TLC5954 Datasheet, PDF (13/45 Pages) Texas Instruments – TLC5954 48-Channel, Constant-Current LED Driver with Global Brightness Control, LED Open-Short Detection, and Power-Save Mode

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TLC5954
SBVS241 – APRIL 2014
Timing Diagrams (continued)
Output on or off data write.
SIN
ON
R0A
t_SU0
L
ON ON ON ON ON ON ON ON
B15B G15B R15B B14B G14B R14B B0B G0B
t_H0
f_CLK(SCLK)
t_WH0
ON
R0B
t_SU1
FC, BC, MC data write.
H
H
L
L
H
MC MC MC
2
1
0
SCLK
LAT
BLANK
1
23
4
5
6
t_WL0
t_WL2
t_WH2
Common Shift Register Bit 0 _SID
(Internal) R0A
L
ON ON ON ON ON
B15B G15B R15B B14B G14B
Common Shift Register Bit 1 _SID
(Internal) G0A
SID
R0A
L
ON ON ON ON
B15B G15B R15B B14B
47 48 49
t_H1
1
t_WH1
23
4
47 48 49
ON ON ON
B0B G0B R0B
SID are not loaded into the common
shift register at the LAT signal rising
time for BC, FC data writes.
SID are loaded into the common
shift register at the LAT signal
rising time for on or off data writes.
SID
R0B
H
H
L
L
MC MC
MC
2
1
0
ON ON ON
R1B B0B G0B
SID
G0B
SID
R0B
H
H
L
BC MC
MC
R0
2
1
Common Shift Register Bit 47 SID _{SID SID SID SID SID SID}
(Internal) ^B15A G15A R15A B14A G14A R14A B13A
On or Off Data Latch
(Internal)
Old Data (B15A to R0A = All 1s)
Global BC, FC Data Latch
(Internal)
t_D0
SOUT
L
SID SID SID SID SID SID
B15A G15A R15A B14A G14A R14A
(Common shift register bit48) ^tD2
t_D2
V _OUTXnH
t_F1
t_R1
OFF
OUTR0
V _OUTXnL
ON
t_D3
t_D4
OFF
OUTG0
ON
t_D3
t_D4
OUTB0 ^OFF
ON
t_D3
t_D4
OUTR1 ^OFF
ON
SID SID ON
SID SID SID SID SID
G0A R0A B15B B15B G15B R15B B14B G14B
New Data
(OUTBn, OUTGn = All 1s , OUTRn = All 0s)
Old Data
SID
R0B
H
H
New Data
SID SID
G0A R0A
t_R0, t_F0
L
SID SID SID SID
B15B G15B R15B B14B
t_D1
SID SID
G0B R0B
H
Output current is changed
by BC data changes.
OFF
OUTG7
ON
OUTB7 ^OFF
ON
(1) X = R, G, or B. n = 0 to 15.
Figure 24. Data Write and OUTXn On or Off Timing Diagram
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