ISL97673 Просмотр технического описания (PDF) - Intersil
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ISL97673 Datasheet PDF : 27 Pages
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ISL97673
Typical Performance Curves
100
90
80
70
60
12VIN
24VIN
5VIN
50
40
30
20
10
0
0
5
10
15
20
25
ILED(mA)
FIGURE 3. EFFICIENCY vs up to 20mA LED CURRENT
(100% LED DUTY CYCLE) vs VIN
100
6P10S_30mA/CHANNEL
90
80
70
60
12VIN
24VIN
5VIN
50
40
30
20
10
0
0
5 10 15 20 25 30 35
ILED(mA)
FIGURE 4. EFFICIENCY vs up to 30mA LED CURRENT
(100% LED DUTY CYCLE) vs VIN
100
90
80
70
580k
60
1.2MHz
50
40
30
20
10
0
0
5
10
15
20
25
30
VIN
FIGURE 5. EFFICIENCY vs VIN vs SWITCHING
FREQUENCY AT 20mA (100% LED DUTY
CYCLE)
100
90
80
70 +25°C
60
+85°C
0°C
-40°C
50
40
30
20
10
0
0
5
10
15
20
25
30
VIN
FIGURE 7. EFFICIENCY vs VIN vs TEMPERATURE AT
20mA (100% LED DUTY CYCLE)
100
80
580k
60
1.2MHz
40
20
0
0
5
10
15
20
25
30
VIN
FIGURE 6. EFFICIENCY vs VIN vs SWITCHING
FREQUENCY AT 30mA (100% LED DUTY
CYCLE)
0.40
0.30
0.20
0.10
0.00
-0.10
4.5 VIN
12 VIN
-0.20
-0.30
21 VIN
-0.40
0
1
2
3
4
5
6
7
CHANNEL
FIGURE 8. CHANNEL-TO-CHANNEL CURRENT
MATCHING
8
FN7633.0
June 24, 2010
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