Circuit: * C:\Program Files\LTC\LTspiceIV\Draft2.asc

Error on line 27 : l9 0 n041 15 mh
  Unknown parameter "mh"
Unknown node in .ic card: "vcc" -- ignoring
Direct Newton iteration failed to find .op point.  (Use ".option noopiter" to skip.)
Starting Gmin stepping
Gmin = 10
Gmin = 1.07374
vernier = 0.5
vernier = 0.666667
Gmin = 0.326867
vernier = 0.888888
Gmin = 0.055448
vernier = 1
Gmin = 0.006089
Gmin = 0.000653801
Gmin = 7.02013e-005
Gmin = 7.53781e-006
Gmin = 8.09366e-007
Gmin = 8.6905e-008
Gmin = 9.33136e-009
Gmin = 1.00195e-009
Gmin = 1.07583e-010
Gmin = 1.15517e-011
Gmin = 1.24035e-012
Gmin = 1.33182e-013
Gmin = 0
Gmin stepping succeeded in finding the operating point.

Heightened Def Con from 0.0092746 to 0.0092746
Heightened Def Con from 0.0146929 ++++++++++++++++++++++++++++++++++++++++++++++++++Fatal Error: Analysis:  Time step too small; time = 0.0146929, timestep = 1.25047e-017: trouble with bzx84c15l-instance d9

請各位大哥大姐賜教，LT spice出現上面的仿真出錯時怎么解決。還有我用UC3842B仿真不出來，后來用LT1243才可以，這是為什么呢，我看了資料說著兩個IC差不多。

經過多日的奮斗還是把它仿真出來，仿真效果和實際還是瞞相近的，電路稍微做了點修改，但是S26V 實際中需要加入假負載。實物中用的是UC3843，一些管子也做了修改。