TLC5946_16 Datasheet, PDF (8/41 Pages) Texas Instruments – 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction

TLC5946
SLVS824B – MARCH 2008 – REVISED JUNE 2008 .......................................................................................................................................................... www.ti.com
TERMINAL
NAME PW/PWP RHB
BLANK
2
31
GND
GSCLK
IREF
MODE
NC
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
OUT14
OUT15
SCLK
SIN
SOUT
VCC
XERR
XHALF
1
30
25
24
27
26
6
3
—
12, 13,
28, 29
7
4
8
5
9
6
10
7
11
8
12
9
13
10
14
11
15
14
16
15
17
16
18
17
19
18
20
19
21
20
22
21
4
1
5
2
24
23
28
27
23
22
26
25
XLAT
3
32
TERMINAL FUNCTIONS
I/O
DESCRIPTION
Blank (all constant current outputs off). When BLANK is high, all constant current outputs (OUT0
I
through OUT15) are forced off, the Grayscale PWM timing controller initializes and the Grayscale
counter resets to '0'. When BLANK is low, all constant current outputs are controlled by the
Grayscale PWM timing controller.
— Ground
I Reference clock for Grayscale PWM control.
I/O
This pin sets the constant current value. OUT0 through OUT15 sink constant current is set to
desired value by connecting an external resistor between IREF and GND.
I
Input mode pin. When MODE is high, the input mode is dot correction (DC). When MODE is low,
the input mode is grayscale (GS).
— No connection
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
O Constant current output
I Serial data shift clock
I Serial data input
O Serial data output
I Power-supply voltage
O Error output. Open-drain output. XERR goes low when LOD or TEF is detected.
I
Extended serial interface. When XHALF is high, the device operates normally. When XHALF is
low, the extended serial interface is activated.
Edge triggered latch signal. At the rising edge of XLAT, the TLC5946 writes data from the input
I shift register to either the Dot Correction register (MODE = high) or the Grayscale register
(MODE = low).
8
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