
ISL97636A
Typical Performance Curves
92
90
92
90
88
86
88
86
7S6P - 12V
84
82
80
78
7S6P - 12V
9S6P - 12V
7S6P - 18V
9S6P - 18V
84
82
80
78
7S6P - 18V
9S6P - 18V 9S6P - 6V
9S6P - 12V
76
7S6P - 6V
76
74
74
7S6P - 6V
72
70
68
66
0
9S6P - 6V
20
40
60 80
L = 8.2μH
IHLP-2525BD-01
DCR = 106m Ω
I SAT = 3A
100 120
140
72
70
68
66
0
L = 10μH
IHLP-2525BD-01
DCR = 129m Ω
I SAT = 2.5A
20 40
60 80
100
120
140
I O (mA)
FIGURE 2. EFFICIENCY, L = 8.2μH WITH DCR = 106m Ω ,
C O = 4x4.7μF/50V
92
I O (mA)
FIGURE 3. EFFICIENCY, L = 10μH WITH DCR = 129m Ω ,
C O = 4x4.7μF/50V
1.2
90
L = 10μH
DCR ~ 500m Ω
1.0
88 <1mm HEIGHT
0.8
86
9S6P - 18V
0.6
84
82
80
78
76
7S6P - 18V
7S6P - 12V
9S6P - 12V
0.4
0.2
0.0
-0.2
20mA
74
72
70
68
7S6P - 6V
9S6P - 6V
-0.4
-0.6
-0.8
-1.0
66
0
20
40
60 80
100
120
140
-1.2
4
6
8
10
12
14 16
18
20
22
24
26
I O (mA)
FIGURE 4. 3 EFFICIENCY, L = 10μH WITH DCR = 500m Ω ,
1mm, C O = 4x4.7μF/50V
0.020
1.0
V IN (V)
FIGURE 5. CURRENT REGULATION
0.015
6P9S = 54 LEDs
12V/1mA
0.9
V IN = 12V
0.010
0.005
0
-0.005
6V/20mA
12V/20mA
0.8
0.7
20kHz
-0.010
-0.015
6V/1mA
0.6
200Hz
10kHz
1kHz
100Hz
-0.020
Ch 0
Ch 1
Ch 2 Ch 3
Ch 4
Ch 5
0.5
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
CHANNELS
FIGURE 6. CHANNEL-TO-CHANNEL CURRENT MATCHING
6
PWM DUTY CYCLE
FIGURE 7. CURRENT MATCHING vs DUTY CYCLE vs
DIMMING FREQUENCY
FN6566.0
May 9, 2008