LM3424
- VIN range from 4.5 V to 75 V
- High-side adjustable current sense
- 2-Ω, 1-A peak MOSFET gate driver
- Input undervoltage and output overvoltage protection
- PWM and analog dimming
- Cycle-by-cycle current limit
- Programmable soft-start and slope compensation
- Programmable, synchronizable switching frequency
- Programmable thermal foldback
- Precision voltage reference
- Low-power shutdown and thermal shutdown
The LM3424 is a versatile high voltage N-channel MOSFET controller for LED drivers. It can be easily configured in buck, boost, buck-boost and SEPIC topologies. In addition, the LM3424 includes a thermal foldback feature for temperature management of the LEDs. This flexibility, along with an input voltage rating of 75 V, makes the LM3424 ideal for illuminating LEDs in a large family of applications.
Adjustable high-side current sense allows for tight regulation of the LED current with the highest efficiency possible. The LM3424 uses standard peak current-mode control providing inherent input voltage feed-forward compensation for better noise immunity. It is designed to provide accurate thermal foldback with a programmable foldback breakpoint and slope. In addition, a 2.45V reference is provided.
The LM3424 includes a high-voltage startup regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2.0 MHz and external synchronization is possible. The controller is capable of high speed PWM dimming and analog dimming.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LM3424 Constant Current N-channel Controller with Thermal Foldback For Driving LEDs 数据表 (Rev. D) | PDF | HTML | 2019-7-31 | ||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 技术文章 | Driving LEDs: topology matters | PDF | HTML | 2016-2-26 | |||
| 应用手册 | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013-5-3 | ||||
| 应用手册 | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 2013-4-23 | ||||
| 用户指南 | Ambient Light Adaptive LED Driver User Guide | 2012-1-27 |
设计与开发
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LM3424BKBSTEVAL — LM3424 降压升压评估板
This wide range evaluation board showcases the LM3424 NFET controller used with a buck-boost current regulator. It is designed to drive 4 to 10 LEDs at a maximum average LED current of 1A from a DC input voltage of 10 to 70V. The evaluation board showcases many of the LM3424 features including (...)
LM3424BSTEVAL — LM3424 升压评估板
This evaluation board showcases the LM3424 NFET controller used with a boost current regulator. It is designed to drive 9 to 12 LEDs at a maximum average LED current of 1A from a DC input voltage of 10 to 26V. The evaluation board showcases many of the LM3424 features including thermal foldback, (...)
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
订购和质量
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