EL7513 データシートの表示（PDF） - Intersil
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EL7513 Datasheet PDF : 12 Pages
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EL7513
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, 4 LEDs in a
series; unless otherwise specified.
VIN
4.7µF
L
BAT54HT1
33µH
1µF
4 LEDs IN A SERIES
90
8 VIN
LX 4
VOUT 3
CS 7
VCTRL
2 CNTL PGND 5
5Ω
1 COMP SGND 6
0.1µF
VIN=4.2V
85
VIN=3.3V
VIN=2.7V
80
75
L=COILCRAFT LPO1704-333CM
70
5
10
15
20
25
30
LED CURRENT (mA)
FIGURE 7A. 4 LEDs IN A SERIES
FIGURE 7.
FIGURE 7B. EFFICIENCY vs IO
VIN
4.7µF
L
BAT54HT1
33µH
1µF
8 VIN
LX 4
VCTRL
0.1µF
VOUT 3
CS 7
2 CNTL PGND 5
1 COMP SGND 6
5Ω 5Ω
FIGURE 8A. 2 LEGS OF 2 LEDs IN A SERIES
FIGURE 8.
2 LEGS OF 2 LEDs IN A SERIES
90
VIN=4.2V
85
VIN=2.7V
80
75
L=COILCRAFT LPO1704-333CM
70
10
20
30
40
50
60
IO (mA)
FIGURE 8B. EFFICIENCY vs IO
VIN
4.7µF
L
BAT54HT1
33µH
1µF
8 VIN
LX 4
VCTRL
0.1µF
VOUT 3
CS 7
2 CNTL PGND 5
1 COMP SGND 6
5Ω 5Ω
FIGURE 9A. 2 LEGS OF 3 LEDs IN A SERIES
FIGURE 9.
2 LEGS OF 3 LEDs IN A SERIES
90
VIN=4.2V
85
VIN=2.7V
80
75
L=SUMIDA CMD13D13-33µH
70
10
20
30
40
50
60
IO (mA)
FIGURE 9B. EFFICIENCY vs IO
6
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