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16-Port, 36V 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.) (Notes 1, 2)
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
50
ns
DOUT_ Rise and Fall Time
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
t LS
C DOUT = 10pF, 20% to 80%
(Note 3)
(Note 3)
(Note 3)
(Note 3)
15
12
120
310
120
330
ns
ns
ns
ns
ns
ns
OE _ Rising to OUT_ Rising Delay
OE _ Falling to OUT_ Falling Delay
LED Output OUT_ Turn-On Fall
Time
LED Output OUT_ Turn-Off Rise
Time
t OE H
t OE L
t f
t r
(Note 3)
(Note 3)
80% to 20% (Note 3)
20% to 80% (Note 3)
120
330
120
120
ns
ns
ns
ns
Note 1: All parameters tested at T A = +25°C. Specifications over temperature are guaranteed by design.
Note 2: See Figure 3.
Note 3: A 65 ? pullup resistor is connected from OUT_ to 5.5V.
Typical Operating Characteristics
(T A = +25°C, unless otherwise noted.)
2.00
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS OFF,
R SET = 720 ? )
3.70
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS OFF,
R SET = 360 ? )
45
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS ON,
R SET = 720 ? )
T A = +125 ° C
T A = +85 ° C
40
1.95
3.65
T A = +125 ° C
T A = +85 ° C
T A = +125 ° C
T A = +85 ° C
35
T A = +25 ° C
1.90
3.60
30
1.85
T A = -40 ° C
3.55
T A =-40 ° C
T A = +25 ° C
25
20
T A = +25 ° C
T A = -40 ° C
1.80
3.50
15
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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