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參數資料
| 型號： | LM2585T-3.3 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SIMPLE SWITCHER 3A Flyback Regulator |
| 中文描述： | 7 A SWITCHING REGULATOR, 125 kHz SWITCHING FREQ-MAX, PZFM5 |
| 封裝： | BENT STAGGERED, TO-220, 5 PIN |
| 文件頁數： | 1/25頁 |
| 文件大小： | 627K |
| 代理商： | LM2585T-3.3 |
LM2585
SIMPLE SWITCHER
3A Flyback Regulator
General Description
The LM2585 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 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, cur-
rent mode control for improved rejection of input voltage and
output load transients and cycle-by-cycle current limiting. An
output voltage tolerance of
±
4%, within specified input volt-
ages 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
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
Ordering Information
Package Type
NSC Package
Drawing
T05D
TS5B
TS5B
Order Number
5-Lead TO-220 Bent, Staggered Leads
5-Lead TO-263
5-Lead TO-263 Tape and Reel
LM2585T-3.3, LM2585T-5.0, LM2585T-12, LM2585T-ADJ
LM2585S-3.3, LM2585S-5.0, LM2585S-12, LM2585S-ADJ
LM2585SX-3.3, LM2585SX-5.0, LM2585SX-12,
LM2585SX-ADJ
SIMPLE SWITCHER and Switchers Made Simple
are registered trademarks of National Semiconductor Corporation.
DS012515-1
March 1998
L
1999 National Semiconductor Corporation
DS012515
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM2585T-5.0 | SIMPLE SWITCHER 3A Flyback Regulator |
| LM2585T-ADJ | SIMPLE SWITCHER 3A Flyback Regulator |
| LM2585S-ADJ | SIMPLE SWITCHER 3A Flyback Regulator |
| LM2585 | Octal D-type Edge-Triggered Flip-Flops With 3-State Outputs 20-PDIP -40 to 85 |
| LM2586SX-5.0 | SIMPLE SWITCHER 3A Flyback Regulator with Shutdown |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2585T-5.0 | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2585T-5.0/NOPB | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2585T-5.0/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
| LM2585T50 | 制造商:Texas Instruments 功能描述:SWITCHING REG 3A 5.0V 2585 TO-220 |
| LM2585T50 | 制造商:Texas Instruments 功能描述:SWITCHING REG 3A 5.0V 2585 TO-220 |
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