Abstract

Regulatory standards such as IEC555-2 require switch-mode power supplies (SMPS) to have a high power factor. The addition of a power-factor-correction (PFC) pre-regulator to an SMPS may enable it to meet the regulatory requirement. But this is, in most cases, not an optimum design. Based on the example of a power supply system for telecommunication applications, a method to optimize the overall design is presented in this paper. In the new design the need for a separate SMPS (in addition to the PFC pre-regulator) is eliminated. Computer simulations are presented to show that the new design approach is possible and practical.

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