31
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
15页 338K
描述
CURRENT-MODE PWM CONTROLLER

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UC1846-EP 数据手册

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UC1846-EP  
CURRENT-MODE PWM CONTROLLER  
www.ti.com  
SGLS329–MAY 2006  
FEATURES  
•
Controlled Baseline  
•
•
•
Soft-Start Capability  
Shutdown Terminal  
500-kHz Operation  
– One Assembly/Test Site, One Fabrication  
Site  
•
•
Extended Temperature Performance of –55°C  
to 125°C  
DW PACKAGE  
(TOP VIEW)  
Enhanced Diminishing Manufacturing  
Sources (DMS) Support  
C/S SS  
VREF  
C/S–  
Shutdown  
•
•
•
•
Enhanced Product-Change Notification  
V
IN  
(1)  
Qualification Pedigree  
B Out  
Automatic Feed-Forward Compensation  
V
C
C/S+  
Programmable Pulse-by-Pulse Current  
Limiting  
GND  
A Out  
Sync  
E/A+  
E/A–  
•
Automatic Symmetry Correction in Push-Pull  
Configuration  
COMP  
•
•
Enhanced Load-Response Characteristics  
Parallel Operation Capability for Modular  
Power Systems  
C
T
R
T
•
Differential Current-Sense Amplifier With  
Wide Common-Mode Range  
•
•
•
•
Double Pulse Suppression  
500-mA (Peak) Totem-Pole Outputs  
±1% Bandgap Reference  
Undervoltage Lockout  
(1) Component qualification in accordance with JEDEC and  
industry standards to ensure reliable operation over an  
extended temperature range. This includes, but is not limited  
to, Highly Accelerated Stress Test (HAST) or biased 85/85,  
temperature cycle, autoclave or unbiased HAST,  
electromigration, bond intermetallic life, and mold compound  
life. Such qualification testing should not be viewed as  
justifying use of this component beyond specified  
performance and environmental limits.  
DESCRIPTION/ORDERING INFORMATION  
The UC1846-EP control IC provides all of the necessary features to implement fixed-frequency, current-mode  
control schemes, while maintaining a minimum external parts count. The superior performance of this technique  
can be measured in improved line regulation, enhanced load-response characteristics, and a simpler,  
easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current-limiting capability,  
automatic symmetry correction for push-pull converters, and the ability to parallel power modules, while  
maintaining equal current sharing.  
Protection circuitry includes built-in undervoltage lockout and programmable current limit, in addition to soft-start  
capability. A shutdown function is also available, which can initiate either a complete shutdown with automatic  
restart or latch the supply off.  
Other features include fully latched operation, double pulse suppression, deadline adjust capability, and a ±1%  
trimmed bandgap reference.  
The UC1846-EP features low outputs in the OFF state.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2006, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
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