ISL97635 查看數據表（PDF） - Intersil
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ISL97635 Datasheet PDF : 28 Pages
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ISL97635
Typical Performance Curves (Continued)
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
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
180
8 CHANNELS
160 9 LEDS PER CHANNEL
VIN = 6V
140
VIN = 12V
120
100
80
60
40
20
VIN = 18V
0
0 10 20 30 40 50 60 70 80 90 100
PWM DUTY CYCLE (%)
FIGURE 8. PWM DIMMING LINEARITY
FIGURE 9. LX, VIIN, IL AND IO AT PWM DIMMING
FIGURE 10. IL AT 50% PWM DIMMING
8
FIGURE 11. IL ZOOM IN AT PWM DIMMING ZOOM IN
FN6434.2
December 22, 2008
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