ISL97678IRZ-TK 查看數據表（PDF） - Intersil
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ISL97678IRZ-TK Datasheet PDF : 18 Pages
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ISL97678
Typical Performance Curves (Continued)
1.00
50mA
0.95 8P11S
+25°C
0.90
0.85
0.80
0.75
+85°C
0.70
0.65
0°C
0.60
0.55
0.50
0
5
10
15
20
25
30
VIN (V)
FIGURE 11. VHEADROOM vs VIN vs TEMPERATURE AT
50mA
1.0
20mA
0.9 8P11S
0.8
+85°C
0.7
0.6
0.5
0.4
+25°C
0.3
0°C
0.2
0.1
0.0 0
5
10
15
20
25
30
VIN (V)
FIGURE 12. VHEADROOM vs VIN vs TEMPERATURE AT
20mA
10
/SHUT = HIGH
9 PWM DUTY CYCLE = 0%
8
7
+85°C
6
5
4
-40°C
3
2
1
0
0
5
10
15
20
25
30
VIN (V)
FIGURE 13. QUIESCENT CURRENT vs VIN vs
TEMPERATURE WITH /SHUT ENABLE
LX (20V/DIV)
VO (100mV/DIV)
ILED (20mA/DIV)
FIGURE 14. VOUT RIPPLE VOLTAGE
VO (20V/DIV)
EN (5V/DIV)
IIN (1A/DIV)
ILED (50mA/DIV)
FIGURE 15. IN-RUSH CURRENT and LED CURRENT AT
VIN = 12V
VO (20V/DIV)
EN (5V/DIV)
IIN (1A/DIV)
ILED (50mA/DIV)
FIGURE 16. IN-RUSH CURRENT AND LED CURRENT
AT VIN = 26V
9
FN6998.1
November 5, 2009
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