ISL97671A Просмотр технического описания (PDF) - Intersil
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ISL97671A Datasheet PDF : 28 Pages
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ISL97671A
Typical Performance Curves (Continued)
1.2
1.0
0.8
4.5 VIN
0.6
12 VIN
0.4
0.2
0
0
1
2
3
4
5
6
DC
FIGURE 9. CURRENT LINEARITY vs LOW LEVEL PWM DIMMING
DUTY CYCLE vs VIN
0.60
+25°C
-40°C
0.55
0.50
0°C
0.45
0.40
0
5
10
15
20
25
30
VIN (V)
FIGURE 10. VHEADROOM vs VIN AT 20mA
VO = 50mV/DIV
2.00µs/DIV
VIN = 6V, 6P12S
VO = 20V/DIV
2.00µs/DIV
FIGURE 11. VOUT RIPPLE VOLTAGE, VIN = 12V, 6P12S AT
20mA/CHANNEL
I_VIN = 1A/DIV
ILED = 20mA/DIV
EN
FIGURE 12. IN-RUSH and LED CURRENT AT VIN = 6V FOR 6P12S AT
20mA/CHANNEL
VIN = 12V, 6P12S
VO = 20V/DIV
2.00µs/DIV
I_VIN = 1A/DIV
ILED = 20mA/DIV
EN
FIGURE 13. IN-RUSH AND LED CURRENT AT VIN = 12V FOR 6P12S
AT 20mA/CHANNEL
6P12S, 20mA/CH
VIN = 10V/DIV
10.0ms/DIV
ILED = 20mA/DIV
I_VIN = 1A/DIV
EN
FIGURE 14. LINE REGULATION WITH VIN CHANGE FROM 6V TO 26V,
VIN = 12V, 6P12S AT 20mA/CHANNEL
9
FN7709.1
March 24, 2011
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