MAX1985EVKIT Maxim Integrated Products, MAX1985EVKIT Datasheet - Page 6

• Manufacturer Part Number: MAX1985EVKIT
• Description: Power Management Modules & Development Tools MAX1985 EVAL KIT MAX1985 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX1985EVKIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Ultra-High-Efficiency White
LED Drivers
(Circuit of Figure 1; V
6
100
100
100
_______________________________________________________________________________________
90
80
70
60
50
90
80
70
60
50
95
90
85
80
vs. INPUT VOLTAGE (25mA LED CURRENT)
2.5
0
0
V
STEP-UP REGULATOR EFFICIENCY
IN
STEP-UP REGULATOR EFFICIENCY
V
= 3.0V
3.0
IN
vs. LED CURRENT (8 LEDs)
vs. LED CURRENT (6 LEDs)
5
5
= 3.6V
V
TOTAL EFFICIENCY
IN
8 LEDs
LED CURRENT (mA)
LED CURRENT (mA)
INPUT VOLTAGE (V)
3.5
= 3.0V
10
10
6 LEDs
IN
η
V
TOTAL
4 LEDs
4.0
IN
= 3.3V, SETI = IN, MODE = IN, T
= 3.6V
15
15
=
4.5
INPUT_POWER
i = 1
Σ
η
V
V
IN
V
IN
LEDi
= 4.2V
= 4.2V
20
20
5.0
x I
LEDi
25
5.5
25
100
100
100
90
80
70
60
50
90
80
70
60
50
90
80
70
60
50
2.5
vs. INPUT VOLTAGE (4mA LED CURRENT)
0
0
STEP-UP REGULATOR EFFICIENCY
STEP-UP REGULATOR EFFICIENCY
A
3.0
vs. LED CURRENT (6 LEDs)
vs. LED CURRENT (4 LEDs)
= +25°C, unless otherwise noted.)
5
5
V
TOTAL EFFICIENCY
IN
LED CURRENT (mA)
INPUT VOLTAGE (V)
3.5
LED CURRENT (mA)
= 3.0V
V
V
V
10
10
IN
IN
IN
η
4 LEDs
6 LEDs
8 LEDs
= 4.2V
= 3.0V
TOTAL
= 3.6V
4.0
V
IN
Typical Operating Characteristics
= 3.6V
=
15
15
INPUT_POWER
i = 1
4.5
Σ
η
V
V
LEDi
IN
20
20
= 4.2V
5.0
x I
LEDi
5.5
25
25
100
100
100
90
80
70
60
50
90
80
70
60
50
90
80
70
60
50
2.5
0
0
TOTAL EFFICIENCY vs. INPUT VOLTAGE
V
V
V
STEP-UP REGULATOR EFFICIENCY
IN
IN
IN
= 3.0V
= 3.6V
= 4.2V
3.0
vs. LED CURRENT (4 LEDs)
vs. LED CURRENT (8 LEDs)
5
5
(25mA LED CURRENT)
TOTAL EFFICIENCY
8 LEDs
LED CURRENT (mA)
LED CURRENT (mA)
INPUT VOLTAGE (V)
3.5
6 LEDs
V
4 LEDs
IN
V
10
10
= 3.0V
IN
η
= 3.6V
TOTAL
4.0
15
15
=
4.5
INPUT_POWER
i = 1
Σ
η
V
V
IN
LEDi
= 4.2V
20
20
5.0
x I
LEDi
5.5
25
25