TLC5971_15 Datasheet, PDF (6/45 Pages) Texas Instruments – 12-Channel, 16-Bit, Enhanced Spectrum, PWM, RGB, LED Driver

TLC5971
SBVS146D – AUGUST 2010 – REVISED DECEMBER 2015
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Electrical Characteristics (continued)
At T_A = –40°C to +85°C, V_CC = 6 V to 17 V or VCC = VREG = 3 V to 5.5 V, VLED = 5 V, and C_VREG = 1 µF, unless otherwise
noted. Typical values are at T_A = 25°C and VCC = 12 V.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ΔI_OLC
Constant-current error⁽¹⁾
(channel-to-channel in same color group),
OUTXn
All OUTXn on, BCX = 7Fh, V_OUTXn = V_OUTfix = 1 V,
R_IREF = 0.82 kΩ (I_OLCMax = 60 mA)
–3%
±1%
3%
ΔI_OLC1
Constant current error⁽²⁾
(device-to-device in same color group),
OUTXn
All OUTXn on, BCX = 7Fh, V_OUTXn = V_OUTfix = 1V,
R_IREF = 0.82 kΩ (I_OLCMax = 60 mA), at same grouped color output
of OUTR0-3, OUTG0-3, and OUTB0-3
–4%
±1
4%
ΔI_OLC2
Line regulation of constant-current output,
OUTXn ⁽³⁾
All OUTn on, BCX = 7Fh, V_OUTXn = V_OUTfix = 1 V,
R_IREF = 0.82 kΩ (I_OLCMax = 60 mA)
–1
±0.5
1
%/V
(1)
The deviation of each output in the same color group (OUTR0-OUTR3 or OUTG0-OUTG3 or OUTB0-OUTB3)
from the average current from the same color group. Deviation is calculated by Equation 1:
D (%) =
I_OLCXn
- 1 ´ 100
(I_OLCX0 + I_OLCX1 + I_OLCX2 + I_OLCX3)
4
where
(a) X = R/G/B,
(b) n = 0-3.
(1)
(2)
The deviation of each color group constant-current average from the ideal constant-current value. Deviation is
calculated by Equation 2:
D (%) =
(I_OLCX0 + I_OLCX1 + I_OLCX2 + I_OLCX3)
- (Ideal Output Current)
4
Ideal Output Current
´ 100
where
(a) X = R/G/B.
(2)
Ideal current is calculated by Equation 3 for the OUTRn and OUTGn groups:
1.21
I_OLCXn(IDEAL) (mA) = 41 ´ _{RIREF (W)}
where
(a) X = R/G/B.
(3)
(3)
Line regulation is calculated by Equation 4:
(I_OLCXn at VCC = 5.5 V) - (I_OLCXn at VCC = 3 V)
D (%/V) =
(I_OLCXn at VCC = 3 V)
100
´
5.5 V - 3 V
where
(a) X = R/G/B,
(b) n = 0-3.
(4)
6
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