LT3466EDD-1 Ver la hoja de datos (PDF) - Linear Technology

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Fabricante

LT3466EDD-1

White LED Driver and Boost Converter in 3mm × 3mm DFN Package

Linear Technology 

TYPICAL APPLICATIO S

Li-Ion Powered 4 White LEDs Driver and 12V Boost Converter

3V TO 5V

CIN

1µF

4 LEDs

L1

15µH

L2

15µH

COUT1

0.47µF

SW1 VIN SW2

VOUT1

VOUT2

LT3466-1

R1

909k

COUT2

1µF

12V

30mA AT VIN = 3V

60mA AT VIN = 5V

FB1

FB2

RFB1

CTRL1 RT CTRL2

10Ω

OFF ON

38.3k OFF ON

1%

CIN: TAIYO YUDEN JMK107BJ105

COUT1: TAIYO YUDEN EMK212BJ474

COUT2: TAIYO YUDEN EMK212BJ105

L1, L2: MURATA LQH32CN150K53

R2

64.9k

34661 TA01a

LT3466-1

Efficiency vs Load Current

90

4 LEDs/20mA

VOUT2 = 12V

85

VIN = 5V

80

VIN = 3V

75

70

65

60

0

10 20 30 40 50 60

LOAD CURRENT (mA)

34661 TA01b

Li-Ion Powered Driver for 6 White LEDs and OLED Display

3V TO 5V

L1

33µH

L2

1µF

33µH

SW1

VIN

SW2

6 LEDs

COUT1

1µF

VOUT1 LT3466-1

FB1

CTRL1

RT GND

RFB1

10Ω

SHUTDOWN 63.4k

AND DIMMING

CONTROL 1

CIN: TAIYO YUDEN JMK107BJ105

COUT1, COUT2: TAIYO YUDEN GMK316BJ105

L1, L2: 33µH TOKO D52LC

VOUT2

FB2

COUT2

1µF

16V

30mA

R1

475k

CTRL2

SHUTDOWN

AND DIMMING

CONTROL 2

R2

24.9k

34661 TA02a

Conversion Efficiency

90

85

LED DRIVER

80

BOOST CONVERTER

75

70

65

60

VIN = 3.6V

55 6 LEDs

VOUT2 = 16V

50

0

5 10 15 20 25 30

OUTPUT CURRENT (mA)

34661 TA02b

34661f

15

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