EL1848IWTZT7A INTERSIL [Intersil Corporation], EL1848IWTZT7A Datasheet - Page 5

• Manufacturer Part Number: EL1848IWTZT7A
• Description: White LED Step-Up Regulator
• Manufacturer: INTERSIL [Intersil Corporation]

Typical Performance Curves
All performance curves and waveforms are taken with C
series; unless otherwise specified.
V
V
CTRL
CTRL
V
4.7µF
0.1µF
4.7µF
0.1µF
V
IN
IN
35
30
25
20
15
10
5
0
0
FIGURE 5A. 2 LEDs IN A SERIES
FIGURE 6A. 3 LEDs IN A SERIES
FIGURE 3. I
8
2
1
8
2
1
0.5
VIN
CNTL
COMP
VIN
CNTL
COMP
33µH
33µH
L
L
PGND
VOUT
SGND
PGND
VOUT
SGND
1
CS
LX
CS
LED
LX
5
V
CNTL
4
3
7
5
6
4
3
7
5
6
vs V
1.5
(V)
BAT54HT1
BAT54HT1
CNTL
(Continued)
2
5Ω
5Ω
1
= 4.7µF, C
2.5
1µF
1µF
EL1848
FIGURE 5.
FIGURE 6.
2
= 1µF, C
3
= 0.1µF, L = 33µF, V
14.8
14.6
14.4
14.2
15.8
15.6
15.4
15.2
90
85
80
75
70
90
85
80
75
70
16
14
15
5
5
2.5
2 LEDs IN A SERIES
3 LEDs IN A SERIES
V
L=COILCRAFT LPO1704-333CM
L=COILCRAFT LPO1704-333CM
CNTL
V
V
FIGURE 5B. EFFICIENCY vs I
FIGURE 6B. EFFICIENCY vs I
IN
IN
=4.2V
=4.2V
=1V
FIGURE 4. I
10
10
3
IN
= 3.3V, V
3.5
V
V
15
15
IN
IN
I
I
=2.7V
=2.7V
O
O
CNTL
LED
(mA)
(mA)
V
4
IN
vs V
(V)
= 1V, R
20
20
4.5
IN
1
25
O
25
O
= 5Ω, 3 LEDs in a
5
30
30
5.5