数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

LM2587S-12 数据表(PDF) 10 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM2587S-12
功能描述  SIMPLE SWITCHER짰 5A Flyback Regulator
Download  27 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM2587S-12 数据表(HTML) 10 Page - National Semiconductor (TI)

Back Button LM2587S-12 Datasheet HTML 6Page - National Semiconductor (TI) LM2587S-12 Datasheet HTML 7Page - National Semiconductor (TI) LM2587S-12 Datasheet HTML 8Page - National Semiconductor (TI) LM2587S-12 Datasheet HTML 9Page - National Semiconductor (TI) LM2587S-12 Datasheet HTML 10Page - National Semiconductor (TI) LM2587S-12 Datasheet HTML 11Page - National Semiconductor (TI) LM2587S-12 Datasheet HTML 12Page - National Semiconductor (TI) LM2587S-12 Datasheet HTML 13Page - National Semiconductor (TI) LM2587S-12 Datasheet HTML 14Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 27 page
background image
Flyback Regulator Operation
The LM2587 is ideally suited for use in the flyback regulator
topology. The flyback regulator can produce a single output
voltage, such as the one shown in Figure 4, or multiple
output voltages. In Figure 4, the flyback regulator generates
an output voltage that is inside the range of the input voltage.
This feature is unique to flyback regulators and cannot be
duplicated with buck or boost regulators.
The operation of a flyback regulator is as follows (refer to
Figure 4): when the switch is on, current flows through the
primary winding of the transformer, T1, storing energy in the
magnetic field of the transformer. Note that the primary and
secondary windings are out of phase, so no current flows
through the secondary when current flows through the pri-
mary. When the switch turns off, the magnetic field col-
lapses, reversing the voltage polarity of the primary and
secondary windings. Now rectifier D1 is forward biased and
current flows through it, releasing the energy stored in the
transformer. This produces voltage at the output.
The output voltage is controlled by modulating the peak
switch current. This is done by feeding back a portion of the
output voltage to the error amp, which amplifies the differ-
ence between the feedback voltage and a 1.230V reference.
The error amp output voltage is compared to a ramp voltage
proportional to the switch current (i.e., inductor current dur-
ing the switch on time). The comparator terminates the
switch on time when the two voltages are equal, thereby
controlling the peak switch current to maintain a constant
output voltage.
01231610
As shown in Figure 4, the LM2587 can be used as a flyback regulator by using a minimum number of external components. The switching waveforms of this
regulator are shown in Figure 5. Typical Performance Characteristics observed during the operation of this circuit are shown in Figure 6.
FIGURE 4. 12V Flyback Regulator Design Example
www.national.com
10


类似零件编号 - LM2587S-12

制造商部件名数据表功能描述
logo
National Semiconductor ...
LM2587S-12 NSC-LM2587S-12 Datasheet
676Kb / 26P
   SIMPLE SWITCHER 5A Flyback Regulator
logo
Texas Instruments
LM2587S-12/NOPB TI1-LM2587S-12/NOPB Datasheet
4Mb / 32P
[Old version datasheet]   LM2587 SIMPLE SWITCHER 5A Flyback Regulator
More results

类似说明 - LM2587S-12

制造商部件名数据表功能描述
logo
Texas Instruments
LM2587EVAL TI1-LM2587EVAL Datasheet
4Mb / 32P
[Old version datasheet]   LM2587 SIMPLE SWITCHER짰 5A Flyback Regulator
logo
National Semiconductor ...
LM2588 NSC-LM2588_05 Datasheet
1Mb / 30P
   SIMPLE SWITCHER짰 5A Flyback Regulator with Shutdown
LM2585 NSC-LM2585_07 Datasheet
983Kb / 28P
   SIMPLE SWITCHER짰 3A Flyback Regulator
logo
Texas Instruments
LM2585 TI-LM2585_15 Datasheet
3Mb / 32P
[Old version datasheet]   LM2585 SIMPLE SWITCHER짰 3A Flyback Regulator
logo
National Semiconductor ...
LM2587 NSC-LM2587 Datasheet
676Kb / 26P
   SIMPLE SWITCHER 5A Flyback Regulator
logo
Texas Instruments
LM2586 TI1-LM2586_13 Datasheet
2Mb / 38P
[Old version datasheet]   SIMPLE SWITCHER짰 3A Flyback Regulator with Shutdown
logo
National Semiconductor ...
LM2586 NSC-LM2586_05 Datasheet
1Mb / 30P
   SIMPLE SWITCHER짰 3A Flyback Regulator with Shutdown
LM2588 NSC-LM2588 Datasheet
786Kb / 29P
   SIMPLE SWITCHER 5A Flyback Regulator with
logo
Texas Instruments
LM2587T-ADJ TI1-LM2587T-ADJ Datasheet
4Mb / 32P
[Old version datasheet]   LM2587 SIMPLE SWITCHER 5A Flyback Regulator
LM2588 TI1-LM2588 Datasheet
2Mb / 38P
[Old version datasheet]   SIMPLE SWITCHER 5A Flyback Regulator with Shutdown
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com