MAX6948B MAXIM [Maxim Integrated Products], MAX6948B Datasheet - Page 7

• Manufacturer Part Number: MAX6948B
• Description: High-Efficiency PWM LED Driver with Boost Converter and Five Constant-Current GPIO Ports
• Manufacturer: MAXIM [Maxim Integrated Products]

Converter and Five Constant-Current GPIO Ports
(V+ = 3.3V, V
5.70
5.65
5.60
5.55
5.50
5.45
5.40
5.35
5.30
6.0
5.9
5.8
5.7
5.6
5.5
5.4
2.70
2.70
FULL CURRENT AND HALF CURRENT)
T
DELTA SUPPLY CURRENT P0 vs. V+
A
(DIFFERENCE IN CURRENT FROM
= -40NC, +25NC, +85NC, +105NC
DD
3.16
3.16
High-Efficiency PWM LED Driver with Boost
SUPPLY CURRENT vs. V+
(BOOST ON, 10% PWM,
= 2.5V, T
PORT OFF TO ON)
40
30
20
10
0
3.62
3.62
0
V+ (V)
V+ (V)
+25NC, +85NC, +105NC
A
FULL-CURRENT PO
FULL-CURRENT P2
HALF-CURRENT P2
4.08
OUTPUT SINKING CURRENT
4.08
0.2
HALF-CURRENT PO
= +25NC, unless otherwise noted.)
-40NC
4.54
4.54
vs. V
0.4
V
PORT
PORT
(V)
5.00
5.00
0.6
V+ = 5V
0.8
5.70
5.65
5.60
5.55
5.50
5.45
5.40
5.35
5.30
6.5
6.4
6.3
6.2
6.1
6.0
5.9
5.8
5.7
Typical Operating Characteristics (continued)
2.70
2.70
FULL CURRENT AND HALF CURRENT)
DELTA SUPPLY CURRENT P2 vs. V+
1.0
T
A
= -40NC, +25NC, +85NC, +105NC
3.16
3.16
(DIFFERENCE IN CURRENT
SUPPLY CURRENT vs. V+
FROM PORT OFF TO ON)
(BOOST ON, 50% PWM,
3.62
3.62
V+ (V)
V+ (V)
+25NC, +85NC, +105NC
-40NC
4.08
4.08
BOOST
P0
P2
P3
P1
P4
4.54
4.54
STAGGER PWM PORT WAVEFORMS
5.00
5.00
vs. TIME ALL (50% PWM)
7.2
7.1
7.0
6.9
6.8
6.7
6.6
6.5
6.4
6.3
6.2
40
30
20
10
1ms/div
0
2.70
0
FULL CURRENT AND HALF CURRENT)
T
A
FULL-CURRENT PO
= -40NC, +25NC, +85NC, +105NC
FULL-CURRENT P2
HALF-CURRENT P2
OUTPUT SINKING CURRENT
3.16
HALF-CURRENT PO
SUPPLY CURRENT vs. V+
1
(BOOST ON, 10% PWM,
MAX6948B toc17
3.62
vs. V
2
V
PORT
V+ (V)
PORT
(V)
4.08
3
4.54
V+ = 5V
4
5.00
5
7