MAX1984ETP View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX1984ETP Datasheet PDF : 17 Pages
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Ultra-High-Efficiency White
LED Drivers
Typical Operating Characteristics
(Circuit of Figure 1; VIN = 3.3V, SETI = IN, MODE = IN, TA = +25°C, unless otherwise noted.)
STEP-UP REGULATOR EFFICIENCY
vs. LED CURRENT (8 LEDs)
100
STEP-UP REGULATOR EFFICIENCY
vs. LED CURRENT (6 LEDs)
100
STEP-UP REGULATOR EFFICIENCY
vs. LED CURRENT (4 LEDs)
100
90
VIN = 3.6V
80
VIN = 3.0V
VIN = 4.2V
70
90
VIN = 3.6V
90
80
VIN = 3.0V
VIN = 4.2V
80
70
70
VIN = 3.6V
VIN = 4.2V
VIN = 3.0V
60
60
60
50
0
5
10
15
20
25
LED CURRENT (mA)
STEP-UP REGULATOR EFFICIENCY
vs. INPUT VOLTAGE (25mA LED CURRENT)
100
50
0
5
10
15
20
25
LED CURRENT (mA)
STEP-UP REGULATOR EFFICIENCY
vs. INPUT VOLTAGE (4mA LED CURRENT)
100
50
0
5
10
15
20
25
LED CURRENT (mA)
TOTAL EFFICIENCY
vs. LED CURRENT (8 LEDs)
100
95
90
8 LEDs
6 LEDs
85
4 LEDs
80
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
TOTAL EFFICIENCY
vs. LED CURRENT (6 LEDs)
100
VIN = 3.6V
90 VIN = 3.0V
80
70
60
50
0
VIN = 4.2V
η
ΣVLEDi x ILEDi
ηTOTAL =
i =1
INPUT_POWER
5
10
15
20
25
LED CURRENT (mA)
90
80
8 LEDs
6 LEDs
70
4 LEDs
60
50
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
TOTAL EFFICIENCY
vs. LED CURRENT (4 LEDs)
100
VIN = 3.0V
VIN = 3.6V
90
VIN = 4.2V
80
70
60
50
0
η
ΣVLEDi x ILEDi
ηTOTAL =
i =1
INPUT_POWER
5
10
15
20
25
LED CURRENT (mA)
90
80
70
VIN = 3.0V
60 VIN = 3.6V
VIN = 4.2V
50
0
5
η
ΣVLEDi x ILEDi
ηTOTAL =
i =1
INPUT_POWER
10
15
20
25
LED CURRENT (mA)
TOTAL EFFICIENCY vs. INPUT VOLTAGE
(25mA LED CURRENT)
100
90
80
8 LEDs
70
6 LEDs
4 LEDs
60
50
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
6 _______________________________________________________________________________________
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