EL7513(2008) 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
L
BAT54HT1
15µH
4.7µF
1µF
8 VIN
LX 4
3 LEGS OF 4 LEDs IN A SERIES
95
90
VIN=4.2V
VCTRL
0.1µF
VOUT 3
CS 7
2 CNTL PGND 5
1 COMP SGND 6
5Ω 5Ω 5Ω
FIGURE 13A. 3 LEGS of 4 LEDs in a SERIES
FIGURE 13.
85
VIN=2.7V
80
75
L=SUMIDA CMD13D13-15µH
70
15
35
55
75
95
IO (mA)
FIGURE 13B. EFFICIENCY vs IO
Waveforms
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.
C3 = 4700pF
VIN
IIN
VCNTL
ILED
10ms/DIV
FIGURE 14. START-UP
2V/DIV
50mA/DIV
1V/DIV
10mA/DIV
IIN
VCNTL
ILED
50mA/DIV
1V/DIV
10mA/DIV
0.1ms/DIV
FIGURE 15. SHUT-DOWN
VCNTL
VO
ILED
2V
1V
14.2V
12.9V
30mA
15mA
20ms/DIV
FIGURE 16. TRANSIENT RESPONSE
8
ILED = 15mA
ΔVIN
IL
10mV/DIV
100mA/DIV
VLX
10V/DIV
ΔVO
50mV/DIV
1µs/DIV
FIGURE 17. CONTINUOUS CONDUCTION MODE
FN7112.5
December 22, 2008
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