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ПроизводительLinear Technology

60V High Current Step-Down LED Driver Controller


  • Скачать » Datasheet, PDF, 404 Кб, Версия: B, Файл закачен 19-09-2017
    LT3763 - 60V High Current Step-Down LED Driver Controller
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    60V High Current
    Step-Down LED Driver Controller
    Description Features n n n n n n n n n n Accurately Control Input and Output Current
    3000:1 True Color PWMв„ў Dimming
    В±1.5% Voltage Regulation Accuracy
    В±6% Current Regulation Accuracy
    6V to 60V Input Voltage Range
    Wide Output Range Up to 55V 2V, VSS = VFBIN = 2V, VC = 1.2V SENSE+ Pin Current VSENSE+ = VSENSE– = 4V SENSE– Pin Current VSENSE +=V SENSE – = 4V, V CTRL1 = 1.5V mV –20 µA –40 µA Internal VCC Regulator (INTVCC Pin)
    Regulation Voltage ILOAD = 10mA Current Limit VINTVCC = 0V l 4.8 5 5.2 V 60 mA 42 ns 44 ns 50 ns NMOS FET Driver
    Non-Overlap Time TG to BG
    Non-Overlap Time BG to TG
    Minimum On-Time BG (Note 4) Minimum On-Time TG (Note 4) 55 ns Minimum Off-Time BG (Note 4) 140 ns High Side Driver Switch On-Resistance Gate Pull-Up Gate Pull-Down VCBOOST – VSW = 5V 2.2
    1.3 О©
    О© Low Side Driver Switch On-Resistance Gate Pull-Up Gate Pull-Down VINTVCC = 5V 2.2
    1 О©
    О© Switching Frequency RT = 40kО©
    RT = 221kО© l 930
    180 1000
    200 1070
    220 kHz
    kHz Soft-Start
    Charging Current 11 ВµA 750 nA Voltage Regulation Amplifier ...


Корпус / Упаковка / Маркировка

Код корпусаFE
Индекс корпуса05-08-1663 (EB)


АрхитектураConstant Frequency Current Mode
Demo BoardsDC1831A
Design ToolsLTspice File
Dimming3000:1 PWM
Экспортный контрольнет
Основные особенностиTrue Color PWM Dimming, Resistor Set Frequency, External Synchronization, Output Current Regulation
Тактовая частота1000 kHz
Ishutdown0.2 мкА
Isupply1.7 мА
Max Number of LEDs25+
Количество выходов1
Рабочий диапазон температурот -40 до 85 °C
Выходной ток20 A
Switch Current20 A
TopologyBuck, LED Driver
Vin Max60 В
Vin Min6 В
Vout Max55 В

Экологический статус


Design Notes

  • Скачать » Design Notes - DN508, PDF, 617 Кб, 09-10-2012
    60V, Synchronous Step-Down High Current LED Driver
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    60V, Synchronous Step-Down High Current LED Driver
    Design Note 508
    Hua (Walker) Bai
    The meaning of the term “high power LED” is rapidly
    evolving. Although a 350mA LED could easily earn the
    stamp of “high power” a few years ago, it could not
    hold a candle to the 20A LED or the 40A laser diodes of
    today. High power LEDs are now used in DLP projectors,
    surgical equipment, stage lighting, automotive lighting
    and other applications traditionally served by high
    intensity bulbs. To meet the light output requirements
    of these applications, high power LEDs are often used
    in series. The problem is that several series-connected
    LEDs require a high voltage LED driver circuit. LED driver
    design is further complicated by applications that require
    fast LED current response to PWM dimming signals. 1) An output voltage regulation loop enables constant
    output voltage operation. This can be used to provide
    open LED protection or charging termination for a
    battery charger.
    2) A second current regulation loop can be used to set
    an input current limit.
    3) An input voltage regulation loop can be used for ...


  • Скачать » Статьи - LT Journal, PDF, 3.0 Мб, 10-04-2013
    High Power Controller Drives High Power LEDs, Regulates Solar Cells, and Charges Batteries, Steps Down 60V Inputs
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    High Power Controller Drives High Power LEDs,
    Regulates Solar Cells, and Charges Batteries,
    Steps Down 60V Inputs
    Luke Milner The best LED drivers accurately regulate LED current for consistent color reproduction
    and modulate it rapidly for high contrast dimming. They also recognize and
    survive short and open circuits, monitor and report current levels, guard against
    overheating, and protect weak power supplies from excessive load currents. A
    standard switching converter would require a number of additional expensive
    amplifiers, references and passive components to fulfill these responsibilities.
    In contrast, the LT®3763 LED driver-controller has these functions built in—reducing BOM costs, saving board space and
    improving reliability. The LT3763 is more
    than just a high performance LED driver.
    Its rich feature set simplifies the design of
    other demanding applications, such as safe
    charging of a sealed lead-acid batteries, or
    maximum power point regulation for a
    solar panel, or a combination of both. The
    LT3763 performs these tasks with high efficiency, even at input voltages reaching 60V. prevent overshoot and pulls down the
    FAULT pin to mark the occasion.
    The LT3763 is designed to provide flickerfree LED dimming as shown in Figure 2.
    This is achieved by pulling PWMOUT low
    whenever PWM is low and thereby disconnecting the LED, by similarly disconnecting the compensation network at VC , and
    resynchronizing internal switching clocks ...

Модельный ряд

Серия: LT3763 (6)

Классификация производителя

  • Power Management > Switching Regulator > Step-Down (Buck) Regulators > High Input Voltage Buck | External Power Switch Buck Controllers
  • Power Management > LED Driver ICs > Step-Down (Buck) LED Drivers
  • Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) LED Drivers

Варианты написания:


На английском языке: Datasheet Linear Technology LT3763IFE#TRPBF

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