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參數(shù)資料
| 型號： | LM2586 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs 20-PDIP -40 to 85 |
| 中文描述： | 第3A激的SIMPLE SWITCHER穩(wěn)壓器，帶有關(guān)斷 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大小： | 778K |
| 代理商： | LM2586 |
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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 |
|---|---|
| LM2587SX-5.0 | SIMPLE SWITCHER 5A Flyback Regulator |
| LM2587T-ADJ | SIMPLE SWITCHER 5A Flyback Regulator |
| LM2587T-12 | SIMPLE SWITCHER 5A Flyback Regulator |
| LM2587T-3.3 | SIMPLE SWITCHER 5A Flyback Regulator |
| LM2587T-5.0 | SIMPLE SWITCHER 5A Flyback Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2586S-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 |
| LM2586S-12/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 |
| LM2586S-3.3 | 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 |
| LM2586S-3.3/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 |
| LM2586S-5.0 | 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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