急,求直流75V输入LED驱动电源方案

把详细的要求告诉我,看看我能帮到你?NKF898@163．COM

最好的方案是用升压恒流电路,一种电路就能对付你那所有的情况.

FLYBACK升压恒流

谢谢,能否给个方案?

好的,请问兄弟贵姓?

给个具体的方案好吗 ?兄弟,谢谢哦

阁下可以看下NS的LM5118.LM3402HV.
LM3402的特性:
--------------------------------------------------------------------------------
• Integrated 0.5A N-channel MOSFET  
• VIN Range from 6V to 42V (LM3402)  
• VIN Range from 6V to 75V (LM3402HV)  
• 500 mA Output Current Over Temperature  
• Cycle-by-Cycle Current Limit  
• No Control Loop Compensation Required  
• Separate PWM Dimming and Low Power Shutdown  
• Supports all-ceramic output capacitors and capacitor-less outputs  
• Thermal shutdown protection  
• MSOP-8, PSOP-8 Packages  
--------------------------------------------------------------------------------
• Integrated 0.5A N-channel MOSFET  
• VIN Range from 6V to 42V (LM3402)  
• VIN Range from 6V to 75V (LM3402HV)  
• 500 mA Output Current Over Temperature  
• Cycle-by-Cycle Current Limit  
• No Control Loop Compensation Required  
• Separate PWM Dimming and Low Power Shutdown  
• Supports all-ceramic output capacitors and capacitor-less outputs  
• Thermal shutdown protection  
• MSOP-8, PSOP-8 Packages

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