SC4509SKTRT datasheet(10/15 Pages) SEMTECH

Part #	SC4509SKTRT

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

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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SC4509

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PRELIMINARY

POWER MANAGEMENT

10

40°C

25°C

85°C

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

0.00.4

0.81.2

1.62.0

2.42.8

3.2

3.6

4.0

40°C

25°C

85°C

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

50.0

55.0

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

Output Voltage vs. EN/SS Voltage vs. Temperature,

V

IN = 3.6V; VOUT = 16V

EN/SS Input Current vs. EN/SS Voltage vs. Temperature,

V

IN = 3.6V; VOUT = 16V

VEN/SS (Volts)

LED Current vs. PWM Dimming Duty Cycle

V

IN = 3.6V; VOUT = 16V; FPWM = 1kHz

LED Current vs. PWM Dimming Duty Cycle

V

IN = 3.6V; VOUT = 16V; FPWM = 10kHz

DTY (%)

6

8

10

12

14

16

18

20

22

15

25

35

45

55

65

75

85

95

0

2

4

6

8

10

12

14

16

18

20

22

0

1020

3040

50

6070

8090

100

Switch Current Limit vs. Complementary

Duty Cycle (1-D) vs. Temperature

(1-D) (%)

Switch Current Limit vs. Temperature vs.

Complementary Duty Cycle (1-D)

Temperature (Deg. C)

DTY (%)

Typical Characteristics (Cont.)

100

200

300

400

500

600

700

800

0

10203040

5060708090

100

85°C

25°C

0°C

-40°C

200

250

300

350

400

450

500

550

600

650

700

-40

-20

0

20

40

60

80

100

60%

40%

20%

90%

10%

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SC4509SKTRT Datasheet(PDF) 10 Page - Semtech Corporation

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