TLC5957 Datasheet, PDF (3/25 Pages) Texas Instruments – TLC5957 48-Channel, 16-Bit ES-PWM LED Driver with Pre-Charge FET, LED OPEN Detection and Caterpillar Cancelling

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6 Pin Configuration and Functions
RTQ
56 PINS
Top View
TLC5957
SLVSCQ4 – OCTOBER 2014
IREF
OUTR14
OUTG14
OUTB14
OUTR15
OUTG15
OUTB15
OUTR0
OUTG0
OUTB0
OUTR1
OUTG1
OUTB1
OUTR2
56 55 54 53 52 51 50 49 48 47 46 45 44 43
1
42
2
41
3
40
4
39
5
38
6
37
Thermal
7
PAD
36
8
(Solder side)
35
(GND terminal)
9
34
10
33
11
32
12
31
13
30
14
29
15 16 17 18 19 20 21 22 23 24 25 26 27 28
SOUT
OUTB9
OUTG9
OUTR9
OUTB8
OUTG8
OUTR8
OUTB7
OUTG7
OUTR7
OUTB6
OUTG6
OUTR6
GCLK
NAME
GCLK
PIN
NO.
29
GND
IREF
ThermalPad
1
IREFGND 56
LAT
27
OUTR0-
R15
OUTG0-
G15
OUTB0-
B15
8, 11, 14, 17, 20,
23, 30, 33, 36,
39, 44, 47, 50,
53, 2, 5
9, 12, 15, 18, 21,
24, 31, 34, 37,
40, 45, 48, 51,
54, 3, 6
10, 13, 16, 19,
22, 25, 32, 35,
38, 41, 46, 49,
52, 55, 4, 7
Pin Functions
I/O
DESCRIPTION
I Grayscale(GS) pulse width modulation (PWM) reference clock control for OUTXn.
Each GCLK rising edge increase the GS counter by1 for PWM control.
— Power ground. The thermal pad must be soldered to GND on PCB.
— Maximum constant-current value setting. The OUTR0 to OUTB15 maximum constant output
current are set to the desired values by connecting an external resistor between IREF and
IREFGND. See Equation 1 for more detail. The external resistor should be placed close to the
device.
— Analog ground. Dedicated ground pin for the external IREF resistor. This pin should be connected
to analog ground trace which is connected to power ground near the common GND point of board.
I The LAT falling edge latches the data from the common shift register into the GS data latch or FC
data latch.
O Constant current output for RED LED. Multiple outputs can be tied together to increase the
constant current capability. Different voltages can be applied to each output. These outputs are
turned on-off by GCLK signal and the data in GS data memory.
O Constant current output for GREEN LED. Multiple outputs can be tied together to increase the
constant current capability. Different voltages can be applied to each output. These outputs are
turned on-off by GCLK signal and the data in GS data memory.
O Constant current output for BLUE LED. Multiple outputs can be tied together to increase the
constant current capability. Different voltages can be applied to each output. These outputs are
turned on-off by GCLK signal and the data in GS data memory.
Copyright © 2014, Texas Instruments Incorporated
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