TLC5947 Datasheet, PDF (10/25 Pages) Texas Instruments – 24-Channel, 12-Bit PWM LED Driver with

TLC5947
SBVS114 – JULY 2008....................................................................................................................................................................................................... www.ti.com
SIN
GS0
0A
GS23 GS23 GS23 GS23 GS23
11B 10B 9B 8B 7B
T_SU0
T_H0
f_SCLK
SCLK
123 45
XLAT
BLANK
GS0 GS0 GS0
3B 2B 1B
T_WH0
GS0
0B
T_H1
GS23 GS23 GS23 GS23 GS23 GS23 GS23
11C 10C 9C 8C 7C 6C 5C
T_SU1
285 286 287 288
T_WH1
1234567
T_WL0
T_SU2
T_WH1
Grayscale
Latch Data
(Internal)
Counter
4094 4096
Oscillator
Value
¼
4093
4095
1 2 3 4^¼
Clock
(Internal)
SOUT
OUT0/4/8/
12/16/20⁽¹⁾
t_D0
GS23 GS23 GS23 GS23 GS23
11A 10A 9A 8A 7A
OFF
t_R0/t_F0
ON
OUT1/5/9/
13/17/21⁽¹⁾
OFF
ON
OUT2/6/10/
14/18/22⁽¹⁾
OFF
ON
OUT3/7/11/
15/19/23⁽¹⁾
OFF
ON
t_D1
Previous Grayscale Data
Latest Grayscale Data
fOSC
¼
0
0
0
0
1
2
3
4
5
0
0
0
0
0
1
2^¼
GS0 GS0 GS0 GS0 GS23
3A 2A 1A 0A 11B
GS23 GS23 GS23 GS23 GS23 GS23
10B 9B 8B 7B 6B 5B
t_R1
t_F1
t_D2
t_D3
t_D4
(1) GS data = FFFh.
Figure 9. Grayscale Data Write and OUTn Operation Timing
10
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