ISL97682_14 Datasheet, PDF (8/17 Pages) Intersil Corporation – Compact 2-3-4-Ch LED Drivers with Phase Shift Control

ISL97682, ISL97683, ISL97684
Typical Performance Curves (Continued)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
CALCULATED
1.0
MEASURED
0.5
0
0
0.8
1.6
2.4
3.2
4.0 4.8
DC (%)
FIGURE 9. CURRENT LINEARITY vs LOW LEVEL PWM DIMMING
DUTY CYCLE AT 12V_IN FOR 4P10S AT 20mA/CH
32
30
28
CH3
26
24
22
20
18
16
14
CH2
12
CH4
10
8
CH1
6
4
2
0
0
20
40
60
80
100
DIMMING DUTY CYCLE (%)
FIGURE 10. CURRENT LINEARITY vs PWM DIMMING DUTY CYCLE
AT 12V_IN FOR 4P10S AT 20mA/CH
5
4
3
2
1
0
0
5
10
15
20
25
30
V_IN (V)
FIGURE 11. QUIESCENT CURRENT vs V_IN WITH EN = HIGH, NO
LEDS CONNECTED
1.0
0.8
0.6
0.4
CH4 ^{CH2 CH1 CH3}
0.2
0
0
10
20
30
V_IN (V)
FIGURE 12. CHANNEL VOLTAGE vs V_IN FOR V_IN = 12V AT 4P10S AT
20mA/CH
I_IN (0.5A/DIV)
V_IN (5V/DIV)
ILED (20mA/DIV)
V_IN (5V/DIV)
I_IN (0.5A/DIV)
ILED (20mA/DIV)
FIGURE 13. LINE REGULATION WITH V_IN CHANGE FROM 6V TO 26V
FOR 4P10S AT 20mA/C
FIGURE 14. LINE REGULATION WITH V_IN CHANGE FROM 26V TO 6V
FOR 4P10S AT 20mA/CH
8
FN7689.1
May 16, 2012