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 

LT3466-1

ELECTRICAL CHARACTERISTICS The ● denotes specifications that apply over the full operating temperature

range, otherwise specifications are at TA = 25°C. VIN = 3V, VCTRL1 = 3V, VCTRL2 = 3V, unless otherwise specified.

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

VOUT1 Overvoltage Threshold

39.5

V

VOUT2 Overvoltage Threshold

Schottky 1 Forward Drop

ISCHOTTKY1 = 300mA

39.5

V

0.85

V

Schottky 2 Forward Drop

ISCHOTTKY2 = 300mA

0.85

V

Schottky 1 Reverse Leakage

VOUT1 = 20V

5

µA

Schottky 2 Reverse Leakage

Soft-Start Time (Switcher 1)

VOUT2 = 20V

5

µA

600

µs

Soft-Start Time (Switcher 2)

600

µs

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The LTC3466-1E is guaranteed to meet specified performance

from 0°C to 70°C. Specifications over the –40°C to 85°C operating range

are assured by design, characterization and correlation with statistical

process controls.

Note 3: Current flows out of the pin.

Note 4: Guaranteed by design and test correlation, not production tested.

TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise specified

Switching Waveforms

(LED Driver)

VOUT1

100mV/DIV

(AC-COUPLED)

VSW1

20V/DIV

IL1

100mA/DIV

VIN = 3.6V

0.5µs/DIV

6 LEDs AT 20mA

CIRCUIT OF FIGURE 1

34661 G01

Switching Waveforms

(Boost Converter)

VOUT2

100mV/DIV

(AC-COUPLED)

VSW2

20V/DIV

IL2

100mA/DIV

VIN = 3.6V

0.5µs/DIV

VOUT2 = 16V/30mA

CIRCUIT OF FIGURE 1

34661 G02

VFB1 vs VCTRL1

250 VIN = 3.6V

6 LEDs

200

150

100

50

0

0

0.5

1

1.5

2

VCTRL1 (V)

34661 G03

VFB2 vs VCTRL2

900 VIN = 3.6V

800 VOUT2 = 16V

700

600

500

400

300

200

100

0

0

0.5

1

VCTRL2 (V)

1.5

2

34661 G16

34661f

3

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