Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

TLC5957 Datasheet(PDF) 14 Page - Texas Instruments

Click here to check the latest version.
Part No. TLC5957
Description  TLC5957 48-Channel, 16-Bit ES-PWM LED Driver with Pre-Charge FET, LED OPEN Detection and Caterpillar Cancelling
Download  25 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

TLC5957 Datasheet(HTML) 14 Page - Texas Instruments

Back Button TLC5957 Datasheet HTML 10Page - Texas Instruments TLC5957 Datasheet HTML 11Page - Texas Instruments TLC5957 Datasheet HTML 12Page - Texas Instruments TLC5957 Datasheet HTML 13Page - Texas Instruments TLC5957 Datasheet HTML 14Page - Texas Instruments TLC5957 Datasheet HTML 15Page - Texas Instruments TLC5957 Datasheet HTML 16Page - Texas Instruments TLC5957 Datasheet HTML 17Page - Texas Instruments TLC5957 Datasheet HTML 18Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 14 / 25 page
background image
TLC5957
SLVSCQ4 – OCTOBER 2014
www.ti.com
Device Functional Modes (continued)
Table 1. CC Data vs Current Ratio and Set Current Value
RATIO OF OUTPUT
CC DATA (CCR or CCG or CCB)
CURRENT
OUTPUT CURRENT (mA, RIREF = 7.41 kΩ)
TO IolcMax(%, typical)
BC = 7h
BC = 0h
BINARY
DECIMAL
HEX
(IolcMax =25mA)
(IolcMax=3.2mA)
0 0000 0000
0
00
0
0
0
0 0000 0001
1
01
0.2
0.05
0.006
0 0000 0010
2
02
0.4
0.10
0.013
1 0000 0000
256
100
50.1
12.52
1.621
(Default)
(Default)
(Default)
1 1111 1101
509
1FD
99.6
24.90
3.222
1 1111 1110
510
1FE
99.8
24.95
3.229
1 1111 1111
511
1FF
100.0
25
3.235
9.3.3 Select RIREF For a Given BC
The maximum output current per channel, IOLCMax is determined by resistor RIREF placed between the IREF and
IREFGND pins, and the BC code in FC register. The voltage on IREF is typically 1.209V. RIREF can be calculated
by Equation 2.
Riref(k
Ω) = Viref(V) / IOLCMax(mA) × Gain
(2)
Where:
VIREF = the internal reference voltage on IREF (1.209V, typical)
IOLCMax is the largest current for each output at CCR/G/B=1FFh.
Gain = the current gain at a selected BC code (See Table 2 )
Table 2. Current Gain Versus BC Code
BC DATA
RATIO OF
GAIN
GAIN / GAIN_MAX (AT MAX BC)
BINARY
HEX
000 (recommend)
0 (recommend)
20.0
12.9%
001
1
39.5
25.6%
010
2
58.6
37.9%
011
3
80.9
52.4%
100 (default)
4 (default)
100.0
64.7%
101
5
113.3
73.3%
110
6
141.6
91.7%
111
7
154.5
100%
NOTE: Recommend to use smaller BC code for better performance. For noise immunity purposes, suggest RIREF < 60 kΩ.
9.3.4 Choosing BC/CC For a Different Application
BC is mainly used for global brightness adjustment between day and night. Suggested BC is 4h, which is in the
middle of the range; thus, one can change brightness up and down flexibly.
CC can be used to fine tune the brightness in 512 steps, this is suitable for white balance adjustment between
RGB color groups. To get a pure white color, the general requirement for the luminous intensity ratio of R, G, B
LED is 3:6:1. Depending on LED’s characteristics (Electro-Optical conversion efficiency), the current ratio of R,
G, B LED will be much different from this ratio. Usually, the Red LED will need the largest current. One can
choose 511d(the max value) CC code for the color group which needs the largest current at first, then choose
proper CC code for the other two color groups according to the current ratio requirement of the LED used.
14
Submit Documentation Feedback
Copyright © 2014, Texas Instruments Incorporated


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 


Datasheet Download

Go To PDF Page


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