Datasheet Linear Technology LT3478

Manufacturer	Linear Technology
Series	LT3478

4.5A Monolithic LED Drivers with True Color PWM Dimming

Datasheets

Preview and Download

PDF, 295 Kb, Language: en, File uploaded: Oct 4, 2017, Pages: 24
4.5A Monolithic LED Drivers with True Color PWM Dimming

Extract from the document

Packaging

	LT3478EFE#PBF	LT3478EFE#TRPBF	LT3478EFE-1#PBF	LT3478EFE-1#TRPBF	LT3478IFE#PBF	LT3478IFE#TRPBF	LT3478IFE-1#PBF	LT3478IFE-1#TRPBF
N	1	2	3	4	5	6	7	8
Package	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing
Package Code	FE	FE	FE	FE	FE	FE	FE	FE
Package Index	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)
Pin Count	16	16	16	16	16	16	16	16

Parametrics

Parameters / Models	LT3478EFE#PBF	LT3478EFE#TRPBF	LT3478EFE-1#PBF	LT3478EFE-1#TRPBF	LT3478IFE#PBF	LT3478IFE#TRPBF	LT3478IFE-1#PBF	LT3478IFE-1#TRPBF
Architecture	Improved Average Output Current Control	Improved Average Output Current Control	Improved Average Output Current Control	Improved Average Output Current Control	Improved Average Output Current Control	Improved Average Output Current Control	Improved Average Output Current Control	Improved Average Output Current Control
Demo Boards	DC949A-A,DC949A-B	DC949A-A,DC949A-B	DC949A-A,DC949A-B	DC949A-A,DC949A-B	DC949A-A,DC949A-B	DC949A-A,DC949A-B	DC949A-A,DC949A-B	DC949A-A,DC949A-B
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Dimming	3000:1 PWM, 10:1 Analog	3000:1 PWM, 10:1 Analog	3000:1 PWM, 10:1 Analog	3000:1 PWM, 10:1 Analog	3000:1 PWM, 10:1 Analog	3000:1 PWM, 10:1 Analog	3000:1 PWM, 10:1 Analog	3000:1 PWM, 10:1 Analog
Export Control	no	no	no	no	no	no	no	no
Features	True Color PWM Dimming, Open LED Protection, Resistor Set Frequency	True Color PWM Dimming, Open LED Protection, Resistor Set Frequency	True Color PWM Dimming, Open LED Protection, Resistor Set Frequency	True Color PWM Dimming, Open LED Protection, Resistor Set Frequency	True Color PWM Dimming, Open LED Protection, Resistor Set Frequency	True Color PWM Dimming, Open LED Protection, Resistor Set Frequency	True Color PWM Dimming, Open LED Protection, Resistor Set Frequency	True Color PWM Dimming, Open LED Protection, Resistor Set Frequency
Frequency, kHz	2250	2250	2250	2250	2250	2250	2250	2250
Ishutdown, µA	3	3	3	3	3	3	3	3
Isupply, mA	6.1	6.1	6.1	6.1	6.1	6.1	6.1	6.1
Max Number of LEDs	10	10	10	10	10	10	10	10
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Output Current, A	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.2
Switch Current, A	6.3	6.3	6.3	6.3	6.3	6.3	6.3	6.3
Synchronous	no	no	no	no	no	no	no	no
Topology	Boost, Buck-Boost, Buck, LED Driver	Boost, Buck-Boost, Buck, LED Driver	Boost, Buck-Boost, Buck, LED Driver	Boost, Buck-Boost, Buck, LED Driver	Boost, Buck-Boost, Buck, LED Driver	Boost, Buck-Boost, Buck, LED Driver	Boost, Buck-Boost, Buck, LED Driver	Boost, Buck-Boost, Buck, LED Driver
Vin Max, V	36	36	36	36	36	36	36	36
Vin Min, V	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8
Vout Max, V	42	42	42	42	42	42	42	42

Eco Plan

	LT3478EFE#PBF	LT3478EFE#TRPBF	LT3478EFE-1#PBF	LT3478EFE-1#TRPBF	LT3478IFE#PBF	LT3478IFE#TRPBF	LT3478IFE-1#PBF	LT3478IFE-1#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Articles

Download
4.5A Monolithic LED Drivers with 3000:1 Dimming are Ideal for a Wide Range of High Power LED Applications &mdash LT Journal
PDF, 304 Kb, File published: Jun 14, 2007
Extract from the document
DESIGN FEATURESвЂ‰L 4.5A Monolithic LED Drivers with
3000:1 Dimming are Ideal for
a Wide Range of High Power
LED Applications
by Mark W. Marosek
Introduction The LT3478 and LT3478-1 are monolithic step-up DC/DC converters
specifically designed to drive high
brightness LEDs with a constant current over a wide programmable range.
They are extremely easy to use and
include programmable features for
optimizing performance, reliability,
size and overall solution cost. These
devices can operate in boost, buckmode boost and buck-boost mode
LED driver topologies. Depending on
the topology, they can provide up to
4A of LED current, a level unmatched
by other monolithic LED drivers. The
LT3478 and LT3478-1 are ideal for
high power LED applications, including automotive and avionic lighting,
and are available in a 16-pin thermally enhanced TSSOP package with
either E-grade or I-grade temperature
ratings.
The LT3478 and LT3478-1 operate similarly to conventional current mode boost converters, but use LED …

Model Line

Series: LT3478 (8)

LT3478EFE#PBF LT3478EFE#TRPBF LT3478EFE-1#PBF LT3478EFE-1#TRPBF LT3478IFE#PBF LT3478IFE#TRPBF LT3478IFE-1#PBF LT3478IFE-1#TRPBF

Manufacturer's Classification

Power Management > LED Driver ICs > Step-Up (Boost) LED Drivers | Step-Down (Buck) LED Drivers | Buck-Boost LED Drivers | Multitopology LED Driver