Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

TLC5926-Q1 Datasheet(PDF) 15 Page - Texas Instruments

Click here to check the latest version.
Part No. TLC5926-Q1
Description  16-CHANNEL CONSTANT-CURRENT LED SINK DRIVERS
Download  27 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo 

TLC5926-Q1 Datasheet(HTML) 15 Page - Texas Instruments

Zoom Inzoom in Zoom Outzoom out
 15 / 27 page
background image
140
120
80
40
0
0
500
1000
1500
2000
2500
3000
3500
4000
R
ext
W
100
TLC5926-Q1
TLC5927-Q1
www.ti.com ......................................................................................................................................................................................... SLVS973 – SEPTEMBER 2009
APPLICATION INFORMATION
Operating Principles
Constant Current
In LED display applications, TLC5926/TLC5927 provides nearly no current variations from channel to channel
and from IC to IC. While IOUT ≤ 50 mA, the maximum current skew between channels is less than ±6% and
between ICs is less than ±6%.
Adjusting Output Current
TLC5926/TLC5927 scales up the reference current, Iref, set by the external resistor Rext to sink a current, Iout, at
each output port. Users can follow the below formulas to calculate the target output current IOUT,target in the
saturation region:
VR-EXT = 1.26 V × VG
Iref = VR-EXT/Rext, if another end of the external resistor Rext is connected to ground.
IOUT,target = Iref × 15 × 3
CM – 1
Where Rext is the resistance of the external resistor connected to the R-EXT terminal, and VR-EXT is the voltage of
R-EXT, which is controlled by the programmable voltage gain (VG), which is defined by the Configuration Code.
The Current Multiplier (CM) determines that the ratio IOUT,target/Iref is 15 or 5. After power on, the default value of
VG is 127/128 = 0.992, and the default value of CM is 1, so that the ratio IOUT,target/Iref = 15. Based on the default
VG and CM.
VR-EXT = 1.26 V × 127/128 = 1.25 V
IOUT,target = (1.25 V/Rext) × 15
Therefore, the default current is approximately 52 mA at 360
Ω and 26 mA at 720 Ω. The default relationship
after power on between IOUT,target and Rext is shown in Figure 11.
Figure 11. Default Relationship Curve Between IOUT,target and Rext
Copyright © 2009, Texas Instruments Incorporated
Submit Documentation Feedback
15
Product Folder Link(s): TLC5926-Q1 TLC5927-Q1


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 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   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