Datasheet Linear Technology LTC3490

Manufacturer	Linear Technology
Series	LTC3490

Single Cell 350mA LED Driver

Datasheets

PDF, 168 Kb, Revision: A, File uploaded: Oct 4, 2017

Extract from the document

Prices

Packaging

	LTC3490EDD#PBF	LTC3490EDD#TRPBF	LTC3490ES8#PBF	LTC3490ES8#TRPBF
N	1	2	3	4
Package	3x3 DFN-8 Package Outline Drawing	3x3 DFN-8 Package Outline Drawing	SO-8 Package Outline Drawing	SO-8 Package Outline Drawing
Package Code	DD	DD	S8	S8
Package Index	05-08-1698	05-08-1698	05-08-1610 (S8)	05-08-1610 (S8)
Pin Count	8	8	8	8

Parametrics

Parameters / Models	LTC3490EDD#PBF	LTC3490EDD#TRPBF	LTC3490ES8#PBF	LTC3490ES8#TRPBF
Architecture	Average Output Current Control	Average Output Current Control	Average Output Current Control	Average Output Current Control
Demo Boards	DC762A	DC762A	DC762A	DC762A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Dimming	PWM	PWM	PWM	PWM
Export Control	no	no	no	no
Frequency, kHz	1300	1300	1300	1300
Ishutdown, µA	20	20	20	20
Isupply, mA	20	20	20	20
Max Number of LEDs	2	2	2	2
Monolithic	yes	yes	yes	yes
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85
Switch Current, A	2	2	2	2
Synchronous	no	no	no	no
Topology	Boost, LED Driver	Boost, LED Driver	Boost, LED Driver	Boost, LED Driver
Vin Max, V	3.2	3.2	3.2	3.2
Vin Min, V	1	1	1	1
Vout Max, V	4	4	4	4

Eco Plan

	LTC3490EDD#PBF	LTC3490EDD#TRPBF	LTC3490ES8#PBF	LTC3490ES8#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Articles

Download
Simple Converter Drives Luxeon White LEDs from Batteries &mdash LT Journal
PDF, 189 Kb, File published: Jun 10, 2005
Extract from the document
DESIGN IDEAS Simple Converter Drives Luxeon
White LEDs from Batteries by Michael Nootbaar
Introduction current drive. Existing boost circuits
generally use voltage feedback switching converters with extra circuitry to The high output 1W white LEDs from
Luxeon and Nichia provide illumination levels close to 12W incandescent
levels while dissipating only 1W and
lasting for 50,000 hours or more. These
devices promise enormous power savings and reduced maintenance cost
for many lamp applications. However,
these LEDs must be driven with a
constant current to maintain proper
brightness. The forward voltage drop
varies between 2.8V and 4.0V over
process and temperature extremes.
The circuit used to drive the LED must
compensate for this forward voltage
variation while maintaining constant The LTC3490 provides a
simple solution for boosting
a single or dual cell battery
voltage to the necessary
LED forward voltage and
regulating the current
through the LED load. …

Model Line

Series: LTC3490 (4)

LTC3490EDD#PBF LTC3490EDD#TRPBF LTC3490ES8#PBF LTC3490ES8#TRPBF

Manufacturer's Classification

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

EMS supplier

Slices

Microcontrollers