FAN5346 データシートの表示（PDF） - Fairchild Semiconductor

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FAN5346

Series Boost LED Driver with PWM Dimming Interface

Fairchild Semiconductor 

Typical Characteristics

VIN = 3.6V, TA = 25°C, ILED = 25mA, L = 10µH, COUT = 1.0µF, and CIN = 10.0µF.

90%

90%

80%

80%

70%

VIN=2.5V

60%

VIN=2.7V

VIN=3.6V

VIN=4.2V

50%

VIN=4.5V

5

10

15

20

25

LED Current (mA)

Figure 4. 3 LEDs: Efficiency vs. LED Current

vs. Input Voltage

90%

70%

VIN=2.5V

60%

VIN=2.7V

VIN=3.6V

VIN=4.2V

50%

VIN=4.5V

5

10

15

20

25

LED Current (mA)

Figure 5. 4 LEDs: Efficiency vs. LED Current

vs. Input Voltage

90%

80%

80%

70%

VIN=2.5V

60%

VIN=2.7V

VIN=3.6V

VIN=4.2V

VIN=4.5V

50%

5

10

15

20

25

LED Current (mA)

Figure 6. 5 LEDs: Efficiency vs. LED Current

vs. Input Voltage

90%

70%

VIN=2.5V

60%

VIN=2.7V

VIN=3.6V

VIN=4.2V

50%

VIN=4.5V

5

10

15

20

25

LED Current (mA)

Figure 7. 6 LEDs: Efficiency vs. LED Current

vs. Input Voltage

90%

80%

80%

70%

VIN=2.5V

60%

VIN=2.7V

VIN=3.6V

VIN=4.2V

50%

VIN=4.5V

5

10

15

20

25

LED Current (mA)

Figure 8. 7 LEDs: Efficiency vs. LED Current

vs. Input Voltage

70%

60%

VIN=2.9V

VIN=3.6V

VIN=4.2V

VIN=4.5V

50%

5

10

15

20

25

LED Current (mA)

Figure 9. 8 LEDs: Efficiency vs. LED Current

vs. Input Voltage

© 2011 Fairchild Semiconductor Corporation

FAN5346 • Rev. 1.0.1

6

www.fairchildsemi.com

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