TLC5954 Datasheet, PDF (6/45 Pages) Texas Instruments – TLC5954 48-Channel, Constant-Current LED Driver with Global Brightness Control, LED Open-Short Detection, and Power-Save Mode

TLC5954
SBVS241 – APRIL 2014
www.ti.com
6.4 Thermal Information
THERMAL METRIC⁽¹⁾
TLC5954
RTQ (VQFN)
UNIT
56 PINS
R_θJA
R_θJCtop
R_θJB
ψ_JT
ψ_JB
R_θJCbot
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
Junction-to-case (bottom) thermal resistance
29.1
16.3
7.7
°C/W
0.3
7.7
2.8
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
6.5 Electrical Characteristics
At T_A = –40°C to +85°C and V_CC = 3.0 V to 3.6 V, unless otherwise noted. Typical values are at T_A = +25°C and V_CC = 3.3 V.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_OH
V_OL
V_LOD0
V_LOD1
V_LOD2
V_LOD3
V_LOD4
V_LSD0
V_LSD1
V_LSD2
I_IN
I_CC0
I_CC1
I_CC2
I_CC3
I_CC4
High-level output voltage
Low-level output voltage
I_OH = –2 mA at SOUT
I_OL = 2 mA at SOUT
LODVLT = 000b
V_CC – 0.4
0.15
0.20
V_CC
V
0.4
V
0.25
V
LODVLT = 001b, 101b, 110b, 111b
0.25
0.30
0.35
V
LED open-detection threshold LODVLT = 010b
0.35
0.40
0.45
V
LODVLT = 011b
0.45
0.50
0.55
V
LODVLT = 100b
0.55
0.60
0.65
V
LSDVLT = 00b
0.45 × V_CC 0.50 × V_CC 0.55 × V_CC
V
LED short-detection threshold LSDVLT = 01b
0.65 × V_CC 0.70 × V_CC 0.75 × V_CC
V
LSDVLT = 10b, 11b
0.85 × V_CC 0.90 × V_CC 0.95 × V_CC
V
Input current
V_IN = V_CC or GND at SIN, SCLK, LAT, and BLANK
–1
1
μA
SIN, SCLK, LAT = GND, BLANK = VCC, V_OUTXn = 1 V,
BCX = 7Fh, MC = 0h (I_OUTRn, I_OUTGn = 2.9-mA target,
I_OUTBn = 2.0-mA target)⁽¹⁾
15
19
mA
SIN, SCLK, LAT = GND, BLANK = VCC, V_OUTXn = 1 V,
BCX = 7Fh, MC = 5h (I_OUTRn, I_OUTGn = 17.4-mA target,
I_OUTBn = 12.2-mA target)
17.5
22
mA
Supply current (V_CC)
SIN, SCLK, LAT, BLANK = GND, all OUTXn = on,
V_OUTXn = 1 V, BCX = 7Fh, MC = 5h
17.5
22
mA
SIN, SCLK, LAT, BLANK = GND, all OUTXn = on,
V_OUTXn = 1 V, BCX = 7Fh, MC = 7h (I_OUTRn, I_OUTGn =
34.9-mA target, I_OUTBn = 24.4-mA target)
20.5
25.5
mA
In power-save mode, SIN, SCLK, LAT = GND,
BLANK = VCC
7
60
µA
I_OLC0
I_OLC1
Constant output current
All OUTXn = on, V_OUTXn = V_OUTfix = 1 V, BC = 7Fh,
MC = 7h, at OUTR0 to OUTR15 and OUTG0 to
OUTG15
All OUTXn = on, V_OUTXn = V_OUTfix = 1 V, BC = 7Fh,
MC = 7h, at OUTB0 to OUTB15
32.5
34.9
37.3
mA
22.7
24.4
26.1
mA
I_OLKG
ΔI_OLC0
Output leakage current
Constant-current error
(channel-to-channel) ⁽²⁾
BLANK = VCC, V_OUTXn = V_OUTfix
= 10 V, MC = 7h, at OUTXn
T_J = +25°C
T_J = +85°C
T_J = +125°C
All OUTXn = on, BCX = 7Fh, V_OUTXn = V_OUTfix = 1 V,
MC = 7h, at same color group (OUTXn)
±1%
0.1
µA
0.2
µA
0.5
µA
±3%
(1) X = R, G, and B. n = 0 to 15.
(2) The deviation of each output in the same color group (OUTRn, OUTGn, OUTBn) from the average of the same OUTXn group constant-
current. Deviation is calculated by the formula:
I_OUTXn
-1
D (%) = ^IOUTX0 ^{+ I}OUTX1 ^{+ ... + I}OUTX14 ^{+ I}OUTX15
´ 100
16
, where X = R, G, or B, and n = 0 to 15.
6
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