TLC59282_15 Datasheet, PDF (13/24 Pages) Texas Instruments – 16-Channel, Constant-Current LED Driver with 4-Channel Grouped Delay

TLC59282
www.ti.com
SBVS152C – DECEMBER 2010 – REVISED OCTOBER 2011
REGISTER CONFIGURATION
The TLC59282 has a 16-bit shift register and an output on/off data latch. Both the shift register and data latch
are 16 bits long and are used to turn the constant-current outputs on and off. Figure 16 shows the shift register
and data latch configuration. The data at the SIN pin are shifted in to the LSB of the 16-bit shift register at the
rising edge of the SCLK pin; SOUT data change at the rising edge of SCLK.
The output on/off data in the 16-bit shift register continue to transfer to the output on/off data latch while LAT is
high. Therefore, if the data in the 16-bit shift register are changed when LAT is high, the data in the data latch
are also changed. The data in the data latch are held when LAT is low. When the IC initially powers on, the data
in the output on/off shift register and latch are not set to the default values; on/off control data must be written to
the on/off control data latch before turning the constant-current output on. BLANK should be high when the IC is
powered on because the constant-current may be turned on at that time as a result of random values in the
on/off data latch. All constant-current outputs are forced off when BLANK is high. The OUTn on/off are controlled
by the data in the output on/off data latch. The timing diagram and truth table for writing data are shown in
Figure 17 and Table 3.
16-Bit Shift Register (1 Bit ´ 16 Channels)
MSB
15
14
13
12
11
SOUT
On/Off Data On/Off Data On/Off Data On/Off Data
for
for
for
for
¼
OUT15
OUT14
OUT13
OUT12
LSB
4
3
2
1
0
On/Off Data On/Off Data
for
for
OUT3
OUT2
On/Off Data On/Off Data
for
for
OUT1
OUT0
SIN
SCLK
¼
MSB
15
14
13
12
11
On/Off Data On/Off Data On/Off Data On/Off Data
for
for
for
for
OUT15
OUT14
OUT13
OUT12
¼
LSB
4
3
2
1
0
On/Off Data On/Off Data
for
for
OUT3
OUT2
On/Off Data On/Off Data
for
for
OUT1
OUT0
LAT
Output On/Off Data Latch (1 Bit ´ 16 Channels)
16 Bits
To Constant-Current Driver Control Block
Figure 16. 16-Bit Shift Register and Output On/Off Data Latch Configuration
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