lt3466efe-trpbf Linear Technology Corporation, lt3466efe-trpbf Datasheet

lt3466efe-trpbf

Manufacturer Part Number

lt3466efe-trpbf

Description

White Led Driver And Boost Converter In 3mm X 3mm Dfn Package

Manufacturer

Linear Technology Corporation

Datasheet

1.LT3466EFE-TRPBF.pdf (20 pages)

Current page: 1 of 20
Download datasheet (405Kb)

FEATURES

TYPICAL APPLICATIO

APPLICATIO S

■

Drives Up to 10 White LEDs from a 3.6V Supply

Two Independent Step-Up DC/DC Converters

Independent Dimming and Shutdown Control

of the Outputs

±1.5% Output Voltage Accuracy (Boost Converter)

±4% LED Current Programming Accuracy

Internal Schottky Diodes

Internal Soft-Start Eliminates Inrush Current

Output Overvoltage Protection (39.5V Max V

Fixed Frequency Operation Up to 2MHz

83% Efficiency Driving 8 White LEDs at 15mA

from a 3.6V Supply

Wide Input Voltage Range: 2.7V to 24V

Tiny (3mm × 3mm) 10-Lead DFN Package

White LED and OLED Displays

Digital Cameras, Sub-Notebook PCs

PDAs, Handheld Computers

TFT - LCD Bias Supply

Automotive

Figure 1. Li-Ion Powered Driver for 6 White LEDs and OLED Display

6 LEDs

10Ω

1µF

AND DIMMING

SHUTDOWN

CONTROL 1

FB1

CTRL1

SW1

OUT1

33µH

63.4k

3V TO 5V

LT3466-1

GND

33µH

SHUTDOWN

AND DIMMING

CONTROL 2

CTRL2

SW2

OUT2

FB2

1µF

OUT

1µF

)

475k

24.9k

34661 F01a

16V

30mA

DESCRIPTIO

white LED driver and a boost converter in a low profile,

small footprint (3mm × 3mm × 0.75mm) DFN package.

The LED driver can be configured to drive up to 10 White

LEDs in series and the boost converter can be used for

generating the LCD bias voltages or driving a secondary

OLED display. Series connection of the LEDs provides

identical LED currents resulting in uniform brightness and

eliminating the need for ballast resistors and expensive

factory calibration.

The LT3466-1 provides independent dimming and shut-

down control of the two converters. The operating fre-

quency can be set with an external resistor over a 200kHz

to 2MHz range. The white LED driver features a low 200mV

reference, thereby minimizing power loss in the current

setting resistor for better efficiency. The boost converter

achieves ±1.5% output voltage accuracy by the use of a

precision 0.8V reference. Protection features include out-

put overvoltage protection and internal soft-start. Wide

input supply range allows operation from 2.7V to 24V.

All other trademarks are the property of their respective owners.

, LTC and LT are registered trademarks of Linear Technology Corporation.

3466-1 is a dual switching regulator that combines a

White LED Driver and Boost

Converter in 3mm × 3mm

LED DRIVER

= 3.6V

Conversion Efficiency

OUTPUT CURRENT (mA)

BOOST CONVERTER

DFN Package

LT3466-1

34661 F01b

34661f

Related parts for lt3466efe-trpbf

Related keywords

lt3466efe-trpbf datasheet
lt3466efe-trpbf data sheet
lt3466efe-trpbf pdf datasheet
lt3466efe-trpbf component
lt3466efe-trpbf part
lt3466efe-trpbf distributor
lt3466efe-trpbf RoHS
lt3466efe-trpbf datasheet download