Max6948b, Typical operating characteristics (continued) – Rainbow Electronics MAX6948B User Manual
Page 7
High-Efficiency PWM LED Driver with Boost
Converter and Five Constant-Current GPIO Ports
7
MAX6948B
Typical Operating Characteristics (continued)
(V+ = 3.3V, V
DD
= 2.5V, T
A
= +25NC, unless otherwise noted.)
5.5
5.6
5.7
5.8
5.9
6.0
5.4
MAX6948B toc10
SUPPLY CURRENT (mA)
V+ (V)
SUPPLY CURRENT vs. V+
(BOOST ON, 10% PWM,
FULL CURRENT AND HALF CURRENT)
T
A
= -40NC, +25NC, +85NC, +105NC
4.54
4.08
3.62
3.16
2.70
5.00
SUPPLY CURRENT vs. V+
(BOOST ON, 50% PWM,
FULL CURRENT AND HALF CURRENT)
V+ (V)
SUPPLY CURRENT (mA)
5.8
5.9
6.0
6.1
6.3
6.2
6.4
6.5
5.7
MAX6948B toc11
4.54
4.08
3.62
3.16
2.70
5.00
T
A
= -40NC, +25NC, +85NC, +105NC
6.3
6.4
6.5
6.6
6.7
6.8
6.9
7.0
7.1
7.2
6.2
SUPPLY CURRENT vs. V+
(BOOST ON, 10% PWM,
FULL CURRENT AND HALF CURRENT)
MAX6948B toc12
T
A
= -40NC, +25NC, +85NC, +105NC
V+ (V)
SUPPLY CURRENT (mA)
4.54
4.08
3.62
3.16
2.70
5.00
DELTA SUPPLY CURRENT P2 vs. V+
(DIFFERENCE IN CURRENT
FROM PORT OFF TO ON)
V+ (V)
DELTA SUPPLY CURRENT P2 (mA)
5.35
5.40
5.45
5.50
5.60
5.55
5.65
5.70
5.30
MAX6948B toc14
4.54
4.08
3.62
3.16
2.70
5.00
+25NC, +85NC, +105NC
-40NC
OUTPUT SINKING CURRENT
vs. V
PORT
MAX6948B toc15
V
PORT
(V)
OUTPUT SINKING CURRENT (mA)
4
3
2
1
10
20
30
40
0
0
5
FULL-CURRENT PO
V+ = 5V
HALF-CURRENT PO
FULL-CURRENT P2
HALF-CURRENT P2
OUTPUT SINKING CURRENT
vs. V
PORT
MAX6948B toc16
V
PORT
(V)
OUTPUT SINKING CURRENT (mA)
0.8
0.6
0.4
0.2
10
20
30
40
0
0
1.0
FULL-CURRENT PO
HALF-CURRENT PO
FULL-CURRENT P2
HALF-CURRENT P2
V+ = 5V
STAGGER PWM PORT WAVEFORMS
vs. TIME ALL (50% PWM)
MAX6948B toc17
P0
P2
P3
P1
P4
BOOST
1ms/div
DELTA SUPPLY CURRENT P0 vs. V+
(DIFFERENCE IN CURRENT FROM
PORT OFF TO ON)
V+ (V)
DELTA SUPPLY CURRENT P0 (mA)
5.35
5.40
5.45
5.50
5.60
5.55
5.65
5.70
5.30
MAX6948B toc13
4.54
4.08
3.62
3.16
2.70
5.00
+25NC, +85NC, +105NC
-40NC