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LM3409HV电流不稳定

Other Parts Discussed in Thread: LM3409HV, LM3409

你好!我用LM3409HV设计了一款DC-DC的LED驱动。参数如下:
      1.VIN   60VDC  
      2.Vout  6-48V  Iout1.05A
      3.EN Pin PWM 调光
      4. L=33uH  Roff=36K F=500K
现在问题是输出电压从6-48V调整时 电流不稳定 MOS温度也比较高。我无法进入3409的设计页面。里面无法找到LM3409
                                  谢谢!