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FAN5776 Datasheet(PDF) 8 Page - Fairchild Semiconductor

No. de pieza FAN5776
Descripción Electrónicos  Synchronous Boost and Series / Parallel 10-LED Driver
Download  15 Pages
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Fabricante Electrónico  FAIRCHILD [Fairchild Semiconductor]
Página de inicio  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5776 Datasheet(HTML) 8 Page - Fairchild Semiconductor

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© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5776
• Rev. 1.1.0
8
Typical Characteristics
VIN = 3.7 V, TA = 25°C, ILED = 5 x 20 mA, VOUT = 6.8 V, L1 = 4.7 µH, COUT = 10 µF (unless otherwise specified).
70
80
90
100
110
120
130
2.50
3.50
4.50
5.50
VIN (V)
VOUT = 7.8 V
VOUT = 8.8 V
VOUT = 6.8 V
VOUT = 5.8 V
-500
-300
-100
100
300
500
0
5
10
15
20
Time (µs)
Figure 10. Maximum Output Current (ILED = 5 x 25 mA)
vs. Input Voltage vs. Output Voltage
Figure 11. LED Current Ripple
Time Base 300µs/div
VIN = 3.70V-3.35 V-3.70 V, slope 30 µs/V
500 mV/div
SI
LED
10 mA/div
500
550
600
650
700
2.5
3.0
3.5
4.0
4.5
5.0
5.5
VIN (V)
Figure 12. Line Transient Response
VIN = 3.70 - 3.35 V - 3.70 V with ILED = 5 x 25 mA
Figure 13. Peak Inductor Current Limit (Closed Loop)
vs. Input Voltage
0.00
0.20
0.40
0.60
0.80
1.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
VIN (V)
0
30
60
90
120
150
0
50
100
150
200
RSET Resistance (k)
Figure 14. Shutdown Current vs. Input Voltage
Figure 15. Total Output Current ILED vs. RSET
Resistor Value


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