MAX6947 Maxim Integrated Products, MAX6947 Datasheet - Page 5

• Manufacturer Part Number: MAX6947
• Description: Constant-Current LED Drivers and I/O Expanders
• Manufacturer: Maxim Integrated Products

www.DataSheet4U.com
(T
A
= +25°C, unless otherwise noted.)
2.0
1.6
1.2
0.8
0.4
4.0
3.6
3.2
2.8
2.4
2.0
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
-40 -25 -10 5 20 35 50 65 80 95 110 125
DELTA SUPPLY CURRENT (I
V
DD
STANDBY CURRENT (I
V
10-Port, Constant-Current LED Drivers and
DD
= 3.6V
I/O Expanders with PWM Intensity Control
vs. TEMPERATURE
vs. TEMPERATURE
= 2.25V
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
V
V
V
V
DD
DD
DD
DD
V
= 3.6V
= 2.7V
= 3.3V
= 3.3V
DD
24
20
16
12
= 2.7V
8
4
0
V
RST
0
DD
DD20
= 2.25V
)
OUTPUT SINKING CURRENT
)
1
vs. V
EXT
V
EXT
2
- V
- V
LED
LED
25
20
15
10
15
12
5
0
9
6
3
0
3
(V)
AT 20mA
-40 -25 -10 5 20 35 50 65 80 95 110 125
-40 -25 -10 5 20 35 50 65 80 95 110 125
DELTA SUPPLY CURRENT (I
4
V
V
DD
SUPPLY CURRENT (I
DD
vs. TEMPERATURE
= 2.25V
vs. TEMPERATURE
= 3.6V
V
TEMPERATURE (°C)
TEMPERATURE (°C)
DD
5
V
= 3.6V
DD
= 2.7V
V
V
DD
DD
Typical Operating Characteristics
V
DD
= 2.7V
= 3.3V
V
DD
= 2.25V
= 3.3V
STAGGER PWM PORT WAVEFORMS
(OUTPUT REGISTERS SET TO 0x80)
DD
DD20
)
)
1ms/div
14
12
10
25
20
15
10
8
6
4
2
0
5
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
MAX6946/47 toc08
OUTPUT SINKING CURRENT
STANDBY CURRENT (I
1
vs. V
vs. TEMPERATURE
TEMPERATURE (°C)
V
EXT
DD
V
V
PORT P0
2V/div
PORT P4
2V/div
PORT P7
2V/div
DD
EXT
2
= 3.6V
- V
= 2.7V
- V
LED
LED
3
(V)
AT 10mA
V
V
DD
DD
STBY
= 3.3V
= 2.25V
4
)
5
5