Datasheet Linear Technology LT3598

Manufacturer	Linear Technology
Series	LT3598

6-String 30mA LED Driver with ±1.5% Current Matching

Datasheets

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PDF, 412 Kb, Revision: B, File uploaded: Oct 4, 2017

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Packaging

	LT3598EFE#PBF	LT3598EFE#TRPBF	LT3598EUF#PBF	LT3598EUF#TRPBF	LT3598IFE#PBF	LT3598IFE#TRPBF	LT3598IUF#PBF	LT3598IUF#TRPBF
N	1	2	3	4	5	6	7	8
Package	TSSOP-24 Package Outline Drawing	TSSOP-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing	TSSOP-24 Package Outline Drawing	TSSOP-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing	4x4 QFN-24 Package Outline Drawing
Package Code	FE	FE	UF	UF	FE	FE	UF	UF
Package Index	05-08-1771	05-08-1771	05-08-1697	05-08-1697	05-08-1771	05-08-1771	05-08-1697	05-08-1697
Pin Count	24	24	24	24	24	24	24	24

Parametrics

Parameters / Models	LT3598EFE#PBF	LT3598EFE#TRPBF	LT3598EUF#PBF	LT3598EUF#TRPBF	LT3598IFE#PBF	LT3598IFE#TRPBF	LT3598IUF#PBF	LT3598IUF#TRPBF
Architecture	Independently Controlled Individual Current Sinks	Independently Controlled Individual Current Sinks	Independently Controlled Individual Current Sinks	Independently Controlled Individual Current Sinks	Independently Controlled Individual Current Sinks	Independently Controlled Individual Current Sinks	Independently Controlled Individual Current Sinks	Independently Controlled Individual Current Sinks
Demo Boards	DC1285A	DC1285A	DC1285A	DC1285A	DC1285A	DC1285A	DC1285A	DC1285A
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, Output Disconnect, Open LED Detection, Resistor Set Frequency	True Color PWM Dimming, Output Disconnect, Open LED Detection, Resistor Set Frequency	True Color PWM Dimming, Output Disconnect, Open LED Detection, Resistor Set Frequency	True Color PWM Dimming, Output Disconnect, Open LED Detection, Resistor Set Frequency	True Color PWM Dimming, Output Disconnect, Open LED Detection, Resistor Set Frequency	True Color PWM Dimming, Output Disconnect, Open LED Detection, Resistor Set Frequency	True Color PWM Dimming, Output Disconnect, Open LED Detection, Resistor Set Frequency	True Color PWM Dimming, Output Disconnect, Open LED Detection, Resistor Set Frequency
Frequency, kHz	2500	2500	2500	2500	2500	2500	2500	2500
Isupply, mA	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5
Max Number of LEDs	6 x 10	6 x 10	6 x 10	6 x 10	6 x 10	6 x 10	6 x 10	6 x 10
Monolithic	yes	yes	yes	yes	yes	yes	yes	yes
Number of Outputs	6	6	6	6	6	6	6	6
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
Switch Current, A	0.33	0.33	0.33	0.33	0.33	0.33	0.33	0.33
Synchronous	no	no	no	no	no	no	no	no
Topology	Boost, Sepic, LED Driver	Boost, Sepic, LED Driver	Boost, Sepic, LED Driver	Boost, Sepic, LED Driver	Boost, Sepic, LED Driver	Boost, Sepic, LED Driver	Boost, Sepic, LED Driver	Boost, Sepic, LED Driver
Vin Max, V	30	30	30	30	30	30	30	30
Vin Min, V	3.2	3.2	3.2	3.2	3.2	3.2	3.2	3.2
Vout Max, V	44	44	44	44	44	44	44	44

Eco Plan

	LT3598EFE#PBF	LT3598EFE#TRPBF	LT3598EUF#PBF	LT3598EUF#TRPBF	LT3598IFE#PBF	LT3598IFE#TRPBF	LT3598IUF#PBF	LT3598IUF#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

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Reduce the Cost and Complexity of Medium LCD LED Backlights with a Single Inductor LED Driver for 60 LEDs &mdash DN462
PDF, 95 Kb, File published: Mar 4, 2009
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Reduce the Cost and Complexity of Medium LCD LED
Backlights with a Single Inductor LED Driver for 60 LEDs
Design Note 462
Daniel Chen
Introduction
One inductor, one IC, one string of LEDs. This is the
conventional way to build a boost LED driver for LCD
display backlights. Although this is a perfectly acceptable solution for small LCD displays that only require a
few strings, in larger displays the number of control ICs
and inductors multiplies quickly, as do the expenses and
PCB real estate requirements. This is a major hurdle in
the race to replace CCFLs with robust, spectrally superior
LEDs in medium sized, bright displays.
A better driver is needed to bring the cost and complexity of LED backlights in line with CCFLs. The LT3598
answers the call by driving six strings of ten LEDs at up
to 30mA per string. It also has a built-in power switch
to save space and design time. Efп¬Ѓciency is optimized
via an adaptive feedback loop that monitors all LED pin
voltages to provide an output voltage just high enough
to light all LED strings. The LED current is regulated even
when VIN is greater than VOUT . The LED current can be
derated based on programmed LED temperature through
an NTC resistor divider or by programming die junction …

Model Line

Series: LT3598 (8)

LT3598EFE#PBF LT3598EFE#TRPBF LT3598EUF#PBF LT3598EUF#TRPBF LT3598IFE#PBF LT3598IFE#TRPBF LT3598IUF#PBF LT3598IUF#TRPBF

Manufacturer's Classification

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