Datasheet Linear Technology LT3491

Manufacturer	Linear Technology
Series	LT3491

White LED Driver in SC70 with Integrated Schottky

Datasheets

PDF, 274 Kb, Revision: A, File uploaded: Oct 4, 2017

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Packaging

	LT3491EDC#PBF	LT3491EDC#TRMPBF	LT3491EDC#TRPBF	LT3491ESC8#PBF	LT3491ESC8#TRMPBF	LT3491ESC8#TRPBF
N	1	2	3	4	5	6
Package	2x2 DFN-6 Package Outline Drawing	2x2 DFN-6 Package Outline Drawing	2x2 DFN-6 Package Outline Drawing	SC-70 Package Outline Drawing	SC-70 Package Outline Drawing	SC-70 Package Outline Drawing
Package Code	DC6	DC6	DC6	SC8	SC8	SC8
Package Index	05-08-1703	05-08-1703	05-08-1703	05-08-1639	05-08-1639	05-08-1639
Pin Count	6	6	6	8	8	8

Parametrics

Parameters / Models	LT3491EDC#PBF	LT3491EDC#TRMPBF	LT3491EDC#TRPBF	LT3491ESC8#PBF	LT3491ESC8#TRMPBF	LT3491ESC8#TRPBF
Architecture	Average Output Current Control	Average Output Current Control	Average Output Current Control	Average Output Current Control	Average Output Current Control	Average Output Current Control
Demo Boards	DC905A	DC905A	DC905A	DC905A	DC905A	DC905A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Dimming	PWM, Analog	PWM, Analog	PWM, Analog	PWM, Analog	PWM, Analog	PWM, Analog
Export Control	no	no	no	no	no	no
Features	Integrated Schottky Diode, True Color PWM Dimming, High Side Current Sense	Integrated Schottky Diode, True Color PWM Dimming, High Side Current Sense	Integrated Schottky Diode, True Color PWM Dimming, High Side Current Sense	Integrated Schottky Diode, True Color PWM Dimming, High Side Current Sense	Integrated Schottky Diode, True Color PWM Dimming, High Side Current Sense	Integrated Schottky Diode, True Color PWM Dimming, High Side Current Sense
Frequency, kHz	2300	2300	2300	2300	2300	2300
Ishutdown, µA	8	8	8	8	8	8
Isupply, mA	2.6	2.6	2.6	2.6	2.6	2.6
Max Number of LEDs	6	6	6	6	6	6
Monolithic	yes	yes	yes	yes	yes	yes
Number of Outputs	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85	0 to 85
Switch Current, A	0.35	0.35	0.35	0.35	0.35	0.35
Synchronous	no	no	no	no	no	no
Topology	Boost, LED Driver	Boost, LED Driver	Boost, LED Driver	Boost, LED Driver	Boost, LED Driver	Boost, LED Driver
Vin Max, V	12	12	12	12	12	12
Vin Min, V	2.5	2.5	2.5	2.5	2.5	2.5
Vout Max, V	24	24	24	24	24	24

Eco Plan

	LT3491EDC#PBF	LT3491EDC#TRMPBF	LT3491EDC#TRPBF	LT3491ESC8#PBF	LT3491ESC8#TRMPBF	LT3491ESC8#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Articles

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Mar2006 SC70 LED Driver Drives Six White LEDs from a Single Li-Ion Battery &mdash LT Journal
PDF, 316 Kb, File published: Mar 28, 2006
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L DESIGN IDEAS SC70 LED Driver Drives Six White LEDs
from a Single Li-Ion Battery by Mayur Kenia
Introduction
The highly integrated LT3491 provides
a compact, simple solution for driving
backlight circuits in battery-powered
portable devices, such as cellular
phones, PDAs, and portable GPS
devices. It features internal compensation, open-LED protection, a 32V
power switch and a 32V Schottky diode
all inside a tiny SC70 package.
Speciп¬Ѓcally, the LT3491 is a п¬Ѓxed
frequency step-up DC/DC converter
that drives up to six white LEDs in
series from a Li-Ion cell. Series connection of the LEDs provides identical
LED currents resulting in uniform
brightness without the need for ballast resistors. In addition, the 2.3MHz
switching frequency allows the use of
tiny inductors and capacitors.
Figure 1 shows how easy it is to drive
six white LEDs from a Li-Ion battery.
Figure 2 shows the efп¬Ѓciency of the six
white LED application circuit. SHUTDOWN AND …

Model Line

Series: LT3491 (6)

LT3491EDC#PBF LT3491EDC#TRMPBF LT3491EDC#TRPBF LT3491ESC8#PBF LT3491ESC8#TRMPBF LT3491ESC8#TRPBF

Manufacturer's Classification

Power Management > LED Driver ICs > Step-Up (Boost) LED Drivers

Slices

Microcontrollers