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UC1846MDWREP датащи(PDF) 1 Page - Texas Instruments

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номер детали UC1846MDWREP
подробное описание детали  CURRENT-MODE PWM CONTROLLER
Download  15 Pages
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

UC1846MDWREP датащи(HTML) 1 Page - Texas Instruments

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FEATURES
DW PACKAGE
(TOP VIEW)
C/S SS
Shutdown
VIN
B Out
VC
GND
A Out
Sync
RT
VREF
C/S–
C/S+
E/A+
E/A–
COMP
CT
DESCRIPTION/ORDERING INFORMATION
UC1846-EP
CURRENT-MODE PWM CONTROLLER
SGLS329 – MAY 2006
Controlled Baseline
Soft-Start Capability
– One Assembly/Test Site, One Fabrication
Shutdown Terminal
Site
500-kHz Operation
Extended Temperature Performance of –55
°C
to 125
°C
Enhanced Diminishing Manufacturing
Sources (DMS) Support
Enhanced Product-Change Notification
Qualification Pedigree (1)
Automatic Feed-Forward Compensation
Programmable Pulse-by-Pulse Current
Limiting
Automatic Symmetry Correction in Push-Pull
Configuration
Enhanced Load-Response Characteristics
Parallel Operation Capability for Modular
Power Systems
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.
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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