TLC5954 Datasheet, PDF (25/45 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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SIN ^L
L
TLC5954
SBVS241 – APRIL 2014
SCLK
LAT
12
49
H
BLANK
L
12
49
12
49
1
When the device resumes normal mode, BLANK should be low after
the setup time (for at least t _su2) from the SCLK rising edge input time
for stable output current.
48-Bit Common
Shift Register
(Internal)
48-Bit Output
On or Off Data
(Internal)
Data Are Not 0
SID = XXXXh
SID = 0000h
SID = XXXXh
SID holder data are loaded to the shift register at the LAT rising edge.
All Data Are 0
Data Are Not 0
Data Are Not 0
SOUT
L
L
OUTXn
ON or OFF
all OFF
ON or OFF
ON or OFF
SIDLD Bit in
FC Data Latch 01b
(Internal)
48-Bit LOD
Circuit Output Data
(Internal)
SID Holder Data
(Internal)
LOD = XXXXh
48-bit LOD data are not stable
for 1 µs after BLANK goes low.
LOD = XXXXh
LOD data are all0 because all outputs are off.
LOD = 0000h
LOD = XXXXh
LOD = 0000h
LOD = XXXXh
LOD = XXXXh
LOD = 0000h
LOD = XXXXh
PSMODE Bit in
FC Data Latch ^01b
(Internal)
Power-Save
Mode Status
Normal Mode
Power-Save
Mode
Normal
Mode
Normal Mode
ICC
(VCC Current)
more than 1mA
7 µA (typ)
Figure 32. Power-Save Mode (FC Data PSMODE Bits = 01b)
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