ISL97678IRZ-T Просмотр технического описания (PDF) - Renesas Electronics
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ISL97678IRZ-T Datasheet PDF : 17 Pages
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ISL97678
Typical Performance Curves (Continued)
1.0
20mA - 8P12S
0.8 50mA - 8P11S
0.6
0.4
12V/20mA
0.2
0.0
-0.2
-0.4
-0.6
12V/50mA
-0.8
-1.0
1
2
3
4
5
6
7
8
CHANNEL
FIGURE 8. CHANNEL-TO-CHANNEL CURRENT MATCHING EXAMPLE
2.0
1.8
20mA - 8P12S
50mA - 8P11S
1.6
12V/50mA
1.4
1.2
24V/50mA
1.0
0.8
5V/20mA
0.6
0.4
24V/20mA
0.2
0.0
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0
PWM DIMMING DUTY CYCLE (%)
FIGURE 10. CURRENT LINEARITY vs LOW LEVEL PWM DIMMING
DUTY CYCLE
1.0
0.8
50mA
8P11
0.6
0°C
0.4
0.2
0.0
+25°C
-0.2
-0.4
+85°C
-0.6
-0.8
-1.0
0
-40°C
5
10
15
20
25
30
VIN (V)
FIGURE 9. CURRENT MATCHING vs VIN vs TEMPERATURE
2.0
1.8
12V/50mA
20mA - 8P12S
50mA - 8P11S
1.6
1.4
1.2
1.0
0.8
0.6
0.4
12V/20mA
0.2
HEADROOM CONTROL CHANNEL
0.0
1
2
3
4
5
6
7
8
CHANNEL
FIGURE 11. TYPICAL CHANNEL VOLTAGE EXAMPLE
1.00
50mA
0.95 8P11S
+25°C
0.90
0.85
0.80
0.75
+85°C
0.70
0.65
0°C
0.60
0.55
0.50
0
5
10
15
20
25
30
VIN (V)
FIGURE 12. VHEADROOM vs VIN vs TEMPERATURE AT 50mA
1.0
20mA
0.9 8P11S
0.8
+85°C
0.7
0.6
0.5
0.4
+25°C
0.3
0°C
0.2
0.1
0.0
0
5
10
15
20
25
30
VIN (V)
FIGURE 13. VHEADROOM vs VIN vs TEMPERATURE AT 20mA
FN6998 Rev.3.00
Sep 8, 2017
Page 8 of 17
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