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Typical Characteristics
V IN = 3.6V, T A = 25 ° C, I LED = 25mA, L = 10μH, C OUT = 1.0μF
6 LEDs
L = 10μH
C OUT = 1.0μF
Figure 4. 6 LEDs: Efficiency vs. LED Current vs.
Input Voltage
6 LEDs
L = 10μH
C OUT = 1.0μF
I LED = 25mA
Figure 5. Frequency vs. Input Voltage vs. Temperature
0.8
5 LEDs
L = 10μH
C OUT = 1.0μF
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-40°C
+25°C
+85°C
2.7
3
3.3
3.6
3.9
4.2
Input Voltage (V)
Figure 6. 5 LEDs: Efficiency vs. LED Current vs.
Input Voltage
Figure 7. Delta of V FB Over Input Voltage and
Temperature for 6 LEDs with L=10μH and C OUT =1.0μF
6 LEDs
L = 10μH
C OUT = 1.0μF
I LED = 25mA
6 LEDs
L = 10μH
C OUT = 1.0μF
I LED = 25mA
Figure 8. Efficiency vs. Input Voltage vs. Temperature
? 2009 Fairchild Semiconductor Corporation
FAN5343 ? Rev. 1.0.4
6
Figure 9. Over-Voltage Protection vs. Input Voltage
www.fairchildsemi.com
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