參數(shù)資料
型號(hào)： LM2586T-ADJ
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
中文描述： 3 A SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PZFM7
封裝： BENT STAGGERED, TO-220, 7 PIN
文件頁(yè)數(shù)： 1/28頁(yè)
文件大?。?/td> 778K
代理商： LM2586T-ADJ
LM2586
SIMPLE SWITCHER
3A Flyback Regulator with
Shutdown
General Description
The LM2586 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 adjust-
able.
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 regula-
tors.Also listed are selector guides for diodes and capacitors
and a family of standard inductors and flyback transformers
designed to work with these switching regulators.
The power switch is a 3.0A 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 an adjustable frequency oscillator that can be pro-
grammed up to 200 kHz. The oscillator can also be synchro-
nized with other devices, so that multiple devices can oper-
ate at the same switching frequency.
Other features include soft start mode to reduce in-rush cur-
rent during start up, and current mode control for improved
rejection of input voltage and output load transients and
cycle-by-cycle current limiting. The device also has a shut-
down pin, so that it can be turned off externally. 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 3.0A, can stand off 65V
n
Wide input voltage range: 4V to 40V
n
Adjustable switching frequency: 100 kHz to 200 kHz
n
External shutdown capability
n
Draws less than 60 μA when shut down
n
Frequency synchronization
n
Current-mode operation for improved transient
response, line regulation, and current limit
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
Forward converter
n
Multiple-output regulator
n
Simple boost regulator
Flyback Regulator
SIMPLE SWITCHER
and
Switchers Made Simple
are registered trademarks of National Semiconductor Corporation.
DS012516-1
May 1996
L
1999 National Semiconductor Corporation
DS012516
www.national.com
相關(guān)PDF資料
PDF描述
LM2586T-5.0 SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
LM2586T-3.3 SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
LM2586SX-ADJ SIMPLE SWITCHER 3A Flyback Regulator with Shutdown
LM2586 Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs 20-PDIP -40 to 85
LM2587SX-5.0 SIMPLE SWITCHER 5A Flyback Regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2586T-ADJ/NOPB 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
LM2586T-ADJ/NOPB 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu
LM2587 制造商:Texas Instruments 功能描述:
LM2587EVAL 功能描述:電源管理IC開發(fā)工具 EVAL BOARDFOR LM2587 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
LM2587S-12 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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