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MAX6971ANG+

P1-P3P4-P6P7-P9P10-P12
MAX6971
16-Port, 36V Constant-Current LED Driver
4 _______________________________________________________________________________________
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
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 t
CP
52 ns
CLK Pulse-Width High t
CH
24 ns
CLK Pulse-Width Low t
CL
24 ns
DIN Setup Time t
DS
4ns
DIN Hold Time t
DH
8ns
DOUT Propagation Delay t
DO
12 50 ns
DOUT Rise and Fall Time
t
DR
,
t
DF
C
DOUT
= 10pF, 20% to 80% 12 ns
LE Pulse-Width High t
LW
20 ns
LE Setup Time t
LS
15 ns
LE Rising to OUT_ Rising Delay t
LRR
(Note 3) 120 ns
LE Rising to OUT_ Falling Delay t
LRF
(Note 3) 310 ns
CLK Rising to OUT_ Rising Delay
t
CRR
(Note 3) 120 ns
CLK Rising to OUT_ Falling Delay
t
CRF
(Note 3) 330 ns
OE Rising to OUT_ Rising Delay
t
OEH
(Note 3) 120 ns
OE Falling to OUT_ Falling Delay
t
OEL
(Note 3) 330 ns
LED Output OUT_ Turn-On Fall
Time
t
f
80% to 20% (Note 3) 120 ns
LED Output OUT_ Turn-Off Rise
Time
t
r
20% to 80% (Note 3) 120 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 65Ω pullup resistor connected from OUT_ to 5.5V.
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS OFF,
R
SET
= 720Ω)
MAX6971 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.04.53.5 4.0
1.85
1.90
1.95
2.00
1.80
3.0 5.5
T
A
= +125
°
C
T
A
= +85
°
C
T
A
= -40
°
C
T
A
= +25
°
C
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS OFF,
R
SET
= 360Ω)
MAX6971 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.04.53.5 4.0
3.55
3.60
3.65
3.70
3.50
3.0 5.5
T
A
= +125
°
C
T
A
= +85
°
C
T
A
= -40°C
T
A
= +25°C
10
30
25
20
15
35
40
3.0 4.03.5 4.5 5.0 5.5
MAX6971 toc03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS ON, R
SET
= 720Ω)
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
MAX6971
16-Port, 36V Constant-Current LED Driver
_______________________________________________________________________________________ 5
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
15
20
30
25
45
40
35
3.0 4.03.5 4.5 5.0 5.5
MAX6971 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(INTERFACE IDLE, ALL OUTPUTS ON, R
SET
= 360Ω)
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0
10
5
20
15
25
30
0 1.0 1.50.5 2.0 2.5 3.0
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (R
SET
= 720Ω, V+ = 3.3V)
MAX6971 toc05
PORT OUTPUT VOLTAGE (V)
PORT OUTPUT CURRENT (mA)
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0
20
10
40
30
50
60
0 1.0 1.50.5 2.0 2.5 3.0
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (R
SET
= 360Ω, V+ = 3.3V)
MAX6971 toc06
PORT OUTPUT VOLTAGE (V)
PORT OUTPUT CURRENT (mA)
T
A
= +125°C
T
A
= +85°C
T
A
= -40°C
T
A
= +25°C
0
10
5
20
15
25
30
0 1.0 1.50.5 2.0 2.5 3.0
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (R
SET
= 720Ω, V+ = 5.0V)
MAX6971 toc07
PORT OUTPUT VOLTAGE (V)
PORT OUTPUT CURRENT (mA)
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0
20
10
40
30
50
60
0 1.0 1.50.5 2.0 2.5 3.0
PORT OUTPUT CURRENT vs. PORT OUTPUT
VOLTAGE (R
SET
= 360Ω, V+ = 5.0V)
MAX6971 toc08
PORT OUTPUT VOLTAGE (V)
PORT OUTPUT CURRENT (mA)
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
25.0
24.5
24.0
23.5
23.0
3.0 4.0
3.5
4.5 5.0 5.5
PORT OUTPUT CURRENT vs. SUPPLY
VOLTAGE (R
SET
= 720Ω, V
OUT
= 2V)
MAX6971 toc09
SUPPLY VOLTAGE (V)
PORT OUTPUT CURRENT (mA)
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
T
A
= +125°C
49
48
47
46
3.0 4.0
3.5
4.5 5.0 5.5
PORT OUTPUT CURRENT vs. SUPPLY
VOLTAGE (R
SET
= 360Ω, V
OUT
= 2V)
MAX6971 toc10
SUPPLY VOLTAGE (V)
PORT OUTPUT CURRENT (mA)
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0
10
30
20
40
50
021345
PORT OUTPUT CURRENT
vs. R
SET
RESISTANCE (V+ = 5.0V)
MAX6971 toc11
R
SET
RESISTANCE (kΩ)
PORT OUTPUT CURRENT (mA)
MAX6971
16-Port, 36V Constant-Current LED Driver
6 _______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1 GND Ground
2 DIN Serial-Data Input. Data is loaded into the internal 16-bit shift register on CLK’s rising edge.
3 CLK Serial-Clock Input. Data is loaded into the internal 16-bit shift register on CLK’s rising edge.
4LE
Load - E nab l e Inp ut. D ata i s l oad ed tr ansp ar entl y fr om the i nter nal shi ft r eg i ster ( s) to the outp ut l atch( es)
w hi l e LE i s hi g h. D ata i s l atched i nto the outp ut l atch( es) on LE ’ s fal l i ng ed g e, and r etai ned w hi l e LE i s l ow .
5–20
OUT0–OUT15
LED Driver Outputs. OUT0 to OUT15 are open-drain, constant-current-sinking outputs rated to 36V.
21 OE
Output-Enable Input. High forces outputs OUT0 to OUT15 high impedance, without altering the contents
of the output latches. Low enables outputs OUT0 to OUT15 to follow the state of the output latches.
22 DOUT
Serial-Data Output. Data is clocked out of the 16-bit internal shift register to DOUT on CLK’s rising edge.
23 SET LED Current Setting. Connect SET to GND through a resistor (R
SET
) to set the maximum LED current.
24 V+ Positive Supply Voltage. Bypass V+ to GND with a 0.1µF ceramic capacitor.
SERIAL-TO-PARALLEL SHIFT REGISTER
LATCHES
OUT0
OUT1
OUT2
DOUTDIN
CLK
OUT15
CONSTANT-CURRENT SINKS
OUT3
OUT4
POWER-ON
RESET
V+
CURRENT
REFERENCE
OE
GND GND
LE
D0 D15
D0 D15
D0 D15
R
SET
MAX6971
V+
Figure 1. Block Diagram
P1-P3P4-P6P7-P9P10-P12

MAX6971ANG+

Mfr. #:
Buy MAX6971ANG+
Manufacturer:
Maxim Integrated
Description:
LED Lighting Drivers 16-Port 36V Constant Current LED Driver
Lifecycle:
New from this manufacturer.
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