Datasheet Linear Technology LT3743

Manufacturer	Linear Technology
Series	LT3743

High Current Synchronous Step-Down LED Driver with Three-State Control

Datasheets

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PDF, 535 Kb, Language: en, File uploaded: Oct 4, 2017, Pages: 28
High Current Synchronous Step-Down LED Driver with Three-State Control

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Packaging

	LT3743EFE#PBF	LT3743EFE#TRPBF	LT3743EUFD#PBF	LT3743EUFD#TRPBF	LT3743IFE#PBF	LT3743IFE#TRPBF	LT3743IUFD#PBF	LT3743IUFD#TRPBF
N	1	2	3	4	5	6	7	8
Package	TSSOP-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing
Package Code	FE	FE	UFD	UFD	FE	FE	UFD	UFD
Package Index	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712
Pin Count	28	28	28	28	28	28	28	28

Parametrics

Parameters / Models	LT3743EFE#PBF	LT3743EFE#TRPBF	LT3743EUFD#PBF	LT3743EUFD#TRPBF	LT3743IFE#PBF	LT3743IFE#TRPBF	LT3743IUFD#PBF	LT3743IUFD#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	DC1470A	DC1470A	DC1470A	DC1470A	DC1470A	DC1470A	DC1470A	DC1470A
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	Open LED Protection	Open LED Protection	Open LED Protection	Open LED Protection	Open LED Protection	Open LED Protection	Open LED Protection	Open LED Protection
Frequency, kHz	1000	1000	1000	1000	1000	1000	1000	1000
Ishutdown, µA	.1	.1	.1	.1	.1	.1	.1	.1
Isupply, mA	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8
Max Number of LEDs	10	10	10	10	10	10	10	10
Monolithic	no	no	no	no	no	no	no	no
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	20	20	20	20	20	20	20	20
Switch Current, A	20	20	20	20	20	20	20	20
Synchronous	yes	yes	yes	yes	yes	yes	yes	yes
Topology	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver	Buck, LED Driver
Vin Max, V	36	36	36	36	36	36	36	36
Vin Min, V	6	6	6	6	6	6	6	6
Vout Max, V	30	30	30	30	30	30	30	30

Eco Plan

	LT3743EFE#PBF	LT3743EFE#TRPBF	LT3743EUFD#PBF	LT3743EUFD#TRPBF	LT3743IFE#PBF	LT3743IFE#TRPBF	LT3743IUFD#PBF	LT3743IUFD#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Articles

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High Current/High Speed LED Driver Revolutionizes PWM Dimming &mdash LT Journal
PDF, 522 Kb, File published: Dec 1, 2009
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LвЂ‰DESIGN FEATURES High Current/High Speed LED Driver
Revolutionizes PWM Dimming
by Josh Caldwell Introduction
Power drivers that can produce regulated high current pulses are used
in a number of lighting applications,
ranging from high current LEDs in
DLP projectors to high power laser
diodes. For instance, in high end
video projectors, high power LEDs are
used to produce color illumination.
The RGB LEDs in these projectors
require precise dimming control for
accurate color mixingвЂ”in this case,
more control than simple PWM dimming can offer. Typically, to achieve
the wide dynamic range required in
color mixing, LED drivers must be
able to rapidly switch between the
two disparate regulated peak current
states, and overlay PWM dimming
without disruption. The LT3743 has
the ability to meet these demanding
accuracy and speed requirements.
The LT3743 is a synchronous …

Model Line

Series: LT3743 (8)

LT3743EFE#PBF LT3743EFE#TRPBF LT3743EUFD#PBF LT3743EUFD#TRPBF LT3743IFE#PBF LT3743IFE#TRPBF LT3743IUFD#PBF LT3743IUFD#TRPBF

Manufacturer's Classification

Power Management > LED Driver ICs > Step-Down (Buck) LED Drivers