Electronic Components Datasheet Search
  New Zealand  ▼
ALLDATASHEET.CO.NZ

X  

Preview PDF HTML

LP8551TLX-A/NOPB.A Datasheet(PDF) 17 Page - Texas Instruments

Part # LP8551TLX-A/NOPB.A
Description  LP8551 High-Efficiency LED Backlight Driver for Notebooks
PDF  46 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LP8551TLX-A/NOPB.A Datasheet(HTML) 17 Page - Texas Instruments

Back Button LP8551TLX-A/NOPB.A Datasheet HTML 13Page - Texas Instruments LP8551TLX-A/NOPB.A Datasheet HTML 14Page - Texas Instruments LP8551TLX-A/NOPB.A Datasheet HTML 15Page - Texas Instruments LP8551TLX-A/NOPB.A Datasheet HTML 16Page - Texas Instruments LP8551TLX-A/NOPB.A Datasheet HTML 17Page - Texas Instruments LP8551TLX-A/NOPB.A Datasheet HTML 18Page - Texas Instruments LP8551TLX-A/NOPB.A Datasheet HTML 19Page - Texas Instruments LP8551TLX-A/NOPB.A Datasheet HTML 20Page - Texas Instruments LP8551TLX-A/NOPB.A Datasheet HTML 21Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 17 / 46 page
background image
OVP
Light
Load
SW
R
R
OCP
Switch
Driver
R
S
R
$
+
-
+
-
Osc/
ramp
gm
-
+
VREF
FB
Boost output
voltage
adjustment
Active Load
Startup
LP8551
www.ti.com
SNVS673E – APRIL 2010 – REVISED SEPTEMBER 2014
Figure 12. Boost Topology with Protection Circuitry
8.3.3.2 Protection
Three different protection schemes are implemented:
1. Overvoltage protection, limits the maximum output voltage.
–
Overvoltage protection limit changes dynamically based on output voltage setting.
–
Keeps the output below breakdown voltage.
–
Prevents boost operation if battery voltage is much higher than desired output.
2. Overcurrent protection, limits the maximum inductor current.
3. Duty cycle limiting.
8.3.3.3 Manual Output Voltage Control
User can control the boost output voltage with <VBOOST[4:0]> EEPROM register bits when adaptive mode is
disabled.
VBOOST[4:0]
VOLTAGE (TYPICAL)
BIN
DEC
VOLTS
00000
0
10
00001
1
11
00010
2
12
00011
3
13
00100
4
14
...
...
...
11101
29
39
11110
30
40
11111
31
40
8.3.3.4 Adaptive Boost Control
Adaptive boost control function adjusts the boost output voltage to the minimum sufficient voltage for proper LED
driver operation. The output with highest VF LED string is detected and boost output voltage adjusted
accordingly. Driver headroom can be adjusted with <DRIVER_HEADR[2:0]> EEPROM bits from approximately
300 mV to 1200 mV. Boost adaptive control voltage step size is 125 mV. Boost adaptive control operates
similarly with and without PSPWM.
Copyright © 2010–2014, Texas Instruments Incorporated
Submit Documentation Feedback
17
Product Folder Links: LP8551



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 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
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