51 SCM-based PFM type switching power supply code, EXB840 used to drive the IGBT, 1602 show that the switching frequency can be directly through the keyboard input frequency step for the 0.5KHz.

51PFMswithpower
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...............\wz.lnp
...............\wz.M51
...............\wz.Opt
...............\wz.plg
...............\wz.Uv2
...............\wz_Uv2.Bak

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