Datasheet Linear Technology LT3797 — Даташит

Производитель	Linear Technology
Серия	LT3797

Triple Output LED Driver Controller

Datasheets

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PDF, 451 Кб, Версия: B, Файл закачен: 4 окт 2017

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Цены

Купить LT3797 на РадиоЛоцман.Цены — от 214 до 4 746 ₽ 30 предложений от 13 поставщиков , LED Driver 750uA Supply Current Automotive 48-Pin LQFP EP Tray
AllElco Electronics Весь мир	LT3797ELXE#PBF Analog Devices	от 214 ₽
IC Home Весь мир	LT3797IUKG#TRPBF Analog Devices	716 ₽
ЭИК Россия	LT3797ELXE#PBF Analog Devices	от 1 446 ₽
Augswan Весь мир	LT3797EUKG#TRPBF Analog Devices	по запросу

Корпус / Упаковка / Маркировка

	LT3797ELXE#PBF	LT3797EUKG#PBF	LT3797EUKG#TRPBF	LT3797ILXE#PBF	LT3797IUKG#PBF	LT3797IUKG#TRPBF
N	1	2	3	4	5	6
Корпус	7mm x 7mm LQFP-48 Габаритный чертеж корпуса	7x8 QFN-52 Габаритный чертеж корпуса	7x8 QFN-52 Габаритный чертеж корпуса	7mm x 7mm LQFP-48 Габаритный чертеж корпуса	7x8 QFN-52 Габаритный чертеж корпуса	7x8 QFN-52 Габаритный чертеж корпуса
Код корпуса	LXE	UKG	UKG	LXE	UKG	UKG
Индекс корпуса	05-08-1927	05-08-1874	05-08-1874	05-08-1927	05-08-1874	05-08-1874
Количество выводов	48	52	52	48	52	52

Параметры

Parameters / Models	LT3797ELXE#PBF	LT3797EUKG#PBF	LT3797EUKG#TRPBF	LT3797ILXE#PBF	LT3797IUKG#PBF	LT3797IUKG#TRPBF
Архитектура	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC1784A,DC2218A,DC1784B	DC1784A,DC2218A,DC1784B	DC1784A,DC2218A,DC1784B	DC1784A,DC2218A,DC1784B	DC1784A,DC2218A,DC1784B	DC1784A,DC2218A,DC1784B
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Dimming	3000:1 PWM	3000:1 PWM	3000:1 PWM	3000:1 PWM	3000:1 PWM	3000:1 PWM
Экспортный контроль	нет	нет	нет	нет	нет	нет
Основные особенности	Rail-to-Rail Current Sense, Open LED Protection, Resistor Set Frequency, External Synchronization	Rail-to-Rail Current Sense, Open LED Protection, Resistor Set Frequency, External Synchronization	Rail-to-Rail Current Sense, Open LED Protection, Resistor Set Frequency, External Synchronization	Rail-to-Rail Current Sense, Open LED Protection, Resistor Set Frequency, External Synchronization	Rail-to-Rail Current Sense, Open LED Protection, Resistor Set Frequency, External Synchronization	Rail-to-Rail Current Sense, Open LED Protection, Resistor Set Frequency, External Synchronization
Тактовая частота, kHz	1000	1000	1000	1000	1000	1000
Ishutdown, мкА	0.1	0.1	0.1	0.1	0.1	0.1
Isupply, мА	0.5	0.5	0.5	0.5	0.5	0.5
Max Number of LEDs	25+	25+	25+	25+	25+	25+
Monolithic	нет	нет	нет	нет	нет	нет
Количество выходов	3	3	3	3	3	3
Рабочий диапазон температур, °C	от 0 до 85	от 0 до 85	от 0 до 85	от -40 до 85	от -40 до 85	от -40 до 85
Выходной ток, A	5	5	5	5	5	5
Switch Current, A	20	20	20	20	20	20
Synchronous	нет	нет	нет	нет	нет	нет
Topology	Buck, Boost, Buck-Boost, Sepic, LED Driver	Buck, Boost, Buck-Boost, Sepic, LED Driver	Buck, Boost, Buck-Boost, Sepic, LED Driver	Buck, Boost, Buck-Boost, Sepic, LED Driver	Buck, Boost, Buck-Boost, Sepic, LED Driver	Buck, Boost, Buck-Boost, Sepic, LED Driver
Vin Max, В	40	40	40	40	40	40
Vin Min, В	2.5	2.5	2.5	2.5	2.5	2.5
Vout Max, В	100	100	100	100	100	100

Экологический статус

	LT3797ELXE#PBF	LT3797EUKG#PBF	LT3797EUKG#TRPBF	LT3797ILXE#PBF	LT3797IUKG#PBF	LT3797IUKG#TRPBF
RoHS	Совместим	Совместим	Совместим	Совместим	Совместим	Совместим

Статьи

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Boost-then-Buck LED Drivers Enable Wide PWM Dimming Range with Wide-Ranging Input Voltages (LT3797) &mdash LT Journal
PDF, 218 Кб, Файл опубликован: 9 апр 2014
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Boost-thenвЂ‘Buck LED Drivers Enable Wide PWM Dimming
Range with Wide-Ranging Input Voltages
Keith Szolusha and Taffy Wong Multichannel LED drivers are primarily designed to power
multiple LEDs or multiple LED strings, sometimes of different
colors or lengths, from a single IC. These drivers, however,
include a number of features that allow for other compelling
uses. The LT3797 3-channel LED driver, for instance, can
be configured to produce boost-then-buck capability with
one channel as a boost voltage preregulator while the other
two channels are configured as buck mode LED drivers.
When the input voltage source is wideranging and can be both above and below
the LED string rating, a buck-boost or
SEPIC topology is commonly used. These compared to buck-only converters, and
lower efficiency and higher conducted
EMI compared to boost-only regulators.
One way to avoid these problems is to
boost a wide-ranging input with a voltage preregulator and use that as the input
to a buck-only LED driver. This has the
advantages of step-up and step-down,
high PWM dimming bandwidth, and
lower conducted EMI. Since the LT3797
has three channels that can be used
for either voltage regulation or driving …

Модельный ряд

Серия: LT3797 (6)

LT3797ELXE#PBF LT3797EUKG#PBF LT3797EUKG#TRPBF LT3797ILXE#PBF LT3797IUKG#PBF LT3797IUKG#TRPBF

Классификация производителя

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