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LM2587T-12 датащи(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали LM2587T-12
подробное описание детали  SIMPLE SWITCHER짰 5A Flyback Regulator
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2587T-12 датащи(HTML) 1 Page - National Semiconductor (TI)

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LM2587
SIMPLE SWITCHER® 5A Flyback Regulator
General Description
The LM2587 series of regulators are monolithic integrated
circuits specifically designed for flyback, step-up (boost), and
forward converter applications. The device is available in 4
different output voltage versions: 3.3V, 5.0V, 12V, and ad-
justable.
Requiring a minimum number of external components, these
regulators are cost effective, and simple to use. Included in
the datasheet are typical circuits of boost and flyback regu-
lators. Also listed are selector guides for diodes and capaci-
tors and a family of standard inductors and flyback trans-
formers designed to work with these switching regulators.
The power switch is a 5.0A NPN device that can stand-off
65V. Protecting the power switch are current and thermal
limiting circuits, and an undervoltage lockout circuit. This IC
contains a 100 kHz fixed-frequency internal oscillator that
permits the use of small magnetics. Other features include
soft start mode to reduce in-rush current during start up,
current mode control for improved rejection of input voltage
and output load transients and cycle-by-cycle current limit-
ing. An output voltage tolerance of ±4%, within specified
input voltages and output load conditions, is guaranteed for
the power supply system.
Features
n
Requires few external components
n
Family of standard inductors and transformers
n
NPN output switches 5.0A, can stand off 65V
n
Wide input voltage range: 4V to 40V
n
Current-mode operation for improved transient
response, line regulation, and current limit
n
100 kHz switching frequency
n
Internal soft-start function reduces in-rush current during
start-up
n
Output transistor protected by current limit, under
voltage lockout, and thermal shutdown
n
System Output Voltage Tolerance of ±4% max over line
and load conditions
Typical Applications
n
Flyback regulator
n
Multiple-output regulator
n
Simple boost regulator
n
Forward converter
Flyback Regulator
01231601
Ordering Information
Package Type
NSC Package
Order Number
Drawing
5-Lead TO-220 Bent, Staggered Leads
T05D
LM2587T-3.3, LM2587T-5.0, LM2587T-12, LM2587T-ADJ
5-Lead TO-263
TS5B
LM2587S-3.3, LM2587S-5.0, LM2587S-12, LM2587S-ADJ
5-Lead TO-263 Tape and Reel
TS5B
LM2587SX-3.3, LM2587SX-5.0, LM2587SX-12,
LM2587SX-ADJ
SIMPLE SWITCHER® and Switchers Made Simple® are registered trademarks of National Semiconductor Corporation.
February 2004
© 2004 National Semiconductor Corporation
DS012316
www.national.com


Аналогичный номер детали - LM2587T-12

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Аналогичное описание - LM2587T-12

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