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LM2586SX-ADJ Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte LM2586SX-ADJ
Spiegazioni elettronici  SIMPLE SWITCHER짰 3A Flyback Regulator with Shutdown
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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LM2586SX-ADJ Scheda tecnica(HTML) 1 Page - Texas Instruments

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LM2586
www.ti.com
SNVS121D – MAY 1996 – REVISED APRIL 2013
LM2586 SIMPLE SWITCHER® 3A Flyback Regulator with Shutdown
Check for Samples: LM2586
1
FEATURES
DESCRIPTION
The LM2586 series of regulators are monolithic
234
Requires Few External Components
integrated circuits specifically designed for flyback,
Family of Standard Inductors and
step-up (boost), and forward converter applications.
Transformers
The device is available in 4 different output voltage
NPN Output Switches 3.0A, Can Stand Off 65V
versions: 3.3V, 5.0V, 12V, and adjustable.
Wide Input Voltage Range: 4V to 40V
Requiring
a
minimum
number
of
external
components, these regulators are cost effective, and
Adjustable Switching Frequency: 100 kHz to
simple to use. Included in the datasheet are typical
200 kHz
circuits of boost and flyback regulators. Also listed
External Shutdown Capability
are selector guides for diodes and capacitors and a
Draws Less Than 60
μA When Shut Down
family of standard inductors and flyback transformers
designed to work with these switching regulators.
Frequency Synchronization
Current-mode Operation for Improved
The power switch is a 3.0A NPN device that can
Transient Response, Line Regulation, and
stand-off 65V. Protecting the power switch are current
Current Limit
and thermal limiting circuits, and an undervoltage
lockout
circuit.
This
IC
contains
an
adjustable
Internal Soft-start Function Reduces In-rush
frequency oscillator that can be programmed up to
Current During Start-up
200 kHz. The oscillator can also be synchronized with
Output Transistor Protected by Current Limit,
other devices, so that multiple devices can operate at
Under Voltage Lockout, and Thermal
the same switching frequency.
Shutdown
Other features include soft start mode to reduce in-
System Output Voltage Tolerance of ±4% Max
rush current during start up, and current mode control
Over Line and Load Conditions
for improved rejection of input voltage and output
load transients and cycle-by-cycle current limiting.
TYPICAL APPLICATIONS
The device also has a shutdown pin, so that it can be
turned off externally. An output voltage tolerance of
Flyback Regulator
±4%, within specified input voltages and output load
Forward Converter
conditions, is ensured for the power supply system.
Multiple-output Regulator
Simple Boost Regulator
1
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.
2
SIMPLE SWITCHER is a registered trademark of Texas Instruments.
3
Switchers Made Simple, Simple Switcher are registered trademarks of dcl_owner.
4
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1996–2013, 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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