TLC59284 Datasheet, PDF (6/23 Pages) Texas Instruments – 16-Channel, Constant-Current LED Driver with Switching Delay

TLC59284
SBVS208A – OCTOBER 2012 – REVISED OCTOBER 2012
www.ti.com
PIN
NAME NUMBER
BLANK
21
GND
1
IREF
23
LAT
4
OUT0
5
OUT1
6
OUT2
7
OUT3
8
OUT4
9
OUT5
10
OUT6
11
OUT7
12
OUT8
13
OUT9
14
OUT10
15
OUT11
16
OUT12
17
OUT13
18
OUT14
19
OUT15
20
SCLK
3
SIN
2
SOUT
22
VCC
24
PIN DESCRIPTIONS
I/O
DESCRIPTION
All outputs empty (blank); Schmitt buffer input. When BLANK is high, all constant-current outputs (OUT0
I to OUT15) are forced off. When BLANK is low, all constant-current outputs are controlled by the data in
the output on or off data latch. This pin is internally pulled up to V_CC with a 500-kΩ (typ) resistor.
— Power ground
I/O
Constant-current value setting, the OUT0 to OUT15 sink constant-current outputs are set to the desired
values by connecting an external resistor between IREF and GND.
Level-triggered latch; Schmitt buffer input. The data in the 16-bit shift register continue to transfer to the
I
output on or 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. This pin is internally pulled down to GND with a 500-kΩ (typ) resistor.
O
Constant-current output. Each output can be tied together with others to increase the constant-current.
Different voltages can be applied to each output.
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
O Constant-current output
I
Serial data shift clock; Schmitt buffer input.
All data in the 16-bit shift register are shifted toward the MSB by a 1-bit SCLK synchronization.
Serial data input for driver on or off control; Schmitt buffer input.
I
When SIN is high, the LSB is set to '1' for only one SCLK input rising edge. If two SCLK rising edges are
input while SIN is high, then the 16-bit shift register LSB and LSB+1 are set to '1'. When SIN is low, the
LSB is set to '0' at the SCLK input rising edge.
O
Serial data output. This output is connected to the 16-bit shift register MSB. SOUT data changes at the
SCLK rising edge.
— Power-supply voltage
6
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