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.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM3424 Constant Current N-channel Controller with Thermal Foldback For Driving LEDs datasheet (Rev. D) | PDF | HTML | 2019年 7月 31日 |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| Technical article | Driving LEDs: topology matters | PDF | HTML | 2016年 2月 26日 | |
| Application note | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013年 5月 3日 | ||
| EVM User's guide | AN-1967 LM3424 Buck-Boost Evaluation Board (Rev. A) | 2013年 5月 3日 | ||
| EVM User's guide | AN-1969 LM3424 Boost Evaluation Board (Rev. A) | 2013年 5月 3日 | ||
| Application note | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 2013年 4月 23日 | ||
| User guide | Ambient Light Adaptive LED Driver User Guide | 2012年 1月 27日 |
設計與開發
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LM3424BKBSTEVAL — LM3424 降壓-升壓評估板
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 升壓評估板
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, (...)
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
| 封裝 | 引腳 | 下載 |
|---|---|---|
| HTSSOP (PWP) | 20 | 檢視選項 |
訂購與品質
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- MTBF/FIT 估算值
- 材料內容
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