поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

Preview PDF HTML

LT1786FCS датащи(PDF) 11 Page - Linear Technology

номер детали LT1786FCS
подробное описание детали  SMBus Programmable CCFL Switching Regulator
PDF  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LT1786FCS датащи(HTML) 11 Page - Linear Technology

Back Button LT1786FCS Datasheet HTML 7Page - Linear Technology LT1786FCS Datasheet HTML 8Page - Linear Technology LT1786FCS Datasheet HTML 9Page - Linear Technology LT1786FCS Datasheet HTML 10Page - Linear Technology LT1786FCS Datasheet HTML 11Page - Linear Technology LT1786FCS Datasheet HTML 12Page - Linear Technology LT1786FCS Datasheet HTML 13Page - Linear Technology LT1786FCS Datasheet HTML 14Page - Linear Technology LT1786FCS Datasheet HTML 15Page - Linear Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 20 page
background image
11
LT1786F
TI I G DIAGRA S
Timing for SMBus Interface
tBUF
tLOW
tHIGH
tr
tf
tHD:STA
tHD:DAT
SDA
SCL
tSU:DAT
tSU:STA
tSU:STO
STOP
1786 TD01
START
START
STOP
tHD:STA
Operating Sequence
SMBus Write Byte Protocol, with SMBus Address = 0101101B,
Command Byte = 0XXXXXXXB and Data Byte = 111111XXB
IOUT
SCL
S = START
P = STOP
* = OPTIONAL
SDA
S
1
0
2
1
3
0
4
1
5
1
6
0
7
1
XX
XX
X
X
X
1
1
1
1
1
1
X
X
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
P
FULL-SCALE
CURRENT
VCC
GND
1786
TD02
ZERO-SCALE
CURRENT
*
SMBUS ADDRESS
COMMAND BYTE
DATA BYTE
ADR
APPLICATIONS INFORMATION
Introduction
Current generation portable computers and instruments
use backlit Liquid Crystal Displays (LCDs). Cold Cathode
Fluorescent Lamps (CCFLs) provide the highest available
efficiency in back lighting the display. Providing the most
light out for the least amount of input power is the most
important goal. These lamps require high voltage AC to
operate, mandating an efficient high voltage DC/AC con-
verter. The lamps operate from DC, but migration effects
damage the lamp and shorten its lifetime. Lamp drive
should contain zero DC component. In addition to good
efficiency, the converter should deliver the lamp drive in
the form of a sine wave. This minimizes EMI and RF
emissions. Such emissions can interfere with other
devices and can also degrade overall operating efficiency.
Sinusoidal CCFL drive maximizes current-to-light conver-
sion in the lamp. The circuit should also permit lamp
intensity control from zero to full brightness with no
hysteresis or “pop-on.”
The small size and battery-powered operation associated
with LCD equipped apparatus dictate low component
count and high efficiency for these circuits. Size con-
straints place severe limitations on circuit architecture and
long battery life is a priority. Laptop and handheld portable
computers offer an excellent example. The CCFL and its
power supply can be responsible for almost 50% of the



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


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