TLC59581 Datasheet, PDF (3/28 Pages) Texas Instruments – 48-Channel, 16-Bit ES-PWM LED Driver

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TLC59581, TLC59582
SLVSCZ9A – OCTOBER 2015 – REVISED NOVEMBER 2015
5 Description (continued)
The TLC59581/82 device has one error flag: the LED open detection (LOD), which can be read through a serial
interface port. To resolve this caterpillar issue caused by an open LED, the TLC59581/82 device has an
enhanced circuit for caterpillar canceling, thermal shut down (TSD) and I_REF resistor short protection (ISP), which
ensures a higher system reliability. The TLC59581/82 device also has a power-save mode that sets the total
current consumption to 0.8 mA (typical) when all outputs are off. The TLC59581/82 device is a good solution to
improve display performance of a multiplexing panel for low-grayscale patterns.
6 Pin Configuration and Functions
RTQ Package with Thermal Pad
56-Pin VQFN
(Top View)
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
Thermal
37
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
GND
PIN
NO.
29
ThermalPad
IREF
1
IREFGND
56
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 by 1 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 ⁽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.
(1) The deviation of each output in same color group (OUTR0~15 or OUTG0~15 or OUTB0~15) from the average of same color group
constant current. The deviation is calculated by the formula. (X = R or G or B, n = 0~15)
é
ù
D (%)
=
ê
ê
ê
(IOUTX0
+
IOUTXn
IOUTX1+ ¼ + IOUTX14
+
IOUTX15)
ú
- 1ú ´ 100
ú
êë
16
úû
spacer
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