поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

Preview PDF HTML

LM5017 датащи(PDF) 13 Page - Texas Instruments

Click here to check the latest version.
номер детали LM5017
подробное описание детали  100-V, 600-mA Constant On-Time Synchronous Buck Regulator
PDF  31 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

LM5017 датащи(HTML) 13 Page - Texas Instruments

Back Button LM5017 Datasheet HTML 9Page - Texas Instruments LM5017 Datasheet HTML 10Page - Texas Instruments LM5017 Datasheet HTML 11Page - Texas Instruments LM5017 Datasheet HTML 12Page - Texas Instruments LM5017 Datasheet HTML 13Page - Texas Instruments LM5017 Datasheet HTML 14Page - Texas Instruments LM5017 Datasheet HTML 15Page - Texas Instruments LM5017 Datasheet HTML 16Page - Texas Instruments LM5017 Datasheet HTML 17Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 13 / 31 page
background image
VOUT
RFB2
VCC
RFB1
To FB
D
C1
R2
R1
D1
B
RFB1 x RFB2
RFB1 + RFB2
tS = C1 x (R2 +
)
LM5017
www.ti.com
SNVS783I – JANUARY 2012 – REVISED OCTOBER 2015
To achieve the desired soft-start, the following design guidance is recommended:
(1) R2 is selected so that VFB is higher than 1.225 V for a VCC of 4.5 V, but is lower than 5 V when VCC is 8.55 V.
If an external VCC is used, VFB should not exceed 5 V at maximum VCC.
(2) C1 is selected to achieve the desired start-up time that can be determined from Equation 9.
(9)
(3) R1 is used to maintain the node B voltage at zero after the soft-start is finished. A value larger than the
feedback resistor divider is preferred. Note that the effect of R1 is ignored in the previous equations.
Based on the schematic shown in Figure 13, selecting C1 = 1 uF, R2 = 1 kΩ, R1 = 30 kΩ results in a soft-start
time of about 2 ms.
Figure 12. Soft-Start Circuit
7.4 Device Functional Modes
Table 2. UVLO Modes
UVLO
VCC Regulator
MODE
DESCRIPTION
VCC regulator disabled.
< 0.66 V
Disabled
Shutdown
Switching disabled.
VCC regulator enabled
0.66 V – 1.225 V
Enabled
Standby
Switching disabled.
VCC regulator enabled.
VCC < 4.5 V
Standby
Switching disabled.
> 1.225 V
VCC enabled.
VCC > 4.5 V
Operating
Switching enabled.
Copyright © 2012–2015, Texas Instruments Incorporated
Submit Documentation Feedback
13
Product Folder Links: LM5017



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 28 29 30 31


датащи скачать

Go To PDF Page


ссылки URL



Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   Ссылка на техническое описание    |   обмен ссыками   |   поиск по производителю
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