ISL97634 Intersil Corporation, ISL97634 Datasheet - Page 4

• Manufacturer Part Number: ISL97634
• Description: White LED Driver
• Manufacturer: Intersil Corporation

Typical Performance Curves
20.08
20.04
20.00
19.96
19.92
FIGURE 5. DIMMNG LINEARITY (FB VOLTAGE) vs DUTY
90
85
80
75
70
65
60
55
50
100
90
80
70
60
50
40
30
20
10
0
0
0
FIGURE 1. EFFICIENCY vs PWM DUTY CYCLE
0
FIGURE 3. LOAD REGULATION (V
6 LEDs
VI N = 4V
RSET = 4Ω
L = 10µH
CYCLE
6 LEDs, 22µH
20
5
20
3 LEDs, 22µH
PWM DUTY CYCLE (%)
40
10
3 LEDs, 10µH
40
DUTY CYCLE (%)
V
1kHz
32kHz
4
OUT
60
15
60
(V)
20kHz
4 LEDs, 10µH
ILED_peak = 25mA
V
RSET = 4Ω
f
20
80
PWM
80
IN
= 4V
IN
= 1kHz
6 LEDs, 10µH
= 4V)
25
100
100
120
30
ISL97634
FIGURE 2. QUIESCENT CURRENT vs V
19.76
19.74
19.72
19.70
19.68
19.66
19.64
19.62
-0.2
LX
1.0
0.8
0.6
0.4
0.2
0.0
PWM/EN
ILED
V
OUT
0
2.5
FIGURE 6. PWM DIMMING AT 1kHz, D = 1%
3.0
1
FIGURE 4. LINE REGULATION
2
3.5
V
V
IN
IN
4.0
3
(V)
(V)
4.5
4
IN
(PWM/EN = HI)
V
R1 = 4 Ω
L1 = 22µH
5.0
IN
5
= 4V
April 10, 2007
FN6264.2
5.5
6