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EL1848IWT-T7A Datasheet(PDF) 5 Page - Intersil Corporation

Part # EL1848IWT-T7A
Description  White LED Step-Up Regulator
Download  12 Pages
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

EL1848IWT-T7A Datasheet(HTML) 5 Page - Intersil Corporation

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5
FIGURE 3. ILED vs VCNTL
FIGURE 4. ILED vs VIN
FIGURE 5A. 2 LEDs IN A SERIES
FIGURE 5B. EFFICIENCY vs IO
FIGURE 5.
FIGURE 6A. 3 LEDs IN A SERIES
FIGURE 6B. EFFICIENCY vs IO
FIGURE 6.
Typical Performance Curves (Continued)
All performance curves and waveforms are taken with C1 = 4.7µF, C2 = 1µF, C3 = 0.1µF, L = 33µF, VIN = 3.3V, VCNTL = 1V, R1 =5Ω, 3 LEDs in a
series; unless otherwise specified.
0
5
10
15
20
25
30
35
00.5
11.5
2
2.5
VCNTL (V)
14
14.2
14.4
14.6
14.8
15
15.2
15.4
15.6
15.8
16
2.5
3.5
4.5
5.5
VIN (V)
VCNTL=1V
34
5
LX
VIN
VOUT
CS
PGND
SGND
CNTL
COMP
4.7µF
0.1µF
1µF
L
33µH
BAT54HT1
VIN
25
16
3
7
4
8
VCTRL
5
Ω
2 LEDs IN A SERIES
90
85
80
75
70
5
10
1520
2530
IO (mA)
L=COILCRAFT LPO1704-333CM
VIN=4.2V
VIN=2.7V
LX
VIN
VOUT
CS
PGND
SGND
CNTL
COMP
4.7µF
0.1µF
1µF
L
33µH
BAT54HT1
VIN
25
16
3
7
4
8
VCTRL
5
Ω
3 LEDs IN A SERIES
90
85
80
75
70
5
10
1520
2530
IO (mA)
L=COILCRAFT LPO1704-333CM
VIN=4.2V
VIN=2.7V
EL1848


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