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MAX1561 Fiches technique(PDF) 4 Page - Maxim Integrated Products

No de pièce MAX1561
Description  High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs
Download  10 Pages
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1561 Fiches technique(HTML) 4 Page - Maxim Integrated Products

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High-Efficiency, 26V Step-Up Converters
for Two to Six White LEDs
4
_______________________________________________________________________________________
Typical Operating Characteristics
(Circuit of Figure 1, VIN = 3.6V, ILED = 15mA, L1 = 22µH, CIN = 2.2µF, COUT = 0.1µF, CCOMP = 0.1µF, RSENSE = 7.5
Ω, 4 LEDs,
TA = +25°C, unless otherwise noted.)
40
60
50
80
70
90
100
010
515
20
MAX1561
EFFICIENCY vs. LED CURRENT
(vs. NUMBER of LEDs)
LED CURRENT (mA)
2 LEDs
4 LEDs
6 LEDs
40
60
50
80
70
90
100
010
515
20
MAX1561
EFFICIENCY vs. LED CURRENT
(vs. INPUT VOLTAGE)
LED CURRENT (mA)
4.2VIN
3.6VIN
2.7VIN
40
60
50
80
70
90
100
010
515
20
MAX1561
EFFICIENCY vs. LED CURRENT
(vs. INDUCTANCE)
LED CURRENT (mA)
10
µH
4.7
µH
47
µH
22
µH
40
60
50
80
70
90
100
010
515
20
MAX1599 EFFICIENCY vs. LED CURRENT
(vs. NUMBER OF LEDs)
LED CURRENT (mA)
6 LEDs
2 LEDs
4 LEDs
40
60
50
80
70
90
100
010
515
20
MAX1599 EFFICIENCY vs. LED CURRENT
(vs. INPUT VOLTAGE)
LED CURRENT (mA)
2.7VIN
3.6VIN
4.2VIN
40
60
50
80
70
90
100
010
515
20
MAX1599 EFFICIENCY vs. LED CURRENT
(vs. INDUCTANCE)
LED CURRENT (mA)
47
µH
22
µH
0
5
10
20
15
25
0
20304050
10
60 70 80 90 100
LED CURRENT vs. DIRECT-PWM
DIMMING DUTY CYCLE
DIRECT-PWM DIMMING DUTY CYCLE (%)
VCTRL = SQUARE WAVE
200Hz < FREQ < 200kHz
0
10
5
15
30
35
25
20
40
0
10152025
5
3035404550
INPUT RIPPLE vs. INDUCTANCE
INDUCTANCE (
µH)
0
1
2
4
5
3
6
0
2
345
1
6789
10
INPUT RIPPLE SPECTRUM
FREQUENCY (MHz)


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