Datasheet Linear Technology LT3477EFE#TRPBF — Даташит

Производитель	Linear Technology
Серия	LT3477
Модель	LT3477EFE#TRPBF

Преобразователь постоянного тока в постоянный ток, 3 А, с двойным датчиком тока между шинами (Rail-to-Rail)

Datasheets

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PDF, 585 Кб, Язык: анг., Файл закачен: 18 сен 2017, Страниц: 22
3A, DC/DC Converter with Dual Rail-to-Rail Current Sense

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Цены

Купить LT3477EFE#TRPBF на РадиоЛоцман.Цены — от 147 до 1 023 ₽ 29 предложений от 14 поставщиков IC LED DRVR RGLTR DIM 3A 20TSSOP / LED Driver 4 Segment 7500uA Supply Current 20-Pin TSSOP EP T/R
ChipWorker Весь мир	LT3477EFE#TRPBF Analog Devices	156 ₽
ЭИК Россия	LT3477EFE#TRPBF Analog Devices	от 997 ₽
Компонентс Ру Россия	LT3477EFE#TRPBF Analog Devices	от 1 023 ₽
Кремний Россия и страны СНГ	LT3477EFE TRPBF Linear Technology	по запросу

Корпус / Упаковка / Маркировка

Корпус	TSSOP-20
Код корпуса	FE
Индекс корпуса	05-08-1663 (CB)

Параметры

Архитектура	Average Output Current Control
Demo Boards	DC1130A,DC841A
Design Tools	LTspice File
Dimming	500:1 PWM, 10:1 Analog
Экспортный контроль	нет
Основные особенности	Output Current Regulation, Resistor Set Frequency, Differential Remote Sense
Тактовая частота	3500 kHz
Ishutdown	0.1 мкА
Isupply	5 мА
Max Number of LEDs	12
Monolithic	да
Количество выходов	1
Рабочий диапазон температур	от 0 до 85 °C
Выходной ток	2.66 A
Switch Current	4 A
Synchronous	нет
Topology	Buck, Boost, Buck-Boost, LED Driver
Vin Max	25 В
Vin Min	2.3 В
Vout Max	40 В

Экологический статус

RoHS

Совместим

Design Notes

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Monolithic Converter Drives High Power LEDs &mdash DN376
PDF, 77 Кб, Файл опубликован: 19 сен 2005
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Monolithic Converter Drives High Power LEDs вЂ“ Design Note 376
Keith Szolusha
Introduction
High power LEDs are quickly expanding their reach as
the light source of choice for п¬‚at panel computer and
TV monitors, TV projection, signage, portable lights
and automotive interior, trim and brake lighting. The
input voltage and LED voltage combinations across
these applications are as diverse as the applications
themselves, precluding the ability for a single topology
to satisfy the needs of them all. Nevertheless, all LED
drivers, whether buck, boost, buck-boost or SEPIC must
regulate a constant LED current, regardless of input and
output voltages. Now a single switching regulator with
the ability to be conп¬Ѓgured in a large variety of topologies for high power constant LED current is available. Efп¬Ѓciencies of up to 91% can be achieved in typical
applications. The LT3477 features a programmable
soft-start function to limit inductor current during
start-up. Both inputs of the error ampliп¬Ѓer are available externally, allowing positive and negative output
voltages. The switching frequency is programmable
from 200kHz to 3.5MHz through an external resistor.
It comes in two thermally enhanced packages: a 20-pin
(4mm Г— 4mm) QFN and a 20-pin TSSOP.
Boost Driver …

Статьи

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Constant Current from 3A DC/DC Converter with 2 Rail-to-Rail Current Sense Amplifiers &mdash LT Journal
PDF, 201 Кб, Файл опубликован: 28 мар 2006
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DESIGN FEATURES Constant Current from 3A DC/DC
Converter with 2 Rail-to-Rail
by Daniel Chen
Current Sense Ampliп¬Ѓers
Introduction
Traditional DC/DC converters use
voltage feedback for constant output
voltage regulation. There are many
applications, however, that need to
regulate a constant output current.
Driving LEDs in series is one such
application. The LT3477 combines a
traditional voltage feedback loop and
two unique current feedback loops
to operate as a constant-current,
constant-voltage source. It is a current mode, 3A DC/DC converter with
dual rail-to-rail 100mV current sense
ampliп¬Ѓers that can be conп¬Ѓgured as a
buck mode or buck-boost mode LED
driver. It is versatile enough to also be
conп¬Ѓgured as an input-output current limited boost, SEPIC or inverting
converter. Both current sense voltages
can be adjusted independently using …
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3A Converter Drives LEDs with 500:1 Dimming &mdash LT Journal
PDF, 289 Кб, Файл опубликован: 28 мар 2006
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DESIGN IDEAS L 3A Converter Drives LEDs
with 500:1 Dimming by Jaino Parasseril Introduction DESIGN IDEAS
3A Converter Drives LEDs
with 500:1 Dimming .37
Jaino Parasseril 40nVPвЂ“P Noise, 0.05ВµV/В°C Drift,
Chopped FET Ampliп¬Ѓer .39
Jim Williams 100 VIN = 5V
4 LEDs
fPWM = 100Hz 10 1 0.1 0.1 10
1
PWM DUTY CYCLE (%) Save Board Space with a High
Efп¬Ѓciency Dual Synchronous,
400mA/800mA, 2.25MHz
Step-Down DC/DC Regulator .44
Damon Lee Linear Technology Magazine March 2006 Figure 3), resulting in a wide dimming
range of 500:1 at a PWM frequency
of 100Hz.
The LED current can be controlled
by feeding a PWM signal with a broad
range of frequencies. Dimming below
80Hz is possible but not desirable due
to perceptible п¬‚ashing of LEDs at lower
frequencies. The LED current can be …

Модельный ряд

Серия: LT3477 (8)

LT3477EFE#PBF LT3477EFE#TRPBF LT3477EUF#PBF LT3477EUF#TRPBF LT3477IFE#PBF LT3477IFE#TRPBF LT3477IUF#PBF LT3477IUF#TRPBF

Классификация производителя

Power Management > Switching Regulator > SEPIC Regulators
Power Management > Switching Regulator > Step-Up (Boost) Regulators > Internal Power Switch Boost
Power Management > LED Driver ICs > Step-Up (Boost) LED Drivers | Step-Down (Buck) LED Drivers | Buck-Boost LED Drivers | Multitopology LED Driver

Варианты написания:

LT3477EFETRPBF, LT3477EFE TRPBF