- 制造厂商：TI
- 产品类别：电源管理
- 技术类目：LED 驱动器 - 照明 LED 驱动器
- 功能描述：交流/直流离线式 LED 驱动器
- 点击这里打开及下载LM3444的技术文档资料
- TI代理渠道，提供当日发货、严格的质量标准，满足您的目标价格
The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high-frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCC undervoltage lockout. The LM3444 is available in a low profile 10-pin VSSOP package or an 8-lead SOIC package.
- Application Voltage Range: 80 VAC to 277 VAC
- Capable of Controlling LED Currents Greater than 1 A
- Adjustable Switching Frequency
- Low Quiescent Current
- Adaptive Programmable Off-Time Allows for Constant Ripple Current
- Thermal Shutdown
- No Flicker at 120 Hz
- Low-Profile 10-Pin VSSOP Package or 8-Lead SOIC Package
- Patented Drive Architecture
- Input voltage (type)
- AC/DC
- Topology
- Buck, Flyback
- Vin (Min) (V)
- 8
- Vin (Max) (V)
- 13
- Iout (Max) (A)
- 2
- Iq (Typ) (mA)
- 1.58
- Features
- Adjustable Switch Frequency, Thermal Shutdown
- Operating temperature range (C)
- -40 to 125
- Dimming method
- Analog
LM3444的完整型号有：LM3444MA/NOPB、LM3444MAX/NOPB、LM3444MM/NOPB、LM3444MMX/NOPB，以下是这些产品的关键参数及官网采购报价：
LM3444MA/NOPB，工作温度：-40 to 125，封装：SOIC (D)-8，包装数量MPQ：95个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3444MA/NOPB的批量USD价格：.42（1000+）
LM3444MAX/NOPB，工作温度：-40 to 125，封装：SOIC (D)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3444MAX/NOPB的批量USD价格：.35（1000+）
LM3444MM/NOPB，工作温度：-40 to 125，封装：VSSOP (DGS)-10，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAUAG，TI官网LM3444MM/NOPB的批量USD价格：.42（1000+）
LM3444MMX/NOPB，工作温度：-40 to 125，封装：VSSOP (DGS)-10，包装数量MPQ：3500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3444MMX/NOPB的批量USD价格：.35（1000+）
LM3444-EDSNEV — LM3444 A19 Edison 改良 LED 驱动器（不可调光）评估板
The evaluation board included in this shipment converts 85 VRMS to 135 VRMS input and drives five to thirteen series connected LEDs at the currents listed in the Evaluation Board Operating Conditions section.
This is a two-layer board using the bottom and top layer for component placement. The board (...)
LM3444MR16BSTRB — LM3444 升压拓扑 MR16 LED 灯泡参考设计
This reference design was based on the released LM3444 IC. It was developed to minimize the current spikes coming out of an electronic transformer to less than 5A, which is a typical transformer rating, when driving an LED MR16 circuit. The off the shelf LED MR16 solutions exhibit spikes that (...)
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在?PSpice for TI 设计和仿真工具中，您可以搜索 TI (...)
