SC4509 Ver la hoja de datos (PDF) - Semtech Corporation

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componentes Descripción

Fabricante

SC4509

Highly Integrated Step-Up Converter for White LED Applications in MLPD-W8-2x2

Semtech Corporation 

SC4509

POWER MANAGEMENT

Typical Characteristics

Efficiency vs. LED Current

VIN = 2.7V, VOUT = 16V, (4 LED)

80%

75%

70%

65%

60%

55%

50%

45%

40%

35%

30%

0

2

4

6

8 10 12 14 16 18 20 22

ILED (mA)

Efficiency vs. LED Current

VIN = 3.6V, VOUT = 16V, (4 LED)

85%

80%

75%

70%

65%

60%

55%

50%

45%

40%

35%

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32

ILED (mA)

Feedback Voltage vs. Temperature vs. LED Current,

203.0

VOUT = 16V

202.0

201.0

ILED = 20mA

200.0

ILED = 30mA

199.0

198.0

Efficiency vs. LED Current

VIN = 3.3V, VOUT = 16V, (4 LED)

85%

80%

75%

70%

65%

60%

55%

50%

45%

40%

35%

30%

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32

ILED (mA)

Efficiency vs. LED Current vs. Input Voltage

VOUT = 12V, (3 LED)

85%

80%

75%

70%

65%

60%

VIN = 2.7V

VIN = 3.6V

55%

50%

45%

40%

35%

0

5

10

15

20

25

30

35

ILED (mA)

Frequency vs. Temperature vs. Input Voltage,

VOUT = 16V

1.20

VIN = 2.7V

1.15

VIN = 3.3V

1.10

VIN = 3.6V

1.05

197.0

-40

-20

0

20

40

60

80

100

1.00

-40

-20

Temperature (Deg. C)

© 2007 Semtech Corp.

9

0

20

40

Temperature (Deg. C)

60

80

www.semtech.com

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