Input voltage (type) DC/DC Vin (Min) (V) 4.5 Vin (Max) (V) 65 Iout (Max) (A) 0.2 Vout (Min) (V) 5 Vout (Max) (V) 65 Regulated outputs (#) 2 Topology Boost, Boost with Current Sink, Multi-Channel Dimming method PWM Power factor correction (Min) Features Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Power Good, Soft Start, Thermal Shutdown Operating temperature range (C) -40 to 125 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 1000 Iq (Typ) (mA) 3.6 Vref (V) 1.25 open-in-new 查找其它 通用照明LED驱动器


HTSSOP (PWP) 20 42 mm² 6.5 x 6.4 open-in-new 查找其它 通用照明LED驱动器


  • Boost Converter:
    • LM3492-Q1 is an Automotive Grade Product That is AEC Q100 Grade 1 Qualified
    • Very Wide Input Voltage Ranged From 4.5 V to 65 V
    • Programmable Soft Start
    • No Loop Compensation Required
    • Stable With Ceramic and Other Low ESR Capacitors With No Audible Noise
    • Nearly Constant Switching Frequency Programmable From 200 kHz to 1 MHz
  • Current Regulators:
    • Programmable LED Current from 50 mA to 200 mA
    • 1000:1 Contrast Ratio at a Dimming Frequency of More Than 3 kHz, Minimum LED Current Pulse Width is 300 ns
    • Two Individual Dimmable LED Strings up to 65 V, Total 15 W (Typically 28 LEDs at 150 mA)
    • Dynamic Headroom Control Maximizes Efficiency
    • Over-Power Protection
    • ±3% Current Accuracy
  • Supervisory Functions:
    • Precision Enable
    • COMM I/O Pin for Diagnostic and Commands
    • Thermal Shutdown Protection
    • Thermally Enhanced 20-Pin HTSSOP package
open-in-new 查找其它 通用照明LED驱动器


The LM3492/-Q1 integrates a boost converter and a two-channel current regulator to implement a high efficient and cost effective LED driver for driving two individually dimmable LED strings with a maximum power of 15 W and an output voltage of up to 65 V. The boost converter employs a proprietary Projected-On-Time control method to give a fast transient response with no compensation required, and a nearly constant switching frequency programmable from 200 kHz to 1 MHz. The application circuit is stable with ceramic capacitors and produces no audible noise on dimming. The programmable peak current limit and soft-start features reduce current surges at start-up, and an integrated 190 mΩ, 3.9-A N-Channel MOSFET switch minimizes the solution size.

The fast slew rate current regulator allows high frequency and narrow pulse width dimming signals to achieve a very high contrast ratio of 1000:1 at a dimming frequency of more than 3 kHz. The LED current is programmable from 50 mA to 200 mA by a single resistor.

To maximize the efficiency, Dynamic Headroom Control (DHC) automatically adjusts the output voltage to a minimum. DHC also facilitates a single BOM for different number of LED in a string, which is required for backlight panels of different size, thereby reducing overall development time and cost. The LM3492/-Q1 comes with a versatile COMM pin which serves as a bidirectional I/O pin interfacing with an external MCU for the following functions: power-good, overtemperature, IOUT overvoltage and undervoltage indications, switching frequency tuning, and channel 1 disabling. Other supervisory functions of the LM3492/-Q1 include precise enable, VCC undervoltage lockout, current regulator over-power protection, and thermal shutdown protection. The LM3492/-Q1 is available in the thermally enhanced 20-pin HTSSOP package.

open-in-new 查找其它 通用照明LED驱动器
LM3492-Q1 正在供货 具有升压转换器和快速电流调节器的汽车类 2 通道独立可调光 LED 驱动器 LM3492-Q1 is an automotive qualified version of LM3492.


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类型 标题 下载最新的英文版本 日期
* 数据表 LM3492/-Q1 Two-Channel Individual Dimmable LED Driver With Boost Converter and Fast Current Regulator 数据表 2016年 10月 31日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 2018年 6月 25日
技术文章 Here's how body electronics and lighting technology are changing the driving experience 2016年 9月 26日
技术文章 LED brightness adjustment: high-frequency PWM dimming 2016年 8月 26日
技术文章 Take better selfies with innovative LED flashes 2014年 11月 18日
技术文章 Solving the automotive EMI issues in new cars with all the screens 2014年 9月 10日
应用手册 AN-1656 Design Challenges of Switching LED Drivers 2013年 5月 3日
用户指南 AN-2056 LM3492 Evaluation Board Reference Design 2013年 5月 1日
应用手册 AN-2192 LM3492 12VAC, 7W LED Driver for AR111 Application 2013年 5月 1日
更多文献资料 LED 照明 灯泡替代及筒灯照明解决方案 2013年 3月 28日
应用手册 Application Note 1656 Design Challenges of Switching LED Drivers (cn) 下载最新的英文版本 (Rev.A) 2007年 10月 18日




评估板 下载

The LM3492 demonstration board included in this package is designed for converting nominal 12VAC from electronic transformer output to drive seven series connected LEDs at 360- mA average current. The end user can directly light up a LED string through the demonstration board from an electronic (...)

  • Drop-in compatible with electronic transformers
  • Excellent compatibility with various electronic transformers
  • Regulated LED current
  • Flicker free operation
评估板 下载

The LM3492 integrates a boost converter and a two-channel current regulator to implement a high efficient and cost effective LED driver for driving two individually dimmable LED strings with a maximum power of 15W and an output voltage of up to 65V. The boost converter employs a proprietary (...)


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参考设计 下载
LM3492 - 用于 AR111 应用的 12VAC、7W LED 驱动器
PMP8003 — 此演示板突出了 LM3492 – 7W LED 驱动器的性能,该驱动器可通过电子变压器或 50/60Hz 变压器或直流电源,为包含 6/7 个串联的 360mA LED 的单/双 LED 灯串供电。这是一个双层板,上层放置组件,底层可与 LED (...)


封装 引脚 下载
HTSSOP (PWP) 20 了解详情


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