MAX8822 Maxim Integrated Products, MAX8822 Datasheet - Page 4

• Manufacturer Part Number: MAX8822
• Description: Ultra-Efficient Negative Charge-Pump LED Driver
• Manufacturer: Maxim Integrated Products

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Ultra-Efficient Negative Charge-Pump LED
Driver with Dual LDOs in 3mm x 3mm Thin QFN
(V
4
IN
100
140
120
100
100
90
80
70
60
50
40
80
60
40
20
90
80
70
60
50
40
30
20
10
_______________________________________________________________________________________
0
0
= 3.6V, V
2.7
4.2
SUPPLY CURRENT vs. SUPPLY VOLTAGE
2.7
EFFICIENCY vs. Li+ BATTERY VOLTAGE
14.4mA/LED
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
EFFICIENCY vs. SUPPLY VOLTAGE
1.6mA/LED
3.9
3.0
3.0
EN_
(4 MATCHED WLEDs)
3.8
(4 MATCHED WLEDs)
6.4mA/LED
SUPPLY VOLTAGE (V)
6.4mA/LED
SUPPLY VOLTAGE (V)
V
= V
IN
3.3
(4 WLEDs)
3.3
FALLING MISMATCHED LEDs
3.7
20mA/LED
IN
14.4mA/LED
, Circuit of Typical Operating Circuit , T
20.8mA/LED
3.6
3.6
1.6mA/LED
3.6
20.8mA/LED
14.4mA/LED
6.4mA/LED
1.6mA/LED
V
IN
3.5 3.4 3.0
3.9
3.9
FALLING
4.2
4.2
100
100
100
90
80
70
60
50
40
80
60
40
20
90
80
70
60
50
40
30
20
10
0
0
SUPPLY CURRENT vs. SUPPLY VOLTAGE
4.2
2.7
2.7
EFFICIENCY vs. Li+ BATTERY VOLTAGE
RGB MODULE: LUMEX SML-LX3632SISUGSBC,
V
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
IN
EFFICIENCY vs. SUPPLY VOLTAGE
3.9
FALLING
1.6mA/LED
1.6mA/LED
3.0
3.0
(4 MISMATCHED WLEDs)
(4 MISMATCHED WLEDs)
3.8
1.6mA/LED
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
A
(RGB MODULE)
= +25°C, unless otherwise noted.)
3.3
3.3
6.4mA/LED
3.7
14.4mA/LED
20.8mA/LED
14.4mA/LED
3.6
3.6
Typical Operating Characteristics
3.6
14.4mA/LED
V
IN
3.5 3.4 3.0
3.9
3.9
FALLING
4.2
4.2
100
100
2.8
2.4
2.0
1.6
1.2
0.8
0.4
90
80
70
60
50
40
90
80
70
60
50
40
30
20
10
0
0
2.7
4.2
2.7
EFFICIENCY vs. Li+ BATTERY VOLTAGE
14.4mA/LED
6.4mA/LED
20.8mA/LED
Li+ BATTERY VOLTAGE (V, TIME-WEIGHTED)
EFFICIENCY vs. SUPPLY VOLTAGE
3.9
vs. SUPPLY VOLTAGE (4 WLEDs)
3.0
3.0
6.4mA/LED
(4 MISMATCHED WLEDs)
6.4mA/LED
(4 MISMATCHED WLEDs)
INPUT VOLTAGE RIPPLE
3.8
V
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
IN
FALLING, MISMATCHED LEDs
3.3
3.3
3.7
20.8mA/LED
3.6
3.6
3.6
20.8mA/LED
V
IN
3.5 3.4 3.0
3.9
3.9
FALLING
4.2
4.2