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TLC5940_15 Datasheet, PDF (4/38 Pages) Texas Instruments – 16-Channel LED Driver
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TLC5940
SLVS515D – DECEMBER 2004 – REVISED NOVEMBER 2015
NAME
DIP NO.
PIN
PWP NO.
BLANK
23
2
RHB NO.
31
DCPRG
19
26
25
GND
22
1
30
GSCLK
18
25
24
IREF
20
27
26
—
—
12
—
—
13
NC
—
—
28
—
—
29
OUT0
28
7
4
OUT1
1
8
5
OUT2
2
9
6
OUT3
3
10
7
OUT4
4
11
8
OUT5
5
12
9
OUT6
6
13
10
OUT7
7
14
11
OUT8
8
15
14
OUT9
9
16
15
OUT10
10
17
16
OUT11
11
18
17
OUT12
12
19
18
OUT13
13
20
19
OUT14
14
21
20
OUT15
15
22
21
SCLK
25
4
1
SIN
26
5
2
SOUT
17
24
23
VCC
21
28
27
VPRG
27
6
3
XERR
16
23
22
XLAT
24
3
32
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Pin Functions
TYPE
DESCRIPTION
Blank all outputs. When BLANK = H, all OUTn outputs are forced OFF.
I
GS counter is also reset. When BLANK = L, OUTn are controlled by
grayscale PWM control.
Switch DC data input. When DCPRG = L, DC is connected to
I
EEPROM. When DCPRG = H, DC is connected to the DC register.
DCPRG also controls EEPROM writing, when VPRG = V(PRG).
EEPROM data = 3 Fh (default)
G Ground
I
Reference clock for grayscale PWM control
I
Reference current terminal
— 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
Multifunction input pin. When VPRG = GND, the device is in GS mode.
I
When VPRG = VCC, the device is in DC mode. When VPRG = V(VPRG),
DC register data can programmed into DC EEPROM with
DCPRG=HIGH. EEPROM data = 3 Fh (default)
O
Error output. XERR is an open-drain terminal. XERR goes L when LOD
or TEF is detected.
Level triggered latch signal. When XLAT = high, the TLC5940 writes
I
data from the input shift register to either GS register (VPRG = low) or
DC register (VPRG = high). When XLAT = low, the data in GS or DC
register is held constant.
4
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