TLC5954 Datasheet, PDF (26/45 Pages) Texas Instruments – TLC5954 48-Channel, Constant-Current LED Driver with Global Brightness Control, LED Open-Short Detection, and Power-Save Mode

TLC5954
SBVS241 – APRIL 2014
SIN ^L
L
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SCLK
LAT
BLANK
48-Bit Common
Shift Register
(Internal)
48-Bit Output
On or Off Data
(Internal)
SOUT
12
49
H
L
12
49
12
49
1
When the device resumes normal mode, BLANK should be low
after the setup time for at least t _su3 from the SCLK rising edge
input time for stable output current.
Data Are Not 0
SID = XXXXh
SID = 0000h
SID holder data are loaded to the shift register at the LAT rising edge.
All Data = 0
Data Are Not 0
SID = XXXXh
Data Are Not 0
L
L
OUTXn
ON or OFF
All OFF
ON or OFF
SIDLD Bit in
FC Data Latch
(Internal)
48-Bit LOD
Circuit Output Data
(Internal)
SID Holder Data
(Internal)
01b
LOD = XXXXh
48-bit LOD data are not stable
for 1 ms after BLANK goes low.
LOD = XXXXh
PSMODE Bit in
FC Data Latch 10b
(Internal)
Power-Save
Mode Status
Normal Mode
LOD data are all 0 because all
outputs are off.
LOD = 0000h
LOD = 0000h
Power-Save Mode
LOD =
XXXXh
LOD =
XXXXh
Normal Mode
ICC (VCC Current)
More than 1 mA
7 µA (typ)
Figure 33. Power-Save Mode (FC Data PSMODE Bits = 10b)
ON
or OFF
LOD = XXXXh
LOD = 0000h
LOD = XXXXh
26
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