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8-Port, 5.5V Constant-Current LED Driver with
LED Fault Detection and Watchdog
3.3V TIMING CHARACTERISTICS
( Typical Operating Circuit , V+ = 3V to 5.5V, T A = T MIN to T MAX , unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CLK Clock Period
CLK Pulse-Width High
CLK Pulse-Width Low
DIN Setup Time
DIN Hold Time
t CP
t CH
t CL
t DS
t DH
52
24
24
4
8
ns
ns
ns
ns
ns
DOUT Propagation Delay
t DO
12
48
ns
DOUT Rise and Fall Time
LE Pulse-Width High
LE Pulse Width (Fault-Detection
Data Valid)
LE Setup Time
LE Rising to OUT_ Rising Delay
LE Rising to OUT_ Falling Delay
CLK Rising to OUT_ Rising Delay
CLK Rising to OUT_ Falling Delay
OE Rising to OUT_ Rising Delay
OE Falling to OUT_ Falling Delay
t LW
t LW
t LS
t OE H
t OE L
C DOUT = 10pF, 20% to 80%
20
20
15
10
100
310
100
330
100
330
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
LED Output OUT_ Turn-On Fall
Time
LED Output OUT_ Turn-Off Rise
Time
t f
t r
80% to 20%
20% to 80%
200
120
ns
ns
Note 1: All parameters tested at T A = +25 ° C. Specifications over temperature are guaranteed by design.
Note 2: See Figure 3.
Typical Operating Characteristics
(T A = +25 ° C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY CURRENT vs. SUPPLY VOLTAGE
3.3
(INTERFACE IDLE, ALL OUTPUTS
OFF, R SET = 720 ? )
5.2
(INTERFACE IDLE, ALL OUTPUTS
OFF, R SET = 360 ? )
15
(INTERFACE IDLE, ALL OUTPUTS
ON, R SET = 720 ? )
3.2
3.1
T A = +125 ° C
T A = +85 ° C
5.1
5.0
4.9
T A = +125 ° C
T A = +85 ° C
12
T A = +125 ° C
T A = +85 ° C
3.0
2.9
2.8
4.8
4.7
4.6
9
6
2.7
T A = +25 ° C
4.5
4.4
T A = +25 ° C
3
T A = -40 ° C
T A = +25 ° C
2.6
2.5
T A = -40 ° C
4.3
4.2
T A = -40 ° C
0
3.0
3.5
4.0
4.5
5.0
5.5
3.0
3.5
4.0
4.5
5.0
5.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
4
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