SC4509 Просмотр технического описания (PDF) - Semtech Corporation

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SC4509

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

Semtech Corporation 

POWER MANAGEMENT

Typical Characteristics (Cont.)

Switch Complementary Duty Cycle vs.

Input Voltage vs. LED Current, VOUT = 16V, (4 LED)

35.0%

30.0%

25.0%

20.0%

15.0%

ILED = 20mA

ILED = 30mA

10.0%

5.0%

0.0%

2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3

VIN (V)

Switching Waveform

VIN = 3.6V; ILED = 20mA; VOUT = 16V (4 LEDs)

SC4509

Startup Current

VIN = 3.6V; ILED = 30mA; VOUT = 16V (4 LEDs)

© 2007 Semtech Corp.

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