Abstract

In designing small power switching mode power supply (SMPS),its functions, tech-parameter and cost should be considered at the same time. TOPSwitch has stronger functions than the discrete components. It is easy and flexible to design SMPS based TOPSwitch and the products always get less cost. SMPS based on UC3842 or UC3843 is compared to the one based TOPSwitch in the paper. Then an actual project used flyback convertor is put forward.

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