FAN5341 Fairchild Semiconductor, FAN5341 Datasheet - Page 6

• Manufacturer Part Number: FAN5341
• Description: Fan5341 Series Boost Led Driver With Integrated Schottky Diode And Single-wire Digital Interface
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN5341 • Rev. 1.0.0
Electrical Specifications
90
80
70
60
50
90
80
70
60
50
90
80
70
60
50
5
5
Figure 4. 5 LEDs: Efficiency vs. LED Current
Figure 6. 4 LEDs: Efficiency vs. LED Current
5
Figure 8. 3 LEDs: Efficiency vs. LED Current
5 LEDs
L = 10µH
C
I
3 LEDs
L = 10µH
C
I
4 LEDs
L = 10µH
C
I
LED
LED
LED
OUT
OUT
OUT
= 25mA
= 25mA
= 25mA
= 1.0µF
= 1.0µF
= 1.0µF
VIN=2.8V
VIN=3.6V
VIN=4.2V
VIN=2.7V
VIN=3.6V
VIN=4.2V
VIN=2.7V
VIN=3.6V
VIN=4.2V
10
10
10
LED Current (mA)
LED Current (mA)
LED Current (mA)
vs. Input Voltage
vs. Input Voltage
vs. Input Voltage
15
15
15
20
20
20
25
25
25
6
Figure 9. Over-Voltage Protection vs. Input Voltage
20.0
19.5
19.0
18.5
18.0
17.5
17.0
90
80
70
60
50
-0.2
-0.4
-0.6
0.8
0.6
0.4
0.2
0
5
Figure 7. Delta of V
Figure 5. 5 LEDs: Efficiency vs. LED Current
2.7
2.7
5 LEDs
L = 4.7µH
C
I
LED
OUT
4 LEDs
L = 10µH
C
I
LED
OUT
= 25mA
= 1.0µF
= 25mA
Temperature for 4 LEDs with L=10µH and
= 1.0µF
VIN=2.8V
VIN=3.6V
VIN=4.2V
-40°C
+25°C
+85°C
3
3
10
C
OUT
LED Current (mA)
Input Voltage (V)
3.3
3.3
vs. Input Voltage
Input Voltage (V)
FB
=1.0µF at I
Over Input Voltage and
15
3.6
3.6
LED
=25mA
www.fairchildsemi.com
20
3.9
3.9
25
4.2
4.2