ISL78100 Intersil Corporation, ISL78100 Datasheet - Page 4

• Manufacturer Part Number: ISL78100
• Manufacturer: Intersil Corporation

Typical Performance Curves
FIGURE 1. 8 LEDs EFFICIENCY vs INPUT VOLTAGE vs
FIGURE 3. 3 LEDs EFFICIENCY vs INPUT VOLTAGE vs
400
350
300
250
200
150
100
100
100
50
95
90
85
80
75
70
65
60
95
90
85
80
75
70
65
60
0
FIGURE 5. LEDs PWM DIMMING LINEARITY
0
4
6
I
I
8 LEDs, V
5 LEDs, V
3 LEDs, V
8 LEDs
3 LEDs
I
99%@1kHz
LEDpeak
LEDpeak
LEDpeak
50%@1kHz
DIMMING FREQUENCY AND DUTY CYCLE
DIMMING FREQUENCY AND DUTY CYCLE
50%@10kHz
8 LEDs @ 1kHz
8
20
5 LEDs @ 10kHz
PWM DIMMING DUTY CYCLE (%)
= 380mA
= 380mA
= 380mA
IN
IN
IN
= 12V
= 9V
= 5V
10%@1kHz
10
6
99%@100Hz
40
10%@10kHz
V
4
99%@100Hz
50%@100Hz
V
IN
3 LEDs @ 100Hz
IN
12
(V)
(V)
8 LEDs @ 10kHz
60
5 LEDs @ 100Hz
10%@100Hz
14
10%@100Hz
8
99%@10kHz
10%@10kHz
99%@10kHz
80
16
100
18
10
ISL78100
FIGURE 6. 8 LEDs CURRENT ACCURACY vs INPUT VOLTAGE
FIGURE 2. 5 LEDs EFFICIENCY vs INPUT VOLTAGE vs
FIGURE 4. 8 AND 5 LEDs EFFICIENCY vs PWM DUTY CYCLE
100
100
95
90
85
80
75
70
65
60
-1
-2
-3
-4
-5
-6
95
90
85
80
75
70
65
60
4
3
2
1
0
0
6
4
I
8 LEDs
LEDpeak
5 LEDs
I
LEDpeak
99% @ 100Hz
DIMMING FREQUENCY AND DUTY CYCLE
8
6
10% @ 100Hz
20
PWM DIMMING DUTY CYCLE (%)
= 380mA
= 380mA
99% @ 100Hz
99% @ 10kHz
10
8
40
V
5 LEDs
10% @ 100Hz
V
10% @ 10kHz
IN
IN
10
12
(V)
10% @ 10kHz
(V)
8 LEDs
99% @ 10kHz
60
I
PWM = 10kHz
8 LEDs, V
5 LEDs, V
LEDpeak
12
14
80
= 380mA
14
IN
IN
16
December 17, 2007
= 12V
= 9V
100
FN6626.0
16
18