ISL97636 Просмотр технического описания (PDF) - Renesas Electronics
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производитель
ISL97636 Datasheet PDF : 18 Pages
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ISL97636
Typical Performance Curves
92
90 7S6P - 18V
88
9S8P - 18V
86
84
7S8P - 18V
82
9S6P - 18V
7S8P - 12V
80
78
7S6P - 12V
9S8P - 12V
9S6P - 12V
76
7S6P - 6V
74
77SS88PP -- 66VV
72
9S6P - 6V
70 9S8P - 6V
68
66
0 20 40 60
L = 8.2µH
IHLP-2525BD-01
DCR = 106m
ISAT = 3A
80 100 120 140 160 180
IO (mA)
FIGURE 2. EFFICIENCY, L = 8.2µH WITH DCR = 106m,
CO = 4x4.7µF/50V
92
90
7S8P - 12V 7S6P - 18V
88 7S6P - 12V
86
9S6P - 18V
84
9S6P - 12V
7S8P - 18V
82
80
9S8P - 18V
9S8P - 12V
78
76
7S6P - 6V
74
77SS88PP -- 66VV
72
70
68
66
0
9S6P - 6V
9S8P - 6V
20 40 60
80 100
IO (mA)
L = 10µH
DCR = ~500m
<1mm HEIGHT
120 140 160 180
FIGURE 4. 3 EFFICIENCY, L = 10µH WITH DCR = 500m,
1mm, CO = 4x4.7µF/50V
2.0
1.5
12V/1mA
1.0
12V/20mA
0.5
0.0
-0.5
6V/20mA
-1.0
6V/1mA
-1.5
-2.0 CH 0 CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 CH 7
CHANNELS
FIGURE 6. CHANNEL-TO-CHANNEL CURRENT MATCHING
FN6570 Rev 0.00
May 9, 2008
92
90 7S6P - 18V
88
86
84
82
7S8P - 18V
80
7S6P - 12V
7S8P - 12V
78
9S8P - 18V
76
9S8P - 12V
74
9S6P - 18V
9S6P - 12V
72
7S6P - 6V
70
77SS88PP--66VV
9S6P - 6V
68
66
9S8P - 6V
0 20 40 60 80 100
L = 10µH
IHLP-2525BD-01
DCR = 129m
ISAT = 2.5A
120 140 160 180
IO (mA)
FIGURE 3. EFFICIENCY, L = 10µH WITH DCR = 129m,
CO = 4x4.7µF/50V
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2 4
20mA
6 8 10 12 14 16 18 20 22 24 26
VIN (V)
FIGURE 5. CURRENT REGULATION
1.0
1kHz
0.9
100kHz
20kHz
0.8
VIN = 12V
0.7
200kHz
0.6
10kHz
0.5
0
10 20 30 40 50 60 70 80 90 100
PWM DUTY CYCLE (%)
FIGURE 7. CURRENT MATCHING vs DUTY CYCLE vs
DIMMING FREQUENCY
Page 6 of 18
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