MAX6979 查看數據表（PDF） - Maxim Integrated
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MAX6979
Maxim Integrated
MAX6979 Datasheet PDF : 12 Pages
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16-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, TA = TMIN to TMAX, unless otherwise noted.) (Notes 1 and 2)
PARAMETER
CLK Clock Period
CLK Pulse-Width High
CLK Pulse-Width Low
DIN Setup Time
DIN Hold Time
DOUT Propagation Delay
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
OE Rising to OUT Rising Delay
OE Falling to OUT Falling Delay
LED Output OUT Turn-On Fall
Time
SYMBOL
tCP
tCH
tCL
tDS
tDH
tDO
tLS
CONDITIONS
CDOUT = 10pF, 20% to 80%
tOEH
tOEL
tf
80% to 20%
MIN TYP
52
24
24
4
8
12
15
LED Output OUT Turn-Off Rise
Time
tr
20% to 80%
Note 1: All parameters tested at TA = +25°C. Specifications overtemperature are guaranteed by design.
Note 2: See Figure 3.
MAX
50
12
120
310
120
330
120
330
120
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
120
ns
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS OFF,
RSET = 720Ω)
4.50
4.25
TA = +125°C
4.00
TA = +85°C
3.75
3.50
3.25
3.00
TA = -40°C
TA = +25°C
2.75
2.50
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS OFF,
RSET = 360Ω)
6.0
5.8
TA = +125°C
5.6
TA = +85°C
5.4
5.2
5.0
4.8
4.6
TA = -40°C
4.4
TA = +25°C
4.2
4.0
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS ON,
RSET = 720Ω)
20
TA = +125°C
18
TA = +85°C
16
14
12
10
TA = -40°C
8
TA = +25°C
6
3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
4 _______________________________________________________________________________________
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