深圳市瑞新盛科技有限公司
联系人杨生13823608717 销售热线：0755-23612148 QQ：1732328706
主营LED驱动IC，车灯驱动IC，电源管理IC，MOS管，等各种电子元件。
LM3414特点：
Supports LED Power up to 60 W(1): 18x 3-W
HBLEDs
RequiresNo External Current Sensing Resistor
±3% LED Current Accuracy
Up to 96% Efficiency
High Contrast Ratio (Minimum Dimming Current
Pulse Width <10 µS)
Integrated Low-Side N-Channel MOSFET
Adjustable Constant LED Current From 350 mA to
1000 mA
Support Analog Dimming and Thermal Fold-Back
Wide Input Voltage Range:
4.5 V to 42 V (LM3414)
4.5 V to 65 V (LM3414HV)
Constant Switching Frequency Adjustable from
250 kHz to 1000 kHz
Thermal Shutdown Protection
Power Enhanced SOIC-8 or 3 mm × 3 mm
WSON-8 Package
Supports LED Power up to 60 W(1): 18x 3-W
HBLEDs
RequiresNo External Current Sensing Resistor
±3% LED Current Accuracy
Up to 96% Efficiency
High Contrast Ratio (Minimum Dimming Current
Pulse Width <10 µS)
Integrated Low-Side N-Channel MOSFET
Adjustable Constant LED Current From 350 mA to
1000 mA
Support Analog Dimming and Thermal Fold-Back
Wide Input Voltage Range:
4.5 V to 42 V (LM3414)
4.5 V to 65 V (LM3414HV)
Constant Switching Frequency Adjustable from
250 kHz to 1000 kHz
Thermal Shutdown Protection
Power Enhanced SOIC-8 or 3 mm × 3 mm
WSON-8 Package
60W 常见阳极恒流降压 LED 驱动器，无需外部 电流感应电阻
LM3414描述：
The LM3414 and LM3414HV are 1-A 60-W(1) common anode-capable constant current buck LED drivers. They are suitable for driving single string of 3-W HBLED with up to 96% efficiency. They accept input voltages from 4.5 VDC to 65 VDC and deliver up to 1-A average LED current with ±3% accuracy. The integrated low-side N-channel power MOSFET and current sensing element realize simple and low component count circuitry, as no bootstrapping capacitor and external current-sensing resistor are required. An external small-signal resistor to ground provides very fine LED current adjustment, analog dimming, and thermal fold-back functions.
LM3414Constant switching frequency operation eases EMI. No external loop compensation network is needed. The proprietary Pulse-Level-Modulation (PLM) control method benefits in high conversion efficiency and true average LED current regulation. Fast response time realizes fine LED current pulse fulfilling the 240 Hz 256-step dimming resolution requirement for general lighting.
The LM3414 and LM3414HV are available in SOIC-8 and 3 mm × 3 mm WSON-8 packages.
丰田介绍，天然气燃料电池动力系统开始工作的第一步是将天然气分解成为一氧化碳和氢气。同时，压缩机还将空气注入到混合物中，并且通过燃料电池堆的化学反应产生电力。
此过程当中会产生一部分一氧化碳和氢气的废气，这些废气会进入一台微型燃气轮机，燃烧过程产生更多的电力。
最后一步，发电系统还会使用废热产生额外的电力。
目前，丰田正在日本的圆町工厂对这种天然气燃料电池系统进行试验，主要为了评估其能效、性能和耐久性。
丰田表示，这种天然气燃料电池系统可以产生335马力动力，未来还要经过小型化的设计过程。
丰田认为，天然气燃料电池系统的发电效率为55%，而在废热发电系统的扶持下，这一数字最终会被提升到65%。而目前氢燃料电池的发电效率普遍为50-55%。
