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MAX1848 Fiches technique(PDF) 4 Page - Maxim Integrated Products

No de pièce MAX1848
Description  White LED Step-Up Converter in SOT23
Download  9 Pages
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1848 Fiches technique(HTML) 4 Page - Maxim Integrated Products

  MAX1848 Datasheet HTML 1Page - Maxim Integrated Products MAX1848 Datasheet HTML 2Page - Maxim Integrated Products MAX1848 Datasheet HTML 3Page - Maxim Integrated Products MAX1848 Datasheet HTML 4Page - Maxim Integrated Products MAX1848 Datasheet HTML 5Page - Maxim Integrated Products MAX1848 Datasheet HTML 6Page - Maxim Integrated Products MAX1848 Datasheet HTML 7Page - Maxim Integrated Products MAX1848 Datasheet HTML 8Page - Maxim Integrated Products MAX1848 Datasheet HTML 9Page - Maxim Integrated Products  
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White LED Step-Up Converter in SOT23
4
_______________________________________________________________________________________
Typical Operating Characteristics
(See Typical Application Circuit, V+ = 3V, ILED = 15mA, L = 33µH, COUT = 1µF, CCOMP = 0.15µF, RSENSE = 5
Ω, CTRL = 1V, 2 LEDs,
TA = +25
°C, unless otherwise noted.)
80
82
86
84
88
90
2.5
3.5
3.0
4.0
4.5
5.0
5.5
EFFICIENCY vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
2 LEDs
3 LEDs
IOUT = 15mA
90
85
80
75
70
030
10
20
40
50
60
EFFICIENCY vs. LOAD CURRENT
LOAD CURRENT (mA)
2 LEDs
3 LEDs
SWITCHING FREQUENCY
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
1.1
1.2
1.3
1.4
2.5
3.5
3.0
4.0
4.5
5.0
5.5
TA = +85
°C
TA = +25
°C
TA = -40
°C
50ms/div
POWER-UP WAVEFORMS
VCTRL
IIN
ILED
0
1V
38mA
0
MAX1848 toc04
15mA
0
tRISE = 15ms
CCOMP = 0.15
µF
50ms/div
POWER-UP WAVEFORMS
VCTRL
IIN
ILED
0
1V
38mA
0
MAX1848 toc05
15mA
0
tRISE = 110ms
CCOMP = 1
µF
20
µs/div
SHUTDOWN WAVEFORMS
VCTRL
IIN
ILED
0
1V
38mA
0
MAX1848 toc06
15mA
0
2
µs/div
SHUTDOWN WAVEFORMS
VCTRL
VOUT
VCOMP
0
1V
6.3V
4.9V
MAX1848 toc07
1.5V
0
VOUT EVENTUALLY
DECAYS TO V+ = 3V
5ms/div
LINE-TRANSIENT RESPONSE
VIN
VOUT
ILED
3.00V
3.50V
6.25V
500mV/div
MAX1848 toc08
15mA
10mA/div
CCOMP = 0.15
µF
20ms/div
VCTRL TRANSIENT RESPONSE
VCTRL
VOUT
ILED
1.0V
2.0V
6.7V
6.3V
MAX1848 toc09
30mA
15mA
CCOMP = 0.15
µF


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