ISL78171 Datasheet, PDF (8/29 Pages) Intersil Corporation – 6-Channel, 50mA Automotive LED Driver with Ultra-high Dimming Ratio and Phase Shift Control

ISL78171
Typical Performance Curves LED configuration: 6P10S
95
12V
90
85
95
24V
90
12V
85
80
5V
75
24V
70
26.5V
80
5V
26.5V
75
70
65
65
60
60
55
55
50
0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20
LED CURRENT (A)
FIGURE 3. EFFICIENCY vs LED CURRENT AT LX
FREQUENCY = 600kHz AT -40°C vs V_IN
50
0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20
LED CURRENT (A)
FIGURE 4. EFFICIENCY vs LED CURRENT AT LX
FREQUENCY = 600kHz AT +25°C vs V_IN
95
24V
90
12V
85
80
5V
75
26.5V
70
65
60
55
50 _{0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20}
LED CURRENT (A)
FIGURE 5. EFFICIENCY vs LED CURRENT AT LX
FREQUENCY = 600kHz AT +105°C vsV_IN
95
90
-40°C
85
80
75
+25°C
+105°C
70
65
60 ₀
5
10
15
20
25
30
V_IN (V)
FIGURE 6. EFFICIENCY vs INPUT VOLTAGE AT LX
FREQUENCY = 600kHz vs V_IN
95
90
12V
85
80
75
26.5V
5V
70
24V
65
60
55
50 _{0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20}
LED CURRENT (A)
FIGURE 7. EFFICIENCY vs LED CURRENT AT LX
FREQUENCY = 1.2MHz AT -40°C vs V_IN
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8
95
24V
90
85
12V
80
5V
75
26.5V
70
65
60
55
50
0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20
LED CURRENT (A)
FIGURE 8. EFFICIENCY vs LED CURRENT AT LX
FREQUENCY = 1.2MHz AT +25°C vs V_IN
FN8602.0
June 15, 2015