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MAX1582 Datasheet(Fiches technique) 4 Page - Maxim Integrated Products

Numéro de pièce MAX1582
Description  High-Efficiency, 26V Step-Up Converter for White LED Main and Subdisplay Backlighting
Télécharger  10 Pages
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1582 Datasheet(HTML) 4 Page - Maxim Integrated Products

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background image
40
60
50
80
70
90
100
010
515
20
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
EFFICIENCY vs. LED CURRENT
(vs. INPUT VOLTAGE)
LED CURRENT (mA)
4.2 VIN
3.6 VIN
2.7 VIN
40
60
50
80
70
90
100
010
515
20
EFFICIENCY vs. LED CURRENT
(vs. INDUCTANCE)
LED CURRENT (mA)
10
µH
4.7
µH
47
µH
22
µH
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
2345
1
6
789
10
INPUT RIPPLE SPECTRUM
FREQUENCY (MHz)
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
Typical Operating Characteristics
(See the Typical Applications Circuit, VV+ = VVP = 3.6V, ILED = 15mA, L1 = 22µH, COUT1 = 0.1µF, CCOMP = 0.022µF, RSENSE = 7.5
Ω,
VCTRL = 1.5V, 4 LEDs, TA = +25°C, unless otherwise noted.)
High-Efficiency, 26V Step-Up Converter
for White LED Main and Subdisplay Backlighting
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(VV+ = +3.0V, VOUT1 = +20V, L1 = 22µH, COUT = 0.1µF, CCOMP = 0.022µF, RSENSE = 7.5
Ω, VCTRL = +1.5V, EN1 = EN2 = V+, TA =
-40°C to +85°C, unless otherwise noted.) (Notes 1, 3)
PARAMETER
CONDITIONS
MIN
MAX
UNITS
Maximum Duty Cycle
CTRL = V+, CS = GND
91
%
N-CHANNEL SWITCH
LX On-Resistance
2.25
LX Current Limit
Duty cycle = 90%
450
950
mA
Note 1: Limits are 100% production tested at TA = +25°C for UCSP parts. Limits over the entire operating temperature range are
guaranteed by design and characterization but are not production tested.
Note 2: The minimum output voltage is the input voltage minus the forward voltage drop of the Schottky diode:
VOUT(MIN) = VV+ - VDIODE
Note 3: Specifications to -40°C are guaranteed by design and not production tested.


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