SBVS140 – MARCH 2010
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ELECTRICAL CHARACTERISTICS (continued)
At V
CC
= 10 V to 36 V and T
A
= –40°C to +85°C. Typical values at V
CC
= 24 V, FB = 17 V, and T
A
= +25°C, unless otherwise
noted.
TLC5970
PARAMETER
LED DRIVER BLOCK
I
OLC
I
OLKG
ΔI
OLC
Constant output current
At OUT0 to OUT2 pins. OUTn are on,
DCn = BC = 7Fh,
V
OUT
= 1 V, R
IREF
= 1 kΩ
At OUT0 to OUT2 pins. OUTn are off, DCn = 7Fh,
BC = 7Fh, V
OUT
= 17 V, R
IREF
= 1 kΩ
At OUT0 to OUT2 pins. OUTn are on,
DCn = BC = 7Fh,
V
OUT
= 1 V, R
IREF
= 1 kΩ
At OUT0 to OUT2 pins. OUTn are on,
DCn = BC = 7Fh,
V
OUT
= 1 V, R
IREF
= 1 kΩ
OUT0 to OUT2 are on, DCn = BCn = 7Fh,
V
OUT
= 1 V, R
IREF
= 1 kΩ, VREG = 3.3 V to 5.5 V
OUT0 to OUT2 are on, DCn = BCn = 7Fh,
V
OUT
= 1 V to 3 V, R
IREF
= 1 kΩ
IREF0 to IREF2, R
IREF
= 1 kΩ
1.17
±0.5
136
151
166
mA
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Leakage output current
Constant-current error
(channel-to-channel)
(1)
Constant-current error
(device-to-device)
(2)
Line regulation
(3)
Load regulation
(4)
Reference voltage output
0.1
µA
±3
%
ΔI
OLC1
ΔI
OLC2
ΔI
OLC3
V
IREF
±3
±6
%
±0.5
±1
1.20
±2
±2
1.23
%/V
%/V
V
(1)
The deviation of each output from the average of OUT0–OUT2 constant-current. Deviation is calculated by the formula:
D
(%) =
I
OUTn
(I
OUT0
+ I
OUT1
+ I
OUT2
)
3
-
1
´
100
(2)
The deviation of the OUT0–OUT2 constant-current average from the ideal constant-current value.
Deviation is calculated by the following formula:
(I
OUT0
+ I
OUT1
+ I
OUT2
)
D
(%) =
3
-
(Ideal Output Current)
´
100
Ideal Output Current
Ideal current is calculated by the formula:
I
OUT(IDEAL)
= 125
´
1.20
R
IREF
(3)
Line regulation is calculated by this equation:
D
(%/V) =
(I
OUTn
at VREG = 5.5 V)
-
(I
OUTn
at VREG = 3 V)
(I
OUTn
at VREG = 3.0 V)
´
5.5 V
-
3 V
100
(4)
Load regulation is calculated by the equation:
D
(%/V) =
(I
OUTn
at V
OUTn
= 3 V)
-
(I
OUTn
at V
OUTn
= 1 V)
´
100
3V
-
1V
(I
OUTn
at V
OUTn
= 1 V)
6
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