EL7513 查看數據表（PDF） - Renesas Electronics
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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 = 5, 4 LEDs in a
series; unless otherwise specified.
VCNTL = 1V
35
16.0
15.8
30
15.6
25
15.4
20
15.2
15.0
15
14.8
10
5
0
0
0.5
1.0
1.5
2.0
2.5
VCNTL (V)
14.6
14.4
14.2
14.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
VIN (V)
FIGURE 3. ILED vs VCNTL
FIGURE 4. ILED vs VIN
VIN
4.7µF
L
33µH
BAT54HT1
1µF
8 VIN
LX 4
VOUT 3
CS 7
VCTRL
2 CNTL PGND 5
5
1 COMP SGND 6
0.1µF
FIGURE 5A. 2 LEDs IN A SERIES
FIGURE 5.
2 LEDs IN A SERIES
90
VIN = 4.2V
85
80
VIN = 2.7V
75
L=COILCRAFT LPO1704-333CM
70
5
10
15
20
25
30
IO (mA)
FIGURE 5B. EFFICIENCY vs IO
VIN
4.7µF
L
33µH
BAT54HT1
1µF
VCTRL
0.1µF
8 VIN
LX 4
VOUT 3
CS 7
2 CNTL PGND 5
5
1 COMP SGND 6
FIGURE 6A. 3 LEDs IN A SERIES
FIGURE 6.
3 LEDs IN A SERIES
90
85 VIN = 4.2V
80
VIN = 2.7V
75
L = COILCRAFT LPO1704-333CM
70
5
10
15
20
25
30
IO (mA)
FIGURE 6B. EFFICIENCY vs IO
FN7112 Rev 5.00
December 22, 2008
Page 5 of 12
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