EL1848IY Intersil, EL1848IY Datasheet - Page 6

• Manufacturer Part Number: EL1848IY
• Description: IC LED DRIVR WHITE BCKLGT 8-MSOP
• Manufacturer: Intersil
• Type: Backlight, White LEDr

Specifications of EL1848IY

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.2MHz
• Voltage - Supply: 2.6 V ~ 13.2 V
• Voltage - Output: 14V
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 90mA
• Internal Switch(s): Yes
• Efficiency: 91%
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Typical Performance Curves
All performance curves and waveforms are taken with C
series; unless otherwise specified.
4.7µF
0.1µF
V
V
V
CTRL
CTRL
V
CTRL
V
4.7µF
0.1µF
V
4.7µF
0.1µF
IN
IN
IN
FIGURE 7A. 2 LEGS OF 2 LEDs IN A SERIES
FIGURE 8A. 2 LEGS OF 3 LEDs IN A SERIES
FIGURE 9A. 3 LEGS OF 2 LEDs IN A SERIES
8
2
1
VIN
CNTL
COMP
8
2
1
8
2
1
15µH
VIN
CNTL
COMP
VIN
CNTL
COMP
L
PGND
VOUT
SGND
33µH
33µH
CS
L
LX
L
PGND
VOUT
SGND
PGND
VOUT
SGND
CS
4
3
7
5
6
LX
CS
LX
6
BAT54HT1
4
3
7
5
6
4
3
7
5
6
BAT54HT1
BAT54HT1
5Ω
(Continued)
5Ω
5Ω
5Ω
1
= 4.7µF, C
5Ω
5Ω
5Ω
1µF
1µF
1µF
EL1848
FIGURE 7.
FIGURE 8.
FIGURE 9.
2
= 1µF, C
3
= 0.1µF, L = 33µF, V
90
85
80
75
70
90
85
80
75
70
95
90
85
80
75
70
10
10
15
2 LEGS OF 2 LEDs IN A SERIES
2 LEGS OF 3 LEDs IN A SERIES
3 LEGS OF 2 LEDs IN A SERIES
L=SUMIDA CMD13D13-33µH
L=SUMIDA CMD13D13-15µH
L=COILCRAFT LPO1704-333CM
FIGURE 7B. EFFICIENCY vs I
FIGURE 8B. EFFICIENCY vs I
FIGURE 9B. EFFICIENCY vs I
20
20
IN
35
= 3.3V, V
30
30
I
I
I
O
O
O
CNTL
55
(mA)
(mA)
(mA)
= 1V, R
40
40
V
V
IN
IN
V
V
V
V
IN
IN
75
=4.2V
=2.7V
IN
IN
1
=4.2V
=2.7V
=2.7V
50
O
50
O
=4.2V
O
= 5Ω, 3 LEDs in a
60
60
95