MAX8631X Ver la hoja de datos (PDF) - Maxim Integrated
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MAX8631X Datasheet PDF : 15 Pages
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1x/1.5x/2x White LED Charge Pump with
Two LDOs in 4mm x 4mm Thin QFN
Typical Operating Characteristics (continued)
(VIN = VEN_ = 3.6V, circuit of Figure 1, TA = +25°C, unless otherwise noted.)
BATTERY CURRENT vs. SUPPLY
VOLTAGE DRIVING FLASH
900
800
700
600 IFLASH = 400mA
500
400 IFLASH = 160mA
300
IFLASH = 80mA
200
100
0
2.7 3.0 3.3 3.6 3.9 4.2
SUPPLY VOLTAGE (V)
INPUT RIPPLE VOLTAGE vs. SUPPLY
VOLTAGE WITH FLASH AND MAIN LEDs
10
9 FOUR MAIN LEDs AT 15mA EACH
8
IFLASH = 10mA
7
IFLASH = 40mA
6
IFLASH = 100mA
5
4
3
2
1
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
LDO GROUND PIN SUPPLY
CURRENT vs. SUPPLY VOLTAGE
160
VENM = VENF = 0V, VENLDO = VIN
150
140
130 NO LOAD, BOTH LDOs 150mA, BOTH LDOs
120
110
100
90
80
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
LED CURRENT MATCHING vs. SUPPLY
VOLTAGE WITH FOUR MAIN LEDs
16.0
15.8
15.6
15.4
15.2
15.0
14.8
14.6
14.4
14.2
14.0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
INPUT RIPPLE VOLTAGE vs. SUPPLY
VOLTAGE WITH FOUR MAIN LEDs
1.2
1.0
ILED = 15mA
0.8
0.6
ILED = 4.5mA
0.4
ILED = 1.5mA
0.2
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
LED CURRENT MATCHING vs. SUPPLY
VOLTAGE WITH FOUR FLASH LEDs
102.0
101.5
101.0
100.5
100.0
99.5
99.0
98.5
98.0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
LED CURRENT vs. AMBIENT
TEMPERATURE WITH FOUR MAIN LEDs
70
60
50
40
30
20
10
0
-40 -15
10
35
60
85
AMBIENT TEMPERATURE (°C)
LED CURRENT vs. AMBIENT
TEMPERATURE WITH FLASH
450
400
350
300
250
200
150
100
50
0
-40 -15
10
35
60
85
AMBIENT TEMPERATURE (°C)
INDIVIDUAL MAIN LED CURRENT
vs. RSETM
100
10
1
1
10
100
RSETM (kΩ)
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