TLC5944_16 Datasheet, PDF (4/38 Pages) Texas Instruments – 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET

TLC5944
SBVS112A – JUNE 2008 – REVISED JULY 2009 .............................................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS
At V_CC = 3.0 V to 5.5 V and T_A = –40°C to +85°C. Typical values at V_CC = 3.3 V and T_A = +25°C, unless otherwise noted.
TLC5944
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
V_OH
High-level output voltage
V_OL
Low-level output voltage
I_IN
Input current
I_OH = –1 mA at SOUT
I_OL = 1 mA at SOUT
I_OL = 5 mA at XERR
V_IN = V_CC or GND at SIN, SCLK, XLAT, GSCLK,
BLANK, DCSEL
V_CC – 0.4
0
0
–1
V_CC
V
0.4
V
0.4
V
1
µA
I_CC1
I_CC2
I_CC3
Supply current (V_CC)
I_CC4
I_O(LC)
Constant output current
I_O(LKG)
I_O(LKG1)
I_O(LKG2)
ΔI_O(LC)
ΔI_O(LC1)
ΔI_O(LC2)
Leakage output current
Constant current error
(channel-to-channel) ⁽¹⁾
Constant current error
(device-to-device) ⁽²⁾
Line regulation⁽³⁾
SIN/SCLK/GSCLK/XLAT/DCSEL = low, BLANK = high,
DCn = 3Fh, V_OUTn = 1 V, R_IREF = 24 kΩ
SIN/SCLK/GSCLK/XLAT/DCSEL = low, BLANK = high,
DCn = 3Fh, V_OUTn = 1 V, R_IREF = 1.6 kΩ
SCLK = 30 MHz, GSCLK = 33 MHz, SIN = 15 MHz,
XLAT/DCSEL = low,
BLANK = low during 4095 GSCLK period and high
during 1 GSCLK period,
GSn = FFFh, DCn = 3Fh, V_OUTn = 1 V,
R_IREF = 1.6 kΩ
SCLK = 30 MHz, GSCLK = 33 MHz, SIN = 15 MHz,
XLAT/DCSEL = low,
BLANK = low during 4095 GSCLK period and high
during 1 GSCLK period,
GSn = FFFh, DCn = 3Fh, V_OUTn = 1 V,
R_IREF = 820 Ω
All OUTn = ON, DCn = 3Fh, V_OUTn = V_OUTfix = 1 V,
R_IREF = 1 kΩ (see Figure 9), at OUT0 to OUT15
All OUTn for constant current driver, all output off,
BLANK = high, V_OUTn = V_OUTfix = 15 V, V_UP = 15 V,
R_IREF = 820 Ω (see Figure 10), at OUT0 to OUT15
All OUTn for pre-charge FET, all output off,
BLANK = low, V_OUTn = V_OUTfix = 0 V, V_UP = 15 V,
R_IREF = 820 Ω (see Figure 10), at OUT0 to OUT15
XERR, no error status, V_OUTn = 5.5 V
All OUTn = ON, DCn = 3Fh, V_OUTn = 1 V,
R_IREF = 820 Ω, at OUT0 to OUT15
All OUTn = ON, DCn = 3Fh, V_OUTn = 1 V,
R_IREF = 820 Ω, at OUT0 to OUT15
All OUTn = ON, DCn = 3Fh, V_OUTn = 1 V,
R_IREF = 820 Ω, at OUT0 to OUT15
1
2
mA
5
10
mA
17
35
mA
30
54
60
±1
±3
±0.5
60
mA
66
mA
0.1
µA
–10
µA
1
µA
±3
%
±6
%
±1
%/V
(1) The deviation of each output from the average of OUT0–OUT15 constant current. Deviation is calculated by the formula:
(%) =
D
I_OUTn
(I_OUT0 + I_OUT1 + ... + I_OUT14 + I_OUT15)
1 100
-´
16
.
(2) The deviation of the OUT0–OUT15 constant current average from the ideal constant current value.
Deviation is calculated by the following formula:
(%) =
D
(I_OUT0 + I_OUT1 + ... I_OUT14 + I_OUT15)
(Ideal Output Current)
-
16
Ideal Output Current
100
´
Ideal current is calculated by the formula:
I_OUT(IDEAL) = 40.5 ´
1.20
R_IREF
(3) Line regulation is calculated by this equation:
(I_OUTn at V_CC = 5.5 V) - (I_OUTn at V_CC = 3.0 V)
(%/V) =
D
(I_OUTn at V_CC = 3.0 V)
100
´
5.5 V 3 V
-
4
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