ISL97686_14 Datasheet, PDF (8/23 Pages) Intersil Corporation – 4-Channel LED Driver with Independent Channel Control for Dynamic Dimming

ISL97686
Typical Performance Curves
100
4P14S
95
90
4P18S
85
80
75
70
5
10
15
20
25
30
35
INPUT VOLTAGE (V)
FIGURE 4. EFFICIENCY vs V_IN (I_CH: 100mA, f_DIM: 200Hz, V_OUT: 45V
FOR 4P14S AND 55V FOR 4P18S)
100
V_IN:24V
95
90
V_IN:19V
85
80
75
70
30
50
70
90
110 130 150 170
CHANNEL CURRENT (mA)
FIGURE 5. EFFICIENCY vs I_CH (V_OUT: 55V FOR 4P18S, f_DIM: 200Hz)
100
f_DIM: 200Hz
90
f_DIM: 1kHz
80
70
60
50
40
0
20
40
60
80
100
DIMMING DUTY CYCLE (%)
FIGURE 6. EFFICIENCY vs PWM DIMMING (V_IN: 24V, V_OUT: 55V FOR
4P18S, I_CH: 100mA)
110
100
90
1kHz
80
70
200Hz
60
50
40
30
20
10
0
0
20
40
60
80
100
DIMMING DUTY CYCLE (%)
FIGURE 8. PWM DIMMING LINEARITY (V_IN: 24V, V_OUT: 55V FOR
4P18S)
1.0
0.5
CH2
CH3
CH1
0.0
-0.5
CH4
-1.0
0
20
40
60
80
100
DIMMING DUTY CYCLE (%)
FIGURE 7. ACCURACY vs WPM DIMMING (V_IN: 24V, V_OUT: 55V FOR
4P18S, I_CH: 100mA)
10
9
8
7
6
5
1kHz
4
3
2
200Hz
1
00
2
4
6
8
10
DIMMING DUTY CYCLE (%)
FIGURE 9. PWM DIMMING LINEARITY (V_IN: 24V, V_OUT: 55V FOR
4P18S)
8
FN7953.0
April 23, 2012