TLC59291_15 Datasheet, PDF (7/45 Pages) Texas Instruments – TLC59291 8/16-Channel, Constant Current LED Driver with 7-bit Brightness Control Low Quiescent Current and Full Self Diagnosis for LED Lamp

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TLC59291
SLVSA96 – SEPTEMBER 2015
Electrical Characteristics (continued)
At V_CC = 3 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.
TLC5929
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
ΔI_OLC1
Constant-current error
(device-to-device, OUT0 to
OUT15) ⁽³⁾
All OUTn = on, V_OUTn = V_OUTfix = 0.8 V, BC = 7Fh,
R_IREF = 1.6 kΩ, T_A = 25°C
±2%
±4%
ΔI_OLC2
ΔI_OLC3
T_TEF
T_HYS
T_PTW
Line regulation⁽⁴⁾
Load regulation⁽⁵⁾
Thermal error flag threshold
Thermal error flag hysteresis
Pre-thermal warning threshold
All OUTn = on, V_OUTn = V_OUTfix = 0.8 V, BC = 7Fh,
R_IREF = 1.6 kΩ
All OUTn = on, V_OUTn = 0.8 V to 3 V, V_OUTfix = 0.8 V,
BC = 7Fh, R_IREF = 1.6 kΩ
Junction temperature⁽¹⁾
Junction temperature⁽¹⁾
Junction temperature⁽¹⁾
±0.1
±1
±0.5
±3
150
165
180
5
10
20
125
138
150
UNIT
%/V
%/V
°C
°C
°C
(3) The deviation of the OUT0 to OUT15 constant-current average from the ideal constant-current value. Deviation is calculated by the
formula:
( ) ^éé
êê
I_OLC(0)+ I_OLC(1)+...+ I_OLC(14)+ I_OLC(15)
ù
ú
ù
ú
D
(%) = 100 x
ê
ê
êë
ê
ê
16
Ideal Output Current
úû
-
(Ideal
Output
ú
Current)^úú
ú
ê
ú
ë
û
Ideal
current
is
calculated
by
the
formula:
I_{O(LC _ IDEAL)}
=
54
x
æ
ç
1.20
è ^RIREF
ö
÷
ø
(4)
Line regulation is calculated by the formula:
( ₍ ) ( ₎ ) _{D (%) = 100 x}
é
ê
êë
I_OLC(n) at V_CC = 5.5 V
2.5 x I_OLC(n)
-
at
I_OLC(n) at V_CC = 3 V
V_CC = 3 V
ù
ú
úû
(5)
Load regulation is calculated by the equation:
( ₍ ) ( ₎ ) _{D (%) = 100 x}
æ
ç
çè
I_OLC(n) at V_OUTn = 3 V - I_OLC(n) at V_OUTn = 1 V
2 x I_OLC(n) at V_OUTn = 1 V
ö
÷
÷ø
6.6 Switching Characteristics
At V_CC = 3 V to 5.5 V, T_A = –40°C to 85°C, C_L = 15 pF, R_L = 82 Ω, R_IREF = 1.3 kΩ, and V_LED = 5 V.
Typical values at V_CC = 3.3 V and T_A = 25°C, unless otherwise noted.
TLC5929
PARAMETER
TEST CONDITIONS
MIN
TYP
t_R0
Rise time
At SOUT
10
t_R1
At OUTn, BC = 7Fh
40
t_F0
Fall time
At SOUT
10
t_F1
At OUTn, BC = 7Fh
40
t_D0
SCLK↑ to SOUT↑↓
8
t_D1
LAT↑ or BLANK↑↓ to OUT0 sink current on/off,
BC = 7Fh
35
t_D2
Propagation delay
OUTn on/off to OUTn + 1 on/off, BC = 7Fh
2
t_D3
LAT↑ to power-save mode by data writing for all output
off
t_D4
SCLK↑ to normal mode operation
t_D5
BLANK↑↓ to SOUT↑↓ when BLANK MODE=0
t_{ON_ERR} Output on-time error⁽¹⁾
Output on/off data = all '1',
BLANK low pulse = 40 ns, BC = 7Fh
–30
f_OSC
Internal oscillator
frequency
12
20
MAX
15
60
15
60
22
65
6
400
100
100
20
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
µs
ns
ns
28 MHz
(1) Output on-time error (t_{ON_ERR}) is calculated by the formula: t_{ON_ERR} (ns) = t_{OUT_ON} – 40 ns. t_OUTON is the actual on-time of OUTn.
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