LT3519

量产

具集成肖特基二极管的 LED 驱动器

数据手册 产品选型表
产品模型
12
产品技术资料帮助

ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许，也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。
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产品详情

  • 高达 3000:1 的 True Color PWM™ 调光
  • 宽输入电压范围：
    • 工作时为 3V 至 30V
    • 瞬变保护至 40V
  • 轨至轨 LED 电流检测从 0V 至 45V
  • 45V、750mA 内部开关
  • 内部肖特基二极管
  • 恒定电流和恒定电压调节
  • 升压、SEPIC、降压-升压模式、或降压模式拓扑结构
  • 开路 LED 保护和开路 LED 状态引脚
  • 具迟滞的可编程欠压闭锁
  • 固定频率：400kHz (LT3519)、1MHz (LT3519-1)、2.2MHz (LT3519-2)
  • 内部补偿
  • CTRL 引脚提供了模拟调光功能
  • 低停机电流：<1μA
  • 16 引脚 MSOP 封装

 
LT3519
具集成肖特基二极管的 LED 驱动器
4W Boost Automotive LED Driver LED Current vs VIN Product Package 1
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参考资料

数据手册 1

可靠性数据 1

用户手册 2

技术文章 2

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软件资源

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硬件生态系统

部分模型 产品周期 描述
TimerBlox 1
LTC6992-1
量产 TimerBlox : 电压控制型脉宽调制器 (PWM)
多通道电压输出数模转换器 1
LTC2657
量产 具 10ppm/ºC 最大值基准的八通道 I2C 16 位轨至轨 DAC
浪涌抑制器、过压和过流保护 1
LT4363
推荐新设计使用 具电流限制功能的高电压浪涌抑制器
模拟温度传感器 1
LTC2997
量产 远程 / 内部温度传感器
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工具及仿真模型

LTspice 4

LTspice中提供以下器件型号：

  • LT3519
  • LT3519-1
  • LT3519-2
LTspice

LTspice®是一款强大高效的免费仿真软件、原理图采集和波形观测器，为改善模拟电路的仿真提供增强功能和模型。

评估套件

eval board
schematic 1
DC1612A-B

LT3519EMS-2 Demo Board | SEPIC LED Driver, 2.2MHz fSW, 6V ≤ VIN ≤ 24V, VLED = 16V @ 150mA

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产品详情

Demonstration Circuit 1612A is a fully integrated LED driver with 750mA switch current featuring the LT3519-1 (1MHz switching) and the LT3519-2 (2.2MHz switching). The multitopology LT3519 operates with an input voltage up to 30V (40V transients) but the demo board has open LED protection set at 18V. The board is optimized to drive an LED string of up to 16V at 150mA in a SEPIC topology. The demo board operates from a 6V to 24V input voltage range.


LT3519 features in a low-side integrated 45V 750mA power switch, integrated catch diode, integrated compensation, 3000:1 PWM dimming ratio, overvoltage protection, shutdown control pin and analog LED current dimming control.

eval board
schematic 2
DC1612A-A

LT3519EMS-1 Demo Board | SEPIC LED Driver, 1MHz fSW, 6V ≤ VIN ≤ 24V, VLED = 16V @ 150mA

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产品详情

Demonstration Circuit 1612A is a fully integrated LED driver with 750mA switch current featuring the LT3519-1 (1MHz switching) and the LT3519-2 (2.2MHz switching). The multitopology LT3519 operates with an input voltage up to 30V (40V transients) but the demo board has open LED protection set at 18V. The board is optimized to drive an LED string of up to 16V at 150mA in a SEPIC topology. The demo board operates from a 6V to 24V input voltage range.


LT3519 features in a low-side integrated 45V 750mA power switch, integrated catch diode, integrated compensation, 3000:1 PWM dimming ratio, overvoltage protection, shutdown control pin and analog LED current dimming control.

eval board
schematic 3
DC1482A

LT3519EMS Demo Board | Boost LED Driver with Integrated Schottky Diode, 6V ≤ VIN ≤ 30V, VLED = 38V @ 100mA

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产品详情

Demonstration Circuit 1482 is a fully integrated, multitopology LED driver with a 45V, 750mA power switch featuring the LT3519. The board is optimized to drive a 100mA LED string from a 6V to 30V input power supply using a boost topology.The DC1482 has overvoltage protection at just above 40V if the LEDs are open or not properly attached to the terminals on the PCB.


The high input voltage range, integrated low-side power switch and catch diode, integrated compensation, low voltage floating current sense amplifier, high PWM dimming ratio, overvoltage protection, shutdown control pin, analog LED current dimming control, and fixed 400kHz switching frequency make the LT3519 an extremely versatile and powerful LED driving IC. 
DC1612A-B
LT3519EMS-2 Demo Board | SEPIC LED Driver, 2.2MHz fSW, 6V ≤ VIN ≤ 24V, VLED = 16V @ 150mA
DC1612A-A - Schematic
DC1612A-A
LT3519EMS-1 Demo Board | SEPIC LED Driver, 1MHz fSW, 6V ≤ VIN ≤ 24V, VLED = 16V @ 150mA
DC1612A-A - Schematic
DC1482A
LT3519EMS Demo Board | Boost LED Driver with Integrated Schottky Diode, 6V ≤ VIN ≤ 30V, VLED = 38V @ 100mA
DC1482A - Schematic

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